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1

Gas hydrate cool storage system  

DOE Patents (OSTI)

The invention presented relates to the development of a process utilizing a gas hydrate as a cool storage medium for alleviating electric load demands during peak usage periods. Several objectives of the invention are mentioned concerning the formation of the gas hydrate as storage material in a thermal energy storage system within a heat pump cycle system. The gas hydrate was formed using a refrigerant in water and an example with R-12 refrigerant is included. (BCS)

Ternes, M.P.; Kedl, R.J.

1984-09-12T23:59:59.000Z

2

THE PRODUCTION OF GAS HYDRATES  

E-Print Network (OSTI)

Mr. Chairman and Members of the Subcommittee, thank-you for the opportunity to appear before you today to discuss the production and economics of gas hydrate development.

Steven H. Hancock; P. Eng

2009-01-01T23:59:59.000Z

3

The Great Gas Hydrate Escape  

NLE Websites -- All DOE Office Websites (Extended Search)

Great Gas Great Gas Hydrate Escape The Great Gas Hydrate Escape Computer simulations revealing how methane and hydrogen pack into gas hydrates could enlighten alternative fuel production and carbon dioxide storage January 25, 2012 | Tags: Carver, Chemistry, Energy Technologies, Hopper, Materials Science PNNL Contact: Mary Beckman , +1 509 375-3688, mary.beckman@pnl.gov NERSC Contact: Linda Vu, +1 510 495 2402, lvu@lbl.gov The methane trapped in frozen water burns easily, creating ice on fire. For some time, researchers have explored flammable ice for low-carbon or alternative fuel or as a place to store carbon dioxide. Now, a computer analysis of the ice and gas compound, known as a gas hydrate, reveals key details of its structure. The results show that hydrates can hold hydrogen

4

Marine Electromagnetic Methods for Gas Hydrate Characterization  

E-Print Network (OSTI)

D. , 2003: Natural Gas Hydrates: Background and History ofIn Natural Gas Hydrate: Back- ground and History ofNatural Gas Hydrate: Occurrence, Distribution and Detection, chapter History

Weitemeyer, Karen A

2008-01-01T23:59:59.000Z

5

Marine electromagnetic methods for gas hydrate characterization  

E-Print Network (OSTI)

D. , 2003: Natural Gas Hydrates: Background and History ofIn Natural Gas Hydrate: Back- ground and History ofNatural Gas Hydrate: Occurrence, Distribution and Detection, chapter History

Weitemeyer, Karen Andrea

2008-01-01T23:59:59.000Z

6

Natural gas production from Arctic gas hydrates  

Science Conference Proceedings (OSTI)

The natural gas hydrates of the Messoyakha field in the West Siberian basin of Russia and those of the Prudhoe Bay-Kuparuk River area on the North Slope of Alaska occur within a similar series of interbedded Cretaceous and Tertiary sandstone and siltstone reservoirs. Geochemical analyses of gaseous well-cuttings and production gases suggest that these two hydrate accumulations contain a mixture of thermogenic methane migrated from a deep source and shallow, microbial methane that was either directly converted to gas hydrate or was first concentrated in existing traps and later converted to gas hydrate. Studies of well logs and seismic data have documented a large free-gas accumulation trapped stratigraphically downdip of the gas hydrates in the Prudhoe Bay-Kuparuk River area. The presence of a gas-hydrate/free-gas contact in the Prudhoe Bay-Kuparuk River area is analogous to that in the Messoyakha gas-hydrate/free-gas accumulation, from which approximately 5.17x10[sup 9] cubic meters (183 billion cubic feet) of gas have been produced from the hydrates alone. The apparent geologic similarities between these two accumulations suggest that the gas-hydrated-depressurization production method used in the Messoyakha field may have direct application in northern Alaska. 30 refs., 15 figs., 3 tabs.

Collett, T.S. (Geological Survey, Denver, CO (United States))

1993-01-01T23:59:59.000Z

7

Gas production from hydrate-bearing sediments.  

E-Print Network (OSTI)

??Gas hydrates are crystalline compounds made of gas and water molecules. Methane hydrates are found in marine sediments and permafrost regions; extensive amounts of methane… (more)

Jang, Jaewon

2011-01-01T23:59:59.000Z

8

NETL: Methane Hydrates - Global Assessment of Methane Gas Hydrates  

NLE Websites -- All DOE Office Websites (Extended Search)

Assessment of Methane Gas Hydrates Last Reviewed 6142013 DE-FE0003060 Goal The goal of this project is to develop a global assessment of methane gas hydrates that will facilitate...

9

Natural Gas Hydrates Update 1998-2000  

Reports and Publications (EIA)

Significant events have transpired on the natural gas hydrate research and development front since "Future Supply Potential of Natural Gas Hydrates" appeared in Natural Gas 1998 Issues and Trends and in the Potential Gas Committee's 1998 biennial report.

David F. Morehouse

2001-04-25T23:59:59.000Z

10

Gas Hydrate Storage of Natural Gas  

Science Conference Proceedings (OSTI)

Environmental and economic benefits could accrue from a safe, above-ground, natural-gas storage process allowing electric power plants to utilize natural gas for peak load demands; numerous other applications of a gas storage process exist. A laboratory study conducted in 1999 to determine the feasibility of a gas-hydrates storage process looked promising. The subsequent scale-up of the process was designed to preserve important features of the laboratory apparatus: (1) symmetry of hydrate accumulation, (2) favorable surface area to volume ratio, (3) heat exchanger surfaces serving as hydrate adsorption surfaces, (4) refrigeration system to remove heat liberated from bulk hydrate formation, (5) rapid hydrate formation in a non-stirred system, (6) hydrate self-packing, and (7) heat-exchanger/adsorption plates serving dual purposes to add or extract energy for hydrate formation or decomposition. The hydrate formation/storage/decomposition Proof-of-Concept (POC) pressure vessel and supporting equipment were designed, constructed, and tested. This final report details the design of the scaled POC gas-hydrate storage process, some comments on its fabrication and installation, checkout of the equipment, procedures for conducting the experimental tests, and the test results. The design, construction, and installation of the equipment were on budget target, as was the tests that were subsequently conducted. The budget proposed was met. The primary goal of storing 5000-scf of natural gas in the gas hydrates was exceeded in the final test, as 5289-scf of gas storage was achieved in 54.33 hours. After this 54.33-hour period, as pressure in the formation vessel declined, additional gas went into the hydrates until equilibrium pressure/temperature was reached, so that ultimately more than the 5289-scf storage was achieved. The time required to store the 5000-scf (48.1 hours of operating time) was longer than designed. The lower gas hydrate formation rate is attributed to a lower heat transfer rate in the internal heat exchanger than was designed. It is believed that the fins on the heat-exchanger tubes did not make proper contact with the tubes transporting the chilled glycol, and pairs of fins were too close for interior areas of fins to serve as hydrate collection sites. A correction of the fabrication fault in the heat exchanger fin attachments could be easily made to provide faster formation rates. The storage success with the POC process provides valuable information for making the process an economically viable process for safe, aboveground natural-gas storage.

Rudy Rogers; John Etheridge

2006-03-31T23:59:59.000Z

11

Controls on Gas Hydrate Formation and Dissociation  

SciTech Connect

The main objectives of the project were to monitor, characterize, and quantify in situ the rates of formation and dissociation of methane hydrates at and near the seafloor in the northern Gulf of Mexico, with a focus on the Bush Hill seafloor hydrate mound; to record the linkages between physical and chemical parameters of the deposits over the course of one year, by emphasizing the response of the hydrate mound to temperature and chemical perturbations; and to document the seafloor and water column environmental impacts of hydrate formation and dissociation. For these, monitoring the dynamics of gas hydrate formation and dissociation was required. The objectives were achieved by an integrated field and laboratory scientific study, particularly by monitoring in situ formation and dissociation of the outcropping gas hydrate mound and of the associated gas-rich sediments. In addition to monitoring with the MOSQUITOs, fluid flow rates and temperature, continuously sampling in situ pore fluids for the chemistry, and imaging the hydrate mound, pore fluids from cores, peepers and gas hydrate samples from the mound were as well sampled and analyzed for chemical and isotopic compositions. In order to determine the impact of gas hydrate dissociation and/or methane venting across the seafloor on the ocean and atmosphere, the overlying seawater was sampled and thoroughly analyzed chemically and for methane C isotope ratios. At Bush hill the pore fluid chemistry varies significantly over short distances as well as within some of the specific sites monitored for 440 days, and gas venting is primarily focused. The pore fluid chemistry in the tub-warm and mussel shell fields clearly documented active gas hydrate and authigenic carbonate formation during the monitoring period. The advecting fluid is depleted in sulfate, Ca Mg, and Sr and is rich in methane; at the main vent sites the fluid is methane supersaturated, thus bubble plumes form. The subsurface hydrology exhibits both up-flow and down-flow of fluid at rates that range between 0.5 to 214 cm/yr and 2-162 cm/yr, respectively. The fluid flow system at the mound and background sites are coupled having opposite polarities that oscillate episodically between 14 days to {approx}4 months. Stability calculations suggest that despite bottom water temperature fluctuations, of up to {approx}3 C, the Bush Hill gas hydrate mound is presently stable, as also corroborated by the time-lapse video camera images that did not detect change in the gas hydrate mound. As long as methane (and other hydrocarbon) continues advecting at the observed rates the mound would remain stable. The {_}{sup 13}C-DIC data suggest that crude oil instead of methane serves as the primary electron-donor and metabolic substrate for anaerobic sulfate reduction. The oil-dominated environment at Bush Hill shields some of the methane bubbles from being oxidized both anaerobically in the sediment and aerobically in the water column. Consequently, the methane flux across the seafloor is higher at Bush hill than at non-oil rich seafloor gas hydrate regions, such as at Hydrate Ridge, Cascadia. The methane flux across the ocean/atmosphere interface is as well higher. Modeling the methane flux across this interface at three bubble plumes provides values that range from 180-2000 {_}mol/m{sup 2} day; extrapolating it over the Gulf of Mexico basin utilizing satellite data is in progress.

Miriam Kastner; Ian MacDonald

2006-03-03T23:59:59.000Z

12

NETL: Methane Hydrates - Global Assessment of Methane Gas Hydrates  

NLE Websites -- All DOE Office Websites (Extended Search)

Global Assessment of Methane Gas Hydrates Last Reviewed 12/18/2013 Global Assessment of Methane Gas Hydrates Last Reviewed 12/18/2013 DE-FE0003060 Goal The goal of this project is to develop a global assessment of methane gas hydrates that will facilitate informed decision-making regarding the potential development of gas hydrate resources between the scientific community and other stakeholders/decision makers. The Assessment will provide science-based information on the role of gas hydrates in natural climate change and the carbon cycle, their sensitivity to climate change, and the potential environmental and socio-economic impacts of hydrate production. Performers Stiftelsen GRID-Arendal, Arendal, Norway Funding Institutions United Nations Environment Programme (UNEP) Statoil Schlumberger United States Department of Energy (USDOE)

13

Natural Gas Hydrates Update 2000-2002  

Reports and Publications (EIA)

Natural gas hydrates research and development (R&D) activity expanded significantly during the 2000-2002.

David F. Morehouse

2003-04-01T23:59:59.000Z

14

Gas hydrate reservoir characteristics and economics  

SciTech Connect

The primary objective of the DOE-funded USGS Gas Hydrate Program is to assess the production characteristics and economic potential of gas hydrates in northern Alaska. The objectives of this project for FY-1992 will include the following: (1) Utilize industry seismic data to assess the distribution of gas hydrates within the nearshore Alaskan continental shelf between Harrison Bay and Prudhoe Bay; (2) Further characterize and quantify the well-log characteristics of gas hydrates; and (3) Establish gas monitoring stations over the Eileen fault zone in northern Alaska, which will be used to measure gas flux from destabilized hydrates.

Collett, T.S.; Bird, K.J.; Burruss, R.C.; Lee, Myung W.

1992-01-01T23:59:59.000Z

15

Gas hydrate reservoir characteristics and economics  

SciTech Connect

The primary objective of the DOE-funded USGS Gas Hydrate Program is to assess the production characteristics and economic potential of gas hydrates in northern Alaska. The objectives of this project for FY-1992 will include the following: (1) Utilize industry seismic data to assess the distribution of gas hydrates within the nearshore Alaskan continental shelf between Harrison Bay and Prudhoe Bay; (2) Further characterize and quantify the well-log characteristics of gas hydrates; and (3) Establish gas monitoring stations over the Eileen fault zone in northern Alaska, which will be used to measure gas flux from destabilized hydrates.

Collett, T.S.; Bird, K.J.; Burruss, R.C.; Lee, Myung W.

1992-06-01T23:59:59.000Z

16

Gas hydrates: Technology status report  

Science Conference Proceedings (OSTI)

In 1983, the US Department of Energy (DOE) assumed the responsibility for expanding the knowledge base and for developing methods to recover gas from hydrates. These are ice-like mixtures of gas and water where gas molecules are trapped within a framework of water molecules. This research is part of the Unconventional Gas Recovery (UGR) program, a multidisciplinary effort that focuses on developing the technology to produce natural gas from resources that have been classified as unconventional because of their unique geologies and production mechanisms. Current work on gas hydrates emphasizes geological studies; characterization of the resource; and generic research, including modeling of reservoir conditions, production concepts, and predictive strategies for stimulated wells. Complementing this work is research on in situ detection of hydrates and field tests to verify extraction methods. Thus, current research will provide a comprehensive technology base from which estimates of reserve potential can be made, and from which industry can develop recovery strategies. 7 refs., 3 figs., 6 tabs.

Not Available

1987-01-01T23:59:59.000Z

17

NETL: Methane Hydrates - DOE/NETL Projects - Advanced Gas Hydrate  

NLE Websites -- All DOE Office Websites (Extended Search)

Comparative Assessment of Advanced Gas Hydrate Production Methods Last Reviewed 09/23/2009 Comparative Assessment of Advanced Gas Hydrate Production Methods Last Reviewed 09/23/2009 DE-FC26-06NT42666 Goal The goal of this project is to compare and contrast, through numerical simulation, conventional and innovative approaches for producing methane from gas hydrate-bearing geologic reservoirs. Numerical simulation is being used to assess the production of natural gas hydrates from geologic deposits using three production technologies: 1) depressurization, 2) direct CO2 exchange, and 3) dissociation-reformation CO2 exchange. Performers Battelle Pacific Northwest Division, Richland, Washington 99352 Background There are relatively few published studies of commercial production methods for gas hydrates, and all of these studies have examined essentially

18

Numerical Modeling of Gas Recovery from Methane Hydrate Reservoirs.  

E-Print Network (OSTI)

??ABSTRACTClass 1 hydrate deposits are characterized by a hydrate bearing layer underlain by a two phase, free-gas and water, zone. A Class 1 hydrate reservoir… (more)

Silpngarmlert, Suntichai

2007-01-01T23:59:59.000Z

19

NETL: Methane Hydrates - DOE/NETL Projects - Advanced Gas Hydrate...  

NLE Websites -- All DOE Office Websites (Extended Search)

Comparative Assessment of Advanced Gas Hydrate Production Methods Last Reviewed 09232009 DE-FC26-06NT42666 Goal The goal of this project is to compare and contrast, through...

20

Rapid Gas Hydrate Formation Process Opportunity  

NLE Websites -- All DOE Office Websites (Extended Search)

Gas Hydrate Formation Process Gas Hydrate Formation Process Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) is seeking collaborative research and licensing partners interested in implementing United States Non-provisional Patent Application entitled "Rapid Gas Hydrate Formation Process." Disclosed in this application is a method and device for producing gas hydrates from a two-phase mixture of water and a hydrate forming gas such as methane (CH 4 ) or carbon dioxide (CO 2 ). The two-phase mixture is created in a mixing zone, which may be contained within the body of the spray nozzle. The two-phase mixture is subsequently sprayed into a reaction vessel, under pressure and temperature conditions suitable for gas hydrate formation. The reaction

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Submarine pingoes: Indicators of shallow gas hydrates in a pockmark at Nyegga, Norwegian Sea  

E-Print Network (OSTI)

forming and disintegrating gas hydrate pingoes on the seafloor. The two most important ones are believed also manifest the whereabouts of shallow gas hydrates. The pingoes emphasise the dynamic nature and removal of plugs. Proc. Conf. on Natural Gas Hydrates. Salt Lake City. Bates, R.L., Jackson, J.A., 1987

Svensen, Henrik

22

Electrical Resistivity Investigation of Gas Hydrate Distribution...  

NLE Websites -- All DOE Office Websites (Extended Search)

10 Electrical Resistivity Investigation of Gas Hydrate Distribution in the Mississippi Canyon Block 118, Gulf of Mexico Submitted by: Baylor University One Bear Place, Box 97354...

23

Electrical Resistivity Investigation of Gas Hydrate Distribution...  

NLE Websites -- All DOE Office Websites (Extended Search)

January 1 - March 31, 2011 Electrical Resistivity Investigation of Gas Hydrate Distribution in the Mississippi Canyon Block 118, Gulf of Mexico Submitted by: Baylor University One...

24

Electrical Resistivity Investigation of Gas Hydrate Distribution...  

NLE Websites -- All DOE Office Websites (Extended Search)

09 Electrical Resistivity Investigation of Gas Hydrate Distribution in the Mississippi Canyon Block 118, Gulf of Mexico Submitted by: Baylor University One Bear Place, Box 97354...

25

Electrical Resistivity Investigation of Gas Hydrate Distribution...  

NLE Websites -- All DOE Office Websites (Extended Search)

January 1 - March 31, 2012 Electrical Resistivity Investigation of Gas Hydrate Distribution in the Mississippi Canyon Block 118, Gulf of Mexico Submitted by: Baylor University One...

26

Electrical Resistivity Investigation of Gas Hydrate Distribution...  

NLE Websites -- All DOE Office Websites (Extended Search)

April 1 - June 30, 2011 Electrical Resistivity Investigation of Gas Hydrate Distribution in the Mississippi Canyon Block 118, Gulf of Mexico Submitted by: Baylor University One...

27

Electrical Resistivity Investigation of Gas Hydrate Distribution...  

NLE Websites -- All DOE Office Websites (Extended Search)

July 1 - September 30, 2011 Electrical Resistivity Investigation of Gas Hydrate Distribution in the Mississippi Canyon Block 118, Gulf of Mexico Submitted by: Baylor University One...

28

Development of Alaskan gas hydrate resources  

Science Conference Proceedings (OSTI)

The research undertaken in this project pertains to study of various techniques for production of natural gas from Alaskan gas hydrates such as, depressurization, injection of hot water, steam, brine, methanol and ethylene glycol solutions through experimental investigation of decomposition characteristics of hydrate cores. An experimental study has been conducted to measure the effective gas permeability changes as hydrates form in the sandpack and the results have been used to determine the reduction in the effective gas permeability of the sandpack as a function of hydrate saturation. A user friendly, interactive, menu-driven, numerical difference simulator has been developed to model the dissociation of natural gas hydrates in porous media with variable thermal properties. A numerical, finite element simulator has been developed to model the dissociation of hydrates during hot water injection process.

Kamath, V.A.; Sharma, G.D.; Patil, S.L.

1991-06-01T23:59:59.000Z

29

Physical Properties of Gas Hydrates: A Review  

SciTech Connect

Methane gas hydrates in sediments have been studied by several investigators as a possible future energy resource. Recent hydrate reserves have been estimated at approximately 1016?m3 of methane gas worldwide at standard temperature and pressure conditions. In situ dissociation of natural gas hydrate is necessary in order to commercially exploit the resource from the natural-gas-hydrate-bearing sediment. The presence of gas hydrates in sediments dramatically alters some of the normal physical properties of the sediment. These changes can be detected by field measurements and by down-hole logs. An understanding of the physical properties of hydrate-bearing sediments is necessary for interpretation of geophysical data collected in field settings, borehole, and slope stability analyses; reservoir simulation; and production models. This work reviews information available in literature related to the physical properties of sediments containing gas hydrates. A brief review of the physical properties of bulk gas hydrates is included. Detection methods, morphology, and relevant physical properties of gas-hydrate-bearing sediments are also discussed.

Gabitto, Jorge [Prairie View A& M University; Tsouris, Costas [ORNL

2010-01-01T23:59:59.000Z

30

Method for the Photocatalytic Conversion of Gas Hydrates  

NLE Websites -- All DOE Office Websites (Extended Search)

the Photocatalytic Conversion of Gas Hydrates Opportunity Research is currently active on the patented technology "Method for the Photocatalytic Conversion of Gas Hydrates." The...

31

Gas Hydrates Research Programs: An International Review  

SciTech Connect

Gas hydrates sediments have the potential of providing a huge amount of natural gas for human use. Hydrate sediments have been found in many different regions where the required temperature and pressure conditions have been satisfied. Resource exploitation is related to the safe dissociation of the gas hydrate sediments. Basic depressurization techniques and thermal stimulation processes have been tried in pilot efforts to exploit the resource. There is a growing interest in gas hydrates all over the world due to the inevitable decline of oil and gas reserves. Many different countries are interested in this valuable resource. Unsurprisingly, developed countries with limited energy resources have taken the lead in worldwide gas hydrates research and exploration. The goal of this research project is to collect information in order to record and evaluate the relative strengths and goals of the different gas hydrates programs throughout the world. A thorough literature search about gas hydrates research activities has been conducted. The main participants in the research effort have been identified and summaries of their past and present activities reported. An evaluation section discussing present and future research activities has also been included.

Jorge Gabitto; Maria Barrufet

2009-12-09T23:59:59.000Z

32

Natural gas hydrates - issues for gas production and geomechanical stability  

E-Print Network (OSTI)

Natural gas hydrates are solid crystalline substances found in the subsurface. Since gas hydrates are stable at low temperatures and moderate pressures, gas hydrates are found either near the surface in arctic regions or in deep water marine environments where the ambient seafloor temperature is less than 10°C. This work addresses the important issue of geomechanical stability in hydrate bearing sediments during different perturbations. I analyzed extensive data collected from the literature on the types of sediments where hydrates have been found during various offshore expeditions. To better understand the hydrate bearing sediments in offshore environments, I divided these data into different sections. The data included water depths, pore water salinity, gas compositions, geothermal gradients, and sedimentary properties such as sediment type, sediment mineralogy, and sediment physical properties. I used the database to determine the types of sediments that should be evaluated in laboratory tests at the Lawrence Berkeley National Laboratory. The TOUGH+Hydrate reservoir simulator was used to simulate the gas production behavior from hydrate bearing sediments. To address some important gas production issues from gas hydrates, I first simulated the production performance from the Messsoyakha Gas Field in Siberia. The field has been described as a free gas reservoir overlain by a gas hydrate layer and underlain by an aquifer of unknown strength. From a parametric study conducted to delineate important parameters that affect gas production at the Messoyakha, I found effective gas permeability in the hydrate layer, the location of perforations and the gas hydrate saturation to be important parameters for gas production at the Messoyakha. Second, I simulated the gas production using a hydraulic fracture in hydrate bearing sediments. The simulation results showed that the hydraulic fracture gets plugged by the formation of secondary hydrates during gas production. I used the coupled fluid flow and geomechanical model "TOUGH+Hydrate- FLAC3D" to model geomechanical performance during gas production from hydrates in an offshore hydrate deposit. I modeled geomechanical failures associated with gas production using a horizontal well and a vertical well for two different types of sediments, sand and clay. The simulation results showed that the sediment and failures can be a serious issue during the gas production from weaker sediments such as clays.

Grover, Tarun

2008-08-01T23:59:59.000Z

33

NETL: Methane Hydrates - Gas Hydrate Research in Deep Sea Sediments - New  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrate Research in Deep Sea Sediments - Chatham Rise, New Zealand Task Last Reviewed 12/30/2013 Hydrate Research in Deep Sea Sediments - Chatham Rise, New Zealand Task Last Reviewed 12/30/2013 DE-AI26-06NT42878 Goal The goal of the Interagency Agreement between the National Energy Technology Laboratory and the Naval Research Laboratory is to conduct research to enhance understanding of the extent and dynamics of gas hydrate deposits and their relation to areas of focused fluid flux at and beneath the seafloor. Performer Marine Biogeochemistry Section, Naval Research Laboratory, Washington, DC 20375 Background Methane is a potent greenhouse gas necessitating a better understanding of the mechanisms controlling its contribution to the atmospheric carbon cycle. Active methane fluxes (from deep sediment hydrates and seeps) contribute to shallow sediment biogeochemical carbon cycles, which in turn

34

Noble gases and radiocarbon in natural gas hydrates Gisela Winckler  

E-Print Network (OSTI)

Noble gases and radiocarbon in natural gas hydrates Gisela Winckler Lamont-Doherty Earth 2001; published 24 May 2002. [1] In samples of pure natural gas hydrates from Hydrate Ridge, Cascadia of rigid cages of water molecules that enclose guest gas molecules. The gas component of natural hydrates

Winckler, Gisela

35

NETL: Methane Hydrates - 2012 Ignik Sikumi gas hydrate field trial  

NLE Websites -- All DOE Office Websites (Extended Search)

2012 Ignik Sikumi gas hydrate field trial 2012 Ignik Sikumi gas hydrate field trial Photo of the Ignik Drilling Pad Download 2011/2012 Field Test Data Ignik Sikumi #1 "Fire in the Ice" Video Project Background Participants Ignik Sikumi Well Review CO2-Ch4 Exchange Overview August 2, 2013 - Project operations are complete. Read the Final Project Technical Report [PDF-44.1MB] February 19, 2013 - Data from the 2011/2012 field test is now available! Click here to access data. Status Report - May 7, 2012 Final abandonment of Ignik Sikumi #1 wellsite has been completed. Tubing, casing-tubing annulus, and flatpack were filled with cement per the abandonment procedure approved by the Alaska Oil and Gas Conservation Commission. To minimize effects on the landscape and leave as little trace of the operations as possible, a small area around the wellhead was

36

Strategies for gas production from oceanic Class 3 hydrate accumulations  

E-Print Network (OSTI)

gas phase, liquid phase, ice phase, and hydrate phase. AHydrate; V: Vapor (gas phase); I: Ice; Q 1 : Quadruple point

Moridis, George J.; Reagan, Matthew T.

2007-01-01T23:59:59.000Z

37

Hydrate Control for Gas Storage Operations  

Science Conference Proceedings (OSTI)

The overall objective of this project was to identify low cost hydrate control options to help mitigate and solve hydrate problems that occur in moderate and high pressure natural gas storage field operations. The study includes data on a number of flow configurations, fluids and control options that are common in natural gas storage field flow lines. The final phase of this work brings together data and experience from the hydrate flow test facility and multiple field and operator sources. It includes a compilation of basic information on operating conditions as well as candidate field separation options. Lastly the work is integrated with the work with the initial work to provide a comprehensive view of gas storage field hydrate control for field operations and storage field personnel.

Jeffrey Savidge

2008-10-31T23:59:59.000Z

38

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

of gas hydrates. The effort aims to quantify the mechanical characteristics of methane hydrate and hydrate cemented sediments for use in models of the dynamic behavior of...

39

NETL: Methane Hydrates - Hydrate Modeling - TOUGH-Fx/HYDRATE  

NLE Websites -- All DOE Office Websites (Extended Search)

Dynamics Geological & Env. Systems Materials Science Contacts TECHNOLOGIES Oil & Natural Gas Supply Deepwater Technology Enhanced Oil Recovery Gas Hydrates Natural Gas Resources...

40

Rock-physics Models for Gas-hydrate Systems Associated  

E-Print Network (OSTI)

at Austin, Austin, Texas, U.S.A. ABSTRACT R ock-physics models are presented describing gas-hydrate systems. Knapp, and R. Boswell, eds., Natural gas hydrates--Energy resource potential and associated geologic

Texas at Austin, University of

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Status of DOE Research Efforts in Gas Hydrates | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Status of DOE Research Efforts in Gas Hydrates Status of DOE Research Efforts in Gas Hydrates July 30, 2009 - 1:38pm Addthis Statement of Dr. Ray Boswell, National Energy...

42

New NIST Database on Gas Hydrates to Aid Energy and ...  

Science Conference Proceedings (OSTI)

New NIST Database on Gas Hydrates to Aid Energy and Climate Research. For Immediate Release: October 6, 2009. ...

2012-10-15T23:59:59.000Z

43

Drilling Through Gas Hydrates Formations: Managing Wellbore Stability Risks  

E-Print Network (OSTI)

As hydrocarbon exploration and development moves into deeper water and onshore arctic environments, it becomes increasingly important to quantify the drilling hazards posed by gas hydrates. To address these concerns, a 1D semi-analytical model for heat and fluid transport in the reservoir was coupled with a numerical model for temperature distribution along the wellbore. This combination allowed the estimation of the dimensions of the hydratebearing layer where the initial pressure and temperature can dynamically change while drilling. These dimensions were then used to build a numerical reservoir model for the simulation of the dissociation of gas hydrate in the layer. The bottomhole pressure (BHP) and formation properties used in this workflow were based on a real field case. The results provide an understanding of the effects of drilling through hydratebearing sediments and of the impact of drilling fluid temperature and BHP on changes in temperature and pore pressure within the surrounding sediments. It was found that the amount of gas hydrate that can dissociate will depend significantly on both initial formation characteristics and bottomhole conditions, namely mud temperature and pressure. The procedure outlined suggested in this work can provide quantitative results of the impact of hydrate dissociation on wellbore stability, which can help better design drilling muds for ultra deep water operations.

Khabibullin, Tagir R.

2010-08-01T23:59:59.000Z

44

Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluation of Technology and Potential  

E-Print Network (OSTI)

Mallik Gas Hydrate Production Research Program, Northwestof Depressurization for Gas Production from Gas Hydrate5L-38 Gas Hydrate Thermal Production Test Through Numerical

Moridis, George J.

2008-01-01T23:59:59.000Z

45

Natural gas hydrates on the North Slope of Alaska  

SciTech Connect

Gas hydrates are crystalline substances composed of water and gas, mainly methane, in which a solid-water lattice accommodates gas molecules in a cage-like structure, or clathrate. These substances often have been regarded as a potential (unconventional) source of natural gas. Significant quantities of naturally occurring gas hydrates have been detected in many regions of the Arctic including Siberia, the Mackenzie River Delta, and the North Slope of Alaska. On the North Slope, the methane-hydrate stability zone is areally extensive beneath most of the coastal plain province and has thicknesses as great as 1000 meters in the Prudhoe Bay area. Gas hydrates have been identified in 50 exploratory and production wells using well-log responses calibrated to the response of an interval in one well where gas hydrates were recovered in a core by ARCO Alaska and EXXON. Most of these gas hydrates occur in six laterally continuous Upper Cretaceous and lower Tertiary sandstone and conglomerate units; all these gas hydrates are geographically restricted to the area overlying the eastern part of the Kuparuk River Oil Field and the western part of the Prudhoe Bay Oil Field. The volume of gas within these gas hydrates is estimated to be about 1.0 {times} 10{sup 12} to 1.2 {times} 10{sup 12} cubic meters (37 to 44 trillion cubic feet), or about twice the volume of conventional gas in the Prudhoe Bay Field. Geochemical analyses of well samples suggest that the identified hydrates probably contain a mixture of deep-source thermogenic gas and shallow microbial gas that was either directly converted to gas hydrate or first concentrated in existing traps and later converted to gas hydrate. The thermogenic gas probably migrated from deeper reservoirs along the same faults thought to be migration pathways for the large volumes of shallow, heavy oil that occur in this area. 51 refs., 11 figs., 3 tabs.

Collett, T.S.

1991-01-01T23:59:59.000Z

46

NETL: Methane Hydrates - DOE/NETL Projects - Natural Gas Hydrates in  

NLE Websites -- All DOE Office Websites (Extended Search)

The National Methane Hydrates R&D Program The National Methane Hydrates R&D Program DOE/NETL Methane Hydrate Projects Natural Gas Hydrates in Permafrost and Marine Settings: Resources, Properties, and Environmental Issues Last Reviewed 12/30/2013 DE-FE0002911 Goal The objective of this DOE-USGS Interagency Agreement is to provide world-class expertise and research in support of the goals of the 2005 Energy Act for National Methane Hydrates R&D, the DOE-led U.S. interagency roadmap for gas hydrates research, and elements of the USGS mission related to energy resources, global climate, and geohazards. This project extends USGS support to the DOE Methane Hydrate R&D Program previously conducted under DE-AI26-05NT42496. Performer U.S. Geological Survey at Woods Hole, MA, Denver, CO, and Menlo Park, CA

47

Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluation of Technology and Potential  

E-Print Network (OSTI)

www.netl.doe.gov/technologies/oil-gas/publications/Hydrates/Exploration priorities for marine gas hydrates, Fire In Thewww.netl.doe.gov/technologies/oil-gas/publications/Hydrates/

Moridis, George J.

2008-01-01T23:59:59.000Z

48

An Integrated Study Method For Exploration Of Gas Hydrate Reservoirs...  

Open Energy Info (EERE)

Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon An Integrated Study Method For Exploration Of Gas Hydrate Reservoirs In Marine Areas Jump to:...

49

ŤCharacterizing Natural Gas Hydrates in the Deep Water Gulf...  

NLE Websites -- All DOE Office Websites (Extended Search)

Natural Gas Hydrates in the Deep Water Gulf of Mexico: Applications for Safe Exploration and Production Activities Semi-Annual Report" Report Type: Semi-Annual No:...

50

Swapping Global Warming Gases for Methane in Gas Hydrate ...  

Science Conference Proceedings (OSTI)

Swapping Global Warming Gases for Methane in Gas Hydrate Layer ... would serve as energy sources as well as carbon dioxide storage sites in the ...

2006-07-20T23:59:59.000Z

51

Development of Alaskan gas hydrate resources. Final report  

Science Conference Proceedings (OSTI)

The research undertaken in this project pertains to study of various techniques for production of natural gas from Alaskan gas hydrates such as, depressurization, injection of hot water, steam, brine, methanol and ethylene glycol solutions through experimental investigation of decomposition characteristics of hydrate cores. An experimental study has been conducted to measure the effective gas permeability changes as hydrates form in the sandpack and the results have been used to determine the reduction in the effective gas permeability of the sandpack as a function of hydrate saturation. A user friendly, interactive, menu-driven, numerical difference simulator has been developed to model the dissociation of natural gas hydrates in porous media with variable thermal properties. A numerical, finite element simulator has been developed to model the dissociation of hydrates during hot water injection process.

Kamath, V.A.; Sharma, G.D.; Patil, S.L.

1991-06-01T23:59:59.000Z

52

NETL: Methane Hydrates - Barrow Gas Fields - North Slope Borough, Alaska  

NLE Websites -- All DOE Office Websites (Extended Search)

Phase 2- Drilling and Production Testing the Methane Hydrate Resource Potential associated with the Barrow Gas Fields Last Reviewed 04/06/2010 Phase 2- Drilling and Production Testing the Methane Hydrate Resource Potential associated with the Barrow Gas Fields Last Reviewed 04/06/2010 DE-FC26-06NT42962 Goal The goal of this project is to evaluate, design, drill, log, core and production test methane hydrate resources in the Barrow Gas Fields near Barrow, Alaska to determine its impact on future free gas production and its viability as an energy source. Photo of Barrow welcome sign Performers North Slope Borough, Barrow, Alaska 99723 Petrotechnical Resources Alaska (PRA), Fairbanks, AK 99775 University of Alaska Fairbanks, Fairbanks, AK 99775 Background Phase 1 of the Barrow Gas Fields Hydrate Study provided very strong evidence for the existence of hydrates updip of the East Barrow and Walakpa Gas Fields. Full-field history matched reservoir modeling supported the

53

Occurrence of gas hydrate in Oligocene Frio sand: Alaminos Canyon Block 818: Northern Gulf of Mexico  

E-Print Network (OSTI)

and quantification of gas hydrates using rock physics andAdvances in the Study of Gas Hydrates. Kluwer, New York, pp.2008. Fracture-controlled gas hydrate systems in the Gulf of

Boswell, R.D.

2010-01-01T23:59:59.000Z

54

Challenges, uncertainties and issues facing gas production from gas hydrate deposits  

E-Print Network (OSTI)

gas such as tight gas, shale gas, or coal bed methane gas tolocation. Development of shale oil and gas, tar sands, coalGas hydrates will undoubtedly also be present in shales,

Moridis, G.J.

2011-01-01T23:59:59.000Z

55

NETL: Methane Hydrates - DOE/NETL Projects - Natural Gas Hydrates in  

NLE Websites -- All DOE Office Websites (Extended Search)

Natural Gas Hydrates in Permafrost and Marine Settings: Resources, Properties, and Environmental Issues Last Reviewed 12/30/2013 Natural Gas Hydrates in Permafrost and Marine Settings: Resources, Properties, and Environmental Issues Last Reviewed 12/30/2013 DE-FE0002911 Goal The objective of this DOE-USGS Interagency Agreement is to provide world-class expertise and research in support of the goals of the 2005 Energy Act for National Methane Hydrates R&D, the DOE-led U.S. interagency roadmap for gas hydrates research, and elements of the USGS mission related to energy resources, global climate, and geohazards. This project extends USGS support to the DOE Methane Hydrate R&D Program previously conducted under DE-AI26-05NT42496. Performer U.S. Geological Survey at Woods Hole, MA, Denver, CO, and Menlo Park, CA Background The USGS Interagency Agreement (IA) involves laboratory research and

56

Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluation of Technology and Potential  

E-Print Network (OSTI)

gas hydrate concentrations previously unseen in shale-gas hydrate, generally found encased in fine-grained muds and shales.

Moridis, George J.

2008-01-01T23:59:59.000Z

57

Gas Hydrate: A Realistic Future Source of Gas Supply? | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Gas Hydrate: A Realistic Future Source of Gas Supply? Gas Hydrate: A Realistic Future Source of Gas Supply? Gas Hydrate: A Realistic Future Source of Gas Supply? August 24, 2009 - 1:00pm Addthis Washington, D.C - A Department of Energy scientist writes in this week's Science magazine that a search is underway for a potentially immense untapped energy resource that, given its global distribution, has the potential to alter existing energy production and supply paradigms. In the article, Is Gas Hydrate Energy Within Reach?, Dr. Ray Boswell, technology manager for the Office of Fossil Energy's National Energy Technology Laboratory methane hydrates program, discusses recent findings and new research approaches that are clarifying gas hydrates energy potential. Driving the current interest in gas hydrate resource appraisal is the focus

58

Gas Hydrate: A Realistic Future Source of Gas Supply? | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Gas Hydrate: A Realistic Future Source of Gas Supply? Gas Hydrate: A Realistic Future Source of Gas Supply? Gas Hydrate: A Realistic Future Source of Gas Supply? August 24, 2009 - 1:00pm Addthis Washington, D.C - A Department of Energy scientist writes in this week's Science magazine that a search is underway for a potentially immense untapped energy resource that, given its global distribution, has the potential to alter existing energy production and supply paradigms. In the article, Is Gas Hydrate Energy Within Reach?, Dr. Ray Boswell, technology manager for the Office of Fossil Energy's National Energy Technology Laboratory methane hydrates program, discusses recent findings and new research approaches that are clarifying gas hydrates energy potential. Driving the current interest in gas hydrate resource appraisal is the focus

59

Gas Production From a Cold, Stratigraphically Bounded Hydrate Deposit at the Mount Elbert Site, North Slope, Alaska  

E-Print Network (OSTI)

Mallik 2002 Gas Hydrate Production Research Well Program,Of Methane Hydrate Production Methods To Reservoirs WithNumerical Studies of Gas Production From Methane Hydrates,

Moridis, G.J.

2010-01-01T23:59:59.000Z

60

Rapid Gas Hydrate Formation Processes: Will They Work?  

SciTech Connect

Researchers at DOE’s National Energy Technology Laboratory (NETL) have been investigating the formation of synthetic gas hydrates, with an emphasis on rapid and continuous hydrate formation techniques. The investigations focused on unconventional methods to reduce dissolution, induction, nucleation and crystallization times associated with natural and synthetic hydrates studies conducted in the laboratory. Numerous experiments were conducted with various high-pressure cells equipped with instrumentation to study rapid and continuous hydrate formation. The cells ranged in size from 100 mL for screening studies to proof-of-concept studies with NETL’s 15-Liter Hydrate Cell. Results from this work demonstrate that the rapid and continuous formation of methane hydrate is possible at predetermined temperatures and pressures within the stability zone of a Methane Hydrate Stability Curve (see Figure 1).

Brown, T.D.; Taylor, C.E.; Bernardo, M.P.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Modeling the interactions between poly(n-vinylpyrrolidone) and gas hydrates: factors involved in suppressing and accelerating hydrate growth  

Science Conference Proceedings (OSTI)

Gas hydrates represent both a bane and a potential boon to the oil and gas industry, and considerable research into hydrate formation has been undertaken. We have recently developed a multi-threaded version of a Monte Carlo crystal growth algorithm and ... Keywords: Monte Carlo simulations, PVP, gas hydrates, parallel computing

Brent Wathen; Peter Kwan; Zongchao Jia; Virginia K. Walker

2009-06-01T23:59:59.000Z

62

Challenges, uncertainties and issues facing gas production from gas hydrate deposits  

E-Print Network (OSTI)

focus of GH exploration and production studies in northernoil and gas exploration and production activities; includingGas hydrate exploration and production activities will be

Moridis, G.J.

2011-01-01T23:59:59.000Z

63

NETL: Methane Hydrates - DOE/NETL Projects - Estimate Gas-Hydrate  

NLE Websites -- All DOE Office Websites (Extended Search)

Electrical Resistivity Investigation of Gas Hydrate Distribution in Mississippi Canyon Block 118, Gulf of Mexico Last Reviewed 6/14/2013 Electrical Resistivity Investigation of Gas Hydrate Distribution in Mississippi Canyon Block 118, Gulf of Mexico Last Reviewed 6/14/2013 DE-FC26-06NT42959 Goal The goal of this project is to evaluate the direct-current electrical resistivity (DCR) method for remotely detecting and characterizing the concentration of gas hydrates in the deep marine environment. This will be accomplished by adapting existing DCR instrumentation for use on the sea floor in the deep marine environment and testing the new instrumentation at Mississippi Canyon Block 118. Performer Baylor University, Waco, TX 76798 Collaborators Advanced Geosciences Inc., Austin, TX 78726 Specialty Devices Inc., Wylie, TX 75098 Background Marine occurrences of methane hydrates are known to form in two distinct

64

Analysis of the Development of Messoyakha Gas Field: A Commercial Gas Hydrate Reservoir  

E-Print Network (OSTI)

Natural gas is an important energy source that contributes up to 25% of the total US energy reserves (DOE 2011). An increase in natural gas demand spurs further development of unconventional resources, including methane hydrate (Rajnauth 2012). Natural gas from methane hydrate has the potential to play a major role in ensuring adequate future energy supplies in the US. The worldwide volume of gas in the hydrate state has been estimated to be approximately 1.5 x 10^16 m^3 (Makogon 1984). More than 230 gas-hydrate deposits have been discovered globally. Several production technologies have been tested; however, the development of the Messoyakha field in the west Siberian basin is the only successful commercial gas-hydrate field to date. Although the presence of gas hydrates in the Messoyakha field was not a certainty, this current study determined the undeniable presence of gas hydrates in the reservoir. This study uses four models of the Messoyakha field structure and reservoir conditions and examines them based on the available geologic and engineering data. CMG STARS and IMEX software packages were used to calculate gas production from a hydrate-bearing formation on a field scale. Results of this analysis confirm the presence of gas hydrates in the Messoyakha field and also determine the volume of hydrates in place. The cumulative production from the field on January 1, 2012 is 12.9 x 10^9 m^3, and it was determined in this study that 5.4 x 10^9 m^3 was obtained from hydrates. The important issue of pressure-support mechanisms in developing a gas hydrate reservoir was also addressed in this study. Pressure-support mechanisms were investigated using different evaluation methods such as the use of gas-injection well patterns and gas/water injection using isothermal and non-isothermal simulators. Several aquifer models were examined. Simulation results showed that pressure support due to aquifer activity was not possible. Furthermore, it was shown that the water obtained from hydrates was not produced and remained in the reservoir. Results obtained from the aquifer models were confirmed by the actual water production from the field. It was shown that water from hydrates is a very strong pressure-support mechanism. Water not only remained in the reservoir, but it formed a thick water-saturated layer between the free-gas and gas-hydrate zone. Finally, thermodynamic behavior of gas hydrate decomposition was studied. Possible areas of hydrate preservation were determined. It was shown that the central top portion of the field preserved most of hydrates due to temperature reduction of hydrate decomposition.

Omelchenko, Roman 1987-

2012-12-01T23:59:59.000Z

65

NETL: Methane Hydrates - Barrow Gas Fields - North Slope Borough...  

NLE Websites -- All DOE Office Websites (Extended Search)

- Drilling and Production Testing the Methane Hydrate Resource Potential associated with the Barrow Gas Fields Last Reviewed 04062010 DE-FC26-06NT42962 Goal The goal of this...

66

NETL: Methane Hydrates - 2012 Ignik Sikumi gas hydrate field...  

NLE Websites -- All DOE Office Websites (Extended Search)

Project Performers ConocoPhillips Company, Houston TX and Anchorage AK ConocoPhillips Japan Oil, Gas and Metals National Corporation (JOGMEC), Japan JOGMEC...

67

NETL: Methane Hydrates - Gas Hydrate Research in Deep Sea Sediments...  

NLE Websites -- All DOE Office Websites (Extended Search)

Biogeochemistry Section, Naval Research Laboratory, Washington, D.C. 20375 Background Methane is a potent greenhouse gas necessitating a better understanding of the mechanisms...

68

NETL: Methane Hydrates - 2012 Ignik Sikumi gas hydrate field...  

NLE Websites -- All DOE Office Websites (Extended Search)

fluid, by flowmeters in the Low-flow Gas Measurement Skid. Compositional analysis of methane, nitrogen, carbon dioxide, and tracers pumped during injection are being monitored...

69

Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluation of Technology and Potential  

E-Print Network (OSTI)

Hydrate; V: Vapor (gas phase); I: Ice; Q 1 : Quadruple pointof the solid phases (hydrate and ice) as tantamount to thealong the 3-phase (aqueous + hydrate + gas, or ice + hydrate

Moridis, George J.

2008-01-01T23:59:59.000Z

70

Dynamic behavior of hydration water in calcium-silicate-hydrate gel: A quasielastic neutron scattering spectroscopy investigation  

E-Print Network (OSTI)

The translational dynamics of hydration water confined in calcium-silicate-hydrate (C-S-H) gel was studied by quasielastic neutron scattering spectroscopy in the temperature range from 280 to 230 K. The stretch exponent ...

Li, Hua

71

The effect of reservoir heterogeneity on gas production from hydrate accumulations in the permafrost  

SciTech Connect

The quantity of hydrocarbon gases trapped in natural hydrate accumulations is enormous, leading to significant interest in the evaluation of their potential as an energy source. Large volumes of gas can be readily produced at high rates for long times from methane hydrate accumulations in the permafrost by means of depressurization-induced dissociation combined with conventional technologies and horizontal or vertical well configurations. Initial studies on the possibility of natural gas production from permafrost hydrates assumed homogeneity in intrinsic reservoir properties and in the initial condition of the hydrate-bearing layers (either due to the coarseness of the model or due to simplifications in the definition of the system). These results showed great promise for gas recovery from Class 1, 2, and 3 systems in the permafrost. This work examines the consequences of inevitable heterogeneity in intrinsic properties, such as in the porosity of the hydrate-bearing formation, or heterogeneity in the initial state of hydrate saturation. Heterogeneous configurations are generated through multiple methods: (1) through defining heterogeneous layers via existing well-log data, (2) through randomized initialization of reservoir properties and initial conditions, and (3) through the use of geostatistical methods to create heterogeneous fields that extrapolate from the limited data available from cores and well-log data. These extrapolations use available information and established geophysical methods to capture a range of deposit properties and hydrate configurations. The results show that some forms of heterogeneity, such as horizontal stratification, can assist in production of hydrate-derived gas. However, more heterogeneous structures can lead to complex physical behavior within the deposit and near the wellbore that may obstruct the flow of fluids to the well, necessitating revised production strategies. The need for fine discretization is crucial in all cases to capture dynamic behavior during production.

Reagan, M. T.; Kowalsky, M B.; Moridis, G. J.; Silpngarmlert, S.

2010-05-01T23:59:59.000Z

72

Calculation of gas hydrate dissociation with finite-element model  

SciTech Connect

In situ gas hydrates have been found abundantly in the Arctic regions of the US, Canada, and Russia. Gas recovery from such a hydrate reservoir under permafrost conditions is described in the present paper. The technique is based upon a finite-element transient heat-conduction model that includes the ability to handle phase change. That model is applied to field data available from the North Slope of Alaska for predicting natural-gas production. Parametric studies have also been conducted to explore the effects of hydrate zone thickness, wellbore temperature, wellbore radius, porosity, etc., on the gas production rate. Comparisons of temperature distributions throughout the medium, and the propagation of the moving dissociation front with respect to time predicted by the present scheme and a finite-difference scheme, show good agreement. The data generated in the present study may be useful in deciding on the most optimal technique for gas recovery from hydrates. Additionally, it may provide drilling engineers with valuable information to establish guidelines for safe drilling in the presence of hydrates.

Das, D.K.; Srivastava, V. (Univ. of Alaska, Fairbanks, AK (United States). Mechanical Engineering Dept.)

1993-12-01T23:59:59.000Z

73

Challenges, uncertainties and issues facing gas production from gas hydrate deposits  

SciTech Connect

The current paper complements the Moridis et al. (2009) review of the status of the effort toward commercial gas production from hydrates. We aim to describe the concept of the gas hydrate petroleum system, to discuss advances, requirement and suggested practices in gas hydrate (GH) prospecting and GH deposit characterization, and to review the associated technical, economic and environmental challenges and uncertainties, including: the accurate assessment of producible fractions of the GH resource, the development of methodologies for identifying suitable production targets, the sampling of hydrate-bearing sediments and sample analysis, the analysis and interpretation of geophysical surveys of GH reservoirs, well testing methods and interpretation of the results, geomechanical and reservoir/well stability concerns, well design, operation and installation, field operations and extending production beyond sand-dominated GH reservoirs, monitoring production and geomechanical stability, laboratory investigations, fundamental knowledge of hydrate behavior, the economics of commercial gas production from hydrates, and the associated environmental concerns.

Moridis, G.J.; Collett, T.S.; Pooladi-Darvish, M.; Hancock, S.; Santamarina, C.; Boswell, R.; Kneafsey, T.; Rutqvist, J.; Kowalsky, M.; Reagan, M.T.; Sloan, E.D.; Sum, A.K.; Koh, C.

2010-11-01T23:59:59.000Z

74

Drilling through gas hydrates formations: possible problems and suggested solution  

E-Print Network (OSTI)

Gas hydrate research in the last two decades has taken various directions ranging from ways to understand the safe and economical production of this enormous resource to drilling problems. as more rigs and production platforms move into deeper waters to its environmental impact on global warming and cooling. Gas hydrates are ice-like structures of a water lattice with cavities, which contain guest gases. Gas hydrates are stable at low temperatures and high pressures. The amount of energy trapped in gas hydrates all over the world is about twice the amount found in all recoverable fossil fuels today. This research identifies the problems facing the oil and gas industry as it drills in deeper waters where gas hydrates are present and suggests solutions to some of the problems. The problems considered in this research have been approached from a drilling point of view. Hence, the parameters investigated and discussed are drilling controlled parameters. They include rate of penetration, circulation rate and drilling fluid density. The rate of penetration in offshore wells contributes largely to the final cost of the drilling process. These 3 parameters have been linked in the course of this research in order to suggest an optimum rate of penetration. The results show the rate of penetration is directly proportional to the amount of gas released when drilling through gas hydrate. As the volume of gas released increases, the problems facing the drilling rigs, drilling crew and environment is seen to increase. The results also show the extent of risk to be expected while drilling through gas hydrate formations. A chart relating the rate of penetration, circulation rate and effective mud weight was used to select the optimum drilling rate within the drilling safety window. Finally, future considerations and recommendations in order to improve the analyses presented in this work are presented. Other drilling parameters proposed for future analysis include drill bit analysis with respect to heat transfer and the impact of dissociation of gas hydrate around the wellbore and seafloor stability.

Amodu, Afolabi Ayoola

2008-08-01T23:59:59.000Z

75

Geological evolution and analysis of confirmed or suspected gas hydrate localities. Volume 5. Gas hydrates in the Russian literature. [271 references  

Science Conference Proceedings (OSTI)

This document is Volume V of a series of reports entitled ''Geological Evolution and Analysis of Confirmed or Suspected Gas Hydrate Localities.'' Volume V is an analysis of ''Gas Hydrates in the Russian Literature.'' This report presents an assessment of gas hydrate research as documented in Russian literature. It presents material that includes regional and local settings, geological history, stratigraphy, and physical properties. It provides some necessary regional and geological background of major hydrate occurrences in Russia. This report provides a better understanding of the gas hydrate phenomena in Russia and gives a detailed account of gas production history from a gas hydrate field in Siberia. It provides an important assessment of the understanding of gas hydrate deposition and production. 271 refs., 51 figs., 19 tabs.

Krason, J.; Ciesnik, M.

1985-10-01T23:59:59.000Z

76

Natural Gas Hydrates Update 2000-2002  

U.S. Energy Information Administration (EIA)

Through the National Energy Technology Laboratory's Strategic Center for Natural Gas, ... 23 Marathon's Gas Utilization Technologies page at

77

Geophysical evidence for gas hydrates in the deep water of the South Caspian Basin, Azerbaijan  

E-Print Network (OSTI)

as methane clathrates or clathrate hydrates of natural gas, these substances are similar to ice accumulations of natural gas on Earth are in the form of gas hydrates (Collett, 1994) that occur mainly offshore water, concern over the potential hazard posed by gas hydrates has become an important issue. Chev- ron

Knapp, James Howard

78

E ects of the Driving Force on the Composition of Natural Gas Hydrates  

E-Print Network (OSTI)

- ciates to yield natural gas and water. Such hydrate technology has two important characteristics: AmbientE ects of the Driving Force on the Composition of Natural Gas Hydrates Odd I. Levik(1) , Jean for storage and transport of natural gas. Storage of natural gas in the form of hydrate at elevated pressure

Gudmundsson, Jon Steinar

79

Gas production potential of disperse low-saturation hydrate accumulations in oceanic sediments  

E-Print Network (OSTI)

Page viable gas production. The overall conclusion drawnnot promising targets for gas production. Acknowledgment TheTS. Strategies for gas production from hydrate accumulations

Moridis, George J.; Sloan, E. Dendy

2006-01-01T23:59:59.000Z

80

Method and apparatus for recovering a gas from a gas hydrate located on the ocean floor  

DOE Patents (OSTI)

A method and apparatus for recovering a gas from a gas hydrate on the ocean floor includes a flexible cover, a plurality of steerable base members secured to the cover, and a steerable mining module. A suitable source for inflating the cover over the gas hydrate deposit is provided. The mining module, positioned on the gas hydrate deposit, is preferably connected to the cover by a control cable. A gas retrieval conduit or hose extends upwardly from the cover to be connected to a support ship on the ocean surface.

Wyatt, Douglas E. (Aiken, SC)

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Electrical Resistivity Investigation of Gas Hydrate Distribution in  

NLE Websites -- All DOE Office Websites (Extended Search)

10 10 Electrical Resistivity Investigation of Gas Hydrate Distribution in the Mississippi Canyon Block 118, Gulf of Mexico Submitted by: Baylor University One Bear Place, Box 97354 Waco, TX 76798 Principal Author: John A. Dunbar Prepared for: United States Department of Energy National Energy Technology Laboratory January 15, 2011 Office of Fossil Energy 1 Electrical Resistivity Investigation of Gas Hydrate Distribution in Mississippi Canyon Block 118, Gulf of Mexico Pr oject Quar ter 17 Repor t Report Type: Quarterly Starting October 1, 2010 Ending December 31, 2010 Author: John A. Dunbar Baylor University Department of Geology January 15, 2011 DOE Award Number: DE-FC26-06NT142959

82

Challenges, uncertainties and issues facing gas production from gas hydrate deposits  

E-Print Network (OSTI)

of Gas Price ($/Mscf) for Offshore Gas Hydrate StudyProceedings of the 2010 Offshore Technology Conference, 3-6Proceedings of the 2010 Offshore Technology Conference, 3-6

Moridis, G.J.

2011-01-01T23:59:59.000Z

83

Gas Hydrate Research Database and Web Dissemination Channel  

Science Conference Proceedings (OSTI)

To facilitate advances in application of technologies pertaining to gas hydrates, a United States database containing experimentally-derived information about those materials was developed. The Clathrate Hydrate Physical Property Database (NIST Standard Reference Database {number_sign} 156) was developed by the TRC Group at NIST in Boulder, Colorado paralleling a highly-successful database of thermodynamic properties of molecular pure compounds and their mixtures and in association with an international effort on the part of CODATA to aid in international data sharing. Development and population of this database relied on the development of three components of information-processing infrastructure: (1) guided data capture (GDC) software designed to convert data and metadata into a well-organized, electronic format, (2) a relational data storage facility to accommodate all types of numerical and metadata within the scope of the project, and (3) a gas hydrate markup language (GHML) developed to standardize data communications between 'data producers' and 'data users'. Having developed the appropriate data storage and communication technologies, a web-based interface for both the new Clathrate Hydrate Physical Property Database, as well as Scientific Results from the Mallik 2002 Gas Hydrate Production Research Well Program was developed and deployed at http://gashydrates.nist.gov.

Micheal Frenkel; Kenneth Kroenlein; V Diky; R.D. Chirico; A. Kazakow; C.D. Muzny; M. Frenkel

2009-09-30T23:59:59.000Z

84

Site Selection for DOE/JIP Gas Hydrate Drilling in the Northern Gulf of Mexico  

Science Conference Proceedings (OSTI)

Studies of geologic and geophysical data from the offshore of India have revealed two geologically distinct areas with inferred gas hydrate occurrences: the passive continental margins of the Indian Peninsula and along the Andaman convergent margin. The Indian National Gas Hydrate Program (NGHP) Expedition 01 was designed to study the occurrence of gas hydrate off the Indian Peninsula and along the Andaman convergent margin with special emphasis on understanding the geologic and geochemical controls on the occurrence of gas hydrate in these two diverse settings. NGHP Expedition 01 established the presence of gas hydrates in Krishna- Godavari, Mahanadi and Andaman basins. The expedition discovered one of the richest gas hydrate accumulations yet documented (Site 10 in the Krishna-Godavari Basin), documented the thickest and deepest gas hydrate stability zone yet known (Site 17 in Andaman Sea), and established the existence of a fully-developed gas hydrate system in the Mahanadi Basin (Site 19).

Collett, T.S. (USGS); Riedel, M. (McGill Univ., Montreal, Quebec, Canada); Cochran, J.R. (Columbia Univ., Palisades, NY); Boswell, R.M.; Kumar, Pushpendra (Oil and Natural Gas Corporation Ltd., Navi Mumbai, India); Sathe, A.V. (Oil and Natural Gas Corporation Ltd., Uttaranchal, INDIA)

2008-07-01T23:59:59.000Z

85

Simulations of Methane Hydrate Phenomena Over Geologic Timescales. Part I: Effect of Sediment Compaction Rates on Methans Hydrate and Free Gas Accumulation  

Science Conference Proceedings (OSTI)

The focus of this work is a model that describes migration and biogenic formation of methane under conditions representative of dynamic marine basins, and the conversion of soluble methane into either solid hydrate or exsolved gas. Incorporated into the overall model are an accurate phase equilibria model for seawater-methane, a methane source term based on biogenesis data, and a sediment compaction model based on porosity as a function of position, time, and the local volume fractions of hydrate solids and free gas. Simulations have shown that under some compaction scenarios, liquid overpressures reach the lithostatic limit due to permeability constraints, which can diminish the advective transfer of soluble methane within the porous sediment. As such, the formation of methane hydrate can be somewhat of a self-moderating process. The occurrence and magnitude of hydrate formation is directly tied to fundamental parameters such as the compaction/sedimentation rates, liquid advection rates, seafloor depth, geothermal gradient, etc. Results are shown for simulations covering 20 million years, wherein growth profiles for methane hydrate and free gas (neither exceeding 10 vol% at any location) are tracked within a vertical sediment column spanning over 3000 m. A case study is also presented for the Blake Ridge region (Ocean Drilling Program Leg 164, Sites 994, 995, and 997) based on simulations covering 6 Ma, wherein it is concluded that methane migration from compaction-driven advection may account for 15-30% of the total hydrate mass present in this region.

Gering, Kevin Leslie

2003-01-01T23:59:59.000Z

86

Evaluation of the gas production economics of the gas hydrate cyclic thermal injection model  

SciTech Connect

The objective of the work performed under this directive is to assess whether gas hydrates could potentially be technically and economically recoverable. The technical potential and economics of recovering gas from a representative hydrate reservoir will be established using the cyclic thermal injection model, HYDMOD, appropriately modified for this effort, integrated with economics model for gas production on the North Slope of Alaska, and in the deep offshore Atlantic. The results from this effort are presented in this document. In Section 1, the engineering cost and financial analysis model used in performing the economic analysis of gas production from hydrates -- the Hydrates Gas Economics Model (HGEM) -- is described. Section 2 contains a users guide for HGEM. In Section 3, a preliminary economic assessment of the gas production economics of the gas hydrate cyclic thermal injection model is presented. Section 4 contains a summary critique of existing hydrate gas recovery models. Finally, Section 5 summarizes the model modification made to HYDMOD, the cyclic thermal injection model for hydrate gas recovery, in order to perform this analysis.

Kuuskraa, V.A.; Hammersheimb, E.; Sawyer, W.

1985-05-01T23:59:59.000Z

87

Mechanisms Leading to Co-Existence of Gas Hydrate in Ocean Sediments  

Science Conference Proceedings (OSTI)

In this project we have sought to explain the co-existence of gas and hydrate phases in sediments within the gas hydrate stability zone. We have focused on the gas/brine interface at the scale of individual grains in the sediment. The capillary forces associated with a gas/brine interface play a dominant role in many processes that occur in the pores of sediments and sedimentary rocks. The mechanical forces associated with the same interface can lead to fracture initiation and propagation in hydrate-bearing sediments. Thus the unifying theme of the research reported here is that pore scale phenomena are key to understanding large scale phenomena in hydrate-bearing sediments whenever a free gas phase is present. Our analysis of pore-scale phenomena in this project has delineated three regimes that govern processes in which the gas phase pressure is increasing: fracturing, capillary fingering and viscous fingering. These regimes are characterized by different morphology of the region invaded by the gas. On the other hand when the gas phase pressure is decreasing, the corresponding regimes are capillary fingering and compaction. In this project, we studied all these regimes except compaction. Many processes of interest in hydrate-bearing sediments can be better understood when placed in the context of the appropriate regime. For example, hydrate formation in sub-permafrost sediments falls in the capillary fingering regime, whereas gas invasion into ocean sediments is likely to fall into the fracturing regime. Our research provides insight into the mechanisms by which gas reservoirs are converted to hydrate as the base of the gas hydrate stability zone descends through the reservoir. If the reservoir was no longer being charged, then variation in grain size distribution within the reservoir explain hydrate saturation profiles such as that at Mt. Elbert, where sand-rich intervals containing little hydrate are interspersed between intervals containing large hydrate saturations. Large volumes (of order one pore volume) of gaseous and aqueous phases must be transported into the gas hydrate stability zone. The driver for this transport is the pressure sink induced by a reduction in occupied pore volume that accompanies the formation of hydrate from gas and water. Pore-scale imbibition models and bed-scale multiphase flow models indicate that the rate-limiting step in converting gas to hydrate is the supply of water to the hydrate stability zone. Moreover, the water supply rate is controlled by capillarity-driven flux for conditions typical of the Alaska North Slope. A meter-scale laboratory experiment confirms that significant volumes of fluid phases move into the hydrate stability zone and that capillarity is essential for the water flux. The model shows that without capillarity-driven flux, large saturations of hydrate cannot form. The observations of thick zones of large saturation at Mallik and Mt Elbert thus suggest that the primary control on these systems is the rate of transport of gaseous and aqueous phases, driven by the pressure sink at the base of the gas hydrate stability zone. A key finding of our project is the elucidation of “capillary fracturing” as a dominant gas transport mechanism in low-permeability media. We initially investigate this phenomenon by means of grain-scale simulations in which we extended a discrete element mechanics code (PFC, by Itasca) to incorporate the dynamics of first single-phase and then multiphase flow. A reductionist model on a square lattice allows us to determine some of the fundamental dependencies of the mode of gas invasion (capillary fingering, viscous fingering, and fracturing) on the parameters of the system. We then show that the morphology of the gas-invaded region exerts a fundamental control on the fabric of methane hydrate formation, and on the overpressures caused by methane hydrate dissociation. We demonstrate the existence of the different invasion regimes by means of controlled laboratory experiments in a radial cell. We collapse the behavior in the form of a phas

Bryant, Steven; Juanes, Ruben

2011-12-31T23:59:59.000Z

88

Mechanisms Leading to Co-Existence of Gas Hydrate in Ocean Sediments  

SciTech Connect

In this project we have sought to explain the co-existence of gas and hydrate phases in sediments within the gas hydrate stability zone. We have focused on the gas/brine interface at the scale of individual grains in the sediment. The capillary forces associated with a gas/brine interface play a dominant role in many processes that occur in the pores of sediments and sedimentary rocks. The mechanical forces associated with the same interface can lead to fracture initiation and propagation in hydrate-bearing sediments. Thus the unifying theme of the research reported here is that pore scale phenomena are key to understanding large scale phenomena in hydrate-bearing sediments whenever a free gas phase is present. Our analysis of pore-scale phenomena in this project has delineated three regimes that govern processes in which the gas phase pressure is increasing: fracturing, capillary fingering and viscous fingering. These regimes are characterized by different morphology of the region invaded by the gas. On the other hand when the gas phase pressure is decreasing, the corresponding regimes are capillary fingering and compaction. In this project, we studied all these regimes except compaction. Many processes of interest in hydrate-bearing sediments can be better understood when placed in the context of the appropriate regime. For example, hydrate formation in sub-permafrost sediments falls in the capillary fingering regime, whereas gas invasion into ocean sediments is likely to fall into the fracturing regime. Our research provides insight into the mechanisms by which gas reservoirs are converted to hydrate as the base of the gas hydrate stability zone descends through the reservoir. If the reservoir was no longer being charged, then variation in grain size distribution within the reservoir explain hydrate saturation profiles such as that at Mt. Elbert, where sand-rich intervals containing little hydrate are interspersed between intervals containing large hydrate saturations. Large volumes (of order one pore volume) of gaseous and aqueous phases must be transported into the gas hydrate stability zone. The driver for this transport is the pressure sink induced by a reduction in occupied pore volume that accompanies the formation of hydrate from gas and water. Pore-scale imbibition models and bed-scale multiphase flow models indicate that the rate-limiting step in converting gas to hydrate is the supply of water to the hydrate stability zone. Moreover, the water supply rate is controlled by capillarity-driven flux for conditions typical of the Alaska North Slope. A meter-scale laboratory experiment confirms that significant volumes of fluid phases move into the hydrate stability zone and that capillarity is essential for the water flux. The model shows that without capillarity-driven flux, large saturations of hydrate cannot form. The observations of thick zones of large saturation at Mallik and Mt Elbert thus suggest that the primary control on these systems is the rate of transport of gaseous and aqueous phases, driven by the pressure sink at the base of the gas hydrate stability zone. A key finding of our project is the elucidation of “capillary fracturing” as a dominant gas transport mechanism in low-permeability media. We initially investigate this phenomenon by means of grain-scale simulations in which we extended a discrete element mechanics code (PFC, by Itasca) to incorporate the dynamics of first singlephase and then multiphase flow. A reductionist model on a square lattice allows us to determine some of the fundamental dependencies of the mode of gas invasion (capillary fingering, viscous fingering, and fracturing) on the parameters of the system. We then show that the morphology of the gas-invaded region exerts a fundamental control on the fabric of methane hydrate formation, and on the overpressures caused by methane hydrate dissociation. We demonstrate the existence of the different invasion regimes by means of controlled laboratory experiments in a radial cell. We collapse the behavior in the form of a phase

Bryant, Steven; Juanes, Ruben

2011-12-31T23:59:59.000Z

89

Driving force and composition for multicomponent gas hydrate nucleation from supersaturated aqueous solutions  

E-Print Network (OSTI)

Driving force and composition for multicomponent gas hydrate nucleation from supersaturated aqueous.1063/1.1817999 I. INTRODUCTION Gas hydrate crystallization from mixtures of natural gases and water is of interest for both the prevention of hy- drate formation in natural gas production and for promotion of hydration

Firoozabadi, Abbas

90

Gas Production from Hydrate-Bearing Sediments - Emergent Phenomena -  

SciTech Connect

Even a small fraction of fine particles can have a significant effect on gas production from hydrate-bearing sediments and sediment stability. Experiments were conducted to investigate the role of fine particles on gas production using a soil chamber that allows for the application of an effective stress to the sediment. This chamber was instrumented to monitor shear-wave velocity, temperature, pressure, and volume change during CO{sub 2} hydrate formation and gas production. The instrumented chamber was placed inside the Oak Ridge National Laboratory Seafloor Process Simulator (SPS), which was used to control the fluid pressure and temperature. Experiments were conducted with different sediment types and pressure-temperature histories. Fines migrated within the sediment in the direction of fluid flow. A vuggy structure formed in the sand; these small cavities or vuggs were precursors to the development of gas-driven fractures during depressurization under a constant effective stress boundary condition. We define the critical fines fraction as the clay-to-sand mass ratio when clays fill the pore space in the sand. Fines migration, clogging, vugs, and gas-driven fracture formation developed even when the fines content was significantly lower than the critical fines fraction. These results show the importance of fines in gas production from hydrate-bearing sediments, even when the fines content is relatively low.

Jung, J.W. [Georgia Institute of Technology; Jang, J.W. [Georgia Institute of Technology; Tsouris, Costas [ORNL; Phelps, Tommy Joe [ORNL; Rawn, Claudia J [ORNL; Santamarina, Carlos [Georgia Institute of Technology

2012-01-01T23:59:59.000Z

91

Natural gas production from hydrate dissociation: An axisymmetric model  

Science Conference Proceedings (OSTI)

This paper describes an axisymmetric model for natural gas production from the dissociation of methane hydrate in a confined reservoir by a depressurizing well. During the hydrate dissociation, heat and mass transfer in the reservoir are analyzed. The system of governing equations is solved by a finite difference scheme. For different well pressures and reservoir temperatures, distributions of temperature and pressure in the reservoir, as well as the natural gas production from the well are evaluated. The numerical results are compared with those obtained by a linearization method. It is shown that the gas production rate is a sensitive function of well pressure. The simulation results are compared with the linearization approach and the shortcomings of the earlier approach are discussed.

Ahmadi, G. (Clarkson Univ., Pottsdam, NY); Ji, Chuang (Clarkson Univ., Pottsdam, NY); Smith, D.H.

2007-08-01T23:59:59.000Z

92

Dynamics of biopolymers and their hydration water studied by neutron and X-ray scattering  

E-Print Network (OSTI)

Protein functions are intimately related to their dynamics. Moreover, protein hydration water is believed to have significant influence on the dynamics of proteins. One of the evidence is that both protein and its hydration ...

Chu, Xiang-qiang

2010-01-01T23:59:59.000Z

93

Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluation of Technology and Potential  

E-Print Network (OSTI)

history of the Messoyakha field demonstrates that gas hydrates are a readily producible source of natural

Moridis, George J.

2008-01-01T23:59:59.000Z

94

Ground movements associated with gas hydrate production. Final report  

SciTech Connect

This report deals with a study directed towards a modeling effort on production related ground movements and subsidence resulting from hydrate dissociation. The goal of this research study was to evaluate whether there could be subsidence related problems that could be an impediment to hydrate production. During the production of gas from a hydrate reservoir, it is expected that porous reservoir matrix becomes more compressible which may cause reservoir compression (compaction) under the influence of overburden weight. The overburden deformations can propagate its influence upwards causing subsidence near the surface where production equipment will be located. In the present study, the reservoir compaction is modeled by using the conventional ``stress equilibrium`` approach. In this approach, the overburden strata move under the influence of body force (i.e. self weight) in response to the ``cavity`` generated by reservoir depletion. The present study is expected to provide a ``lower bound`` solution to the subsidence caused by hydrate reservoir depletion. The reservoir compaction anticipated during hydrate production was modeled by using the finite element method, which is a powerful computer modeling technique. The ground movements at the reservoir roof (i.e. reservoir compression) cause additional stresses and disturbance in the overburden strata. In this study, the reservoir compaction was modeled by using the conventional ``stress equilibrium`` approach. In this approach, the overburden strata move under the influence of body force (i.e. self weight) in response to the ``cavity`` generated by reservoir depletion. The resulting stresses and ground movements were computed by using the finite element method. Based on the parameters used in this investigation, the maximum ground subsidence could vary anywhere from 0.50 to 6.50 inches depending on the overburden depth and the size of the depleted hydrate reservoir.

Siriwardane, H.J.; Kutuk, B.

1992-03-01T23:59:59.000Z

95

Occurrence of gas hydrate in Oligocene Frio sand: Alaminos Canyon Block 818: Northern Gulf of Mexico  

E-Print Network (OSTI)

hydrate systems in the Gulf of Mexico. Marine and Petroleumof the northern Gulf of Mexico gas-hydrate-stability zone.Cold seeps of the deep Gulf of Mexico: community structure

Boswell, R.D.

2010-01-01T23:59:59.000Z

96

GEOTECHNICAL INVESTIGATION CHEVRON GULF OF MEXICO GAS HYDRATES JIP  

NLE Websites -- All DOE Office Websites (Extended Search)

GEOTECHNICAL INVESTIGATION GEOTECHNICAL INVESTIGATION CHEVRON GULF OF MEXICO GAS HYDRATES JIP BLOCKS 13 AND 14, ATWATER VALLEY AREA BLOCK 151, KEATHLEY CANYON AREA GULF OF MEXICO RESULTS OF CORE SAMPLE ANALYSIS, STANDARD AND ADVANCED LABORATORY TESTING Report No. 0201-5081 CHEVRON TEXACO ENERGY TECHNOLOGY COMPANY Houston, Texas FUGRO-McCLELLAND MARINE GEOSCIENCES, INC. P. O. Box 740010, Houston, Texas 77274, Phone: 713-369-5600, Fax: 713-369-5570 GEOTECHNICAL INVESTIGATION CHEVRON GULF OF MEXICO GAS HYDRATES JIP BLOCKS 13 AND 14, ATWATER VALLEY AREA BLOCK 151, KEATHLEY CANYON AREA GULF OF MEXICO RESULTS OF CORE SAMPLE ANALYSIS, STANDARD AND ADVANCED LABORATORY TESTING REPORT NO. 0201-5081 Client: ChevronTexaco Energy Technology Company 1500 Louisiana St. Houston, Tx 77002

97

Electrical Resistivity Investigation of Gas Hydrate Distribution in  

NLE Websites -- All DOE Office Websites (Extended Search)

July 1 - September 30, 2011 July 1 - September 30, 2011 Electrical Resistivity Investigation of Gas Hydrate Distribution in the Mississippi Canyon Block 118, Gulf of Mexico Submitted by: Baylor University One Bear Place, Box 97354 Waco, TX 76798 Principal Author: John A. Dunbar Prepared for: United States Department of Energy National Energy Technology Laboratory October 14, 2011 Office of Fossil Energy 1 Electrical Resistivity Investigation of Gas Hydrate Distribution in Mississippi Canyon Block 118, Gulf of Mexico Pr oject Quar ter 20 Repor t Report Type: Quarterly Starting July 1, 2011 Ending September 30, 2011 Author: John A. Dunbar Baylor University Department of Geology October 14, 2011 DOE Award Number: DE-FC26-06NT142959

98

Electrical Resistivity Investigation of Gas Hydrate Distribution in  

NLE Websites -- All DOE Office Websites (Extended Search)

January 1 - March 31, 2012 January 1 - March 31, 2012 Electrical Resistivity Investigation of Gas Hydrate Distribution in the Mississippi Canyon Block 118, Gulf of Mexico Submitted by: Baylor University One Bear Place, Box 97354 Waco, TX 76798 Principal Author: John A. Dunbar Prepared for: United States Department of Energy National Energy Technology Laboratory April 18, 2012 Office of Fossil Energy 1 Electrical Resistivity Investigation of Gas Hydrate Distribution in Mississippi Canyon Block 118, Gulf of Mexico Pr oject Quar ter 22 Repor t Report Type: Quarterly Starting January 1, 2012 Ending March 31, 2012 Author: John A. Dunbar Baylor University Department of Geology April 18, 2012 DOE Award Number: DE-FC26-06NT142959

99

The Research Path to Determining the Natural Gas Supply Potential of Marine Gas Hydrates  

Science Conference Proceedings (OSTI)

A primary goal of the U.S. National Interagency Gas Hydrates R&D program is to determine the natural gas production potential of marine gas hydrates. In pursuing this goal, four primary areas of effort are being conducted in parallel. First, are wide-ranging basic scientific investigations in both the laboratory and in the field designed to advance the understanding of the nature and behavior of gas hydrate bearing sediments (GHBS). This multi-disciplinary work has wide-ranging direct applications to resource recovery, including assisting the development of exploration and production technologies through better rock physics models for GHBS and also in providing key data for numerical simulations of productivity, reservoir geomechanical response, and other phenomena. In addition, fundamental science efforts are essential to developing a fuller understanding of the role gas hydrates play in the natural environment and the potential environmental implications of gas hydrate production, a critical precursor to commercial extraction. A second area of effort is the confirmation of resource presence and viability via a series of multi-well marine drilling expeditions. The collection of data in the field is essential to further clarifying what proportion of the likely immense in-place marine gas hydrate resource exists in accumulations of sufficient quality to represent potential commercial production prospects. A third research focus area is the integration of geologic, geophysical, and geochemical field data into an effective suite of exploration tools that can support the delineation and characterization commercial gas hydrate prospects prior to drilling. The fourth primary research focus is the development and testing of well-based extraction technologies (including drilling, completion, stimulation and production) that can safely deliver commercial gas production rates from gas hydrate reservoirs in a variety of settings. Initial efforts will take advantage of the relatively favorable economics of conducting production tests in Arctic gas-hydrate bearing sandstones with the intent of translating the knowledge gained to later testing in marine sandstone reservoirs. The full and concurrent pusuit of each of these research topics is essential to the determining the future production potential of naturally-occuring gas hydrates.

Boswell, R.M.; Rose, K.K.; Baker, R.C.

2008-06-01T23:59:59.000Z

100

Integrated Geologic and Geophysical Assessment of the Eileen Gas Hydrate Accumulation, North Slope, Alaska  

SciTech Connect

Using detailed analysis and interpretation of 2-D and 3-D seismic data, along with modeling and correlation of specially processed log data, a viable methodology has been developed for identifying sub-permafrost gas hydrate prospects within the Gas Hydrate Stability Zone (HSZ) and associated ''sub-hydrate'' free gas prospects in the Milne Point area of northern Alaska (Figure 1). The seismic data, in conjunction with modeling results from a related study, was used to characterize the conditions under which gas hydrate prospects can be delineated using conventional seismic data, and to analyze reservoir fluid properties. Monte Carlo style gas hydrate volumetric estimates using Crystal Ball{trademark} software to estimate expected in-place reserves shows that the identified prospects have considerable potential as gas resources. Future exploratory drilling in the Milne Point area should provide answers about the producibility of these shallow gas hydrates.

Timothy S. Collett; David J. Taylor; Warren F. Agena; Myung W. Lee; John J. Miller; Margarita Zyrianova

2005-04-30T23:59:59.000Z

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Critically pressured free-gas reservoirs below gas-hydrate  

E-Print Network (OSTI)

; importantly, no observed gas column thickness significantly exceeds the calculated critical value (Fig. 3 complete gas evacuation3,24 . A Received 16 June; accepted 5 November 2003; doi:10.1038/nature02172. 1.............................................................. Critically pressured free-gas

Holbrook, W. Steven

102

Using Carbon Dioxide to Enhance Recovery of Methane from Gas Hydrate Reservoirs: Final Summary Report  

Science Conference Proceedings (OSTI)

Carbon dioxide sequestration coupled with hydrocarbon resource recovery is often economically attractive. Use of CO2 for enhanced recovery of oil, conventional natural gas, and coal-bed methane are in various stages of common practice. In this report, we discuss a new technique utilizing CO2 for enhanced recovery of an unconventional but potentially very important source of natural gas, gas hydrate. We have focused our attention on the Alaska North Slope where approximately 640 Tcf of natural gas reserves in the form of gas hydrate have been identified. Alaska is also unique in that potential future CO2 sources are nearby, and petroleum infrastructure exists or is being planned that could bring the produced gas to market or for use locally. The EGHR (Enhanced Gas Hydrate Recovery) concept takes advantage of the physical and thermodynamic properties of mixtures in the H2O-CO2 system combined with controlled multiphase flow, heat, and mass transport processes in hydrate-bearing porous media. A chemical-free method is used to deliver a LCO2-Lw microemulsion into the gas hydrate bearing porous medium. The microemulsion is injected at a temperature higher than the stability point of methane hydrate, which upon contacting the methane hydrate decomposes its crystalline lattice and releases the enclathrated gas. Small scale column experiments show injection of the emulsion into a CH4 hydrate rich sand results in the release of CH4 gas and the formation of CO2 hydrate

McGrail, B. Peter; Schaef, Herbert T.; White, Mark D.; Zhu, Tao; Kulkarni, Abhijeet S.; Hunter, Robert B.; Patil, Shirish L.; Owen, Antionette T.; Martin, P F.

2007-09-01T23:59:59.000Z

103

Sonic and resistivity measurements on Berea sandstone containing tetrahydrofuran hydrates: a possible analogue to natural-gas-hydrate deposits. [Tetrahydrofuran hydrates  

Science Conference Proceedings (OSTI)

Deposits of natural gas hydrates exist in arctic sedimentary basins and in marine sediments on continental slopes and rises. However, the physical properties of such sediments are largely unknown. In this paper, we report laboratory sonic and resistivity measurements on Berea sandstone cores saturated with a stoichiometric mixture of tetrahydrofuran (THF) and water. We used THF as the guest species rather than methane or propane gas because THF can be mixed with water to form a solution containing proportions of the proper stoichiometric THF and water. Because neither methane nor propane is soluble in water, mixing the guest species with water sufficiently to form solid hydrate is difficult. Because THF solutions form hydrates readily at atmospheric pressure it is an excellent experimental analogue to natural gas hydrates. Hydrate formation increased the sonic P-wave velocities from a room temperature value of 2.5 km/s to 4.5 km/s at -5/sup 0/C when the pores were nearly filled with hydrates. Lowering the temperature below -5/sup 0/C did not appreciably change the velocity however. In contrast, the electrical resistivity increases nearly two orders of magnitude upon hydrate formation and continues to increase more slowly as the temperature is further decreased. In all cases the resistivities are nearly frequency independent to 30 kHz and the loss tangents are high, always greater than 5. The dielectric loss shows a linear decrease with frequency suggesting that ionic conduction through a brine phase dominates at all frequencies, even when the pores are nearly filled with hydrates. We find that the resistivities are strongly a function of the dissolved salt content of the pore water. Pore water salinity also influences the sonic velocity, but this effect is much smaller and only important near the hydrate formation temperature.

Pearson, C.; Murphy, J.; Halleck, P.; Hermes, R.; Mathews, M.

1983-01-01T23:59:59.000Z

104

Estimation of methane flux offshore SW Taiwan and the influence of tectonics on gas hydrate accumulation  

E-Print Network (OSTI)

­510 INTRODUCTION Gas hydrates are naturally occurring solids, nonstoichio- metric clathrates, stable at relatively and in sedimentary strata of continen- tal deep sea areas and are typically composed of natural gas, mainly methane have suggested that methane concentra- tions play an important role in gas hydrate investigations. Very

Lin, Andrew Tien-Shun

105

Sources of biogenic methane to form marine gas hydrates: In situ production or upward migration?  

SciTech Connect

Potential sources of biogenic methane in the Carolina Continental Rise -- Blake Ridge sediments have been examined. Two models were used to estimate the potential for biogenic methane production: (1) construction of sedimentary organic carbon budgets, and (2) depth extrapolation of modern microbial production rates. While closed-system estimates predict some gas hydrate formation, it is unlikely that >3% of the sediment volume could be filled by hydrate from methane produced in situ. Formation of greater amounts requires migration of methane from the underlying continental rise sediment prism. Methane may be recycled from below the base of the gas hydrate stability zone by gas hydrate decomposition, upward migration of the methane gas, and recrystallization of gas hydrate within the overlying stability zone. Methane bubbles may also form in the sediment column below the depth of gas hydrate stability because the methane saturation concentration of the pore fluids decreases with increasing depth. Upward migration of methane bubbles from these deeper sediments can add methane to the hydrate stability zone. From these models it appears that recycling and upward migration of methane is essential in forming significant gas hydrate concentrations. In addition, the depth distribution profiles of methane hydrate will differ if the majority of the methane has migrated upward rather than having been produced in situ.

Paull, C.K.; Ussler, W. III; Borowski, W.S.

1993-09-01T23:59:59.000Z

106

Mechanisms Leading to Co-existence of Gas and Hydrate in Ocean Sediments  

NLE Websites -- All DOE Office Websites (Extended Search)

Leading to Co-existence of Gas Leading to Co-existence of Gas and Hydrate in Ocean Sediments Steven Bryant Dept. of Petroleum and Geosystems Engineering The University of Texas at Austin and Ruben Juanes Dept. of Civil Engineering MIT Observations and Ruminations * Some proposed explanations for co-existence - kinetics of hydrate formation; - regional geotherms; - hypersaline brines as a result of hydrate formation;

107

The Dynamic Transition of Protein Hydration Water  

E-Print Network (OSTI)

Thin layers of water on biomolecular and other nanostructured surfaces can be supercooled to temperatures not accessible with bulk water. Chen et al. [PNAS 103, 9012 (2006)] suggested that anomalies near 220 K observed by quasi-elastic neutron scattering can be explained by a hidden critical point of bulk water. Based on more sensitive measurements of water on perdeuterated phycocyanin, using the new neutron backscattering spectrometer SPHERES, and an improved data analysis, we present results that show no sign of such a fragile-to-strong transition. The inflection of the elastic intensity at 220 K has a dynamic origin that is compatible with a calorimetric glass transition at 170 K. The temperature dependence of the relaxation times is highly sensitive to data evaluation; it can be brought into perfect agreement with the results of other techniques, without any anomaly.

W. Doster; S. Busch; A. M. Gaspar; M. -S. Appavou; J. Wuttke; H. Scheer

2009-11-26T23:59:59.000Z

108

Occurrence of gas hydrate in Oligocene Frio sand: Alaminos Canyon Block 818: Northern Gulf of Mexico  

E-Print Network (OSTI)

volumes of shale (gray), sand (yellow), gas hydrate-?lledgas hydrate-bearing zone is also bounded laterally with impermeable shaleshale section that overlies the Frio sand showing four-way closure that forms the trap for the AC818 gas

Boswell, R.D.

2010-01-01T23:59:59.000Z

109

A scheme for reducing experimental heat capacity data of gas hydrates  

SciTech Connect

Experimental heat capacity data of simple gas hydrates on xenon, methane, ethane, and propane are reduced by application of classical thermodynamics and the ideal solid solution theory. It is shown that calculated heat capacities of the empty hydrate lattices of the structure 1 and 2 hydrates can be higher or lower than the heat capacity of ice. Similarly, the calculated partial molar heat capacity of the enclathrated gases are higher or lower than the corresponding experimental ideal gas heat capacity. These differences depend on the size of the guest relative to the cavity, the hydrate number, and the temperature. For estimation of the thermodynamic properties of the empty hydrate lattice, further experimental work is recommended. Within the present limitations, a consistent methodology is applied for the prediction of the heat capacity of a natural gas hydrate.

Avlonitis, D. (Aero-engines Factory, Elefsis (Greece). Division of Chemistry)

1994-12-01T23:59:59.000Z

110

NETL: Methane Hydrates - DOE/NETL Projects - GAS HYDRATE DYNAMICS...  

NLE Websites -- All DOE Office Websites (Extended Search)

the first systematic geochemical and microbiological data to constrain subseafloor methane sinks and the spatio-temporal changes in the nature of microbial systems and pore...

111

Occurrence of gas hydrate in Oligocene Frio sand: Alaminos Canyon Block 818: Northern Gulf of Mexico  

SciTech Connect

A unique set of high-quality downhole shallow subsurface well log data combined with industry standard 3D seismic data from the Alaminos Canyon area has enabled the first detailed description of a concentrated gas hydrate accumulation within sand in the Gulf of Mexico. The gas hydrate occurs within very fine grained, immature volcaniclastic sands of the Oligocene Frio sand. Analysis of well data acquired from the Alaminos Canyon Block 818 No.1 ('Tigershark') well shows a total gas hydrate occurrence 13 m thick, with inferred gas hydrate saturation as high as 80% of sediment pore space. Average porosity in the reservoir is estimated from log data at approximately 42%. Permeability in the absence of gas hydrates, as revealed from the analysis of core samples retrieved from the well, ranges from 600 to 1500 millidarcies. The 3-D seismic data reveals a strong reflector consistent with significant increase in acoustic velocities that correlates with the top of the gas-hydrate-bearing sand. This reflector extends across an area of approximately 0.8 km{sup 2} and delineates the minimal probable extent of the gas hydrate accumulation. The base of the inferred gas-hydrate zone also correlates well with a very strong seismic reflector that indicates transition into units of significantly reduced acoustic velocity. Seismic inversion analyses indicate uniformly high gas-hydrate saturations throughout the region where the Frio sand exists within the gas hydrate stability zone. Numerical modeling of the potential production of natural gas from the interpreted accumulation indicates serious challenges for depressurization-based production in settings with strong potential pressure support from extensive underlying aquifers.

Boswell, R.D.; Shelander, D.; Lee, M.; Latham, T.; Collett, T.; Guerin, G.; Moridis, G.; Reagan, M.; Goldberg, D.

2009-07-15T23:59:59.000Z

112

Site Selection for DOE/JIP Gas Hydrate Drilling in the Northern Gulf of Mexico  

Science Conference Proceedings (OSTI)

In the late spring of 2008, the Chevron-led Gulf of Mexico Gas Hydrate Joint Industry Project (JIP) expects to conduct an exploratory drilling and logging campaign to better understand gas hydrate-bearing sands in the deepwater Gulf of Mexico. The JIP Site Selection team selected three areas to test alternative geological models and geophysical interpretations supporting the existence of potential high gas hydrate saturations in reservoir-quality sands. The three sites are near existing drill holes which provide geological and geophysical constraints in Alaminos Canyon (AC) lease block 818, Green Canyon (GC) 955, and Walker Ridge (WR) 313. At the AC818 site, gas hydrate is interpreted to occur within the Oligocene Frio volcaniclastic sand at the crest of a fold that is shallow enough to be in the hydrate stability zone. Drilling at GC955 will sample a faulted, buried Pleistocene channel-levee system in an area characterized by seafloor fluid expulsion features, structural closure associated with uplifted salt, and abundant seismic evidence for upward migration of fluids and gas into the sand-rich parts of the sedimentary section. Drilling at WR313 targets ponded sheet sands and associated channel/levee deposits within a minibasin, making this a non-structural play. The potential for gas hydrate occurrence at WR313 is supported by shingled phase reversals consistent with the transition from gas-charged sand to overlying gas-hydrate saturated sand. Drilling locations have been selected at each site to 1) test geological methods and models used to infer the occurrence of gas hydrate in sand reservoirs in different settings in the northern Gulf of Mexico; 2) calibrate geophysical models used to detect gas hydrate sands, map reservoir thicknesses, and estimate the degree of gas hydrate saturation; and 3) delineate potential locations for subsequent JIP drilling and coring operations that will collect samples for comprehensive physical property, geochemical and other analyses.

Hutchinson, D.R. (USGS); Shelander, D. (Schlumberger, Houston, TX); Dai, J. (Schlumberger, Hoston, TX); McConnell, D. (AOA Geophysics, Inc., Houston, TX); Shedd, W. (Minerals Management Service); Frye, M. (Minerals Management Service); Ruppel, C. (USGS); Boswell, R.; Jones, E. (Chevron Energy Technology Corp., Houston, TX); Collett, T.S. (USGS); Rose, K.; Dugan, B. (Rice Univ., Houston, TX); Wood, W. (U.S. Naval Research Laboratory); Latham, T. (Chevron Energy Technology Corp., Houston, TX)

2008-07-01T23:59:59.000Z

113

An Integrated Study Method For Exploration Of Gas Hydrate Reservoirs In  

Open Energy Info (EERE)

Study Method For Exploration Of Gas Hydrate Reservoirs In Study Method For Exploration Of Gas Hydrate Reservoirs In Marine Areas Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: An Integrated Study Method For Exploration Of Gas Hydrate Reservoirs In Marine Areas Details Activities (0) Areas (0) Regions (0) Abstract: We propose an integrated study method for exploration of gas hydrate reservoirs in marine areas. This method combines analyses of geology, seismology, and geochemistry. First, geological analysis is made using data of material sources, structures, sediments, and geothermal regimes to determine the hydrocarbon-formation conditions of gas hydrate in marine areas. Then analyses of seismic attributes,such as BSR, AVO, and BZ as well as forward modeling are conducted to predict the potential

114

DOE Leads National Research Program in Gas Hydrates | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Leads National Research Program in Gas Hydrates Leads National Research Program in Gas Hydrates DOE Leads National Research Program in Gas Hydrates July 30, 2009 - 1:00pm Addthis Washington, DC - The U.S. Department of Energy today told Congress the agency is leading a nationwide program in search of naturally occurring natural gas hydrates - a potentially significant storehouse of methane--with far reaching implications for the environment and the nation's future energy supplies. Read Dr. Boswell's testimony Dr. Ray Boswell, Senior Management and Technology Advisor at the Office of Fossil Energy's National Energy Technology Laboratory, testified before the House Natural Resources Subcommittee on Energy and Mineral Resources that the R&D program in gas hydrates is working to integrate and leverage

115

Expedition Provides New Insight on Gas Hydrates in Gulf of Mexico |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Expedition Provides New Insight on Gas Hydrates in Gulf of Mexico Expedition Provides New Insight on Gas Hydrates in Gulf of Mexico Expedition Provides New Insight on Gas Hydrates in Gulf of Mexico May 14, 2013 - 10:00am Addthis USGS technicians Eric Moore and Jenny White deploy instruments at the start of a seismic survey to explore gas hydrates in the deepwater Gulf of Mexico from April to May 2013 | Photo courtesy of USGS USGS technicians Eric Moore and Jenny White deploy instruments at the start of a seismic survey to explore gas hydrates in the deepwater Gulf of Mexico from April to May 2013 | Photo courtesy of USGS Washington, DC - A joint-federal-agency 15-day research expedition in the northern Gulf of Mexico yielded innovative high-resolution seismic data and imagery that will help refine characterizations of large methane

116

Status of DOE Research Efforts in Gas Hydrates | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Status of DOE Research Efforts in Gas Hydrates Status of DOE Research Efforts in Gas Hydrates Status of DOE Research Efforts in Gas Hydrates July 30, 2009 - 1:38pm Addthis Statement of Dr. Ray Boswell, National Energy Technology Laboratory before the Committee on Natural Resources, Subcommittee on Energy and Mineral Resources, U.S. House of Representatives. Thank you, Mr. Chairman and Members of the Subcommittee. I appreciate this opportunity to provide testimony on the status of the United States Department of Energy's (DOE's) research efforts in naturally-occurring gas hydrates. INTRODUCTION Since 2000, DOE, through the Office of Fossil Energy's National Energy Technology Laboratory (NETL), has led the national research program in gas hydrates. The program is conducted through partnerships with private

117

NATURAL GAS HYDRATES STORAGE PROJECT PHASE II. CONCEPTUAL DESIGN AND ECONOMIC STUDY  

SciTech Connect

DOE Contract DE-AC26-97FT33203 studied feasibility of utilizing the natural-gas storage property of gas hydrates, so abundantly demonstrated in nature, as an economical industrial process to allow expanded use of the clean-burning fuel in power plants. The laboratory work achieved breakthroughs: (1) Gas hydrates were found to form orders of magnitude faster in an unstirred system with surfactant-water micellar solutions. (2) Hydrate particles were found to self-pack by adsorption on cold metal surfaces from the micellar solutions. (3) Interstitial micellar-water of the packed particles were found to continue forming hydrates. (4) Aluminum surfaces were found to most actively collect the hydrate particles. These laboratory developments were the bases of a conceptual design for a large-scale process where simplification enhances economy. In the design, hydrates form, store, and decompose in the same tank in which gas is pressurized to 550 psi above unstirred micellar solution, chilled by a brine circulating through a bank of aluminum tubing in the tank employing gas-fired refrigeration. Hydrates form on aluminum plates suspended in the chilled micellar solution. A low-grade heat source, such as 110 F water of a power plant, circulates through the tubing bank to release stored gas. The design allows a formation/storage/decomposition cycle in a 24-hour period of 2,254,000 scf of natural gas; the capability of multiple cycles is an advantage of the process. The development costs and the user costs of storing natural gas in a scaled hydrate process were estimated to be competitive with conventional storage means if multiple cycles of hydrate storage were used. If more than 54 cycles/year were used, hydrate development costs per Mscf would be better than development costs of depleted reservoir storage; above 125 cycles/year, hydrate user costs would be lower than user costs of depleted reservoir storage.

R.E. Rogers

1999-09-27T23:59:59.000Z

118

Geologic interrelations relative to gas hydrates within the North Slope of Alaska: Task No. 6, Final report  

SciTech Connect

The five primary objectives of the US Geological Survey North Slope Gas Hydrate Project were to: (1) Determine possible geologic controls on the occurrence of gas hydrate; (2) locate and evaluate possible gas-hydrate-bearing reservoirs; (3) estimate the volume of gas within the hydrates; (4) develop a model for gas-hydrate formation; and (5) select a coring site for gas-hydrate sampling and analysis. Our studies of the North Slope of Alaska suggest that the zone in which gas hydrates are stable is controlled primarily by subsurface temperatures and gas chemistry. Other factors, such as pore-pressure variations, pore-fluid salinity, and reservior-rock grain size, appear to have little effect on gas hydrate stability on the North Slope. Data necessary to determine the limits of gas hydrate stability field are difficult to obtain. On the basis of mud-log gas chromatography, core data, and cuttings data, methane is the dominant species of gas in the near-surface (0--1500 m) sediment. Gas hydrates were identified in 34 wells utilizing well-log responses calibrated to the response of an interval in one well where gas hydrates were actually recovered in a core by an oil company. A possible scenario describing the origin of the interred gas hydrates on the North Slope involves the migration of thermogenic solution- and free-gas from deeper reservoirs upward along faults into the overlying sedimentary rocks. We have identified two (dedicated) core-hole sites, the Eileen and the South-End core-holes, at which there is a high probability of recovering a sample of gas hydrate. At the Eileen core-hole site, at least three stratigraphic units may contain gas hydrate. The South-End core-hole site provides an opportunity to study one specific rock unit that appears to contain both gas hydrate and oil. 100 refs., 72 figs., 24 tabs.

Collett, T.S.; Bird, K.J.; Kvenvolden, K.A.; Magoon, L.B.

1988-01-01T23:59:59.000Z

119

Trapping and migration of methane associated with the gas hydrate stability zone at the Blake Ridge Diapir  

E-Print Network (OSTI)

on lateral variations of the BGHS and BSR. This may be important for gas hydrate studies in regions of the manuscript. References Brown, K.M., 1996. The nature, distribution, and origin of gas hydrate in the ChileTrapping and migration of methane associated with the gas hydrate stability zone at the Blake Ridge

Taylor, Michael H.

120

AN INTERNATIONAL EFFORT TO COMPARE GAS HYDRATE RESERVOIR SIMULATORS  

NLE Websites -- All DOE Office Websites (Extended Search)

AN INTERNATIONAL EFFORT TO COMPARE GAS HYDRATE RESERVOIR SIMULATORS Joseph W. Wilder 1 , George J. Moridis 2 , Scott J. Wilson 3 , Masanori Kurihara 4 , Mark D. White 5 , Yoshihiro Masuda 6 , Brian J. Anderson 7, 8 *, Timothy S. Collett 9 , Robert B. Hunter 10 , Hideo Narita 11 , Mehran Pooladi-Darvish 12 , Kelly Rose 7 , Ray Boswell 7 1 Department of Theoretical & Applied Math University of Akron 302 Buchtel Common Akron, OH 44325-4002 USA 2 Lawrence Berkeley National Laboratory, University of California Earth Sciences Division, 1 Cyclotron Rd., MS 90-1116 Berkeley, CA 94720 USA 3 Ryder Scott Company, Petroleum Consultants 621 17th Street, Suite 1550 Denver, Colorado 80293 USA 4 Japan Oil Engineering Company, Ltd. Kachidoki Sun-Square 1-7-3, Kachidoki, Chuo-ku,

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121

Scientific Objectives of the Gulf of Mexico Gas Hydrate JIP Leg II Drilling  

Science Conference Proceedings (OSTI)

The Gulf of Mexico Methane Hydrate Joint Industry Project (JIP) has been performing research on marine gas hydrates since 2001 and is sponsored by both the JIP members and the U.S. Department of Energy. In 2005, the JIP drilled the Atwater Valley and Keathley Canyon exploration blocks in the Gulf of Mexico to acquire downhole logs and recover cores in silt- and clay-dominated sediments interpreted to contain gas hydrate based on analysis of existing 3-D seismic data prior to drilling. The new 2007-2009 phase of logging and coring, which is described in this paper, will concentrate on gas hydrate-bearing sands in the Alaminos Canyon, Green Canyon, and Walker Ridge protraction areas. Locations were selected to target higher permeability, coarser-grained lithologies (e.g., sands) that have the potential for hosting high saturations of gas hydrate and to assist the U.S. Minerals Management Service with its assessment of gas hydrate resources in the Gulf of Mexico. This paper discusses the scientific objectives for drilling during the upcoming campaign and presents the results from analyzing existing seismic and well log data as part of the site selection process. Alaminos Canyon 818 has the most complete data set of the selected blocks, with both seismic data and comprehensive downhole log data consistent with the occurrence of gas hydrate-bearing sands. Preliminary analyses suggest that the Frio sandstone just above the base of the gas hydrate stability zone may have up to 80% of the available sediment pore space occupied by gas hydrate. The proposed sites in the Green Canyon and Walker Ridge areas are also interpreted to have gas hydrate-bearing sands near the base of the gas hydrate stability zone, but the choice of specific drill sites is not yet complete. The Green Canyon site coincides with a 4-way closure within a Pleistocene sand unit in an area of strong gas flux just south of the Sigsbee Escarpment. The Walker Ridge site is characterized by a sand-prone sedimentary section that rises stratigraphically across the base of the gas hydrate stability zone and that has seismic indicators of gas hydrate. Copyright 2008, Offshore Technology Conference

Jones, E. (Chevron); Latham, T. (Chevron); McConnell, D. (AOA Geophysics); Frye, M. (Minerals Management Service); Hunt, J. (Minerals Management Service); Shedd, W. (Minerals Management Service); Shelander, D. (Schlumberger); Boswell, R.M. (NETL); Rose, K.K. (NETL); Ruppel, C. (USGS); Hutchinson, D. (USGS); Collett, T. (USGS); Dugan, B. (Rice University); Wood, W. (Naval Research Laboratory)

2008-05-01T23:59:59.000Z

122

Observation of dynamic crossover and dynamic heterogeneity in hydration water confined in aged cement paste  

NLE Websites -- All DOE Office Websites (Extended Search)

502101 502101 (6pp) doi:10.1088/0953-8984/20/50/502101 FAST TRACK COMMUNICATION Observation of dynamic crossover and dynamic heterogeneity in hydration water confined in aged cement paste Y Zhang 1 , M Lagi 1,2 , F Ridi 2 , E Fratini 2 , P Baglioni 2 , E Mamontov 3 and S H Chen 1,4 1 Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA 2 Department of Chemistry and CSGI, University of Florence, Sesto Fiorentino, Florence, I-50019, Italy 3 Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA E-mail: sowhsin@mit.edu Received 24 September 2008, in final form 23 October 2008 Published 12 November 2008 Online at stacks.iop.org/JPhysCM/20/502101 Abstract High resolution quasi-elastic neutron scattering is used to investigate the slow dynamics of hydration water confined in calcium silicate hydrate

123

Evaluation of the gas production economics of the gas hydrate cyclic thermal injection model. [Cyclic thermal injection  

SciTech Connect

The objective of the work performed under this directive is to assess whether gas hydrates could potentially be technically and economically recoverable. The technical potential and economics of recovering gas from a representative hydrate reservoir will be established using the cyclic thermal injection model, HYDMOD, appropriately modified for this effort, integrated with economics model for gas production on the North Slope of Alaska, and in the deep offshore Atlantic. The results from this effort are presented in this document. In Section 1, the engineering cost and financial analysis model used in performing the economic analysis of gas production from hydrates -- the Hydrates Gas Economics Model (HGEM) -- is described. Section 2 contains a users guide for HGEM. In Section 3, a preliminary economic assessment of the gas production economics of the gas hydrate cyclic thermal injection model is presented. Section 4 contains a summary critique of existing hydrate gas recovery models. Finally, Section 5 summarizes the model modification made to HYDMOD, the cyclic thermal injection model for hydrate gas recovery, in order to perform this analysis.

Kuuskraa, V.A.; Hammersheimb, E.; Sawyer, W.

1985-05-01T23:59:59.000Z

124

Detection of Gas Hydrates in Garden Banks and Keathley Canyon from Seismic Data  

E-Print Network (OSTI)

Gas hydrate is a potential energy source that has recently been the subject of much academic and industrial research. The search for deep-water gas hydrate involves many challenges that are especially apparent in the northwestern Gulf of Mexico, where the sub-seafloor is a complex structure of shallow salt diapirs and sheets underlying heavily deformed shallow sediments and surrounding diverse minibasins. Here, we consider the effect these structural factors have on gas hydrate occurrence in Garden Banks and Keathley Canyon blocks of the Gulf of Mexico. This was accomplished by first mapping the salt and shallow deformation structures throughout the region using a 2D grid of seismic reflection data. In addition, major deep-rooted faults and shallow-rooted faults were mapped throughout the area. A shallow sediment deformation map was generated that defined areas of significant faulting. We then quantified the thermal impact of shallow salt to better estimate the gas hydrate stability zone (GHSZ) thickness. The predicted base of the GHSZ was compared to the seismic data, which showed evidence for bottom simulating reflectors and gas chimneys. These BSRs and gas chimneys were used to ground-truth the calculated depth of the base of GHSZ. Finally, the calculated GHSZ thickness was used to estimate the volume of the gas hydrate reservoir in the area after determining the most reasonable gas hydrate concentrations in sediments within the GHSZ. An estimate of 5.5 trillion cubic meters of pure hydrate methane in Garden Banks and Keathley Canyon was obtained.

Murad, Idris

2009-05-01T23:59:59.000Z

125

Natural gas hydrates of the Prudhoe Bay and Kuparuk River area, North Slope, Alaska  

SciTech Connect

Gas hydrates are crystalline substances composed of water and gas, mainly methane, in which a solid-water lattice accommodates gas molecules in a cage-like structure, or clathrate. These substances commonly have been regarded as a potential unconventional source of natural gas because of their enormous gas-storage capacity. Significant quantities of naturally occurring gas hydrates have been detected in many regions of the Arctic, including Siberia, the Mackenzie River Delta, and the North Slope of Alaska. On the North Slope, the methane-hydrate stability zone is a really extensive beneath most of the coastal plain province and has thicknesses greater than 1000 m in the Prudhoe Bay area. Gas hydrates have been inferred to occur in 50 North Slope exploratory and production wells on the basis of well-log responses calibrated to the response of an interval in a well where gas hydrates were recovered in a core by ARCO and Exxon. Most North Slope gas hydrates occur in six laterally continuous lower Tertiary sandstones and conglomerates; all these gas hydrates are geographically restricted to the area overlying the eastern part of the Kuparuk River oil field and the western part of the Prudhoe Bay oil field. The volume of gas within these gas hydrates is estimated to be about 1.0 [times] 10[sup 12] to 1.2 [times] 10[sup 12] m[sup 3] (37 to 44 tcf), or about twice the volume of conventional gas in the Prudhoe Bay field. 52 refs., 13 figs., 2 tabs.

Collett, T.S. (Geological Survey, Denver, CO (United States))

1993-05-01T23:59:59.000Z

126

Investigation of gas hydrate-bearing sandstone reservoirs at the "Mount Elbert" stratigraphic test well, Milne Point, Alaska  

SciTech Connect

In February 2007, the U.S. Department of Energy, BP Exploration (Alaska), Inc., and the U.S. Geological Survey conducted an extensive data collection effort at the "Mount Elbert #1" gas hydrates stratigraphic test well on the Alaska North Slope (ANS). The 22-day field program acquired significant gas hydrate-bearing reservoir data, including a full suite of open-hole well logs, over 500 feet of continuous core, and open-hole formation pressure response tests. Hole conditions, and therefore log data quality, were excellent due largely to the use of chilled oil-based drilling fluids. The logging program confirmed the existence of approximately 30 m of gashydrate saturated, fine-grained sand reservoir. Gas hydrate saturations were observed to range from 60% to 75% largely as a function of reservoir quality. Continuous wire-line coring operations (the first conducted on the ANS) achieved 85% recovery through 153 meters of section, providing more than 250 subsamples for analysis. The "Mount Elbert" data collection program culminated with open-hole tests of reservoir flow and pressure responses, as well as gas and water sample collection, using Schlumberger's Modular Formation Dynamics Tester (MDT) wireline tool. Four such tests, ranging from six to twelve hours duration, were conducted. This field program demonstrated the ability to safely and efficiently conduct a research-level openhole data acquisition program in shallow, sub-permafrost sediments. The program also demonstrated the soundness of the program's pre-drill gas hydrate characterization methods and increased confidence in gas hydrate resource assessment methodologies for the ANS.

Boswell, R.M.; Hunter, R. (ASRC Energy Services, Anchorage, AK); Collett, T. (USGS, Denver, CO); Digert, S. (BP Exploration (Alaska) Inc., Anchorage, AK); Hancock, S. (RPS Energy Canada, Calgary, Alberta, Canada); Weeks, M. (BP Exploration (Alaska) Inc., Anchorage, AK); Mt. Elbert Science Team

2008-01-01T23:59:59.000Z

127

Detection and evaluation methods for in-situ gas hydrates  

Science Conference Proceedings (OSTI)

With the increased interest in naturally occuring hydrates, the need for improved detection and evaluation methods has also increased. In this paper, logging of hydrates is discussed and selected logs from four arctic wells are examined. A new procedure based on temperature log analysis is described. The concept of a downhole heater for use with drill stem testing is also described for testing and evaluation of hydrate intervals. 12 refs.

Goodman, M.A.; Guissani, A.P.; Alger, R.P.

1982-01-01T23:59:59.000Z

128

Method for the photocatalytic conversion of gas hydrates  

DOE Patents (OSTI)

A method for converting methane hydrates to methanol, as well as hydrogen, through exposure to light. The process includes conversion of methane hydrates by light where a radical initiator has been added, and may be modified to include the conversion of methane hydrates with light where a photocatalyst doped by a suitable metal and an electron transfer agent to produce methanol and hydrogen. The present invention operates at temperatures below 0.degree. C., and allows for the direct conversion of methane contained within the hydrate in situ.

Taylor, Charles E. (Pittsburg, PA); Noceti, Richard P. (Pittsburg, PA); Bockrath, Bradley C. (Bethel Park, PA)

2001-01-01T23:59:59.000Z

129

NETL: Methane Hydrates - DOE/NETL Projects - Estimate Gas-Hydrate...  

NLE Websites -- All DOE Office Websites (Extended Search)

TX 78726 Specialty Devices Inc., Wylie, TX 75098 Background Marine occurrences of methane hydrates are known to form in two distinct ways. By far the most common occurrence is...

130

Carbon Dioxide Hydrate Process for Gas Separation from a Shifted Synthesis Gas Stream  

NLE Websites -- All DOE Office Websites (Extended Search)

Sequestration and Sequestration and Gasification Technologies Carbon DioxiDe HyDrate ProCess for Gas seParation from a sHifteD syntHesis Gas stream Background One approach to de-carbonizing coal is to gasify it to form fuel gas consisting predominately of carbon monoxide and hydrogen. This fuel gas is sent to a shift conversion reactor where carbon monoxide reacts with steam to produce carbon dioxide (CO 2 ) and hydrogen. After scrubbing the CO 2 from the fuel, a stream of almost pure hydrogen stream remains, which can be burned in a gas turbine or used to power a fuel cell with essentially zero emissions. However, for this approach to be practical, it will require an economical means of separating CO 2 from mixed gas streams. Since viable options for sequestration or reuse of CO

131

Contribution of oceanic gas hydrate dissociation to the formation of Arctic Ocean methane plumes  

SciTech Connect

Vast quantities of methane are trapped in oceanic hydrate deposits, and there is concern that a rise in the ocean temperature will induce dissociation of these hydrate accumulations, potentially releasing large amounts of carbon into the atmosphere. Because methane is a powerful greenhouse gas, such a release could have dramatic climatic consequences. The recent discovery of active methane gas venting along the landward limit of the gas hydrate stability zone (GHSZ) on the shallow continental slope (150 m - 400 m) west of Svalbard suggests that this process may already have begun, but the source of the methane has not yet been determined. This study performs 2-D simulations of hydrate dissociation in conditions representative of the Arctic Ocean margin to assess whether such hydrates could contribute to the observed gas release. The results show that shallow, low-saturation hydrate deposits, if subjected to recently observed or future predicted temperature changes at the seafloor, can release quantities of methane at the magnitudes similar to what has been observed, and that the releases will be localized near the landward limit of the GHSZ. Both gradual and rapid warming is simulated, along with a parametric sensitivity analysis, and localized gas release is observed for most of the cases. These results resemble the recently published observations and strongly suggest that hydrate dissociation and methane release as a result of climate change may be a real phenomenon, that it could occur on decadal timescales, and that it already may be occurring.

Reagan, M.; Moridis, G.; Elliott, S.; Maltrud, M.

2011-06-01T23:59:59.000Z

132

Comparison of kinetic and equilibrium reaction models insimulating gas hydrate behavior in porous media  

SciTech Connect

In this study we compare the use of kinetic and equilibriumreaction models in the simulation of gas (methane) hydrate behavior inporous media. Our objective is to evaluate through numerical simulationthe importance of employing kinetic versus equilibrium reaction modelsfor predicting the response of hydrate-bearing systems to externalstimuli, such as changes in pressure and temperature. Specifically, we(1) analyze and compare the responses simulated using both reactionmodels for natural gas production from hydrates in various settings andfor the case of depressurization in a hydrate-bearing core duringextraction; and (2) examine the sensitivity to factors such as initialhydrate saturation, hydrate reaction surface area, and numericaldiscretization. We find that for large-scale systems undergoing thermalstimulation and depressurization, the calculated responses for bothreaction models are remarkably similar, though some differences areobserved at early times. However, for modeling short-term processes, suchas the rapid recovery of a hydrate-bearing core, kinetic limitations canbe important, and neglecting them may lead to significantunder-prediction of recoverable hydrate. The use of the equilibriumreaction model often appears to be justified and preferred for simulatingthe behavior of gas hydrates, given that the computational demands forthe kinetic reaction model far exceed those for the equilibrium reactionmodel.

Kowalsky, Michael B.; Moridis, George J.

2006-11-29T23:59:59.000Z

133

Mechanisms Leading to Co-existence of Gas and Hydrate in Ocean...  

NLE Websites -- All DOE Office Websites (Extended Search)

Leading to Co-existence of Gas and Hydrate in Ocean Sediments Steven Bryant Dept. of Petroleum and Geosystems Engineering The University of Texas at Austin and Ruben Juanes Dept....

134

Expedition Provides New Insight on Gas Hydrates in Gulf of Mexico  

NLE Websites -- All DOE Office Websites (Extended Search)

4, 2013 Expedition Provides New Insight on Gas Hydrates in Gulf of Mexico USGS technicians Eric Moore and Jenny White deploy instruments at the start of a seismic survey to explore...

135

Sulfur geochemistry of thermogenic gas hydrate and associated sediment from the Texas-Louisiana continental slope  

E-Print Network (OSTI)

Thermogenic gas hydrate and associated sediment were recovered from the northern Gulf of Mexico east of the Mississippi Canyon to investigate the interactions between gas hydrate and sedimentary sulfides. Sediment solid phase analyses included total reduced sulfide (TRS), acid volatile sulfide, and citrate-dithionate and HCl extractable iron. Pore-fluid measurements included []H?S, chloride, sulfate, ammonia and total dissolved inorganic carbon. Gas hydrate hydrogen sulfide and carbon dioxide content were measured using a new wet chemical technique. The []ł?S relative to Vienna Canyon Diablo troilite was determined for TRS and hydrate H?S. Extensive (>95%) reduction of pore-fluid sulfate occurred, resulting in exceptionally high []H?S concentrations (up to ~10 mM) and TRS concentrations (271 ± 50 []mole/g). However, the mole fraction of H?S within the gas hydrate was too low (~0.3%) to significantly influence hydrate stability. This appears related to high reactive iron concentrations which average 256 ± 66 []mol/g (pyrite iron + HCl extractable iron). These iron-rich sediments are thus capable of sequestering much of the generated sulfide in the form of TRS minerals, thereby making it unavailable for incorporation by gas hydrate. The TRS concentrations are about an order of magnitude greater than expected for sites at similar water depths in the northern Gulf of Mexico. Steep dissolved []H?S concentration gradients were observed both above and below the gas hydrate indicating diffusion of sulfide from the surrounding system into the gas hydrate. The gradients were used to estimate an incorporation rate of ~1 []mol H?S/yr-cm˛ assuming molecular diffusion. TRS in close proximity to the hydrate was depleted in ł?S by ~10[0/00] relative to TRS remote to the hydrate. The precise mechanism responsible for this relative depletion in ł?S is not clear, but may prove an important geochemical indicator of sediments in which gas hydrate is or has been present. Studies at other sites will be necessary to confirm the generality of these observations.

Gledhill, Dwight Kuehl

2001-01-01T23:59:59.000Z

136

Basin scale assessment of gas hydrate dissociation in response to climate change  

SciTech Connect

Paleooceanographic evidence has been used to postulate that methane from oceanic hydrates may have had a significant role in regulating climate. However, the behavior of contemporary oceanic methane hydrate deposits subjected to rapid temperature changes, like those now occurring in the arctic and those predicted under future climate change scenarios, has only recently been investigated. Field investigations have discovered substantial methane gas plumes exiting the seafloor along the Arctic Ocean margin, and the plumes appear at depths corresponding to the upper limit of a receding gas hydrate stability zone. It has been suggested that these plumes may be the first visible signs of the dissociation of shallow hydrate deposits due to ongoing climate change in the arctic. We simulate the release of methane from oceanic deposits, including the effects of fully-coupled heat transfer, fluid flow, hydrate dissociation, and other thermodynamic processes, for systems representative of segments of the Arctic Ocean margins. The modeling encompasses a range of shallow hydrate deposits from the landward limit of the hydrate stability zone down to water depths beyond the expected range of century-scale temperature changes. We impose temperature changes corresponding to predicted rates of climate change-related ocean warming and examine the possibility of hydrate dissociation and the release of methane. The assessment is performed at local-, regional-, and basin-scales. The simulation results are consistent with the hypothesis that dissociating shallow hydrates alone can result in significant methane fluxes at the seafloor. However, the methane release is likely to be confined to a narrow region of high dissociation susceptibility, defined by depth and temperature, and that any release will be continuous and controlled, rather than explosive. This modeling also establishes the first realistic bounds for methane release along the arctic continental shelf for potential hydrate dissociation scenarios, and ongoing work may help confirm whether climate change is already impacting the stability of the vast oceanic hydrate reservoir.

Reagan, M.; Moridis, G.; Elliott, S.; Maltrud, M.; Cameron-Smith, P.

2011-07-01T23:59:59.000Z

137

CONTENTS BOEM Releases Assessment of In-Place Gas Hydrate Resources  

NLE Websites -- All DOE Office Websites (Extended Search)

BOEM Releases Assessment of BOEM Releases Assessment of In-Place Gas Hydrate Resources of the Lower 48 United States Outer Continental Shelf ..............1 Re-examination of Seep Activity at the Blake Ridge Diapir ............6 Field Data from 2011/2012 ConocoPhillips-JOGMEC-DOE Iġnik Sikumi Gas Hydrate Field Trial Now Available .......................9 Announcements .......................11 * Norwegian Center of Excellence to Receive Ten Years of Arctic Research Funding * Release of Mallik 2007-2008 Results * Goldschmidt Conference * 2012 Methane Hydrate Research Fellowship Awarded to Jeffrey James Marlow Spotlight on Research........... 16 Bjørn Kvamme CONTACT Ray Boswell Technology Manager-Methane Hydrates, Strategic Center for Natural Gas & Oil 304-285-4541 ray.boswell@netl.doe.gov

138

GAS METHANE HYDRATES-RESEARCH STATUS, ANNOTATED BIBLIOGRAPHY, AND ENERGY IMPLICATIONS  

SciTech Connect

The objective of this task as originally conceived was to compile an assessment of methane hydrate deposits in Alaska from available sources and to make a very preliminary evaluation of the technical and economic feasibility of producing methane from these deposits for remote power generation. Gas hydrates have recently become a target of increased scientific investigation both from the standpoint of their resource potential to the natural gas and oil industries and of their positive and negative implications for the global environment After we performed an extensive literature review and consulted with representatives of the U.S. Geological Survey (USGS), Canadian Geological Survey, and several oil companies, it became evident that, at the current stage of gas hydrate research, the available information on methane hydrates in Alaska does not provide sufficient grounds for reaching conclusions concerning their use for energy production. Hence, the original goals of this task could not be met, and the focus was changed to the compilation and review of published documents to serve as a baseline for possible future research at the Energy & Environmental Research Center (EERC). An extensive annotated bibliography of gas hydrate publications has been completed. The EERC will reassess its future research opportunities on methane hydrates to determine where significant initial contributions could be made within the scope of limited available resources.

James Sorensen; Jaroslav Solc; Bethany Bolles

2000-07-01T23:59:59.000Z

139

Integrating Natural Gas Hydrates in the Global Carbon Cycle  

Science Conference Proceedings (OSTI)

We produced a two-dimensional geological time- and basin-scale model of the sedimentary margin in passive and active settings, for the simulation of the deep sedimentary methane cycle including hydrate formation. Simulation of geochemical data required development of parameterizations for bubble transport in the sediment column, and for the impact of the heterogeneity in the sediment pore fluid flow field, which represent new directions in modeling methane hydrates. The model is somewhat less sensitive to changes in ocean temperature than our previous 1-D model, due to the different methane transport mechanisms in the two codes (pore fluid flow vs. bubble migration). The model is very sensitive to reasonable changes in organic carbon deposition through geologic time, and to details of how the bubbles migrate, in particular how efficiently they are trapped as they rise through undersaturated or oxidizing chemical conditions and the hydrate stability zone. The active margin configuration reproduces the elevated hydrate saturations observed in accretionary wedges such as the Cascadia Margin, but predicts a decrease in the methane inventory per meter of coastline relative to a comparable passive margin case, and a decrease in the hydrate inventory with an increase in the plate subduction rate.

David Archer; Bruce Buffett

2011-12-31T23:59:59.000Z

140

Development of an electrical resistivity cone for the detection of gas hydrates in marine sediments  

E-Print Network (OSTI)

Natural gas hydrates are formed when, under certain pressure and temperature conditions, gas molecules become encaged by hydrogenbonded oxygen atoms, forming a solid, ice-like crystalline substance. They have been found all over the world in both onshore and offshore environments, as well as in permafrost and tropical regions. The presence of natural gas hydrates in marine sediments are of concern to geotechnical engineers for several reasons, including: (1) their effect on the load bearing properties of ocean sediments, and (2) the effect that their dissociation has on the engineering properties of ocean sediments. The recovery of intact, in-situ samples of gas hydrates can be difficult due to their dependence on pressure and temperature conditions. The development of an electrical resistivity cone for the detection of gas hydrates in marine sediments would be ideal because: (1) there is a dramatic contrast between the electrical properties of gas hydrates and ocean sediments; (2) the resistivity module could be incorporated with standard cone penetrometer testing equipment; and (3) it could allow the in-situ detection of gas hydrates without dramatically affecting the surrounding temperature and pressure conditions. The objectives of this study were to design, fabricate and test an electrical resistivity cone using a two-electrode and four-electrode configuration. The laboratory testing program consisted of pushing the cone through a three-layer soil profile in which the central layer (target layer) consisted of simulated gas hydrates. The target layer thickness varied from 1 to 6 inches (2.5 to 15 cm) and the "hydrate" content varied from 10% to 100% by volume. The objective was to determine the effectiveness of the cone for use in the detection of thin resistive layers and randomly dispersed resistive nodules. The laboratory test results indicated that the four-electrode configuration may be more appropriate for the detection of both thin resistive layers and random resistive nodules. Layers as thin as 1 inch (2.5 cm) and containing as little as 10% "hydrate" nodules were successfully detected using this configuration.

McClelland, Martha Ann

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Gas Hydrate Characterization in the GoM using Marine EM Methods  

SciTech Connect

In spite of the importance of gas hydrate as a low-carbon fuel, a possible contributor to rapid climate change, and a significant natural hazard, our current understanding about the amount and distribution of submarine gas hydrate is somewhat poor; estimates of total volume vary by at least an order of magnitude, and commercially useful concentrations of hydrate have remained an elusive target. This is largely because conventional geophysical tools have intrinsic limitations in their ability to quantitatively image hydrate. It has long been known from well logs that gas hydrate is resistive compared to the host sediments, and electrical and electromagnetic methods have been proposed and occasionally used to image hydrates. This project seeks to expand our capabilities to use electromagnetic methods to explore for gas hydrate in the marine environment. An important basic science aspect of our work was to quantify the resistivity of pure gas hydrate as a function of temperature at seafloor pressures. We designed, constructed, and tested a highpressure cell in which hydrate could be synthesized and then subjected to electrical conductivity measurements. Impedance spectroscopy at frequencies between 20 Hz and 2 MHz was used to separate the effect of the blocking electrodes from the intrinsic conductivity of the hydrate. We obtained very reproducible results that showed that pure methane hydrate was several times more resistive than the water ice that seeded the synthesis, 20,000 {Ohm}m at 0{degrees}#14;C, and that the activation energy is 30.6 kJ/mol over the temperature range of -15 to 15{degrees}#14;C. Adding silica sand to the hydrate, however, showed that the addition of the extra phase caused the conductivity of the assemblage to increase in a counterintuitive way. The fact that the increased conductivity collapsed after a percolation threshold was reached, and that the addition of glass beads does not produce a similar increase in conductivity, together suggest that while the surface of the gas hydrate grains are not intrinsically conductive, the presence of sand does increase their conductivity. In the field component of this project, we carried out an 18day cruise on the R.V. Roger Revelle in the Gulf of Mexico from 7th-Ă?Â?26th October 2008 to collect controlled-source electromagnetic (CSEM) data over four hydrate prospects; blocks AC 818, WR 313, GC 955, and MC 118. During these surveys we deployed 30 ocean bottom electromagnetic (OBEM) recorders a total of 94 times at four survey areas and towed the Scripps Undersea Electromagnetic Source Instrument (SUESI) a total of 103 hours. SUESI transmission was 200 A on a 50 m dipole antenna at heights of 70-100 m above the seafloor. We also towed a neutrally buoyant 3-axis electric field recorder behind the SUESI antenna at a constant offset of 300 m. The use of a towed receiver that is "flown" above the seafloor allowed us to operate in areas where seafloor infrastructure such as wellheads, pipelines, and installed scientific equipment existed. We reduced the data to apparent resistivity psuedosections. The most compelling results come from the hydrate observatory at MC 118, where a localized resistivity anomaly is clearly identified under the southeast crater in an otherwise uniform 1 {Ohm}m background. The data from MC 118 also show that authigenic carbonate does not necessarily express itself as a confounding resistor, as was feared at the start of this project. While the results from the other prospects are much more complicated, the data are well correlated with known geology, and line to line agreement is good. Although these data are not amenable to 1D inversion as was initially hoped, we expect to use a newly developed 2D CSEM inversion code to continue to get useful information from this rich data set.

Steven Constable

2012-03-31T23:59:59.000Z

142

Alteration of gas phase ion polarizabilities upon hydration in high dielectric liquids  

E-Print Network (OSTI)

We investigate the modification of gas phase ion polarizabilities upon solvation in polar solvents and ionic liquids. To this aim, we develop a classical electrostatic theory of charged liquids composed of solvent molecules modeled as finite size dipoles, and embedding polarizable ions that consist of Drude oscillators. In qualitative agreement with ab-initio calculations of polar solvents and ionic liquids, the hydration energy of a polarizable ion in both type of dielectric liquid is shown to favor the expansion of its electronic cloud. Namely, the ion carrying no dipole moment in the gas phase acquires a dipole moment in the liquid environment, but its electron cloud also reaches an enhanced rigidity. We find that the overall effect is an increase of the gas phase polarizability upon hydration. In the specific case of ionic liquids, it is shown that this hydration process is driven by a collective solvation mechanism where the dipole moment of a polarizable ion induced by its interaction with surrounding ions self-consistently adds to the polarization of the liquid, thereby amplifying the dielectric permittivity of the medium in a substantial way. We propose this self-consistent hydration as the underlying mechanism behind the high dielectric permittivities of ionic liquids composed of small charges with negligible gas phase dipole moment. Hydration being a correlation effect, the emerging picture indicates that electrostatic correlations cannot be neglected in polarizable liquids.

Sahin Buyukdagli; Tapio Ala-Nissila

2013-04-23T23:59:59.000Z

143

NETL: Methane Hydrates - Methane Hydrate Library  

NLE Websites -- All DOE Office Websites (Extended Search)

Ridge region Ongoing areas of study in the Hydrate Ridge region Map showing where gas hydrates occur off the Cascadia Margin Locations of methane hydrate off the Cascadia Margin...

144

GAS PRODUCTION POTENTIAL OF DISPERSE LOW-SATURATION HYDRATE ACCUMULATIONS IN  

NLE Websites -- All DOE Office Websites (Extended Search)

61446 61446 GAS PRODUCTION POTENTIAL OF DISPERSE LOW-SATURATION HYDRATE ACCUMULATIONS IN OCEANIC SEDIMENTS George J. Moridis Earth Sciences Division Lawrence Berkeley National Laboratory Berkeley, CA 94720 E. Dendy Sloan Center for Hydrate Research and Chemical Engineering Department Colorado School of Mines Golden, CO 80401 August 2006 This work was partly supported by the Assistant Secretary for Fossil Energy, Office of Natural Gas and Petroleum Technology, through the National Energy Technology Laboratory, under the U.S. Department of Energy, Contract No. DE-AC03-76SF00098. Gas Production Potential of Disperse Low-Saturation Hydrate Accumulations in Oceanic Sediments George J. Moridis 1 and E. Dendy Sloan 2 1 Earth Sciences Division, Lawrence Berkeley National Laboratory, MS 90-1166

145

NETL: Methane Hydrates - DOE/NETL Projects - Mapping Permafrost and Gas  

NLE Websites -- All DOE Office Websites (Extended Search)

Mapping Permafrost and Gas Hydrate using Marine Controlled Source Electromagnetic Methods (CSEM) Last Reviewed 12/18/2013 Mapping Permafrost and Gas Hydrate using Marine Controlled Source Electromagnetic Methods (CSEM) Last Reviewed 12/18/2013 DE-FE0010144 Goal The objective of this project is to develop and test a towed electromagnetic source and receiver system suitable for deployment from small coastal vessels to map near-surface electrical structure in shallow water. The system will be used to collect permafrost data in the shallow water of the U.S. Beaufort Inner Shelf at locations coincident with seismic lines collected by the U.S. Geological Survey (USGS). The electromagnetic data will be used to identify the geometry, extent, and physical properties of permafrost and any associated gas hydrate in order to provide a baseline for future studies of the effects of any climate-driven dissociation of

146

Final Technical Report on: Controls on Gas Hydrate Formation and Dissociation,  

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Final Technical Report on: Controls on Gas Hydrate Formation and Dissociation, Final Technical Report on: Controls on Gas Hydrate Formation and Dissociation, Gulf of Mexico: In Situ Field Study with Laboratory Characterizations of Exposed and Buried Gas Hydrates DOE Award Number: DE-FC26-02NT41328 Dates: 3/4/02 - 3/3/06 Prepared by: Miriam Kastner, Scripps Institution of Oceanography, La Jolla, California 92093 Ian MacDonald, Texas A&M University, Corpus Christi, Texas 78412 Prepared for US Department of Energy National Energy Technology Laboratory June 2006 2 Disclaimer "This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any

147

Structural and Kinetic Studies of Structure I Gas Hydrates via Low Temperature X-Ray Diffraction and High Resolution Neutron Diffraction.  

E-Print Network (OSTI)

??Gas hydrates are materials of interest as sources for clean energy, carbon sequestration, greenhouse gas mitigation, and gas storage. This body of work presents two… (more)

Everett, Susan Michelle

2013-01-01T23:59:59.000Z

148

NETL: Methane Hydrates - Hydrate Newsletter  

NLE Websites -- All DOE Office Websites (Extended Search)

Methane Hydrate R&D Program Newsletter Methane Hydrate R&D Program Newsletter An image of a hydrate burning overlayed with the Newsletter Title: Fire in the Ice The methane hydrate newsletter, Fire in the Ice, is a bi-annual publication highlighting the latest developments in international gas hydrates R&D. Fire in the Ice promotes the exchange of information amoung those involved in gas hydrates research and development, and also recognizes the efforts of a hydrate researcher in each issue. The newsletter now reaches nearly 1300 scientists and other interested individuals in sixteen countries. To subscribe electronically to Fire in the Ice please send an email to karl.lang@contr.netl.doe.gov Please click on the links below to access issues of "Fire in the Ice". More on Methane Hydrates

149

NETL: Methane Hydrates - DOE/NETL Projects - Estimate Gas-Hydrate...  

NLE Websites -- All DOE Office Websites (Extended Search)

to overcome compression and friction at grain contacts, a fracture will form. In a multiphase environment, due to surface tension effects, the gas pressure will not...

150

ŤCharacterizing Natural Gas Hydrates in the Deep Water Gulf...  

NLE Websites -- All DOE Office Websites (Extended Search)

relating to drilling and production of oil and gas, as well as building and operating pipelines. Other objectives of this project are to better understand how natural gas...

151

RESOURCE CHARACTERIZATION AND QUANTIFICATION OF NATURAL GAS-HYDRATE AND ASSOCIATED FREE-GAS ACCUMULATIONS IN THE PRUDHOE BAY - KUPARUK RIVER AREA ON THE NORTH SLOPE OF ALASKA  

SciTech Connect

Interim results are presented from the project designed to characterize, quantify, and determine the commercial feasibility of Alaska North Slope (ANS) gas-hydrate and associated free-gas resources in the Prudhoe Bay Unit (PBU), Kuparuk River Unit (KRU), and Milne Point Unit (MPU) areas. This collaborative research will provide practical input to reservoir and economic models, determine the technical feasibility of gas hydrate production, and influence future exploration and field extension of this potential ANS resource. The large magnitude of unconventional in-place gas (40-100 TCF) and conventional ANS gas commercialization evaluation creates industry-DOE alignment to assess this potential resource. This region uniquely combines known gas hydrate presence and existing production infrastructure. Many technical, economical, environmental, and safety issues require resolution before enabling gas hydrate commercial production. Gas hydrate energy resource potential has been studied for nearly three decades. However, this knowledge has not been applied to practical ANS gas hydrate resource development. ANS gas hydrate and associated free gas reservoirs are being studied to determine reservoir extent, stratigraphy, structure, continuity, quality, variability, and geophysical and petrophysical property distribution. Phase 1 will characterize reservoirs, lead to recoverable reserve and commercial potential estimates, and define procedures for gas hydrate drilling, data acquisition, completion, and production. Phases 2 and 3 will integrate well, core, log, and long-term production test data from additional wells, if justified by results from prior phases. The project could lead to future ANS gas hydrate pilot development. This project will help solve technical and economic issues to enable government and industry to make informed decisions regarding future commercialization of unconventional gas-hydrate resources.

Robert Hunter; Shirish Patil; Robert Casavant; Tim Collett

2003-06-02T23:59:59.000Z

152

Geophysical evidence for gas hydrates in the deep water of the South Caspian Basin, Azerbaijan  

E-Print Network (OSTI)

Geophysical evidence for gas hydrates in the deep water of the South Caspian Basin, Azerbaijan C the South Caspian Sea, offshore Azerbaijan, document for the ®rst time in the deep water (up to 650 m Caspian Sea. The Absheron block, named after the nearby Absheron Peninsula in Azerbaijan, is situated

Knapp, Camelia Cristina

153

GULF OF MEXICO SEAFLOOR STABILITY AND GAS HYDRATE MONITORING STATION PROJECT  

SciTech Connect

The gas hydrates research Consortium (HRC), established and administered at the University if Mississippi's Center for Marine Research and Environmental Technology (CMRET) has been active on many fronts in FY 03. Extension of the original contract through March 2004, has allowed completion of many projects that were incomplete at the end of the original project period due, primarily, to severe weather and difficulties in rescheduling test cruises. The primary objective of the Consortium, to design and emplace a remote sea floor station for the monitoring of gas hydrates in the Gulf of Mexico by the year 2005 remains intact. However, the possibility of levering HRC research off of the Joint Industries Program (JIP) became a possibility that has demanded reevaluation of some of the fundamental assumptions of the station format. These provisions are discussed in Appendix A. Landmark achievements of FY03 include: (1) Continuation of Consortium development with new researchers and additional areas of research contribution being incorporated into the project. During this period, NOAA's National Undersea Research Program's (NURP) National Institute for Undersea Science and Technology (NIUST) became a Consortium funding partner, joining DOE and Minerals Management Service (MMS); (2) Very successful annual and semiannual meetings in Oxford Mississippi in February and September, 2003; (3) Collection of piston cores from MC798 in support of the effort to evaluate the site for possible monitoring station installation; (4) Completion of the site evaluation effort including reports of all localities in the northern Gulf of Mexico where hydrates have been documented or are strongly suspected to exist on the sea floor or in the shallow subsurface; (5) Collection and preliminary evaluation of vent gases and core samples of hydrate from sites in Green Canyon and Mississippi Canyon, northern Gulf of Mexico; (6) Monitoring of gas activity on the sea floor, acoustically and thermally; (7) Design, construction, and successful deployment of an in situ pore-water sampling device; (8) Improvements to the original Raman spectrometer (methane sensor); (9) Laboratory demonstration of the impact of bacterially-produced surfactants' rates of hydrate formation; (10) Construction and sea floor emplacement and testing--with both watergun and ship noise sources--of the prototypal vertical line array (VLA); (11) Initiation of studies of spatial controls on hydrates; (12) Compilation and analyses of seismic data, including mapping of surface anomalies; (13) Additional field verification (bottom samples recovered), in support of the site selection effort; (14) Collection and preliminary analyses of gas hydrates from new sites that exhibit variant structures; (15) Initial shear wave tests carried out in shallow water; (16) Isolation of microbes for potential medicinal products development; (17) Preliminary modeling of occurrences of gas hydrates.

J. Robert Woolsey; Thomas M. McGee; Robin C. Buchannon

2004-11-01T23:59:59.000Z

154

New Natural Gas Storage and Transportation Capabilities Utilizing Rapid Methane Hydrate Formation Techniques  

Science Conference Proceedings (OSTI)

Natural gas (methane as the major component) is a vital fossil fuel for the United States and around the world. One of the problems with some of this natural gas is that it is in remote areas where there is little or no local use for the gas. Nearly 50 percent worldwide natural gas reserves of ~6,254.4 trillion ft3 (tcf) is considered as stranded gas, with 36 percent or ~86 tcf of the U.S natural gas reserves totaling ~239 tcf, as stranded gas [1] [2]. The worldwide total does not include the new estimates by U.S. Geological Survey of 1,669 tcf of natural gas north of the Arctic Circle, [3] and the U.S. ~200,000 tcf of natural gas or methane hydrates, most of which are stranded gas reserves. Domestically and globally there is a need for newer and more economic storage, transportation and processing capabilities to deliver the natural gas to markets. In order to bring this resource to market, one of several expensive methods must be used: 1. Construction and operation of a natural gas pipeline 2. Construction of a storage and compression facility to compress the natural gas (CNG) at 3,000 to 3,600 psi, increasing its energy density to a point where it is more economical to ship, or 3. Construction of a cryogenic liquefaction facility to produce LNG, (requiring cryogenic temperatures at <-161 °C) and construction of a cryogenic receiving port. Each of these options for the transport requires large capital investment along with elaborate safety systems. The Department of Energy's Office of Research and Development Laboratories at the National Energy Technology Laboratory (NETL) is investigating new and novel approaches for rapid and continuous formation and production of synthetic NGHs. These synthetic hydrates can store up to 164 times their volume in gas while being maintained at 1 atmosphere and between -10 to -20°C for several weeks. Owing to these properties, new process for the economic storage and transportation of these synthetic hydrates could be envisioned for stranded gas reserves. The recent experiments and their results from the testing within NETL's 15-Liter Hydrate Cell Facility exhibit promising results. Introduction of water at the desired temperature and pressure through an NETL designed nozzle into a temperature controlled methane environment within the 15-Liter Hydrate Cell allowed for instantaneous formation of methane hydrates. The instantaneous and continuous hydrate formation process was repeated over several days while varying the flow rate of water, its' temperature, and the overall temperature of the methane environment. These results clearly indicated that hydrates formed immediately after the methane and water left the nozzle at temperatures above the freezing point of water throughout the range of operating conditions. [1] Oil and Gas Journal Vol. 160.48, Dec 22, 2008. [2] http://www.eia.doe.gov/oiaf/servicerpt/natgas/chapter3.html and http://www.eia.doe.gov/oiaf/servicerpt/natgas/pdf/tbl7.pdf [3] U.S. Geological Survey, “Circum-Arctic Resource Appraisal: Estimates of Undiscovered Oil and Gas North of the Arctic Circle,” May 2008.

Brown, T.D.; Taylor, C.E.; Bernardo, M.

2010-01-01T23:59:59.000Z

155

Fundamentals of Natural Gas and Species Flows from Hydrate Dissociation - Applications to Safety and Sea Floor Instability  

SciTech Connect

Semi-analytical computational models for natural gas flow in hydrate reservoirs were developed and the effects of variations in porosity and permeability on pressure and temperature profiles and the movement of a dissociation front were studied. Experimental data for variations of gas pressure and temperature during propane hydrate formation and dissociation for crushed ice and mixture of crushed ice and glass beads under laboratory environment were obtained. A thermodynamically consistent model for multiphase liquid-gas flows trough porous media was developed. Numerical models for hydrate dissociation process in one dimensional and axisymmetric reservoir were performed. The computational model solved the general governing equations without the need for linearization. A detail module for multidimensional analysis of hydrate dissociation which make use of the FLUENT code was developed. The new model accounts for gas and liquid water flow and uses the Kim-Boshnoi model for hydrate dissociation.

Goodarz Ahmadi

2006-09-30T23:59:59.000Z

156

Regional long-term production modeling from a single well test, Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope  

Science Conference Proceedings (OSTI)

Following the results from the open-hole formation pressure response test in the BPXA-DOE-USGS Mount Elbert Gas Hydrate Stratigraphic Test Well (Mount Elbert well) using Schlumberger’s Modular Dynamics Formation Tester (MDT) wireline tool, the International Methane Hydrate Reservoir Simulator Code Comparison project performed long-term reservoir simulations on three different model reservoirs. These descriptions were based on 1) the Mount Elbert gas hydrate accumulation as delineated by an extensive history-matching exercise, 2) an estimation of the hydrate accumulation near the Prudhoe Bay L-pad, and 3) a reservoir that would be down-dip of the Prudhoe Bay L-pad and therefore warmer and deeper. All of these simulations were based, in part, on the results of the MDT results from the Mount Elbert Well. The comparison group’s consensus value for the initial perme- ability of the hydrate-filled reservoir (k = 0.12 mD) and the permeability model based on the MDT history match were used as the basis for subsequent simulations on the three regional scenarios. The simulation results of the five different simulation codes, CMG STARS, HydrateResSim, MH-21 HYDRES, STOMP-HYD, and TOUGHţHYDRATE exhibit good qualitative agreement and the variability of potential methane production rates from gas hydrate reservoirs is illustrated. As expected, the pre- dicted methane production rate increased with increasing in situ reservoir temperature; however, a significant delay in the onset of rapid hydrate dissociation is observed for a cold, homogeneous reservoir and it is found to be repeatable. The inclusion of reservoir heterogeneity in the description of this cold reservoir is shown to eliminate this delayed production. Overall, simulations utilized detailed information collected across the Mount Elbert reservoir either obtained or determined from geophysical well logs, including thickness (37 ft), porosity (35%), hydrate saturation (65%), intrinsic permeability (1000 mD), pore water salinity (5 ppt), and formation temperature (3.3–3.9 ?C). This paper presents the approach and results of extrapolating regional forward production modeling from history-matching efforts on the results from a single well test.

Anderson, Brian; Kurihara, Masanori; White, Mark D.; Moridis, George J.; Wilson, Scott J.; Pooladi-Darvish, Mehran; Gaddipati, Manohar; Masuda, Yoshihiro; Collett, T. S.; Hunter, Robert B.; Narita, Hideo; Rose, Kelly K.; Boswell, Ray

2011-02-02T23:59:59.000Z

157

NETL: Hydrogen & Clean Fuels - Abstract : Gas Adsorption on Single...  

NLE Websites -- All DOE Office Websites (Extended Search)

Dynamics Geological & Env. Systems Materials Science Contacts TECHNOLOGIES Oil & Natural Gas Supply Deepwater Technology Enhanced Oil Recovery Gas Hydrates Natural Gas Resources...

158

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

System Dynamics Geological & Env. Systems Materials Science Contacts TECHNOLOGIES Oil & Natural Gas Supply Deepwater Technology Enhanced Oil Recovery Gas Hydrates Natural Gas...

159

Gas-Phase Molecular Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

Gas-Phase Molecular Dynamics Gas-Phase Molecular Dynamics The Gas-Phase Molecular Dynamics Group is dedicated to developing and applying spectroscopic and theoretical tools to challenging problems in chemical physics related to reactivity, structure, dynamics and kinetics of transient species. Recent theoretical work has included advances in exact variational solution of vibrational quantum dynamics, suitable for up to five atoms in systems where large amplitude motion or multiple strongly coupled modes make simpler approximations inadequate. Other theoretical work, illustrated below, applied direct dynamics, quantum force trajectory calculations to investigate a series of reactions of the HOCO radical. The potential energy surface for the OH + CO/ H + CO2 reaction, showing two barriers (TS1 and TS2) and the deep HOCO well along the minimum energy pathway. The inset figure shows the experimental and calculated reactivity of HOCO with selected collision partners. See J.S. Francisco, J.T. Muckerman and H.-G. Yu, "HOCO radical chemistry,"

160

Coalbed Methane Procduced Water Treatment Using Gas Hydrate Formation at the Wellhead  

Science Conference Proceedings (OSTI)

Water associated with coalbed methane (CBM) production is a significant and costly process waste stream, and economic treatment and/or disposal of this water is often the key to successful and profitable CBM development. In the past decade, advances have been made in the treatment of CBM produced water. However, produced water generally must be transported in some fashion to a centralized treatment and/or disposal facility. The cost of transporting this water, whether through the development of a water distribution system or by truck, is often greater than the cost of treatment or disposal. To address this economic issue, BC Technologies (BCT), in collaboration with Oak Ridge National Laboratory (ORNL) and International Petroleum Environmental Consortium (IPEC), proposed developing a mechanical unit that could be used to treat CBM produced water by forming gas hydrates at the wellhead. This process involves creating a gas hydrate, washing it and then disassociating hydrate into water and gas molecules. The application of this technology results in three process streams: purified water, brine, and gas. The purified water can be discharged or reused for a variety of beneficial purposes and the smaller brine can be disposed of using conventional strategies. The overall objectives of this research are to develop a new treatment method for produced water where it could be purified directly at the wellhead, to determine the effectiveness of hydrate formation for the treatment of produced water with proof of concept laboratory experiments, to design a prototype-scale injector and test it in the laboratory under realistic wellhead conditions, and to demonstrate the technology under field conditions. By treating the water on-site, producers could substantially reduce their surface handling costs and economically remove impurities to a quality that would support beneficial use. Batch bench-scale experiments of the hydrate formation process and research conducted at ORNL confirmed the feasibility of the process. However, researchers at BCT were unable to develop equipment suitable for continuous operation and demonstration of the process in the field was not attempted. The significant achievements of the research area: Bench-scale batch results using carbon dioxide indicate >40% of the feed water to the hydrate formation reactor was converted to hydrate in a single pass; The batch results also indicate >23% of the feed water to the hydrate formation reactor (>50% of the hydrate formed) was converted to purified water of a quality suitable for discharge; Continuous discharge and collection of hydrates was achieved at atmospheric pressure. Continuous hydrate formation and collection at atmospheric conditions was the most significant achievement and preliminary economics indicate that if the unit could be made operable, it is potentially economic. However, the inability to continuously separate the hydrate melt fraction left the concept not ready for field demonstration and the project was terminated after Phase Two research.

BC Technologies

2009-12-30T23:59:59.000Z

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Rapid Gas Hydrate Formation Process - Energy Innovation Portal  

This invention may have utility in natural gas / CH4 storage and transport, CO2 sequestration, cold energy storage, ... (CH4) or carbon dioxide (CO2).

162

Corrosion and hydrate formation in natural gas pipelines.  

E-Print Network (OSTI)

??Gas industry annually invests millions of dollars on corrosion inhibitors in order to minimize corrosion implications on flow assurance; however, attention has never been focused… (more)

Obanijesu, Emmanuel Ogo-Oluwa

2012-01-01T23:59:59.000Z

163

Assessing the Potential of Using Hydrate Technology to Capture, Store and Transport Gas for the Caribbean Region  

E-Print Network (OSTI)

Monetizing gas has now become a high priority issue for many countries. Natural gas is a much cleaner fuel than oil and coal especially for electricity generation. Approximately 40 percent of the world's natural gas reserves remain unusable because of lack of economic technology. Gas produced with oil poses a challenge of being transported and is typically flared or re-injected into the reservoir. These are gas transportation issues we now face. Gas hydrate may be a viable means of capturing, storing and transporting stranded and associated gas. For example, stranded gas in Trinidad could be converted to gas hydrates and transported to the islands of the Caribbean. This study will seek to address some of the limitations from previous studies on transporting natural gas as a hydrate while focusing on small scale transportation of natural gas to the Caribbean Islands. This work proposes a workflow for capturing, storing and transporting gas in the hydrate form, particularly for Caribbean situations where there are infrastructural constraints such as lack of pipelines. The study shows the gas hydrate value chain for transportation of 5 MMscf/d of natural gas from Trinidad to Jamaica. The analysis evaluated the water required for hydrate formation, effect of composition on hydrate formation, the energy balance of the process, the time required for formation, transportation and dissociation and preliminary economics. The overall energy requirement of the process which involves heating, cooling and expansion is about 15-20 percent of the energy of the gas transported in hydrate form. The time estimated for the overall process is 20–30 hrs. The estimated capital cost to capture and transport 5 MMscf/d from Trinidad to Jamaica is about US$ 30 million. The composition of the gas sample can affect the conditions of formation, heating value and the expansion process. In summary, there is great potential for transporting natural gas by gas hydrate on a small scale based on the proposed hydrate work flow. This study did not prove commerciality at this time, however, some of the limitations require further evaluations and these include detailed modeling of the formation time, dissociation time and heat transfer capabilities.

Rajnauth, Jerome Joel

2010-12-01T23:59:59.000Z

164

Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluationof Technology and Potential  

SciTech Connect

Gas hydrates are a vast energy resource with global distribution in the permafrost and in the oceans. Even if conservative estimates are considered and only a small fraction is recoverable, the sheer size of the resource is so large that it demands evaluation as a potential energy source. In this review paper, we discuss the distribution of natural gas hydrate accumulations, the status of the primary international R&D programs, and the remaining science and technological challenges facing commercialization of production. After a brief examination of gas hydrate accumulations that are well characterized and appear to be models for future development and gas production, we analyze the role of numerical simulation in the assessment of the hydrate production potential, identify the data needs for reliable predictions, evaluate the status of knowledge with regard to these needs, discuss knowledge gaps and their impact, and reach the conclusion that the numerical simulation capabilities are quite advanced and that the related gaps are either not significant or are being addressed. We review the current body of literature relevant to potential productivity from different types of gas hydrate deposits, and determine that there are consistent indications of a large production potential at high rates over long periods from a wide variety of hydrate deposits. Finally, we identify (a) features, conditions, geology and techniques that are desirable in potential production targets, (b) methods to maximize production, and (c) some of the conditions and characteristics that render certain gas hydrate deposits undesirable for production.

Reagan, Matthew; Moridis, George J.; Collett, Timothy; Boswell, Ray; Kurihara, M.; Reagan, Matthew T.; Koh, Carolyn; Sloan, E. Dendy

2008-02-12T23:59:59.000Z

165

NETL: Methane Hydrates - ANS Research Project - Modular Dynamics...  

NLE Websites -- All DOE Office Websites (Extended Search)

Modular Formation Dynamics Tester (MDT) Tool The scientific plan for the Mt. Elbert Prospect includes multiple tests using Schlumbergers Modular Formation Dynamics Tester (MDT)...

166

Recent Advances in Mapping Deep Permafrost and Gas Hydrate Occurrences Using Industry Seismic Data, Richards Island Area, Northwest Territories, Canada  

E-Print Network (OSTI)

). #12;Bellefleur et al. 103 (also referred to as washout zones) is important for any gas- hydrate in Arctic permafrost regions are seen as a potential source of natural gas. Most known gasNfereNCe oN Permafrost Potsdam, U.S. Geological Survey, India Ministry of Petroleum and Natural Gas, BP

Ramachandran, Kumar

167

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Mechanical Testing of Gas Hydrate/Sediment Samples Mechanical Testing of Gas Hydrate/Sediment Samples DE-AT26-99FT40267 Goal Develop understanding of the mechanical characteristics of hydrate-containing sediments. Background The ACE CRREL has a unique group of experienced personnel that have studied the mechanical characteristics of ice and permafrost that can be applied to the study and characterization of the mechanical properties of gas hydrates. The effort aims to quantify the mechanical characteristics of methane hydrate and hydrate cemented sediments for use in models of the dynamic behavior of sediments related to drilling and seafloor installations in the Gulf of Mexico. Performers US Army Corp of Engineers, Engineer Research and Development Center, Cold Regions Research and Engineering Laboratory (CRREL) - project management and research products

168

Strategies for gas production from oceanic Class 3 hydrate accumulations  

E-Print Network (OSTI)

the cumulative mass of produced water M W . Note that pro-Salinity X P of the produced water. Gas production fromThe salinity of the produced water may pose significant

Moridis, George J.; Reagan, Matthew T.

2007-01-01T23:59:59.000Z

169

Strategies for gas production from oceanic Class 3 hydrate accumulations  

E-Print Network (OSTI)

slow conduction process (the main heat transfer mechanism)Heat transfer and gas relative permeability are challenged by the processestransfers. The resulting thermal regime involves heat addition to the dissociation process

Moridis, George J.; Reagan, Matthew T.

2007-01-01T23:59:59.000Z

170

Application of numerical, experimental and life cycle assessment methods to the investigation of natural gas production from methane hydrate deposits using carbon dioxide clathrate sequestration.  

E-Print Network (OSTI)

??Natural gas hydrates, commonly called methane (CH4) hydrates, are ice-like materials belonging to the family of clathrates that form at low temperature and high pressure.… (more)

Nago, Annick

2013-01-01T23:59:59.000Z

171

NETL: Methane Hydrates - Hydrate Modeling - TOUGH-Fx/HYDRATE  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrate Modeling - TOUGH+/HYDRATE & HydrateResSim Hydrate Modeling - TOUGH+/HYDRATE & HydrateResSim TOUGH+/HYDRATE v1.0 LBNL's new hydrate reservoir simulator (TOUGH+/HYDRATE v1.0) is now publicly available for licensing. TOUGH+/HYDRATE models non-isothermal gas release, phase behavior and flow of fluids and heat in complex geologic media. The code can simulate production from natural CH4-hydrate deposits in the subsurface (i.e., in the permafrost and in deep ocean sediments), as well as laboratory experiments of hydrate dissociation/formation in porous/fractured media. TOUGH+/HYDRATE v1.0 includes both an equilibrium and a kinetic model of hydrate formation and dissociation. More information on TOUGH+/Hydrate Also available is HydrateResSim. HydrateResSim (HRS) is a freeware, open-source reservoir simulator code available for use “as-is” from the NETL. HRS’ code was derived from an earlier version of the TOUGH+/Hydrate code.

172

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Characterization of Natural Hydrate Bearing Sediments and Hydrate Dissociation Kinetics Last Reviewed 12/6/2013 Characterization of Natural Hydrate Bearing Sediments and Hydrate Dissociation Kinetics Last Reviewed 12/6/2013 FWP-45133 Work conducted under this field work proposal (FWP) includes two distinct phases. Ongoing Phase 2 work is discussed directly below. Click here to review the completed, Phase 1 work, associated with this FWP. Phase 2 Project Information Characterization of Natural Hydrate Bearing Core Samples Goal The overarching goal of this project is to gain an improved understanding of the dynamic processes of gas hydrate accumulations in geologic media by combining laboratory studies, numerical simulation, and analysis of shipboard infrared imaging of hydrate core samples. This project comprises four principal components: (1) fundamental laboratory investigations, (2)

173

Drilling and Production Testing the Methane Hydrate Resource Potential Associated with the Barrow Gas Fields  

SciTech Connect

In November of 2008, the Department of Energy (DOE) and the North Slope Borough (NSB) committed funding to develop a drilling plan to test the presence of hydrates in the producing formation of at least one of the Barrow Gas Fields, and to develop a production surveillance plan to monitor the behavior of hydrates as dissociation occurs. This drilling and surveillance plan was supported by earlier studies in Phase 1 of the project, including hydrate stability zone modeling, material balance modeling, and full-field history-matched reservoir simulation, all of which support the presence of methane hydrate in association with the Barrow Gas Fields. This Phase 2 of the project, conducted over the past twelve months focused on selecting an optimal location for a hydrate test well; design of a logistics, drilling, completion and testing plan; and estimating costs for the activities. As originally proposed, the project was anticipated to benefit from industry activity in northwest Alaska, with opportunities to share equipment, personnel, services and mobilization and demobilization costs with one of the then-active exploration operators. The activity level dropped off, and this benefit evaporated, although plans for drilling of development wells in the BGF's matured, offering significant synergies and cost savings over a remote stand-alone drilling project. An optimal well location was chosen at the East Barrow No.18 well pad, and a vertical pilot/monitoring well and horizontal production test/surveillance well were engineered for drilling from this location. Both wells were designed with Distributed Temperature Survey (DTS) apparatus for monitoring of the hydrate-free gas interface. Once project scope was developed, a procurement process was implemented to engage the necessary service and equipment providers, and finalize project cost estimates. Based on cost proposals from vendors, total project estimated cost is $17.88 million dollars, inclusive of design work, permitting, barging, ice road/pad construction, drilling, completion, tie-in, long-term production testing and surveillance, data analysis and technology transfer. The PRA project team and North Slope have recommended moving forward to the execution phase of this project.

Steve McRae; Thomas Walsh; Michael Dunn; Michael Cook

2010-02-22T23:59:59.000Z

174

Kinetic inhibition of natural gas hydrates in offshore drilling, production, and processing. Annual report, January 1--December 31, 1993  

SciTech Connect

Natural gas hydrates are crystalline materials formed of natural gas and water at elevated pressures and reduced temperatures. Because natural gas hydrates can plug drill strings, pipelines, and process equipment, there is much effort expended to prevent their formation. The goal of this project was to provide industry with more economical hydrate inhibitors. The specific goals for the past year were to: continue both screening and high pressure experiments to determine optimum inhibitors; investigate molecular mechanisms of hydrate formation/inhibition, through microscopic and macroscopic experiments; begin controlled tests on the Exxon pilot plant loop at their Houston facility; and continue to act as a forum for the sharing of field test results. Progress on these objectives are described in this report.

NONE

1993-12-31T23:59:59.000Z

175

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Support of Gulf of Mexico Hydrate Research Consortium: Activities to Support Establishment of Sea Floor Monitoring Station Support of Gulf of Mexico Hydrate Research Consortium: Activities to Support Establishment of Sea Floor Monitoring Station DE-FC26-02NT41328 Goal Determine the potential impacts of gas hydrate instability in terms of the release of methane into seafloor sediments, the ocean and the atmosphere. Performers University of California, San Diego (Scripps Institution of Oceanography) - manage geochemical, hydrological and sedimentological investigations Texas A&M University - manage field monitoring program Location La Jolla, California 92093 Background This project will monitor, characterize, and quantify the rates of formation and dissociation of methane gas hydrates at and near the seafloor in the northern Gulf of Mexico, and determine linkages between formation/dissociation and physical/chemical parameters of the deposits over the course of a year. The stability and response of shallow gas hydrates to temperature and chemical perturbations will be monitored in situ, and localized seafloor and water column environmental impacts of hydrate formation and dissociation characterized. The following will be determined: 1) The equilibrium/steady state conditions for structure II methane gas hydrates at the field site,2) whether the system is in dynamic equilibrium and the local hydrology is characterized by steady state episodic fluid flow, and 3) how fluid fluxes and fluid composition work together to dynamically influence gas hydrate stability.

176

Characteristics and reactivity of rapidly hydrated sorbent for semidry flue gas desulfurization  

Science Conference Proceedings (OSTI)

The semidry flue gas desulfurization (FGD) process has many advantages over the wet FGD process for moving sulfur dioxide emissions from pulverized coal-fired power plants. Semidry FGD with a rapidly hydrated sorbent was studied in a pilot-scale circulating fluidized bed (CFB) experimental facility. The sorbent was made from lumps of lime and coal fly ash. The desulfurization efficiency was measured for various operating parameters, including the sorbent recirculation rate and the water spray method. The experimental results show that the desulfurization efficiencies of the rapidly hydrated sorbent were 1.5-3.0 times higher than a commonly used industrial sorbent for calcium to sulfur molar ratios from 1.2 to 3.0, mainly due to the higher specific surface area and pore volume. The Ca(OH){sub 2} content in the cyclone separator ash was about 2.9% for the rapidly hydrated sorbent and was about 0.1% for the commonly used industrial sorbent, due to the different adhesion between the fine Ca(OH){sub 2} particles and the fly ash particles, and the low cyclone separation efficiency for the fine Ca(OH){sub 2} particles that fell off the sorbent particles. Therefore the actual recirculation rates of the active sorbent with Ca(OH){sub 2} particles were higher for the rapidly hydrated sorbent, which also contributed to the higher desulfurization efficiency. The high fly ash content in the rapidly hydrated sorbent resulted in good operating stability. The desulfurization efficiency with upstream water spray was 10-15% higher than that with downstream water spray. 20 refs., 7 figs., 1 tab.

Jie Zhang; Changfu You; Suwei Zhao; Changhe Chen; Haiying Qi [Tsinghua University, Beijing (China). Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering

2008-03-01T23:59:59.000Z

177

CFD Modeling of Methane Production from Hydrate-Bearing Reservoir  

Science Conference Proceedings (OSTI)

Methane hydrate is being examined as a next-generation energy resource to replace oil and natural gas. The U.S. Geological Survey estimates that methane hydrate may contain more organic carbon the the world's coal, oil, and natural gas combined. To assist in developing this unfamiliar resource, the National Energy Technology Laboratory has undertaken intensive research in understanding the fate of methane hydrate in geological reservoirs. This presentation reports preliminary computational fluid dynamics predictions of methane production from a subsurface reservoir.

Gamwo, I.K.; Myshakin, E.M.; Warzinski, R.P.

2007-04-01T23:59:59.000Z

178

CHARACTERIZING NATURAL GAS HYDRATES IN THE DEEP WATER GULF OF MEXICO: APPLICATIONS FOR SAFE EXPLORATION AND PRODUCTION ACTIVITIES  

Science Conference Proceedings (OSTI)

In 2000, Chevron began a project to learn how to characterize the natural gas hydrate deposits in the deepwater portions of the Gulf of Mexico. A Joint Industry Participation (JIP) group was formed in 2001, and a project partially funded by the U.S. Department of Energy (DOE) began in October 2001. The primary objective of this project is to develop technology and data to assist in the characterization of naturally occurring gas hydrates in the deep water Gulf of Mexico (GOM). These naturally occurring gas hydrates can cause problems relating to drilling and production of oil and gas, as well as building and operating pipelines. Other objectives of this project are to better understand how natural gas hydrates can affect seafloor stability, to gather data that can be used to study climate change, and to determine how the results of this project can be used to assess if and how gas hydrates act as a trapping mechanism for shallow oil or gas reservoirs. During April-September 2002, the JIP concentrated on: Reviewing the tasks and subtasks on the basis of the information generated during the three workshops held in March and May 2002; Writing Requests for Proposals (RFPs) and Cost, Time and Resource (CTRs) estimates to accomplish the tasks and subtasks; Reviewing proposals sent in by prospective contractors; Selecting four contractors; Selecting six sites for detailed review; and Talking to drill ship owners and operators about potential work with the JIP.

Steve Holditch; Emrys Jones

2003-01-01T23:59:59.000Z

179

CHARACTERIZING NATURAL GAS HYDRATES IN THE DEEP WATER GULF OF MEXICO: APPLICATIONS FOR SAFE EXPLORATION AND PRODUCTION ACTIVITIES  

Science Conference Proceedings (OSTI)

In 2000, Chevron began a project to learn how to characterize the natural gas hydrate deposits in the deepwater portions of the Gulf of Mexico. A Joint Industry Participation (JIP) group was formed in 2001, and a project partially funded by the U.S. Department of Energy (DOE) began in October 2001. The primary objective of this project is to develop technology and data to assist in the characterization of naturally occurring gas hydrates in the deep water Gulf of Mexico (GOM). These naturally occurring gas hydrates can cause problems relating to drilling and production of oil and gas, as well as building and operating pipelines. Other objectives of this project are to better understand how natural gas hydrates can affect seafloor stability, to gather data that can be used to study climate change, and to determine how the results of this project can be used to assess if and how gas hydrates act as a trapping mechanism for shallow oil or gas reservoirs. During the first six months of operation, the primary activities of the JIP were to conduct and plan Workshops, which were as follows: (1) Data Collection Workshop--March 2002 (2) Drilling, Coring and Core Analyses Workshop--May 2002 (3) Modeling, Measurement and Sensors Workshop--May 2002.

Steve Holditch; Emrys Jones

2003-01-01T23:59:59.000Z

180

Challenges, uncertainties and issues facing gas production from gas hydrate deposits  

E-Print Network (OSTI)

time frame. The unconventional oil and gas hydrocarbonsare currently no unconventional developments, oil or gas, in

Moridis, G.J.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy System Dynamics Geological & Env. Systems Materials Science Contacts TECHNOLOGIES Oil & Natural Gas Supply Deepwater Technology Enhanced Oil Recovery Gas Hydrates Natural...

182

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy System Dynamics Geological & Env. Systems Materials Science Contacts TECHNOLOGIES Oil & Natural Gas Supply Deepwater Technology Enhanced Oil Recovery Gas Hydrates Natural...

183

Resource Characterization and Quantification of Natural Gas-Hydrate and Associated Free-Gas Accumulations in the Prudhoe Bay - Kuparuk River Area on the North Slope of Alaska  

SciTech Connect

Natural gas hydrates have long been considered a nuisance by the petroleum industry. Hydrates have been hazards to drilling crews, with blowouts a common occurrence if not properly accounted for in drilling plans. In gas pipelines, hydrates have formed plugs if gas was not properly dehydrated. Removing these plugs has been an expensive and time-consuming process. Recently, however, due to the geologic evidence indicating that in situ hydrates could potentially be a vast energy resource of the future, research efforts have been undertaken to explore how natural gas from hydrates might be produced. This study investigates the relative permeability of methane and brine in hydrate-bearing Alaska North Slope core samples. In February 2007, core samples were taken from the Mt. Elbert site situated between the Prudhoe Bay and Kuparuk oil fields on the Alaska North Slope. Core plugs from those core samples have been used as a platform to form hydrates and perform unsteady-steady-state displacement relative permeability experiments. The absolute permeability of Mt. Elbert core samples determined by Omni Labs was also validated as part of this study. Data taken with experimental apparatuses at the University of Alaska Fairbanks, ConocoPhillips laboratories at the Bartlesville Technology Center, and at the Arctic Slope Regional Corporation's facilities in Anchorage, Alaska, provided the basis for this study. This study finds that many difficulties inhibit the ability to obtain relative permeability data in porous media-containing hydrates. Difficulties include handling unconsolidated cores during initial core preparation work, forming hydrates in the core in such a way that promotes flow of both brine and methane, and obtaining simultaneous two-phase flow of brine and methane necessary to quantify relative permeability using unsteady-steady-state displacement methods.

Shirish Patil; Abhijit Dandekar

2008-12-31T23:59:59.000Z

184

NETL: Methane Hydrates - ANS Research Project - Modular Dynamics Tester  

NLE Websites -- All DOE Office Websites (Extended Search)

Well Well Modular Formation Dynamics Tester (MDT) Tool The scientific plan for the Mt. Elbert Prospect includes multiple tests using SchlumbergerÂ’s Modular Formation Dynamics Tester (MDT) tool. This device is deployed on wireline and will be used to sample formation fluids, and measure formation pressure and permeability. The toolÂ’s design involves extension of a sampling probe pad against the borehole wall by backup pistons and the insertion of a smaller test probe a small distance into the formation. The probe is then opened to a sampling chamber within the tool, where fluids from the formation can flow, free of contamination by the borehole fluid. The formation pressure is measured using an extremely accurate gauge that can resolve small pressure differences. The pressure and the rate of fluid flow into the sample chamber can be used to calculate reservoir permeability. Multiple probes can also be used to determine both vertical and horizontal permeability data, which can be used to assess near-wellbore permeability anisotropy (i.e., the degree to which vertical and horizontal permeability within the same reservoir differ). All of these data are useful to engineers interested in predicting the productive capability of a reservoir. Various configurations of the MDT tool can be used to accomplish specific testing goals.

185

LOW TEMPERATURE X-RAY DIFFRACTION STUDIES OF NATURAL GAS HYDRATE SAMPLES FROM THE GULF OF MEXICO  

SciTech Connect

Clathrate hydrates of methane and other small alkanes occur widespread terrestrially in marine sediments of the continental margins and in permafrost sediments of the arctic. Quantitative study of natural clathrate hydrates is hampered by the difficulty in obtaining pristine samples, particularly from submarine environments. Bringing samples of clathrate hydrate from the seafloor at depths without compromising their integrity is not trivial. Most physical property measurements are based on studies of laboratory-synthesized samples. Here we report X-ray powder diffraction measurements of a natural gas hydrate sample from the Green Canyon, Gulf of Mexico. The first data were collected in 2002 and revealed ice and structure II gas hydrate. In the subsequent time the sample has been stored in liquid nitrogen. More recent X-ray powder diffraction data have been collected as functions of temperature and time. This new data indicates that the larger sample is heterogeneous in ice content and shows that the amount of sII hydrate decreases with increasing temperature and time as expected. However, the dissociation rate is higher at lower temperatures and earlier in the experiment.

Rawn, Claudia J [ORNL; Sassen, Roger [Texas A& M University; Ulrich, Shannon M [ORNL; Phelps, Tommy Joe [ORNL; Chakoumakos, Bryan C [ORNL; Payzant, E Andrew [ORNL

2008-01-01T23:59:59.000Z

186

The dynamic response of oceanic hydrate deposits to ocean temperature change  

E-Print Network (OSTI)

phase behavior of water, methane, solid hydrate, ice, andgaseous phase (V), solid hydrate (H), and solid ice (I). Thegaseous phase (V), solid hydrate (H), and solid ice (I). The

Reagan, Matthew T.

2008-01-01T23:59:59.000Z

187

Numerical simulations of depressurization-induced gas production from gas hydrate reservoirs at the Walker Ridge 312 site, northern Gulf of Mexico  

Science Conference Proceedings (OSTI)

In 2009, the Gulf of Mexico (GOM) Gas Hydrates Joint-Industry-Project (JIP) Leg II drilling program confirmed that gas hydrate occurs at high saturations within reservoir-quality sands in the GOM. A comprehensive logging-while-drilling dataset was collected from seven wells at three sites, including two wells at the Walker Ridge 313 site. By constraining the saturations and thicknesses of hydrate-bearing sands using logging-while-drilling data, two-dimensional (2D), cylindrical, r-z and three-dimensional (3D) reservoir models were simulated. The gas hydrate occurrences inferred from seismic analysis are used to delineate the areal extent of the 3D reservoir models. Numerical simulations of gas production from the Walker Ridge reservoirs were conducted using the depressurization method at a constant bottomhole pressure. Results of these simulations indicate that these hydrate deposits are readily produced, owing to high intrinsic reservoir-quality and their proximity to the base of hydrate stability. The elevated in situ reservoir temperatures contribute to high (5–40 MMscf/day) predicted production rates. The production rates obtained from the 2D and 3D models are in close agreement. To evaluate the effect of spatial dimensions, the 2D reservoir domains were simulated at two outer radii. The results showed increased potential for formation of secondary hydrate and appearance of lag time for production rates as reservoir size increases. Similar phenomena were observed in the 3D reservoir models. The results also suggest that interbedded gas hydrate accumulations might be preferable targets for gas production in comparison with massive deposits. Hydrate in such accumulations can be readily dissociated due to heat supply from surrounding hydrate-free zones. Special cases were considered to evaluate the effect of overburden and underburden permeability on production. The obtained data show that production can be significantly degraded in comparison with a case using impermeable boundaries. The main reason for the reduced productivity is water influx from the surrounding strata; a secondary cause is gas escape into the overburden. The results dictate that in order to reliably estimate production potential, permeability of the surroundings has to be included in a model.

Myshakin, Evgeniy M.; Gaddipati, Manohar; Rose, Kelly; Anderson, Brian J.

2012-06-01T23:59:59.000Z

188

Challenges, uncertainties and issues facing gas production from gas hydrate deposits  

E-Print Network (OSTI)

current conventional oil and gas exploration, is gainingface current oil and gas exploration and productionexploration and production activities will be prone to many of the same potential environmental impacts as conventional oil and gas

Moridis, G.J.

2011-01-01T23:59:59.000Z

189

Challenges, uncertainties and issues facing gas production from gas hydrate deposits  

E-Print Network (OSTI)

assessment of United States oil and gas resources on CD-ROM:Assessment of United States Oil and Gas Resources conductedto assess conventional oil and gas resources. In order to

Moridis, G.J.

2011-01-01T23:59:59.000Z

190

Challenges, uncertainties and issues facing gas production from gas hydrate deposits  

E-Print Network (OSTI)

compressibility for coal-bed methane (CBM) reservoirs (Bumband gas, tar sands, coal bed methane etc. can proceed whengas, shale gas, or coal bed methane gas to compete in the

Moridis, G.J.

2011-01-01T23:59:59.000Z

191

Challenges, uncertainties and issues facing gas production from gas hydrate deposits  

E-Print Network (OSTI)

Return as a Function of Gas Price ($/Mscf) for Offshore Gasattractive at prevailing gas prices. This may have an impactrate of return to gas price for the two cases considered.

Moridis, G.J.

2011-01-01T23:59:59.000Z

192

Geological evolution and analysis of confirmed or suspected gas hydrate localities: Volume 10, Basin analysis, formation and stability of gas hydrates of the Aleutian Trench and the Bering Sea  

Science Conference Proceedings (OSTI)

Four major areas with inferred gas hydrates are the subject of this study. Two of these areas, the Navarin and the Norton Basins, are located within the Bering Sea shelf, whereas the remaining areas of the Atka Basin in the central Aleutian Trench system and the eastern Aleutian Trench represent a huge region of the Aleutian Trench-Arc system. All four areas are geologically diverse and complex. Particularly the structural features of the accretionary wedge north of the Aleutian Trench still remain the subjects of scientific debates. Prior to this study, suggested presence of the gas hydrates in the four areas was based on seismic evidence, i.e., presence of bottom simulating reflectors (BSRs). Although the disclosure of the BSRs is often difficult, particularly under the structural conditions of the Navarin and Norton basins, it can be concluded that the identified BSRs are mostly represented by relatively weak and discontinuous reflectors. Under thermal and pressure conditions favorable for gas hydrate formation, the relative scarcity of the BSRs can be attributed to insufficient gas supply to the potential gas hydrate zone. Hydrocarbon gas in sediment may have biogenic, thermogenic or mixed origin. In the four studied areas, basin analysis revealed limited biogenic hydrocarbon generation. The migration of the thermogenically derived gases is probably diminished considerably due to the widespread diagenetic processes in diatomaceous strata. The latter processes resulted in the formation of the diagenetic horizons. The identified gas hydrate-related BSRs seem to be located in the areas of increased biogenic methanogenesis and faults acting as the pathways for thermogenic hydrocarbons.

Krason, J.; Ciesnik, M.

1987-01-01T23:59:59.000Z

193

MethaneHydrateRD_FC.indd  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Academies 2010 One of these is methane hydrate - molecules of natural gas trapped in ice crystals. Containing vast amounts of natural gas, methane hydrate occurs in a variety...

194

Challenges, uncertainties and issues facing gas production from gas hydrate deposits  

E-Print Network (OSTI)

shales, silts, and non-commercial sand stringers above the target GH reservoirs. High gas production

Moridis, G.J.

2011-01-01T23:59:59.000Z

195

Quantum Chemical Analysis of the Excited State Dynamics of Hydrated Electrons  

E-Print Network (OSTI)

Quantum calculations are performed for an anion water cluster representing the first hydration shell of the solvated electron in solution. The absorption spectra from the ground state, the instant excited states and the relaxed excited states are calculated including CI-SD interactions. Analytic expressions for the nonadiabatic relaxation are presented. It is shown that the 50fs dynamics recently observed after s->p excitation is best accounted for if it is identified with the internal conversion, preceded by an adiabatic relaxation within the excited p state. In addition, transient absorptions found in the infrared are qualitatively reproduced by these calculations .

P. O. J. Scherer; Sighart F. Fischer

2006-02-01T23:59:59.000Z

196

Comparison of Kinetic and Equilibrium Reaction Models inSimulating the Behavior of Gas Hydrates in Porous Media  

SciTech Connect

In this study we compare the use of kinetic and equilibrium reaction models in the simulation of gas (methane) hydrates in porous media. Our objective is to evaluate through numerical simulation the importance of employing kinetic versus equilibrium reaction models for predicting the response of hydrate-bearing systems to external stimuli, such as changes in pressure and temperature. Specifically, we (1) analyze and compare the responses simulated using both reaction models for production in various geological settings and for the case of depressurization in a core during extraction; and (2) examine the sensitivity to factors such as initial hydrate saturation, hydrate reaction surface area, and numerical discretization. We find that for systems undergoing thermal stimulation and depressurization, the calculated responses for both reaction models are remarkably similar, though some differences are observed at early times. Given these observations, and since the computational demands for the kinetic reaction model far exceed those for the equilibrium reaction model, the use of the equilibrium reaction model often appears to be justified and preferred for simulating the behavior of gas hydrates.

Kowalsky, Michael B.; Moridis, George J.

2006-05-12T23:59:59.000Z

197

Geomechanical response of permafrost-associated hydrate deposits to depressurization-induced gas production  

E-Print Network (OSTI)

shales, depressurization is rapid and effective, leading to fast hydrate dissociation and considerable cooling during the 5 years of production

Rutqvist, J.

2009-01-01T23:59:59.000Z

198

A practical model to predict gas hydrate formation, dissociation and transportability in oil and gas flowlines.  

E-Print Network (OSTI)

??The oil and gas industry is facing very challenging production issues with offshore explorations in deeper and colder waters. Longer subsea tiebacks will be required… (more)

Zerpa, Luis Eduardo

2013-01-01T23:59:59.000Z

199

Methane Hydrate | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Methane Hydrate Methane Hydrate Methane Hydrate Types of Methane Hydrate Deposits Types of Methane Hydrate Deposits Methane hydrate is a cage-like lattice of ice inside of which are trapped molecules of methane, the chief constituent of natural gas. If methane hydrate is either warmed or depressurized, it will revert back to water and natural gas. When brought to the earth's surface, one cubic meter of gas hydrate releases 164 cubic meters of natural gas. Hydrate deposits may be several hundred meters thick and generally occur in two types of settings: under Arctic permafrost, and beneath the ocean floor. Methane that forms hydrate can be both biogenic, created by biological activity in sediments, and thermogenic, created by geological processes deeper within the earth.

200

The dynamic response of oceanic hydrate deposits to ocean temperature change  

E-Print Network (OSTI)

during transit through the ocean water column Geophys. Res.hydrate in the world's oceans. Global Biogeochem. Cycles, 8,of methane hydrate in ocean sediment. Energy and Fuels, 19,

Reagan, Matthew T.

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Methane Hydrate Research - Geoscience Evaluations and Field Studies Last Reviewed 3182013 Project Goals The primary goals of the DOENETL Natural Gas Hydrate Field Studies...

202

Quantum dynamics of elementary reactions in the gas phase and...  

NLE Websites -- All DOE Office Websites (Extended Search)

Quantum dynamics of elementary reactions in the gas phase and on surfaces Quantum Dynamics of Elementary Reactions in the Gas Phase and on Surfaces Key Challenges: This research...

203

Gas-controlled dynamic vacuum insulation with gas gate  

DOE Patents (OSTI)

Disclosed is a dynamic vacuum insulation comprising sidewalls enclosing an evacuated chamber and gas control means for releasing hydrogen gas into a chamber to increase gas molecule conduction of heat across the chamber and retrieving hydrogen gas from the chamber. The gas control means includes a metal hydride that absorbs and retains hydrogen gas at cooler temperatures and releases hydrogen gas at hotter temperatures; a hydride heating means for selectively heating the metal hydride to temperatures high enough to release hydrogen gas from the metal hydride; and gate means positioned between the metal hydride and the chamber for selectively allowing hydrogen to flow or not to flow between said metal hydride and said chamber. 25 figs.

Benson, D.K.; Potter, T.F.

1994-06-07T23:59:59.000Z

204

Gas-controlled dynamic vacuum insulation with gas gate  

DOE Patents (OSTI)

Disclosed is a dynamic vacuum insulation comprising sidewalls enclosing an evacuated chamber and gas control means for releasing hydrogen gas into a chamber to increase gas molecule conduction of heat across the chamber and retrieving hydrogen gas from the chamber. The gas control means includes a metal hydride that absorbs and retains hydrogen gas at cooler temperatures and releases hydrogen gas at hotter temperatures; a hydride heating means for selectively heating the metal hydride to temperatures high enough to release hydrogen gas from the metal hydride; and gate means positioned between the metal hydride and the chamber for selectively allowing hydrogen to flow or not to flow between said metal hydride and said chamber.

Benson, David K. (Golden, CO); Potter, Thomas F. (Denver, CO)

1994-06-07T23:59:59.000Z

205

Methane Hydrates R&D Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Methane Hydrates R&D Program Methane Hydrates R&D Program Gas hydrates are a naturally-occurring combination of methane gas and water that form under specific conditions of low temperature and high pressure. Once thought to be rare in nature, gas hydrates are now known to occur in great abundance in association with arctic permafrost and in the shallow sediments of the deep-water continental shelves. The most recent estimates of gas hydrate abundance suggest that they contain

206

Feasibility of monitoring gas hydrate production with time-lapse VSP  

E-Print Network (OSTI)

We do not include the ice phase, since ice does not form ingas, liquid, ice or hydrate phases, existing individually orphase theory that considers the existence of two solids (grain and ice

Kowalsky, M.B.

2010-01-01T23:59:59.000Z

207

2H and 13C NMR studies on the temperature-dependent water and protein dynamics in hydrated elastin, myoglobin and collagen  

E-Print Network (OSTI)

2H NMR spin-lattice relaxation and line-shape analyses are performed to study the temperature-dependent dynamics of water in the hydration shells of myoglobin, elastin, and collagen.

S. A. Lusceac; C. R. Herbers; M. Vogel

2009-04-28T23:59:59.000Z

208

Evaluation of the Gas Production Potential of Marine HydrateDeposits in the Ulleung Basin of the Korean East Sea  

Science Conference Proceedings (OSTI)

Although significant hydrate deposits are known to exist in the Ulleung Basin of the Korean East Sea, their survey and evaluation as a possible energy resource has not yet been completed. However, it is possible to develop preliminary estimates of their production potential based on the limited data that are currently available. These include the elevation and thickness of the Hydrate-Bearing Layer (HBL), the water depth, and the water temperature at the sea floor. Based on this information, we developed estimates of the local geothermal gradient that bracket its true value. Reasonable estimates of the initial pressure distribution in the HBL can be obtained because it follows closely the hydrostatic. Other critical information needs include the hydrate saturation, and the intrinsic permeabilities of the system formations. These are treated as variables, and sensitivity analysis provides an estimate of their effect on production. Based on the geology of similar deposits, it is unlikely that Ulleung Basin accumulations belong to Class 1 (involving a HBL underlain by a mobile gas zone). If Class 4 (disperse, low saturation accumulations) deposits are involved, they are not likely to have production potential. The most likely scenarios include Class 2 (HBL underlain by a zone of mobile water) or Class 3 (involving only an HBL) accumulations. Assuming nearly impermeable confining boundaries, this numerical study indicates that large production rates (several MMSCFD) are attainable from both Class 2 and Class 3 deposits using conventional technology. The sensitivity analysis demonstrates the dependence of production on the well design, the production rate, the intrinsic permeability of the HBL, the initial pressure, temperature and hydrate saturation, as well as on the thickness of the water zone (Class 2). The study also demonstrates that the presence of confining boundaries is indispensable for the commercially viable production of gas from these deposits.

Moridis, George J.; Reagan, Matthew T.; Kim, Se-Joon; Seol,Yongkoo; Zhang, Keni

2007-11-16T23:59:59.000Z

209

Determination of mixed hydrate thermodynamics for reservoir modeling.  

E-Print Network (OSTI)

??Natural gas hydrates are likely to contain more carbon than in all other fossil fuel reserves combined worldwide. Most of the natural gas hydrate deposits… (more)

Garapati, Nagasree.

2009-01-01T23:59:59.000Z

210

Hydration structures of U(III) and U(IV) ions from ab initio molecular dynamics simulations  

Science Conference Proceedings (OSTI)

We apply DFT+U-based ab initio molecular dynamics simulations to study the hydration structures of U(III) and U(IV) ions, pertinent to redox reactions associated with uranium salts in aqueous media. U(III) is predicted to be coordinated to 8 water molecules, while U(IV) has a hydration number between 7 and 8. At least one of the innershell water molecules of the hydrated U(IV) complex becomes spontaneously deprotonated. As a result, the U(IV)-O pair correlation function exhibits a satellite peak at 2.15 A associated with the shorter U(IV)-(OH{sup -}) bond. This feature is not accounted for in analysis of extended x-ray absorption fine structure and x-ray adsorption near edge structure measurements, which yield higher estimates of U(IV) hydration numbers. This suggests that it may be useful to include the effect of possible hydrolysis in future interpretation of experiments, especially when the experimental pH is close to the reported hydrolysis equilibrium constant value.

Leung, Kevin; Nenoff, Tina M. [Sandia National Laboratories, MS 1415, Albuquerque, New Mexico 87185 (United States)

2012-08-21T23:59:59.000Z

211

Examination of core samples from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope: Effects of retrieval and preservation  

SciTech Connect

Collecting and preserving undamaged core samples containing gas hydrates from depth is difficult because of the pressure and temperature changes encountered upon retrieval. Hydrate-bearing core samples were collected at the BPXA-DOE-USGS Mount Elbert Gas Hydrate Stratigraphic Test Well in February 2007. Coring was performed while using a custom oil-based drilling mud, and the cores were retrieved by a wireline. The samples were characterized and subsampled at the surface under ambient winter arctic conditions. Samples thought to be hydrate bearing were preserved either by immersion in liquid nitrogen (LN), or by storage under methane pressure at ambient arctic conditions, and later depressurized and immersed in LN. Eleven core samples from hydrate-bearing zones were scanned using x-ray computed tomography to examine core structure and homogeneity. Features observed include radial fractures, spalling-type fractures, and reduced density near the periphery. These features were induced during sample collection, handling, and preservation. Isotopic analysis of the methane from hydrate in an initially LN-preserved core and a pressure-preserved core indicate that secondary hydrate formation occurred throughout the pressurized core, whereas none occurred in the LN-preserved core, however no hydrate was found near the periphery of the LN-preserved core. To replicate some aspects of the preservation methods, natural and laboratory-made saturated porous media samples were frozen in a variety of ways, with radial fractures observed in some LN-frozen sands, and needle-like ice crystals forming in slowly frozen clay-rich sediments. Suggestions for hydrate-bearing core preservation are presented.

Kneafsey, T.J.; Liu, T.J. H.; Winters, W.; Boswell, R.; Hunter, R.; Collett, T.S.

2011-06-01T23:59:59.000Z

212

Analysis of core samples from the BPXA-DOE-USGS Mount Elbert gas hydrate stratigraphic test well: Insights into core disturbance and handling  

Science Conference Proceedings (OSTI)

Collecting and preserving undamaged core samples containing gas hydrates from depth is difficult because of the pressure and temperature changes encountered upon retrieval. Hydrate-bearing core samples were collected at the BPXA-DOE-USGS Mount Elbert Gas Hydrate Stratigraphic Test Well in February 2007. Coring was performed while using a custom oil-based drilling mud, and the cores were retrieved by a wireline. The samples were characterized and subsampled at the surface under ambient winter arctic conditions. Samples thought to be hydrate bearing were preserved either by immersion in liquid nitrogen (LN), or by storage under methane pressure at ambient arctic conditions, and later depressurized and immersed in LN. Eleven core samples from hydrate-bearing zones were scanned using x-ray computed tomography to examine core structure and homogeneity. Features observed include radial fractures, spalling-type fractures, and reduced density near the periphery. These features were induced during sample collection, handling, and preservation. Isotopic analysis of the methane from hydrate in an initially LN-preserved core and a pressure-preserved core indicate that secondary hydrate formation occurred throughout the pressurized core, whereas none occurred in the LN-preserved core, however no hydrate was found near the periphery of the LN-preserved core. To replicate some aspects of the preservation methods, natural and laboratory-made saturated porous media samples were frozen in a variety of ways, with radial fractures observed in some LN-frozen sands, and needle-like ice crystals forming in slowly frozen clay-rich sediments. Suggestions for hydrate-bearing core preservation are presented.

Kneafsey, Timothy J.; Lu, Hailong; Winters, William; Boswell, Ray; Hunter, Robert; Collett, Timothy S.

2009-09-01T23:59:59.000Z

213

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation on  

NLE Websites -- All DOE Office Websites (Extended Search)

Fluid Flow through Heterogeneous Methane-Hydrate Bearing Sand Fluid Flow through Heterogeneous Methane-Hydrate Bearing Sand Fluid Flow through Heterogeneous Methane-Hydrate Bearing Sand: Observations Using X-Ray CT Scanning Authors: Yongkoo Seol and Timothy J. Kneafsey Venue: 6th International Conference on Gas Hydrates (ICGH 2008), Vancouver, British Columbia, CANADA, July 6-10, 2008. http://www.icgh.org/ [external site] Abstract: The effects of porous medium heterogeneity on methane hydrate formation, water flow through the heterogeneous hydrate-bearing sand, and hydrate dissociation were observed in an experiment using a heterogeneous sand column with prescribed heterogeneities. X-ray computed tomography (CT) was used to monitor saturation changes in water, gas, and hydrate during hydrate formation, water flow, and hydrate dissociation. The sand column was packed in several segments having vertical and horizontal layers with two distinct grain-size sands. The CT images showed that as hydrate formed, the water and hydrate saturations were dynamically redistributed by variations in capillary strength of the medium (the tendency for a material to imbibe water), which changed with the presence and saturation of hydrate. Water preferentially flowed through fine sand near higher hydrate-saturation regions where the capillary strength was elevated relative to the lower hydrate saturation regions. Hydrate dissociation initiated by depressurization varied with different grain sizes and hydrate saturations.

214

Gulf of Mexico Gas Hydrate Joint Industry Project Leg II: Walker Ridge 313 LWD Operations and Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Cook Cook 1 , Gilles Guerin 1 , Stefan Mrozewski 1 , Timothy Collett 2 , & Ray Boswell 3 Walker Ridge 313 LWD Operations and Results Gulf of Mexico Gas Hydrate Joint Industry Project Leg II: 1 Borehole Research Group Lamont-Doherty Earth Observatory of Columbia University Palisades, NY 10964 E-mail: Cook: acook@ldeo.columbia.edu Guerin: guerin@ldeo.columbia.edu Mrozewski: stefan@ldeo.columbia.edu 3 National Energy Technology Laboratory U.S. Department of Energy P.O. Box 880 Morgantown, WV 26507 E-mail: ray.boswell@netl.doe.gov 2 US Geological Survey Denver Federal Center, MS-939 Box 25046 Denver, CO 80225 E-mail:

215

Fluid dynamics of sinking carbon dioxide hydrate particle releases for direct ocean carbon sequestration  

E-Print Network (OSTI)

One strategy to remove anthropogenic CO? from the atmosphere to mitigate climate change is by direct ocean injection. Liquid CO? can react with seawater to form solid partially reacted CO? hydrate composite particles (pure ...

Chow, Aaron C. (Aaron Chunghin), 1978-

2008-01-01T23:59:59.000Z

216

Gas production potential of disperse low-saturation hydrate accumulations in oceanic sediments  

E-Print Network (OSTI)

to economically Page viable gas production. The overallare not promising targets for gas production. AcknowledgmentEnergy, Office of Natural Gas and Petroleum Technology,

Moridis, George J.; Sloan, E. Dendy

2006-01-01T23:59:59.000Z

217

International Conference on Gas Hydrates May 19-23, 2002, Yokohama  

E-Print Network (OSTI)

hot fluids exiting a wellbore need to be transported to processing facilities located on the seabed and heating are considered more suitable for distances of a few kilometres. Hot wellbore fluids entering at different flow rates. In a high-pressure flow cell connected at the test unit, hydrate particles can

Gudmundsson, Jon Steinar

218

NETL: Methane Hydrates - DOE/NETL Projects - A New Approach to...  

NLE Websites -- All DOE Office Websites (Extended Search)

of gas hydrate in over 1700 industry wells, this research will directly identify methane hydrate resources, and may identify new potentially commercial hydrate-bearing sand...

219

NETL: Methane Hydrates - DOE/JIP GOM Hydrate Research Cruise  

NLE Websites -- All DOE Office Websites (Extended Search)

Pressurized Coring Equipment Pressure Core Equipment used by the Gulf of Mexico Gas Hydrate JIP Drilling Program Pressure Core Equipment - Photo Gallery One of the key objectives...

220

Fire in the Ice, August 2010 Methane Hydrate Newsletter  

NLE Websites -- All DOE Office Websites (Extended Search)

Figure 1: Simulation results of coupled thermo-dynamic and geomechanical changes around a hot Figure 1: Simulation results of coupled thermo-dynamic and geomechanical changes around a hot production well intersecting an HBS near a sloping seafloor after 30 years of production and heating (Rutqvist and Moridis, 2010). CONTENTS Geohazards of In Situ Gas Hydrates ...........................................1 Behavior of Methane Released in the Deep Ocean.....5 Core-Scale Heterogeneity ............6 Gas Volume Ratios ........................9 The Role of Methane Hydrates in the Earth System ....................12 Announcements .......................15 * Inter-Laboratory Comparison Project * Mississippi Canyon 118 * Research Fellowship * Call for Papers * Call for Abstracts * Upcoming Meetings Spotlight on Research .......... 20 Graham Westbrook CONTACT

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

HydrateNewsIssue2  

NLE Websites -- All DOE Office Websites (Extended Search)

is the physical response of the gas hydrate to depressurization and thermal production stimulation. Cores are being taken from the well, and scientists hope to retrieve at least...

222

A NOVEL CONTINUOUS-FLOW REACTOR FOR GAS HYDRATE Patricia Taboada-Serrano  

E-Print Network (OSTI)

methane­produced water treatment, storage and transportation of natural gas, and gas separations of the guest gas, and by the regulation of operating parameters such as pressure, temperature, reactant ratios natural gas produced water management alternatives in the Wyoming portion of the Powder River Basin

Pennycook, Steve

223

Gas and Dark Matter Spherical Dynamics  

E-Print Network (OSTI)

We investigate the formation of spherical cosmological structures following both dark matter and gas components. We focus on the dynamical aspect of the collapse assuming an adiabatic, $\\gamma = 5/3$, fully ionized primordial plasma. We use for that purpose a fully Lagrangian hydrodynamical code designed to describe highly compressible flows in spherical geometry. We investigate also a "fluid approach" to describe the mean physical quantities of the dark matter flow. We test its validity for a wide range of initial density contrast. We show that an homogeneous isentropic core forms in the gas distribution, surrounded by a self-similar hydrostatic halo, with much higher entropy generated by shock dissipation. We derive analytical expressions for the size, density and temperature of the core, as well as for the surrounding halo. We show that, unless very efficient heating processes occur in the intergalactic medium, we are unable to reproduce within adiabatic models the typical core sizes in X-ray clusters. We also show that, for dynamical reasons only, the gas distribution is naturally antibiased relative to the total mass distribution, without invoking any reheating processes. This could explain why the gas fraction increases with radius in very large X-ray clusters. As a preparation for the next study devoted to the thermodynamical aspect of the collapse, we investigate the initial entropy level required to solve the core problem in X-ray clusters.

Jean-Pierre CHIEZE; Romain Teyssier; Jean-Michel Alimi

1997-04-03T23:59:59.000Z

224

NETL: Methane Hydrates - DOE/JIP GOM Hydrate Research Cruise  

NLE Websites -- All DOE Office Websites (Extended Search)

Pressurized Coring Equipment Pressurized Coring Equipment Pressure Core Equipment used by the Gulf of Mexico Gas Hydrate JIP Drilling Program Pressure Core Equipment - Photo Gallery One of the key objectives of the ChevronTexaco Gulf of Mexico hydrates Joint Industry Project is the collection and analyses of deepwater sediment samples. Because these samples may contain hydrate which is only stable at specific temperature and pressure conditions it is necessary to use specialized sampling equipment. Otherwise, the combination of reduced pressure and increased temperatures as the sample is retrieved through 4,000 feet of gulf seawater will fully dissociate the hydrate, leaving only gas and water. Although techniques exist to infer hydrates presence from distinctive geochemical markers, we have lost the ability to image the nature of hydrate distribution, or to conduct measurements of the various physical and chemical properties of hydrates in the host sediments.

225

The effect of reservoir heterogeneity on gas production from hydrate accumulations in the permafrost  

E-Print Network (OSTI)

and cumulative mass of produced water (M W ). In addition, aquantity of water removed per volume of gas produced at thecumulative water removed, M W , to cumulative gas produced,

Reagan, M. T.

2010-01-01T23:59:59.000Z

226

International Conference on Gas Hydrates May 19-23, 2002, Yokohama  

E-Print Network (OSTI)

established liquefied natural gas technology is only considered feasible in large-scale development. About 80 volume by about 600-times. Large-scale CNG technology suitable for stranded gas is under development technology is being developed in Norway for associated and non-associated natural gas applications

Gudmundsson, Jon Steinar

227

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

on the behavior of gas hydrates in their natural environment under either production (methane gas extraction) or climate change scenarios. This research is closely linked with...

228

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

associated gas hydrate deposits on continental margins by compiling a remote sensing inventory of active gas and oil vents, and completing sea-truth measurement of flux from...

229

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Gas Hydrate Research in Deep Sea Sediments - New Zealand Task Gas Hydrate Research in Deep Sea Sediments - New Zealand Task DE-AI26-06NT42878 Goal The objective of this research is to determine the extent and dynamics of gas hydrate deposits and their relation to areas of focused fluid flux at and beneath the seafloor. Specific objectives include: a). Refine geophysical, geochemical and microbiological technologies for prospecting hydrate distribution and content; b). Contribute to establishing high-priority geographical regions of prospective interest, in terms of methane volume estimates; c). Prediction of environmental effects and geologic risks at the continental margin associated to the natural resource occurrence and resource exploitation; and d). Expand understanding of the biogeochemical parameters and associated microbial community diversity in shallow sediments that influence the porewater sulfate gradient observed through anaerobic oxidation of methane. To accomplish these objectives, the Naval Research Laboratory (NRL) collaborated with New ZealandÂ’s Institute of Geological and Nuclear Sciences (GNS) in a research cruise off the coast of New Zealand. NRL has conducted similar research cruises off the west coast and east coast of the United States, in the Gulf of Mexico and off the coast of Chile.

230

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

area, known as Mississippi Canyon lease block 118, is well-known for the occurrence of methane hydrate and is the location of the University of Mississippis gas hydrate...

231

Methane Hydrates - Mt. Elbert Well Log Data  

NLE Websites -- All DOE Office Websites (Extended Search)

more. Project background information - Alaska North Slope Gas Hydrate Reservoir Characterization - DE-FC26-01NT41332 More information on the National Methane Hydrates R&D Program...

232

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

- Methane Hydrate Research - Geoscience Evaluations and Field Studies Last Reviewed 3/18/2013 - Methane Hydrate Research - Geoscience Evaluations and Field Studies Last Reviewed 3/18/2013 Project Goals The primary goals of the DOE/NETL Natural Gas Hydrate Field Studies (NGHFS) project are: Conduct field-based studies that advance the ability to predict, detect, characterize, and understand distribution of and controls on natural gas hydrate occurrences. Analyze geologic, geochemical, and microbiologic data for indications of past and current changes to the stability of natural gas hydrate in marine settings. Develop links between the U.S. Gas Hydrate Program and international R&D efforts through direct participation in international field programs and workshops. Evaluate the potential role natural gas hydrates may play in the global carbon cycle through analysis of modern and paleo-natural gas

233

Probing the hydration structure of polarizable halides: a multi-edge XAFS and molecular dynamics study of the iodide anion.  

DOE Green Energy (OSTI)

A comprehensive analysis of the H2O structure about aqueous iodide (I-) is reported from molecular dynamics (MD) simulation and x-ray absorption fine structure (XAFS) measurements. XAFS spectra from the iodide K-, L1-, and L3- edges were co-refined to establish the complete structure of the first hydration shell about aqueous I-. The results show approximately 6.3 water molecules located at I-H and I-O distances of 2.65 Ĺ and 3.50 Ĺ, respectively. Whereas the I-O bond is moderately disordered (Debye Waller factor, ?2 = 0.017 Ĺ2) due to the relatively low charge-to-ion radius ratio, the I-H interaction shows even higher disorder (?2 = 0.036 Ĺ2) due to the variable angular orientation of water at the ion surface. Molecular dynamics simulations employing both DFT (+dispersion) and classical potentials generate quite similar structures and they both agree to a large extent with the structure from the experimental XAFS. However the DFT-MD simulations provide a description of molecular structure that is more consistent with the XAFS experiment data. We employ a molecular anaylsis in which we incrementally evaluate the structural contributions from each of the nearest-neighbor water molecules about the iodide to provide a clear picture of the hydrated structure. For the DFT description of molecular interaction, a water molecule in the first shell has more freedom to rotate about the O atom when compared to motions resulting from a classical potential. Further, the hydrogen bonding of first-shell water with the second shell water establishes an strong ordering of the water about I- surface leading to characteristic O-I-O angles of 79 and 142°. This ordering, in addition to the higher coordination number leads to a more symmetric solvation from the DFT-MD configurations relative to the classical potential simulation.

Fulton, John L.; Schenter, Gregory K.; Baer, Marcel; Mundy, Christopher J.; Dang, Liem X.; Balasubramanian, Mahalingam

2010-10-14T23:59:59.000Z

234

Sensitivity Analysis of Gas Production from Class 2 and Class 3 Hydrate Deposits  

E-Print Network (OSTI)

4) cumulative mass of water produced at the well (M W ). Weproduced at the well, V P (solid lines), and the cumulative water-ratio of water removed per volume of gas produced S = phase

Reagan, Matthew

2009-01-01T23:59:59.000Z

235

New Methane Hydrate Research: Investing in Our Energy Future | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Methane Hydrate Research: Investing in Our Energy Future Methane Hydrate Research: Investing in Our Energy Future New Methane Hydrate Research: Investing in Our Energy Future August 31, 2012 - 1:37pm Addthis Methane hydrates are 3D ice-lattice structures with natural gas locked inside. If methane hydrate is either warmed or depressurized, it will release the trapped natural gas. Methane hydrates are 3D ice-lattice structures with natural gas locked inside. If methane hydrate is either warmed or depressurized, it will release the trapped natural gas. Jenny Hakun What Are Methane Hydrates? Methane hydrates are 3D ice-lattice structures with natural gas locked inside. The substance looks remarkably like white ice, but it does not behave like ice. If methane hydrate is either warmed or depressurized, it will release the trapped natural gas.

236

In-Situ Sampling and Characterization of Naturally Occurring Marine Methane Hydrate Using the D/V JOIDES Resolution  

Science Conference Proceedings (OSTI)

The primary accomplishment of the JOI Cooperative Agreement with DOE/NETL in this quarter was the deployment of tools and measurement systems on ODP Leg 204 to study hydrate deposits on Hydrate Ridge, offshore Oregon from July through September, 2002. During Leg 204, we cored and logged 9 sites on the Oregon continental margin to determine the distribution and concentration of gas hydrates in an accretionary ridge and adjacent slope basin, investigate the mechanisms that transport methane and other gases into the gas hydrate stability zone (GHSZ), and obtain constraints on physical properties of hydrates in situ. A 3D seismic survey conducted in 2000 provided images of potential subsurface fluid conduits and indicated the position of the GHSZ throughout the survey region. After coring the first site, we acquired Logging-While-Drilling (LWD) data at all but one site to provide an overview of downhole physical properties. The LWD data confirmed the general position of key seismic stratigraphic horizons and yielded an initial estimate of hydrate concentration through the proxy of in situ electrical resistivity. These records proved to be of great value in planning subsequent coring. The second new hydrate proxy to be tested was infrared thermal imaging of cores on the catwalk as rapidly as possible after retrieval. The thermal images were used to identify hydrate samples and to map estimate the distribution and texture of hydrate within the cores. Geochemical analyses of interstitial waters and of headspace and void gases provide additional information on the distribution and concentration of hydrate within the stability zone, the origin and pathway of fluids into and through the GHSZ, and the rates at which the process of gas hydrate formation is occurring. Bio- and lithostratigraphic description of cores, measurement of physical properties, and in situ pressure core sampling and thermal measurements complement the data set, providing ground-truth tests of inferred physical and sedimentological properties. Among the most interesting preliminary results are: (1) the discovery that gas hydrates are distributed through a broad depth range within the GHSZ and that different physical and chemical proxies for hydrate distribution and concentration give generally consistent results; (2) evidence for the importance of sediment properties for controlling the migration of fluids in the accretionary complex; (3) geochemical indications that the gas hydrate system at Hydrate Ridge contains significant concentrations of higher order hydrocarbons and that fractionation and mixing signals will provide important constraints on gas hydrate dynamics; and (4) the discovery of very high chlorinity values that extend for at least 10 mbsf near the summit, indicating that hydrate formation here must be very rapid.

Frank Rack; Gerhard Bohrmann; Anne Trehu; Michael Storms; Derryl Schroeder; ODP Leg 204 Shipboard Scientific Party

2002-09-30T23:59:59.000Z

237

Modeling the Nanophase Structural Dynamics of Phenylated Sulfonated Poly Ether Ether Ketone Ketone (Ph-SPEEKK) Membranes as a Function of Hydration  

DOE Green Energy (OSTI)

Solvated phenylated sulfonated poly ether ether ketone ketone (Ph-SPEEKK) membranes in the presence of hydronium ions were modeled by classical molecular dynamics simulations. The characterization of the nanophase structure and dynamics of such membranes was carried out as a function of the water content lambda, where lambda is the number of water molecules per sulfonate group, for lambda values of 3.5, 6, 11, 25, and 40. Analysis of pair correlation functions supports the experimental observation of membrane swelling upon hydration as well the increase in water and hydronium ion diffusion with increasing lambda. While the average number of hydrogen bonds between hydronium ions and sulfonate groups is dramatically affected by the hydration level, the average lifetime of the hydrogen bonds remains essentially constant. The membrane is found to be relatively rigid and its overall flexibility shows little dependence on water content. Compared to Nafion, water and ion diffusion coefficients are considerably smaller at lower hydration levels and room temperature. However, at higher lambda values of 25 and 40 these coefficients are comparable to those in Nafion at a lambda value of 16. This study also shows that water diffusion in Ph-SPEEKK membranes at low hydration levels can be significantly improved by raising the temperature with important implications for proton conductivity.

Lins, Roberto D.; Devanathan, Ramaswami; Dupuis, Michel

2011-03-03T23:59:59.000Z

238

BUBBLE DYNAMICS AT GAS-EVOLVING ELECTRODES  

E-Print Network (OSTI)

three dimensional gas dispersions, approxi- mately predicteddispersions of multisized spheres. Sigrist, Dossenbach, and Ibl (17) measured the conductivity of electrolytes containing gas

Sides, Paul J.

2013-01-01T23:59:59.000Z

239

Evaluation of a deposit in the vicinity of the PBU L-106 Site, North Slope, Alaska, for a potential long-term test of gas production from hydrates  

SciTech Connect

As part of the effort to investigate the technical feasibility of gas production from hydrate deposits, a long-term field test (lasting 18-24 months) is under consideration in a project led by the U.S. Department of Energy. We evaluate a candidate deposit involving the C-Unit in the vicinity of the PBU-L106 site in North Slope, Alaska. This deposit is stratigraphically bounded by impermeable shale top and bottom boundaries (Class 3), and is characterized by high intrinsic permeabilities, high porosity, high hydrate saturation, and a hydrostatic pressure distribution. The C-unit deposit is composed of two hydrate-bearing strata separated by a 30-ft-thick shale interlayer, and its temperatrure across its boundaries ranges between 5 and 6.5 C. We investigate by means of numerical simulation involving very fine grids the production potential of these two deposits using both vertical and horizontal wells. We also explore the sensitivity of production to key parameters such as the hydrate saturation, the formation permeability, and the permeability of the bounding shale layers. Finally, we compare the production performance of the C-Unit at the PBU-L106 site to that of the D-Unit accumulation at the Mount Elbert site, a thinner, single-layer Class 3 deposit on the North Slope of Alaska that is shallower, less-pressurized and colder (2.3-2.6 C). The results indicate that production from horizontal wells may be orders of magnitude larger than that from vertical ones. Additionally, production increases with the formation permeability, and with a decreasing permeability of the boundaries. The effect of the hydrate saturation on production is complex and depends on the time frame of production. Because of higher production, the PBU-L106 deposit appears to have an advantage as a candidate for the long-term test.

Moridis, G.J.; Reagan, M.T.; Boyle, K.L.; Zhang, K.

2010-05-01T23:59:59.000Z

240

NETL: Methane Hydrates - DOE/NETL Projects - Kinetic Parameters for the  

NLE Websites -- All DOE Office Websites (Extended Search)

Kinetic Parameters for the Exchange of Hydrate Formers Last Reviewed 12/16/2013 Kinetic Parameters for the Exchange of Hydrate Formers Last Reviewed 12/16/2013 FWP 65213 Goal The overarching goal of this project is to gain an improved understanding of the dynamic processes of gas hydrate accumulations in geologic media by combining laboratory studies, numerical simulation, and analysis of shipboard infrared imaging of hydrate core samples. This project comprises four principal components: (1) fundamental laboratory investigations, (2) numerical simulator development and verification, (3) hydrate core characterization and analysis, and (4) applied laboratory and numerical investigations. Performer Pacific Northwest National Laboratory (PNNL), Richland, Washington Background Numerical Simulation A new simulator in the STOMP simulator series for the production of natural

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Hydration, Swelling, Interlayer Structure, and Hydrogen Bonding in Organolayered Double Hydroxides: Insights from Molecular Dynamics Simulation of Citrate-Intercalated  

E-Print Network (OSTI)

citrate, C6H5O7 3- , as the charge balancing interlayer anion provides new molecular scale insight hydration levels, in contrast to the preferred low hydration states of most LDHs intercalated with small. Introduction Layered double hydroxides (LDHs), also known as hydro- talcite-like compounds, form an important

Kalinichev, Andrey G.

242

NETL: Methane Hydrates - DOE/JIP GOM Hydrate Research Cruise  

NLE Websites -- All DOE Office Websites (Extended Search)

While Drilling Operations The downhole logging while drilling (LWD) operations in the Gulf of Mexico Gas Hydrate JIP Drilling Program (GOM-JIP) was designed in part to obtain...

243

NETL: Methane Hydrates - DOE/NETL Projects - Hydrate-Bearing Clayey  

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Hydrate-Bearing Clayey Sediments: Morphology, Physical Properties, Production and Engineering/Geological Implications Last Reviewed 12/30/2013 Hydrate-Bearing Clayey Sediments: Morphology, Physical Properties, Production and Engineering/Geological Implications Last Reviewed 12/30/2013 DE-FE0009897 Goal The primary goal of this research effort is to contribute to an in-depth understanding of hydrate bearing, fine-grained sediments with a focus on investigation of their potential for hydrate-based gas production. Performer Georgia Tech Research Corporation, Atlanta GA Background Fine-grained sediments host more than 90 percent of global gas hydrate accumulation. Yet hydrate formation in clay-dominated sediments is less understood and characterized than other types of hydrate occurrence. There is an inadequate understanding of hydrate formation mechanisms, segregation structures, hydrate-lense topology, system connectivity, and physical

244

Salt Tectonics and Its Effect on Sediment Structure and Gas Hydrate Occurrence in the Northwestern Gulf of Mexico from 2-D Multichannel Seismic Data  

E-Print Network (OSTI)

This study was undertaken to investigate mobile salt and its effect on fault structures and gas hydrate occurrence in the northwestern Gulf of Mexico. Industry 2-D multichannel seismic data were used to investigate the effects of the salt within an area of 7,577 mi^2 (19,825 km^2) on the Texas continental slope in the northwestern Gulf of Mexico. The western half of the study area is characterized by a thick sedimentary wedge and isolated salt diapirs whereas the eastern half is characterized by a massive and nearly continuous salt sheet topped by a thin sedimentary section. This difference in salt characteristics marks the edge of the continuous salt sheets of the central Gulf of Mexico and is likely a result of westward decline of original salt volume. Beneath the sedimentary wedge in the western part of the survey, an anomalous sedimentary package was found, that is described here as the diapiric, gassy sediment package (DGSP). The DGSP is highly folded at the top and is marked by tall, diapiric features. It may be either deformed shale or the toe of a complex thrust zone detaching the sedimentary wedge from deeper layers. The dataset was searched for the occurrence of bottom simulating reflectors (BSRs), as they are widely accepted as a geophysical indicator of gas trapped beneath gas hydrate deposits, which are known to occur farther east in the Gulf. Although, many seismic signatures were found that suggest widespread occurrence of gas within the upper sediment column, few BSRs were found. Even considering non-traditional definitions of BSRs, only a few occurrences of patchy and isolated BSRs features were identified. The lack of traditional BSRs is likely the result of geologic conditions that make it difficult to recognize gas hydrate deposits. These factors include: (1) unfavorable layer geometries, (2) flow of warm brines from depth, (3) elevated geotherms due to the thermogenic properties of salt and its varying thickness, and (4) widespread low porosity and permeability sediments within the gas hydrate stability zone.

Lewis, Dan'L 1986-

2012-12-01T23:59:59.000Z

245

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

and yield insight into the relative merit of various contemplated production and stimulation methods for gas hydrate. Accomplishments Field Testing (Phase 3) Completion of...

246

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

during NGHP Expedition 01 Background Gas hydrate distribution in sediments depends on methane supply, which in turn depends on fluid flow. When drilling data are available to...

247

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Determine the potential impacts of gas hydrate instability in terms of the release of methane into seafloor sediments, the ocean and the atmosphere. Performers University of...

248

NETL: Methane Hydrates - ANS Research Project  

NLE Websites -- All DOE Office Websites (Extended Search)

Participants The organizations involved in the DOENETL-funded Alaska North Slope Gas Hydrate Reservoir Characterization project, of which the drilling of the Mt. Elbert...

249

NETL: Methane Hydrates - JIP Conference  

NLE Websites -- All DOE Office Websites (Extended Search)

Maurer Technology, Inc.,and Anadarko Petroleum Corp. Geologic Characterization of the Eileen and Tarn Gas Hydrate Accumulations on the North Slope of Alaska PDF- 1.12MB Author:...

250

RESULTS FROM THE (1) DATA COLLECTION WORKSHOP, (2) MODELING WORKSHOP AND (3) DRILLING AND CORING METHODS WORKSHOP AS PART OF THE JOINT INDUSTRY PARTICIPATION (JIP) PROJECT TO CHARACTERIZE NATURAL GAS HYDRATES IN THE DEEPWATER GULF OF MEXICO  

SciTech Connect

In 2000, Chevron began a project to learn how to characterize the natural gas hydrate deposits in the deepwater portions of the Gulf of Mexico. A Joint Industry Participation (JIP) group was formed in 2001, and a project partially funded by the U.S. Department of Energy (DOE) began in October 2001. The primary objective of this project is to develop technology and data to assist in the characterization of naturally occurring gas hydrates in the deepwater Gulf of Mexico. These naturally occurring gas hydrates can cause problems relating to drilling and production of oil and gas, as well as building and operating pipelines. Other objectives of this project are to better understand how natural gas hydrates can affect seafloor stability, to gather data that can be used to study climate change, and to determine how the results of this project can be used to assess if and how gas hydrates act as a trapping mechanism for shallow oil or gas reservoirs. As part of the project, three workshops were held. The first was a data collection workshop, held in Houston during March 14-15, 2002. The purpose of this workshop was to find out what data exist on gas hydrates and to begin making that data available to the JIP. The second and third workshop, on Geoscience and Reservoir Modeling, and Drilling and Coring Methods, respectively, were held simultaneously in Houston during May 9-10, 2002. The Modeling Workshop was conducted to find out what data the various engineers, scientists and geoscientists want the JIP to collect in both the field and the laboratory. The Drilling and Coring workshop was to begin making plans on how we can collect the data required by the project's principal investigators.

Stephen A. Holditch; Emrys Jones

2002-09-01T23:59:59.000Z

251

Heat Flow and Gas Hydrates on the Continental Margin of India: Building on Results from NGHP Expedition 01  

SciTech Connect

The Indian National Gas Hydrate Program (NGHP) Expedition 01 presented the unique opportunity to constrain regional heat flow derived from seismic observations by using drilling data in three regions on the continental margin of India. The seismic bottom simulating reflection (BSR) is a well-documented feature in hydrate bearing sediments, and can serve as a proxy for apparent heat flow if data are available to estimate acoustic velocity and density in water and sediments, thermal conductivity, and seafloor temperature. Direct observations of temperature at depth and physical properties of the sediment obtained from drilling can be used to calibrate the seismic observations, decreasing the uncertainty of the seismically-derived estimates. Anomalies in apparent heat flow can result from a variety of sources, including sedimentation, erosion, topographic refraction and fluid flow. We constructed apparent heat flow maps for portions of the Krishna-Godavari (K-G) basin, the Mahanadi basin, and the Andaman basin and modeled anomalies using 1-D conductive thermal models. Apparent heat flow values in the Krishna-Godavari (K-G) basin and Mahanadi basin are generally 0.035 to 0.055 watts per square meter (W/m2). The borehole data show an increase in apparent heat flow as water depth increases from 900 to 1500 m. In the SW part of the seismic grid, 1D modeling of the effect of sedimentation on heat flow shows that ~50% of the observed increase in apparent heat flow with increasing water depth can be attributed to trapping of sediments behind a "toe-thrust" ridge that is forming along the seaward edge of a thick, rapidly accumulating deltaic sediment pile. The remainder of the anomaly can be explained either by a decrease in thermal conductivity of the sediments filling the slope basin or by lateral advection of heat through fluid flow along stratigraphic horizons within the basin and through flexural faults in the crest of the anticline. Such flow probably plays a role in bringing methane into the ridge formed by the toe-thrust. Because of the small anomaly due to this process and the uncertainty in thermal conductivity, we did not model this process explicitly. In the NE part of the K-G basin seismic grid, a number of local heat flow lows and highs are observed, which can be attributed to topographic refraction and to local fluid flow along faults, respectively. No regional anomaly can be resolved. Because of lack of continuity between the K-G basin sites within the seismic grid and those ~70 km to the NE in water depths of 1200 to 1500 m, we do not speculate on the reason for higher heat flow at these depths. The Mahanadi basin results, while limited in geographic extent, are similar to those for the KG basin. The Andaman basin exhibits much lower apparent heat flow values, ranging from 0.015 to 0.025 W/m2. Heat flow here also appears to increase with increasing water depth. The very low heat flow here is among the lowest heat flow observed anywhere and gives rise to a very thick hydrate stability zone in the sediments. Through 1D models of sedimentation (with extremely high sedimentation rates as a proxy for tectonic thickening), we concluded that the very low heat flow can probably be attributed to the combined effects of high sedimentation rate, low thermal conductivity, tectonic thickening of sediments and the cooling effect of a subducting plate in a subduction zone forearc. Like for the K-G basin, much of the local variability can be attributed to topography. The regional increase in heat flow with water depth remains unexplained because the seismic grid available to us did not extend far enough to define the local tectonic setting of the slope basin controlling this observational pattern. The results are compared to results from other margins, both active and passive. While an increase in apparent heat flow with increasing water depth is widely observed, it is likely a result of different processes in different places. The very low heat flow due to sedimentation and tectonics in the Andaman basin is at the low end of glob

Trehu, Anne; Kannberg, Peter

2011-06-30T23:59:59.000Z

252

Heat Flow and Gas Hydrates on the Continental Margin of India: Building on Results from NGHP Expedition 01  

Science Conference Proceedings (OSTI)

The Indian National Gas Hydrate Program (NGHP) Expedition 01 presented the unique opportunity to constrain regional heat flow derived from seismic observations by using drilling data in three regions on the continental margin of India. The seismic bottom simulating reflection (BSR) is a well-documented feature in hydrate bearing sediments, and can serve as a proxy for apparent heat flow if data are available to estimate acoustic velocity and density in water and sediments, thermal conductivity, and seafloor temperature. Direct observations of temperature at depth and physical properties of the sediment obtained from drilling can be used to calibrate the seismic observations, decreasing the uncertainty of the seismically-derived estimates. Anomalies in apparent heat flow can result from a variety of sources, including sedimentation, erosion, topographic refraction and fluid flow. We constructed apparent heat flow maps for portions of the Krishna-Godavari (K-G) basin, the Mahanadi basin, and the Andaman basin and modeled anomalies using 1-D conductive thermal models. Apparent heat flow values in the Krishna-Godavari (K-G) basin and Mahanadi basin are generally 0.035 to 0.055 watts per square meter (W/m{sup 2}). The borehole data show an increase in apparent heat flow as water depth increases from 900 to 1500 m. In the SW part of the seismic grid, 1D modeling of the effect of sedimentation on heat flow shows that {approx}50% of the observed increase in apparent heat flow with increasing water depth can be attributed to trapping of sediments behind a 'toe-thrust' ridge that is forming along the seaward edge of a thick, rapidly accumulating deltaic sediment pile. The remainder of the anomaly can be explained either by a decrease in thermal conductivity of the sediments filling the slope basin or by lateral advection of heat through fluid flow along stratigraphic horizons within the basin and through flexural faults in the crest of the anticline. Such flow probably plays a role in bringing methane into the ridge formed by the toe-thrust. Because of the small anomaly due to this process and the uncertainty in thermal conductivity, we did not model this process explicitly. In the NE part of the K-G basin seismic grid, a number of local heat flow lows and highs are observed, which can be attributed to topographic refraction and to local fluid flow along faults, respectively. No regional anomaly can be resolved. Because of lack of continuity between the K-G basin sites within the seismic grid and those {approx}70 km to the NE in water depths of 1200 to 1500 m, we do not speculate on the reason for higher heat flow at these depths. The Mahanadi basin results, while limited in geographic extent, are similar to those for the K-G basin. The Andaman basin exhibits much lower apparent heat flow values, ranging from 0.015 to 0.025 W/m{sup 2}. Heat flow here also appears to increase with increasing water depth. The very low heat flow here is among the lowest heat flow observed anywhere and gives rise to a very thick hydrate stability zone in the sediments. Through 1D models of sedimentation (with extremely high sedimentation rates as a proxy for tectonic thickening), we concluded that the very low heat flow can probably be attributed to the combined effects of high sedimentation rate, low thermal conductivity, tectonic thickening of sediments and the cooling effect of a subducting plate in a subduction zone forearc. Like for the K-G basin, much of the local variability can be attributed to topography. The regional increase in heat flow with water depth remains unexplained because the seismic grid available to us did not extend far enough to define the local tectonic setting of the slope basin controlling this observational pattern. The results are compared to results from other margins, both active and passive. While an increase in apparent heat flow with increasing water depth is widely observed, it is likely a result of different processes in different places. The very low heat flow due to sedimentation and tectonics in the Andaman basi

Anne Trehu; Peter Kannberg

2011-06-30T23:59:59.000Z

253

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Detection and Production of Methane Hydrate Last Reviewed 5/15/2012 Detection and Production of Methane Hydrate Last Reviewed 5/15/2012 DE-FC26-06NT42960 Goal The goal of this project is to improve the understanding of regional and local differences in gas hydrate systems from three perspectives: as an energy resource, as a geohazard, and as a long-term influence on global climate. Performers Rice University, Houston, TX University of Texas, Austin, TX Oklahoma State University, Stillwater, OK Background Heterogeneity in the distribution of gas hydrate accumulations impacts all aspects of research into gas hydrate natural systems. The challenge is to delineate, understand, and appreciate these differences at the regional and local scales, where differences in in situ concentrations are relevant to the importance of gas hydrate as a resource, a geohazard, and a factor in

254

Gas Turbine Plant Modeling for Dynamic Simulation.  

E-Print Network (OSTI)

?? Gas turbines have become effective in industrial applications for electric and thermal energy production partly due to their quick response to load variations. A… (more)

Endale Turie, Samson

2012-01-01T23:59:59.000Z

255

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Petrophysical Characterization and Reservoir Simulator for Gas Hydrate Production and Hazard Avoidance in the Gulf of Mexico Petrophysical Characterization and Reservoir Simulator for Gas Hydrate Production and Hazard Avoidance in the Gulf of Mexico DE-FC26-02NT41327 Goal The project goal was to develop new methodologies to characterize the physical properties of methane hydrate and hydrate sediment systems. Performers Westport Technology Center International - Houston, TX University of Houston - Houston, TX Results Project researchers created a pressure cell for measuring acoustic velocity and resistivity on hydrate-sediment cores. They utilized the measurements for input to an existing reservoir model for evaluating possible offshore hydrate accumulations. The organization of an industry-led Advisory Board and the development of a Research Management Plan have been completed. The development of a handbook for transporting, preserving, and storing hydrate core samples brought from the field to the laboratory was completed and distributed for review by industry and researchers.

256

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Characterization and Decomposition Kinetic Studies of Methane Hydrate in Host Sediments under Subsurface Mimic Conditions Last Reviewed 02/17/2010 Characterization and Decomposition Kinetic Studies of Methane Hydrate in Host Sediments under Subsurface Mimic Conditions Last Reviewed 02/17/2010 EST-380-NEDA Goal The purpose of this study is to establish sediment lithology and quantification of methane in hydrates hosted in fine-grained sediments from the Gulf of Mexico (GoM), a marine site of methane hydrate occurrence. The results will help establish a correlation between laboratory data and hydrate accumulation field data on dispersed hydrates in the natural environment. Performer Brookhaven National Laboratory (BNL), Upton, New York 11973 Background Gas hydrates are located in permafrost and marine environments and show potential as a vast methane source worldwide. However, methane is about 17 times more potent a greenhouse gas than CO2 and the inherent instability of

257

2.0 Closed-Domain Hydrate Dissociation (Base Case w/ Hydrate  

NLE Websites -- All DOE Office Websites (Extended Search)

Closed-Domain Hydrate Dissociation (Base Case w/ Hydrate) Closed-Domain Hydrate Dissociation (Base Case w/ Hydrate) 2.1 Problem Description One half of a 20-m, one-dimensional horizontal domain, discretized using uniformly spaced 1-m grid cells (optionally 0.1-m grid cells) is initialized with aqueous-hydrate conditions; whereas, the other half of the domain is initialized with gas-aqueous conditions. As with the Base Case problem, a closed horizontal domain is used to eliminate gravitational body forces and boundary condition effects. The initial conditions are specified to yield complete dissociation of the hydrate, via the thermal capacitance of the domain-half initialized with gas-aqueous conditions. To initialize the aqueous-hydrate half of the domain, temperature, pressure, and hydrate saturation are

258

Methane Hydrate Research and Modeling | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Research and Modeling Clean Coal Carbon Capture and Storage Oil & Gas Methane Hydrate LNG Offshore Drilling Enhanced Oil Recovery Shale Gas Research is focused on understanding...

259

NETL: Methane Hydrates - DOE/JIP GOM Hydrate Research Cruise  

NLE Websites -- All DOE Office Websites (Extended Search)

Cruise Cruise Special Report - Bottom-Simulating Reflections(BSR). Seismic lines from deep continental shelves all around the world contain anomalous reflections known as bottom-simulating reflections(BSR). The reflections mimic the sea-floor topography at a near constant depth below the surface, and commonly cut across geological layers. The nature of the reflection indicates a horizon across which seismic velocity dramatically decreases. At one time, scientists thought the reflection must be due to some mineralogical alteration in the sediment due to heat and pressure. Once the existence of natural methane hydrate was established, BSRs were thought to record the decrease in velocity when passing from hydrate-bearing sediments to those containing only water. Therefore, BSRs were thought to be a direct indicator of hydrate: no BSR meant no hydrate. However, the velocity contrast between hydrate and no-hydrate was determined to be insufficient to cause BSRs. Today, scientists have established that BSRs are an indication of concentrations of free methane gas that is blocked from further upward migration by the presence of methane hydrate in the overlying layers. Consequently, the distribution of BSRs may mark only a subset of the areas containing hydrate.

260

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

Science Conference Proceedings (OSTI)

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project is in the final stages of a cost-shared partnership between Maurer Technology, Noble Corporation, Anadarko Petroleum, and the U.S. Department of Energy's Methane Hydrate R&D program. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition to identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. Hot Ice No. 1 was planned to test the Ugnu and West Sak sequences for gas hydrates and a concomitant free gas accumulation on Anadarko's 100% working interest acreage in section 30 of Township 9N, Range 8E of the Harrison Bay quadrangle of the North Slope of Alaska. The Ugnu and West Sak intervals are favorably positioned in the hydrate-stability zone over an area extending from Anadarko's acreage westward to the vicinity of the aforementioned gas-hydrate occurrences. This suggests that a large, north-to-south trending gas-hydrate accumulation may exist in that area. The presence of gas shows in the Ugnu and West Sak reservoirs in wells situated eastward and down dip of the Hot Ice location indicate that a free-gas accumulation may be trapped by gas hydrates. The Hot Ice No. 1 well was designed to core from the surface to the base of the West Sak interval using the revolutionary and new Arctic Drilling Platform in search of gas hydrate and free gas accumulations at depths of approximately 1200 to 2500 ft MD. A secondary objective was the gas-charged sands of the uppermost Campanian interval at approximately 3000 ft. Summary results of geophysical analysis of the well are presented in this report.

Donn McGuire; Steve Runyon; Richard Sigal; Bill Liddell; Thomas Williams; George Moridis

2005-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

AVESTAR® - Natural Gas Combined Cycle (NGCC) Dynamic Simulator  

NLE Websites -- All DOE Office Websites (Extended Search)

Natural Gas Combined Cycle (NGCC) Dynamic Simulator Natural Gas Combined Cycle (NGCC) Dynamic Simulator A simulator that can provide future engineers with realistic, hands-on experience for operating advanced natural gas combined cycle (NGCC) power plants will soon be available at an innovative U.S. Department of Energy training center. Under a new cooperative research and development agreement signed by the Office of Fossil Energy's National Energy Technology Laboratory (NETL) and Invensys Operations Management, the partners will develop, test, and deploy a dynamic simulator and operator training system (OTS) for a generic NGCC power plant equipped for use with post-combustion carbon capture. NETL will operate the new dynamic simulator/OTS at the AVESTAR (Advanced Virtual Energy Simulation Training and Research) Center in Morgantown, W.Va.

262

Understanding and Control of Combustion Dynamics in Gas Turbine Combustors  

NLE Websites -- All DOE Office Websites (Extended Search)

Control of Combustion Understanding and Control of Combustion Control of Combustion Understanding and Control of Combustion Dynamics in Gas Turbine Combustors Dynamics in Gas Turbine Combustors Georgia Institute of Technology Georgia Institute of Technology Ben T. Zinn, Tim Lieuwen, Yedidia Neumeier, and Ben Bellows SCIES Project 02-01-SR095 DOE COOPERATIVE AGREEMENT DE-FC26-02NT41431 Tom J. George, Program Manager, DOE/NETL Richard Wenglarz, Manager of Research, SCIES Project Awarded (05/01/2002, 36 Month Duration) $452,695 Total Contract Value CLEMSONPRES.PPT, 10/28/2003, B.T. ZINN, T. LIEUWEN, Y. NEUMEIER Gas Turbine Need Gas Turbine Need * Need: Gas turbine reliability and availability is important factor affecting power plant economics - Problem: Combustion driven oscillations severely reduce part life, requiring substantially more frequent outages

263

Comparative Assessment of Advanced Gay Hydrate Production Methods  

Science Conference Proceedings (OSTI)

Displacing natural gas and petroleum with carbon dioxide is a proven technology for producing conventional geologic hydrocarbon reservoirs, and producing additional yields from abandoned or partially produced petroleum reservoirs. Extending this concept to natural gas hydrate production offers the potential to enhance gas hydrate recovery with concomitant permanent geologic sequestration. Numerical simulation was used to assess a suite of carbon dioxide injection techniques for producing gas hydrates from a variety of geologic deposit types. Secondary hydrate formation was found to inhibit contact of the injected CO{sub 2} regardless of injectate phase state, thus diminishing the exchange rate due to pore clogging and hydrate zone bypass of the injected fluids. Additional work is needed to develop methods of artificially introducing high-permeability pathways in gas hydrate zones if injection of CO{sub 2} in either gas, liquid, or micro-emulsion form is to be more effective in enhancing gas hydrate production rates.

M. D. White; B. P. McGrail; S. K. Wurstner

2009-06-30T23:59:59.000Z

264

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Gas Hydrate Production Trial Using CO2 / CH4 Exchange Completed Gas Hydrate Production Trial Using CO2 / CH4 Exchange Completed DE-NT0006553 Goal The goal of this project is to define, plan, conduct and evaluate the results of a field trial of a methane hydrate production methodology whereby carbon dioxide (CO2) molecules are exchanged in situ for methane (CH4) molecules within a hydrate structure, releasing the methane for production. The objective is to evaluate the viability of this hydrate production technique and to understand the implications of the process at a field scale. image showing Conceptual rendering of proposed CO2 - CH4 exchange methodology for the production of natural gas from hydrates Conceptual rendering of proposed CO2 - CH4 exchange methodology for the

265

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Heat flow and gas hydrates on the continental margin of India Last Reviewed 12/15/2011 Heat flow and gas hydrates on the continental margin of India Last Reviewed 12/15/2011 DE-NT0005669 Goal The goals of this project are to construct maps of apparent and residual heat flow through the western continental margin of India and to investigate the relationship of residual heat flow anomalies to fluid flow and gas hydrate distribution in the subsurface. Performer Oregon State University, College of Oceanic and Atmospheric Science, Corvallis, OR 97331 Map of the four regions sampled during NGHP Expedition 01 Map of the four regions sampled during NGHP Expedition 01 Background Gas hydrate distribution in sediments depends on methane supply, which in turn depends on fluid flow. When drilling data are available to calibrate seismic observations of the base of the gas hydrate stability zone (GHSZ),

266

NETL: Methane Hydrates - Methane Hydrate Reference Shelf  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrates Primer provides background and general information about the history of hydrate R&D, the science of methane hydrates, their occurrences, and R&D related issues. Photo...

267

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation on Gas  

NLE Websites -- All DOE Office Websites (Extended Search)

Gas Hydrate Research and Stratigraphic Test Results, Milne Point Unit, Alaska North Slope Gas Hydrate Research and Stratigraphic Test Results, Milne Point Unit, Alaska North Slope Gas Hydrate Research and Stratigraphic Test Results, Milne Point Unit, Alaska North Slope Authors: Robert Hunter (ASRC Energy), Scott Digert (BPXA), Tim Collett (USGS), Ray Boswell (USDOE) Venue: AAPG National Meeting Gas Hydrate session, Oral Presentation, San Antonio, TX, April 22, 2008 (http://www.AAPG.org [external site]) Abstract: This BP-DOE collaborative research project is helping determine whether or not gas hydrate can become a technically and economically recoverable gas resource. Reservoir characterization, development modeling, and associated studies indicate that 0-0.34 trillion cubic meters (TCM) gas may be technically recoverable from the estimated 0.92 TCM gas-in-place within the Eileen gas hydrate accumulation on the Alaska North Slope (ANS). Reservoir modeling indicates sufficient potential for technical recovery to justify proceeding into field operations to acquire basic reservoir and fluid data from the Mount Elbert gas hydrate prospect in the Milne Point Unit (MPU). Successful drilling and data acquisition in the Mount Elbert-01 stratigraphic test well was completed during February 3-19, 2007. Data was acquired from 131 meters of core (30.5 meters gas hydrate-bearing), extensive wireline logging, and wireline production testing operations using Modular Dynamics Testing (MDT). The stratigraphic test validated the 3D seismic interpretation of the MPU gas hydrate-bearing Mount Elbert prospect. Onsite core sub- sampling preserved samples for later analyses of interstitial water geochemistry, physical properties, thermal properties, organic geochemistry, petrophysics, and mechanical properties. MDT testing was accomplished within two gas hydrate-bearing intervals, and acquired during four long shut-in period tests. Four gas samples and one pre-gas hydrate dissociation formation water sample were collected. MDT analyses are helping to improve understanding of gas hydrate dissociation, gas production, formation cooling, and long-term production potential as well as help calibrate reservoir simulation models.

268

NETL: Methane Hydrates - Methane Hydrate Library  

NLE Websites -- All DOE Office Websites (Extended Search)

Texas A&M University - Geochemical & Research Environmental Group(GERG) - Gulf of Mexico Blue Mound w Tube Worms bulk hydrate sample oil slick showing possible hydrate location...

269

Detection and Production of Methane Hydrate  

NLE Websites -- All DOE Office Websites (Extended Search)

July-September 2007 July-September 2007 Detection and Production of Methane Hydrate Submitted by: Rice University University of Houston George J. Hirasaki Department of Chemical and Biomolecular Engineering Rice University - MS 362 6100 Main St. Houston, TX 77251-1892 Phone: 713-348-5416; FAX: 713-348-5478; Email: gjh@rice.edu Prepared for: United States Department of Energy National Energy Technology Laboratory December, 2007 Office of Fossil Energy Table of Contents DOE Methane Hydrate Program Peer Review.................................................. 3 Task 5: Carbon Inputs and Outputs to Gas Hydrate Systems ........................... 3 Task 6: Numerical Models for Quantification of Hydrate and Free Gas Accumulations....................................................................................................

270

Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluation of Technology and Potential  

E-Print Network (OSTI)

Assessment of U.S. Oil and Gas Resources (on CD-ROM) (Petroleum Geology, Atlas of Oil and Gas Fields, Structuraland logging conventional oil and gas wells. The ability to

Moridis, George J.

2008-01-01T23:59:59.000Z

271

NETL: Methane Hydrates - DOE/NETL Projects - NT42496  

NLE Websites -- All DOE Office Websites (Extended Search)

Studies of Natural Gas Hydrates to Support the DOE Efforts to Evaluate and Understand Methane Hydrates Last Reviewed 05162011 DE-AI26-05NT42496 Goal The United States Geological...

272

Complex admixtures of clathrate hydrates in a water desalination method  

DOE Patents (OSTI)

Disclosed is a method that achieves water desalination by utilizing and optimizing clathrate hydrate phenomena. Clathrate hydrates are crystalline compounds of gas and water that desalinate water by excluding salt molecules during crystallization. Contacting a hydrate forming gaseous species with water will spontaneously form hydrates at specific temperatures and pressures through the extraction of water molecules from the bulk phase followed by crystallite nucleation. Subsequent dissociation of pure hydrates yields fresh water and, if operated correctly, allows the hydrate-forming gas to be efficiently recycled into the process stream.

Simmons, Blake A. (San Francisco, CA); Bradshaw, Robert W. (Livermore, CA); Dedrick, Daniel E. (Berkeley, CA); Anderson, David W. (Riverbank, CA)

2009-07-14T23:59:59.000Z

273

Petrographic, Mineralogic, and Geochemical Studies of Hydrocarbon-derived Authigenic Carbonate Rock from Gas Venting, Seepage, Free Gas, and Gas Hydrate Sites in the Gulf of Mexico and offshore India  

E-Print Network (OSTI)

Authigenic carbonate rock (ACR) is derived from microbial oxidation of methane, biodegradation of crude oil, and oxidation of sedimentary organic matter. The precipitation of ACR was characterized petrographically, mineralogically, and geochemically. ACR collected from the seafloor in the Gulf of Mexico (GOM) and ACR recovered from drilled cores in the Krishna-Godawari (KG) basin offshore India were used. All study sites are associated with hydrocarbon gas venting, seepage, free gas, or gas hydrate. ACR from the GOM is densely cemented and extremely irregular in shape, whereas ACR from offshore India is generally an oval-shaped smooth nodule and also densely cemented. The dominant mineral in ACR is authigenic calcite. ACR contains carbon derived from sedimentary organic carbon oxidation that geologically sequesters much fossil carbon. Bulk carbon and oxygen isotopes of ACR were measured. ACR from the GOM is strongly depleted in 13C with ?13C of ?42.5? and enriched in 18O with ?18O of 4.67?. The ?13C of hydrocarbon is typically more depleted in 13C than in the associated ACR. The reason is that authigenic carbonate cements from hydrocarbon oxidation generally enclose skeletal material characterized by normal marine carbonate. Three groups that represent different hydrocarbon sources to ACR were classified in this study: primary carbon sources to ACR from (1) methane plus biodegraded oil, (2) methane, or (3) biodegraded oil. Wide ranges in ?13C (?49.12 to 14.06?) and ?18O ( 1.27 to 14.06?) were observed in ACR from offshore India. In sediments, the ?13C may be affected by differences in the rate of organic carbon oxidation, which generate varying ?13C with depth during methanogenesis. Based on the wide range in ?13C, ACR from offshore India was classified: (1) ?13C may reflect high rates of organic carbon oxidation, (2) ACR may be derived primarily from methane oxidation, and (3) ?13C may reflect low rates of organic carbon oxidation. ?18O values are heavier than those of normal marine carbonates. The ?18O may be caused by reaction with deep-sourced water that was isotopically heavier than ambient seawater. Some samples may reflect heavy ?18O from gas hydrate decomposition, but it would not cause significant heavy oxygen isotopes.

Jung, Woodong

2008-12-01T23:59:59.000Z

274

Methane Hydrate Production Feasibility | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Production Feasibility Production Feasibility Methane Hydrate Production Feasibility The red curves are temperature profiles for various water depths; the blue line shows methane hydrate stability relative to temperature and pressure. The area enclosed by the two curves represents the area of methane hydrate stability. The red curves are temperature profiles for various water depths; the blue line shows methane hydrate stability relative to temperature and pressure. The area enclosed by the two curves represents the area of methane hydrate stability. Methane, the predominant component of natural gas, forms hydrate in the presence of water, low temperatures and high pressures. Alternatively, when the temperature is increased or the pressure decreased so that hydrates are outside their stability field, they dissociate into methane and water.

275

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Interrelation of Global Climate and the Response of Oceanic Hydrate Accumulations Last Reviewed 8/21/2013 Interrelation of Global Climate and the Response of Oceanic Hydrate Accumulations Last Reviewed 8/21/2013 Field Work Proposals: ESD07-014 (LBNL) and 08FE-003 (LANL) Project Goal The primary objectives of this project are to: 1) investigate the effect of rising water temperatures on the stability of oceanic hydrate accumulations, 2) estimate the global quantity of hydrate-originating carbon that could reach the upper atmosphere as CH4 or CO2 thus affecting global climate, 3) quantify the interrelationship between global climate and the amount of hydrate-derived carbon reaching the upper atmosphere focusing on the potential link between hydrate dissociation and cascading global warming and 4) test the discharge phase of the Clathrate Gun Hypothesis which stipulates large-scale hydrate dissociation and gas

276

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

– Formation and Dissociation of Methane Hydrates Last Reviewed 07/7/2011 – Formation and Dissociation of Methane Hydrates Last Reviewed 07/7/2011 Project Objective Observe hydrate formation and dissociation phenomena in various porous media and characterize hydrate-bearing sediments by estimating physical properties (kinetic parameters for hydrate formation and dissociation, thermal conductivity, permeability, relative permeability, and mechanical strength) to enhance fundamental understanding on hydrate formation and accumulation and to support numerical simulations and potential gas hydrate production Project Performers Yongkoo Seol – NETL Office of Research & Development Jeong Choi – Oak Ridge Institute for Science and Education Jongho Cha-Virginia Polytech Institute Project Location National Energy Technology Laboratory - Morgantown, West Virginia

277

Methane Recovery from Hydrate-bearing Sediments  

Science Conference Proceedings (OSTI)

Gas hydrates are crystalline compounds made of gas and water molecules. Methane hydrates are found in marine sediments and permafrost regions; extensive amounts of methane are trapped in the form of hydrates. Methane hydrate can be an energy resource, contribute to global warming, or cause seafloor instability. This study placed emphasis on gas recovery from hydrate bearing sediments and related phenomena. The unique behavior of hydrate-bearing sediments required the development of special research tools, including new numerical algorithms (tube- and pore-network models) and experimental devices (high pressure chambers and micromodels). Therefore, the research methodology combined experimental studies, particle-scale numerical simulations, and macro-scale analyses of coupled processes. Research conducted as part of this project started with hydrate formation in sediment pores and extended to production methods and emergent phenomena. In particular, the scope of the work addressed: (1) hydrate formation and growth in pores, the assessment of formation rate, tensile/adhesive strength and their impact on sediment-scale properties, including volume change during hydrate formation and dissociation; (2) the effect of physical properties such as gas solubility, salinity, pore size, and mixed gas conditions on hydrate formation and dissociation, and it implications such as oscillatory transient hydrate formation, dissolution within the hydrate stability field, initial hydrate lens formation, and phase boundary changes in real field situations; (3) fluid conductivity in relation to pore size distribution and spatial correlation and the emergence of phenomena such as flow focusing; (4) mixed fluid flow, with special emphasis on differences between invading gas and nucleating gas, implications on relative gas conductivity for reservoir simulations, and gas recovery efficiency; (5) identification of advantages and limitations in different gas production strategies with emphasis; (6) detailed study of CH4-CO2 exchange as a unique alternative to recover CH4 gas while sequestering CO2; (7) the relevance of fines in otherwise clean sand sediments on gas recovery and related phenomena such as fines migration and clogging, vuggy structure formation, and gas-driven fracture formation during gas production by depressurization.

J. Carlos Santamarina; Costas Tsouris

2011-04-30T23:59:59.000Z

278

Overview on Hydrate Coring, Handling and Analysis  

SciTech Connect

Gas hydrates are crystalline, ice-like compounds of gas and water molecules that are formed under certain thermodynamic conditions. Hydrate deposits occur naturally within ocean sediments just below the sea floor at temperatures and pressures existing below about 500 meters water depth. Gas hydrate is also stable in conjunction with the permafrost in the Arctic. Most marine gas hydrate is formed of microbially generated gas. It binds huge amounts of methane into the sediments. Worldwide, gas hydrate is estimated to hold about 1016 kg of organic carbon in the form of methane (Kvenvolden et al., 1993). Gas hydrate is one of the fossil fuel resources that is yet untapped, but may play a major role in meeting the energy challenge of this century. In June 2002, Westport Technology Center was requested by the Department of Energy (DOE) to prepare a ''Best Practices Manual on Gas Hydrate Coring, Handling and Analysis'' under Award No. DE-FC26-02NT41327. The scope of the task was specifically targeted for coring sediments with hydrates in Alaska, the Gulf of Mexico (GOM) and from the present Ocean Drilling Program (ODP) drillship. The specific subjects under this scope were defined in 3 stages as follows: Stage 1: Collect information on coring sediments with hydrates, core handling, core preservation, sample transportation, analysis of the core, and long term preservation. Stage 2: Provide copies of the first draft to a list of experts and stakeholders designated by DOE. Stage 3: Produce a second draft of the manual with benefit of input from external review for delivery. The manual provides an overview of existing information available in the published literature and reports on coring, analysis, preservation and transport of gas hydrates for laboratory analysis as of June 2003. The manual was delivered as draft version 3 to the DOE Project Manager for distribution in July 2003. This Final Report is provided for records purposes.

Jon Burger; Deepak Gupta; Patrick Jacobs; John Shillinglaw

2003-06-30T23:59:59.000Z

279

Gas-Phase Molecular Dynamics: High Resolution Spectroscopy and Collision Dynamics of Transient Species  

SciTech Connect

This research is carried out as part of the Gas-Phase Molecular Dynamics program in the Chemistry Department at Brookhaven National Laboratory. High-resolution spectroscopy, augmented by theoretical and computational methods, is used to investigate the structure and collision dynamics of chemical intermediates in the elementary gas-phase reactions involved in combustion chemistry. Applications and methods development are equally important experimental components of this work.

Hall,G.E.; Sears, T.J.

2009-04-03T23:59:59.000Z

280

Assessment of Gas Turbine Combustion Dynamics Monitoring Technologies: Interim Report  

Science Conference Proceedings (OSTI)

This report examines commercially available combustion dynamics monitoring systems (CDMS) and monitoring centers for use on gas turbine engines, specifically 7FA, 501F/5000F/8000H engines. The report provides a current review of combustion monitoring issues and methods, details of operation and available features for various CDMS, including, interviews with equipment suppliers and monitoring center providers, and end-user interviews.BackgroundGas turbines are ...

2013-12-18T23:59:59.000Z

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
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281

NETL: Methane Hydrates - DOE/NETL Projects - Advanced Hydrate Reservoir  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Hydrate Reservoir Modeling Using Rock Physics Techniques Last Reviewed 11/29/2013 Advanced Hydrate Reservoir Modeling Using Rock Physics Techniques Last Reviewed 11/29/2013 DE-FE0010160 Goal The primary goal of this research is to develop analytical techniques capable of quantitatively evaluating the nature of methane hydrate reservoir systems through modeling of their acoustic response using techniques that integrate rock physics theory, amplitude analysis, and spectral decomposition. Performers Fugro GeoConsulting, Inc., Houston TX Background Past efforts under the DOE-supported Gulf of Mexico Joint Industry project included the selection of well locations utilizing prospectivity analysis based primarily on a petroleum systems approach for gas hydrate using 3-D exploration seismic data and derivative analyses that produced predicted

282

An Approximate Dynamic Programming Approach to Benchmark Practice-Based Heuristics for Natural Gas Storage Valuation  

Science Conference Proceedings (OSTI)

The valuation of the real option to store natural gas is a practically important problem that entails dynamic optimization of inventory trading decisions with capacity constraints in the face of uncertain natural gas price dynamics. Stochastic dynamic ... Keywords: Markov, asset pricing, dynamic programming, finance, heuristics, industries, petroleum/natural gas, real options, storage valuation, upper bounds

Guoming Lai; François Margot; Nicola Secomandi

2010-05-01T23:59:59.000Z

283

GAS-PHASE MOLECULAR DYNAMICS: VIBRATIONAL DYNAMICS OF POLYATOMIC MOLECULES  

SciTech Connect

The goal of this research is the understanding of elementary chemical and physical processes important in the combustion of fossil fuels. Interest centers on reactions and properties of short-lived chemical intermediates. High-resolution, high-sensitivity, laser absorption methods are augmented by high-temperature, flow-tube reaction kinetics studies with mass-spectrometric sampling. These experiments provide information on the energy levels, structures and reactivity of molecular free radical species and, in turn, provide new tools for the study of energy flow and chemical bond cleavage in radicals involved in chemical systems. The experimental work is supported by theoretical studies using time-dependent quantum wavepacket calculations, which provide insight into energy flow among the vibrational modes of polyatomic molecules and interference effects in multiple-surface dynamics.

MUCKERMAN,J.T.

1999-06-09T23:59:59.000Z

284

Gas-Phase Molecular Dynamics: Vibrational Dynamics of Polyatomic Molecules  

SciTech Connect

The goal of this research is the understanding of elementary chemical and physical processes important in the combustion of fossil fuels. Interest centers on reactions and properties of short-lived chemical intermediates. High-resolution, high-sensitivity, laser absorption methods are augmented by high- temperature, flow-tube reaction kinetics studies with mass-spectrometic sampling. These experiments provide information on the energy levels, structures and reactivity of molecular free radical species and in turn, provide new tools for the study of energy flow and chemical bond cleavage in the radicals involved in chemical systems. The experimental work is supported by theoretical studies using time-dependent quantum wavepacket calculations, which provide insight into energy flow among the vibrational modes of polyatomic molecules and interference effects in multiple-surface dynamics.

Muckerman, J.T.

1999-05-21T23:59:59.000Z

285

Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluation of Technology and Potential  

E-Print Network (OSTI)

Department of Energy, Office of Fossil Energy, July 2006 (Assistant Secretary for Fossil Energy, Office of Natural Gas

Moridis, George J.

2008-01-01T23:59:59.000Z

286

Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluation of Technology and Potential  

E-Print Network (OSTI)

oil and gas reservoirs, or even to the large (and rapidly increasing) data-base of information on unconventional

Moridis, George J.

2008-01-01T23:59:59.000Z

287

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

Science Conference Proceedings (OSTI)

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project is in the final stages of a cost shared partnership between Maurer Technology, Noble Corporation, Anadarko Petroleum, and the U.S. Department of Energy's Methane Hydrate R&D program. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition to identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. The work scope drilled and cored a well The HOT ICE No.1 on Anadarko leases beginning in FY 2003 and completed in 2004. An on-site core analysis laboratory was built and utilized for determining the physical characteristics of the hydrates and surrounding rock. The well was drilled from a new Anadarko Arctic Platform that has a minimal footprint and environmental impact. The final efforts of the project are to correlate geology, geophysics, logs, and drilling and production data and provide this information to scientists developing reservoir models. No gas hydrates were encountered in this well; however, a wealth of information was generated and is contained in this report.

Thomas E. Williams; Keith Millheim; Buddy King

2004-06-01T23:59:59.000Z

288

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

Science Conference Proceedings (OSTI)

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project is in the final stages of a cost shared partnership between Maurer Technology, Noble Corporation, Anadarko Petroleum, and the U.S. Department of Energy's Methane Hydrate R&D program. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition to identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. The work scope drilled and cored a well The HOT ICE No.1 on Anadarko leases beginning in FY 2003 and completed in 2004. An on-site core analysis laboratory was built and utilized for determining the physical characteristics of the hydrates and surrounding rock. The well was drilled from a new Anadarko Arctic Platform that has a minimal footprint and environmental impact. The final efforts of the project are to correlate geology, geophysics, logs, and drilling and production data and provide this information to scientists developing reservoir models. No gas hydrates were encountered in this well; however, a wealth of information was generated and is contained in this report.

Thomas E. Williams; Keith Millheim; Buddy King

2004-07-01T23:59:59.000Z

289

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

SciTech Connect

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Oil-field engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in Arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrates agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project is a cost-shared partnership between Maurer Technology, Anadarko Petroleum, Noble Corporation, and the U.S. Department of Energy's Methane Hydrate R&D program. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition to help identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. As part of the project work scope, team members drilled and cored the HOT ICE No. 1 on Anadarko leases beginning in January 2003 and completed in March 2004. Due to scheduling constraints imposed by the Arctic drilling season, operations at the site were suspended between April 21, 2003 and January 30, 2004. An on-site core analysis laboratory was designed, constructed and used for determining physical characteristics of frozen core immediately after it was retrieved from the well. The well was drilled from a new and innovative Anadarko Arctic Platform that has a greatly reduced footprint and environmental impact. Final efforts of the project were to correlate geology, geophysics, logs, and drilling and production data and provide this information to scientists for future hydrate operations. Unfortunately, no gas hydrates were encountered in this well; however, a wealth of information was generated and is contained in the project reports.

Thomas E. Williams; Keith Millheim; Bill Liddell

2005-03-01T23:59:59.000Z

290

HydrateNewsIssue2  

NLE Websites -- All DOE Office Websites (Extended Search)

1 1 T H E N A T I O N A L E N E R G Y T E C H N O L O G Y L A B O R A T O R Y M E T H A N E H Y D R A T E N E W S L E T T E R Announcements ChevronTexaco Gulf of Mexico Gas Hydrates Joint Industry Project Naturally Occurring Gas Hydrate Data Collection Workshop March 14-15, 2002, Adam's Mark Hotel, Houston, Texas The ChevronTexaco Gulf of Mexico Gas Hydrates Joint Industry Project (JIP), in collaboration with the U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL), will be holding a workshop to collect data on naturally occurring hydrates in the Gulf of Mexico (GOM). All key contributors to the understanding of naturally occurring hydrates are invited to apply to participate in the first of three workshops sponsored by the JIP. The purpose of the workshop is to develop a clear understanding of what

291

Gas-cooling by dust during dynamical fragmentation  

E-Print Network (OSTI)

We suggest that the abrupt switch, from hierarchical clustering on scales larger than 0.04 pc, to binary (and occasionally higher multiple) systems on smaller scales, which Larson has deduced from his analysis of the grouping of pre-Main-Sequence stars in Taurus, arises because pre-protostellar gas becomes thermally coupled to dust at sufficiently high densities. The resulting change from gas-cooling by molecular lines at low densities to gas-cooling by dust at high densities enables the matter to radiate much more efficiently, and hence to undergo dynamical fragmentation. We derive the domain where gas-cooling by dust facilitates dynamical fragmentation. Low-mass (i.e. solar mass) clumps - those supported mainly by thermal pressure - can probably access this domain spontaneously, albeit rather quasistatically, provided they exist in a region where external perturbations are few and far between. More massive clumps probably require an impulsive external perturbation, for instance a supersonic collision with another clump, in order for the gas to reach sufficiently high density to couple thermally to the dust. Impulsive external perturbations should promote fragmentation, by generating highly non-line ar substructures which can then be amplified by gravity during the subsequent collapse.

A. P. Whitworth; H. M. J. Boffin; N. Francis

1998-04-30T23:59:59.000Z

292

Multiple stage multiple filter hydrate store  

DOE Patents (OSTI)

An improved hydrate store for a metal halogen battery system is disclosed which employs a multiple stage, multiple filter means for separating the halogen hydrate from the liquid used in forming the hydrate. The filter means is constructed in the form of three separate sections which combine to substantially cover the interior surface of the store container. Exit conduit means is provided in association with the filter means for transmitting liquid passing through the filter means to a hydrate former subsystem. The hydrate former subsystem combines the halogen gas generated during the charging of the battery system with the liquid to form the hydrate in association with the store. Relief valve means is interposed in the exit conduit means for controlling the operation of the separate sections of the filter means, such that the liquid flow through the exit conduit means from each of the separate sections is controlled in a predetermined sequence. The three separate sections of the filter means operate in three discrete stages to provide a substantially uniform liquid flow to the hydrate former subsystem during the charging of the battery system. The separation of the liquid from the hydrate causes an increase in the density of the hydrate by concentrating the hydrate along the filter means. 7 figs.

Bjorkman, H.K. Jr.

1983-05-31T23:59:59.000Z

293

Desalination utilizing clathrate hydrates (LDRD final report).  

DOE Green Energy (OSTI)

Advances are reported in several aspects of clathrate hydrate desalination fundamentals necessary to develop an economical means to produce municipal quantities of potable water from seawater or brackish feedstock. These aspects include the following, (1) advances in defining the most promising systems design based on new types of hydrate guest molecules, (2) selection of optimal multi-phase reactors and separation arrangements, and, (3) applicability of an inert heat exchange fluid to moderate hydrate growth, control the morphology of the solid hydrate material formed, and facilitate separation of hydrate solids from concentrated brine. The rate of R141b hydrate formation was determined and found to depend only on the degree of supercooling. The rate of R141b hydrate formation in the presence of a heat exchange fluid depended on the degree of supercooling according to the same rate equation as pure R141b with secondary dependence on salinity. Experiments demonstrated that a perfluorocarbon heat exchange fluid assisted separation of R141b hydrates from brine. Preliminary experiments using the guest species, difluoromethane, showed that hydrate formation rates were substantial at temperatures up to at least 12 C and demonstrated partial separation of water from brine. We present a detailed molecular picture of the structure and dynamics of R141b guest molecules within water cages, obtained from ab initio calculations, molecular dynamics simulations, and Raman spectroscopy. Density functional theory calculations were used to provide an energetic and molecular orbital description of R141b stability in both large and small cages in a structure II hydrate. Additionally, the hydrate of an isomer, 1,2-dichloro-1-fluoroethane, does not form at ambient conditions because of extensive overlap of electron density between guest and host. Classical molecular dynamics simulations and laboratory trials support the results for the isomer hydrate. Molecular dynamics simulations show that R141b hydrate is stable at temperatures up to 265K, while the isomer hydrate is only stable up to 150K. Despite hydrogen bonding between guest and host, R141b molecules rotated freely within the water cage. The Raman spectrum of R141b in both the pure and hydrate phases was also compared with vibrational analysis from both computational methods. In particular, the frequency of the C-Cl stretch mode (585 cm{sup -1}) undergoes a shift to higher frequency in the hydrate phase. Raman spectra also indicate that this peak undergoes splitting and intensity variation as the temperature is decreased from 4 C to -4 C.

Simmons, Blake Alexander; Bradshaw, Robert W.; Dedrick, Daniel E.; Cygan, Randall Timothy (Sandia National Laboratories, Albuquerque, NM); Greathouse, Jeffery A. (Sandia National Laboratories, Albuquerque, NM); Majzoub, Eric H. (University of Missouri, Columbia, MO)

2008-01-01T23:59:59.000Z

294

International Cooperation in Methane Hydrates | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Oil & Gas » Methane Hydrate » Oil & Gas » Methane Hydrate » International Cooperation in Methane Hydrates International Cooperation in Methane Hydrates In 1982 the multi-national Deep Sea Drilling Program (DSDP) recovered the first subsea substantial methane hydrate deposits, which spurred methane hydrate research in the US and other countries. The successor programs, the Ocean Drilling Program (ODP) and the Integrated Ocean Drilling Program (IODP) sampled hydrate deposits off Oregon (ODP 204, 2002) and in the Cascadia Margin off Vancouver Island, Canada (ODP 146, 1992 and IODP 311, 2005). In the Atlantic Ocean off the US, ODP Leg 146 sampled hydrate deposits on the Blake Ridge and Carolina Rise in 1995. International cooperation helps scientists in the US and other countries

295

Gas-Phase Molecular Dynamics: High Resolution Spectroscopy and Collision Dynamics of Transient Species  

SciTech Connect

This research is carried out as part of the Gas-Phase Molecular Dynamics program in the Chemistry Department at Brookhaven National Laboratory. Chemical intermediates in the elementary gas-phase reactions involved in combustion chemistry are investigated by high resolution spectroscopic tools. Production, reaction, and energy transfer processes are investigated by transient, double resonance, polarization and saturation spectroscopies, with an emphasis on technique development and connection with theory, as well as specific molecular properties.

Hall, G.E.

2011-05-31T23:59:59.000Z

296

Gas-Phase Molecular Dynamics: High Resolution Spectroscopy and Collision Dynamics of Transient Species  

SciTech Connect

This research is carried out as part of the Gas-Phase Molecular Dynamics program in the Chemistry Department at Brookhaven National Laboratory. Chemical intermediates in the elementary gas-phase reactions involved in combustion chemistry are investigated by high resolution spectroscopic tools. Production, reaction, and energy transfer processes are investigated by transient, double resonance, polarization and saturation spectroscopies, with an emphasis on technique development and connection with theory, as well as specific molecular properties.

Hall G. E.; Goncharov, V.

2012-05-29T23:59:59.000Z

297

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Gulf of Mexico Gas Hydrates Joint Industry Project (JIP) Characterizing Natural Gas Hydrates in the Deep Water Gulf of Mexico - Applications for Safe Exploration and Production Last Reviewed 12/18/2013 Gulf of Mexico Gas Hydrates Joint Industry Project (JIP) Characterizing Natural Gas Hydrates in the Deep Water Gulf of Mexico - Applications for Safe Exploration and Production Last Reviewed 12/18/2013 DE-FC26-01NT41330 Goal: The goal of this project is to develop technology and collect data to assist in the characterization of naturally occurring gas hydrates in the deep water Gulf of Mexico (GoM). The intent of the project is to better understand the impact of hydrates on safety and seafloor stability as well as provide data for use by scientists in their study of climate change and assessment of the feasibility of marine hydrate as a potential future energy resource. Photo of the Helix Q4000 The Semi-Submersible Helix Q4000 used on the 21 day JIP Leg II Drilling and Logging Expedition

298

Detection and Production of Methane Hydrate  

Science Conference Proceedings (OSTI)

This project seeks to understand regional differences in gas hydrate systems from the perspective of as an energy resource, geohazard, and long-term climate influence. Specifically, the effort will: (1) collect data and conceptual models that targets causes of gas hydrate variance, (2) construct numerical models that explain and predict regional-scale gas hydrate differences in 2-dimensions with minimal 'free parameters', (3) simulate hydrocarbon production from various gas hydrate systems to establish promising resource characteristics, (4) perturb different gas hydrate systems to assess potential impacts of hot fluids on seafloor stability and well stability, and (5) develop geophysical approaches that enable remote quantification of gas hydrate heterogeneities so that they can be characterized with minimal costly drilling. Our integrated program takes advantage of the fact that we have a close working team comprised of experts in distinct disciplines. The expected outcomes of this project are improved exploration and production technology for production of natural gas from methane hydrates and improved safety through understanding of seafloor and well bore stability in the presence of hydrates. The scope of this project was to more fully characterize, understand, and appreciate fundamental differences in the amount and distribution of gas hydrate and how this would affect the production potential of a hydrate accumulation in the marine environment. The effort combines existing information from locations in the ocean that are dominated by low permeability sediments with small amounts of high permeability sediments, one permafrost location where extensive hydrates exist in reservoir quality rocks and other locations deemed by mutual agreement of DOE and Rice to be appropriate. The initial ocean locations were Blake Ridge, Hydrate Ridge, Peru Margin and GOM. The permafrost location was Mallik. Although the ultimate goal of the project was to understand processes that control production potential of hydrates in marine settings, Mallik was included because of the extensive data collected in a producible hydrate accumulation. To date, such a location had not been studied in the oceanic environment. The project worked closely with ongoing projects (e.g. GOM JIP and offshore India) that are actively investigating potentially economic hydrate accumulations in marine settings. The overall approach was fivefold: (1) collect key data concerning hydrocarbon fluxes which is currently missing at all locations to be included in the study, (2) use this and existing data to build numerical models that can explain gas hydrate variance at all four locations, (3) simulate how natural gas could be produced from each location with different production strategies, (4) collect new sediment property data at these locations that are required for constraining fluxes, production simulations and assessing sediment stability, and (5) develop a method for remotely quantifying heterogeneities in gas hydrate and free gas distributions. While we generally restricted our efforts to the locations where key parameters can be measured or constrained, our ultimate aim was to make our efforts universally applicable to any hydrate accumulation.

George Hirasaki; Walter Chapman; Gerald Dickens; Colin Zelt; Brandon Dugan; Kishore Mohanty; Priyank Jaiswal

2011-12-31T23:59:59.000Z

299

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

If you need help finding information on a particular project, please contact the content manager. If you need help finding information on a particular project, please contact the content manager. Search Hydrates Projects Active Projects | Completed Projects Click on project number for a more detailed description of the project. Project Number Project Name Primary Performer DE-FC26-01NT41332 Alaska North Slope Gas Hydrate Reservoir Characterization BP Exploration Alaska, Inc. DE-FC26-01NT41330 Characterizing Natural Gas Hydrates in the Deep Water Gulf of Mexico: Applications for Safe Exploration Chevron Energy Technology Company DE-FE0009897 Hydrate-Bearing Clayey Sediments: Morphology, Physical Properties, Production and Engineering/Geological Implications Georgia Tech Research Corporation DE-FE0009904 Structural and Stratigraphic Controls on Methane Hydrate Occurrence and Distribution: Gulf of Mexico, Walker Ridge 313 and Green Canyon 955 Oklahoma State University

300

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Gathering, Processing and Evaluating Seismic and Physical Data on Gas Hydrates in the Gulf of Mexico Last Reviewed 02/05/2010 Gathering, Processing and Evaluating Seismic and Physical Data on Gas Hydrates in the Gulf of Mexico Last Reviewed 02/05/2010 DE-AT26-97FT34343 photo of piston core apparatus prior to being dropped Piston core apparatus with 6-ton weight prior to being dropped Photo courtesy USGS Goal The goal of the project is to characterize hydrates in the Gulf of Mexico (GOM) and further develop field techniques for characterizing hydrates. Performer US Geological Survey, Woods Hole Field Center Location Woods Hole Massachusetts Background Oceanic methane hydrates are a major emerging research topic spanning energy resource issues, global climate change, seafloor stability, ocean acoustics, impact on deep marine biota, and a number of special topics. Recent developments in the last five years have both broadened and deepened

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

NETL: Methane Hydrates - DOE/NETL Projects - Downhole Oxyfuel...  

NLE Websites -- All DOE Office Websites (Extended Search)

for producing natural gas from hydrate-bearing sediments are depressurization and thermal stimulation. Test well results indicate that depressurization alone may not be sufficient...

302

Department of Energy Advance Methane Hydrates Science and Technology  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Advance Methane Hydrates Science and Technology Projects Dollars awarded will go to research the advance understanding of the nature and occurrence of Deepwater and Arctic gas...

303

NETL: Methane Hydrates - DOE/NETL Projects - Borehole Tool for...  

NLE Websites -- All DOE Office Websites (Extended Search)

liquid and gas permeabilities and their variation with saturation define flow rates; and heat capacity and conduction limit dissociation. The study of methane hydrate-bearing...

304

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Natural Gas Hydrates in the Deep Water Gulf of Mexico - Applications for Safe Exploration and Production Last Reviewed 6142013 DE-FC26-01NT41330 Goal: The goal of...

305

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Gas Hydrate Production Trial Using CO2 CH4 Exchange Last Reviewed 822013 DE-NT0006553 Goal The goal of this project is to define, plan, conduct and evaluate the results of a...

306

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Production of Methane Hydrate Last Reviewed 5152012 DE-FC26-06NT42960 Goal The goal of this project is to improve the understanding of regional and local differences in gas...

307

NETL: News Release - Methane Hydrate Production Technologies...  

NLE Websites -- All DOE Office Websites (Extended Search)

of CO2 molecules for methane molecules in the solid-water hydrate lattice, the release of methane gas, and the permanent storage of CO2 in the formation. This field experiment will...

308

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Mallik 5L-39 location Drillsite at Mallik 5L-38 location courtesy Geological Survey of Canada Goal Obtain information that can be utilized to develop gas hydrate computer...

309

Gas Production From a Cold, Stratigraphically Bounded Hydrate Deposit at the Mount Elbert Site, North Slope, Alaska  

E-Print Network (OSTI)

and cumulative mass of produced water (M W ); the remainingthe cumulative mass of produced water M w increases with aproduced at the well, or remaining in the deposit as free gas (V R , V P and V F , respectively); water

Moridis, G.J.

2010-01-01T23:59:59.000Z

310

Dynamic Absorption Model for Off-Gas Separation  

Science Conference Proceedings (OSTI)

Modeling and simulations will aid in the future design of U.S. advanced reprocessing plants for the recovery and recycle of actinides in used nuclear fuel. The specific fuel cycle separation process discussed in this report is the off-gas treatment system. The off-gas separation consists of a series of scrubbers and adsorption beds to capture constituents of interest. Dynamic models are being developed to simulate each unit operation involved so each unit operation can be used as a stand-alone model and in series with multiple others. Currently, a rate based, dynamic absorption model is being developed in gPROMS software. Inputs include liquid and gas stream constituents, column properties, liquid and gas phase reactions, number of stages, and inlet conditions. It simulates multiple component absorption with countercurrent flow and accounts for absorption by mass transfer and chemical reaction. The assumption of each stage being a discrete well-mixed entity was made. Therefore, the model is solved stagewise. The simulation outputs component concentrations in both phases as a function of time from which the rate of absorption is determined. Temperature of both phases is output as a function of time also. The model will be used able to be used as a standalone model in addition to in series with other off-gas separation unit operations. The current model is being generated based on NOx absorption; however, a future goal is to develop a CO2 specific model. The model will have the capability to be modified for additional absorption systems. The off-gas models, both adsorption and absorption, will be made available via the server or web for evaluation by customers.

Veronica J. Rutledge

2011-07-01T23:59:59.000Z

311

Universal dynamics of a degenerate unitary Bose gas  

E-Print Network (OSTI)

Understanding the rich behavior that emerges from systems of interacting quantum particles, such as electrons in materials, nucleons in nuclei or neutron stars, the quark-gluon plasma, and superfluid liquid helium, requires investigation of systems that are clean, accessible, and have tunable parameters. Ultracold quantum gases offer tremendous promise for this application largely due to an unprecedented control over interactions. Specifically, $a$, the two-body scattering length that characterizes the interaction strength, can be tuned to any value. This offers prospects for experimental access to regimes where the behavior is not well understood because interactions are strong, atom-atom correlations are important, mean-field theory is inadequate, and equilibrium may not be reached or perhaps does not even exist. Of particular interest is the unitary gas, where $a$ is infinite, and where many aspects of the system are universal in that they depend only on the particle density and quantum statistics. While the unitary Fermi gas has been the subject of intense experimental and theoretical investigation, the degenerate unitary Bose gas has generally been deemed experimentally inaccessible because of three-body loss rates that increase dramatically with increasing $a$. Here, we investigate dynamics of a unitary Bose gas for timescales that are short compared to the loss. We find that the momentum distribution of the unitary Bose gas evolves on timescales fast compared to losses, and that both the timescale for this evolution and the limiting shape of the momentum distribution are consistent with universal scaling with density. This work demonstrates that a unitary Bose gas can be created and probed dynamically, and thus opens the door for further exploration of this novel strongly interacting quantum liquid.

Philip Makotyn; Catherine E. Klauss; David L. Goldberger; Eric. A. Cornell; Deborah S. Jin

2013-08-16T23:59:59.000Z

312

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

SciTech Connect

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project is in the second year of a three-year endeavor being sponsored by Maurer Technology, Noble, and Anadarko Petroleum, in partnership with the DOE. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition. We plan to identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. We also plan to design and implement a program to safely and economically drill, core and produce gas from arctic hydrates. The current work scope is to drill and core a well on Anadarko leases in FY 2003 and 2004. We are also using an on-site core analysis laboratory to determine some of the physical characteristics of the hydrates and surrounding rock. The well is being drilled from a new Anadarko Arctic Platform that will have minimal footprint and environmental impact. We hope to correlate geology, geophysics, logs, and drilling and production data to allow reservoir models to be calibrated. Ultimately, our goal is to form an objective technical and economic evaluation of reservoir potential in Alaska.

Thomas E. Williams; Keith Millheim; Buddy King

2004-03-01T23:59:59.000Z

313

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

SciTech Connect

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the US have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project is in the second year of a three-year endeavor being sponsored by maurer Technology, noble, and Anadarko Petroleum, in partnership with the DOE. The purpose of the project is to build on previous and ongoing R and D in the area of onshore hydrate deposition. They plan to identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. They also plan to design and implement a program to safely and economically drill, core and produce gas from arctic hydrates. The current work scope is to drill and core a well on Anadarko leases in FY 2003 and 2004. They are also using an on-site core analysis laboratory to determine some of the physical characteristics of the hydrates and surrounding rock. The well is being drilled from a new Anadarko Arctic Platform that will have minimal footprint and environmental impact. They hope to correlate geology, geophysics, logs, and drilling and production data to allow reservoir models to be calibrated. Ultimately, the goal is to form an objective technical and economic evaluation of reservoir potential in Alaska.

Thomas E. Williams; Keith Millheim; Buddy King

2003-12-01T23:59:59.000Z

314

Gas-Phase Molecular Dynamics: Theoretical Studies In Spectroscopy and Chemical Dynamics  

Science Conference Proceedings (OSTI)

The main goal of this program is the development and application of computational methods for studying chemical reaction dynamics and molecular spectroscopy in the gas phase. We are interested in developing rigorous quantum dynamics algorithms for small polyatomic systems and in implementing approximate approaches for complex ones. Particular focus is on the dynamics and kinetics of chemical reactions and on the rovibrational spectra of species involved in combustion processes. This research also explores the potential energy surfaces of these systems of interest using state-of-the-art quantum chemistry methods, and extends them to understand some important properties of materials in condensed phases and interstellar medium as well as in combustion environments.

Yu H. G.; Muckerman, J.T.

2012-05-29T23:59:59.000Z

315

Gas-Phase Molecular Dynamics: Theoretical Studies in Spectroscopy and Chemical Dynamics  

SciTech Connect

The goal of this program is the development and application of computational methods for studying chemical reaction dynamics and molecular spectroscopy in the gas phase. We are interested in developing rigorous quantum dynamics algorithms for small polyatomic systems and in implementing approximate approaches for complex ones. Particular focus is on the dynamics and kinetics of chemical reactions and on the rovibrational spectra of species involved in combustion processes. This research also explores the potential energy surfaces of these systems of interest using state-of-the-art quantum chemistry methods.

Yu, H.G.; Muckerman, J.T.

2010-06-01T23:59:59.000Z

316

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Gas Production From Oceanic Class 2 Hydrate Accumulations Gas Production From Oceanic Class 2 Hydrate Accumulations Authors: George J. Moridis, Matt T. Reagan, Lawrence Berkeley...

317

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Gas-hydrate concentration and uncertainty estimation from electrical resistivity logs: examples from Green Canyon, Gulf of Mexico Gas-hydrate concentration and uncertainty...

318

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Application of fiber optic temperature and strain sensing technology to gas hydrates Application of fiber optic temperature and strain sensing technology to gas hydrates Authors:...

319

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Gas Production From Class 2 Hydrate Accumulations in the Permafrost Gas Production From Class 2 Hydrate Accumulations in the Permafrost Authors: Moridis, George (speaker) and...

320

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

studies have provided strong indications that it is possible to produce large volumes of gas from natural hydrate deposits at high rates for long times from gas hydrate...

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Strategies for Gas Production From Oceanic Class 3 Hydrate Accumulations Strategies for Gas Production From Oceanic Class 3 Hydrate Accumulations Authors: George J. Moridis, Matt...

322

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Geologic Controls on the Occurrence of Gas Hydrates in the Indian Continental Margin Geologic Controls on the Occurrence of Gas Hydrates in the Indian Continental Margin: Results...

323

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Reactive transport modeling of oceanic gas hydrate instability and dissociation in response to climate change Reactive transport modeling of oceanic gas hydrate instability and...

324

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Scale Study of Hydrate Formation in Sediments from Methane Gas Grain Scale Study of Hydrate Formation in Sediments from Methane Gas: Role of Capillarity Authors: Javad Behseresht,...

325

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Similarity Solution for Gas Production From Dissociating Hydrates in Geologic Media Similarity Solution for Gas Production From Dissociating Hydrates in Geologic Media Authors:...

326

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Produced Water Treatment Using Gas Hydrate Formation at the Wellhead Produced Water Treatment Using Gas Hydrate Formation at the Wellhead Authors: John and Deidre Boysen Venue:...

327

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Mechanisms by Which Methane Gas and Methane Hydrate Coexist In Ocean Sediments Mechanisms by Which Methane Gas and Methane Hydrate Coexist In Ocean Sediments Authors: Maa...

328

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Identifying gas hydrate prospects offshore India Identifying gas hydrate prospects offshore India Authors: Collett, Timothy S. (speaker: Winters, Bill, U.S. Geological Survey)....

329

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Gas hydrates: A multidisciplinary research opportunity Gas hydrates: A multidisciplinary research opportunity Author: William F. Waite, U.S. Geological Survey (USGS) Venue:...

330

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Oceanic Gas Hydrate Instability and Dissociation in Response to Climate Change Oceanic Gas Hydrate Instability and Dissociation in Response to Climate Change Authors: Moridis,...

331

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Early Cretaceous and Early Paleogene. Such temperatures would impact the distribution of gas hydrate in marine sediment. Clearly, the vertical extent of the Gas Hydrate Stability...

332

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

The Use of Horizontal Wells in Gas Production from Hydrate Accumulations The Use of Horizontal Wells in Gas Production from Hydrate Accumulations Authors: George J. Moridis...

333

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

The Feasibility of Monitoring Gas Hydrate Production with Geophysical Methods Feasibility of Monitoring Gas Hydrate Production with Geophysical Methods Authors: M.B. Kowalsky...

334

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Sensitivity Analysis of Gas Production from Class 2 and Class 3 Hydrate Deposits Sensitivity Analysis of Gas Production from Class 2 and Class 3 Hydrate Deposits (OTC 19554)...

335

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

from natural gas hydrates, plugging pipelines, stability and safety of drilling of platforms, as well as how dissociation of gas hydrates and sequestration of CO2 within the...

336

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

to develop a two-dimensional, basin-scale model for the deep sediment biosphere with methane dynamics to provide a better picture of the distribution of hydrates on the sea floor...

337

Gas Phase Moleculer Dynamics (GPMD) Group | Chemistry Department |  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Program Research Program The research within the Gas Phase Molecular Dynamics program spans spectroscopy, kinetics and dynamics, with input from both experiment and theory. The broad topics of recent and current focus are Development of new spectroscopic methods to probe transient molecules of importance to combustion Application of these methods to collisional dynamics and kinetics Theoretical predictions of vibrational spectra of small molecules and radicals Development and use of computational methods in reaction kinetics and dynamics, optimizing accuracy and efficiency to the size of the problem The group has long experience in the application of transient frequency modulation (FM) spectroscopy methods for probing radicals, and using this method for polarized photofragment Doppler spectroscopy and kinetics. More recently, FM applications in double resonance have been developed for spectral simplification and assignments, and for saturation recovery and transfer kinetics to study collisional energy and polarization transfer. Sub-Doppler saturation methods with FM probing have recently been applied to a variety of nuclear hyperfine structure problems in spectroscopy and dynamics. Frequency comb-stabilized diode lasers in the near infrared have been used for highly precise frequency-domain measurements of pressure broadening and line shape studies of collision effects.

338

NETL: Methane Hydrates - ANS Research Project  

NLE Websites -- All DOE Office Websites (Extended Search)

Photo Gallery Photo Gallery Photo of hydrate saturated, fine grained sand core from the Mt. Elbert #1 well Hydrate saturated, fine grained sand core from the Mt. Elbert #1 well .- click on image to enlarge Photo of close up of fine grained sand core sample. This sample was taken for porewater geochemical analyses and was hydrate saturated at the time of recovery. Close up of fine grained sand core sample. This sample was taken for porewater geochemical analyses and was hydrate saturated at the time of recovery.- click on image to enlarge Photo of close up of fine grained sand core sample being placed in water. Links to video of hydrate dissociating One visual test used to confirm that a core contains hydrate is to place a small sample from the core in a canister of water. The gas dissociated from the hydrate-bearing sediment is released into the water and bubbles to the surface. In the video sequence shown here, dissociated hydrate gas from a sample of Mt. Elbert #1 core can be seen and heard as it is released into the water. - click on image to view video [MPEG]

339

Gas conditioning and processing. Volume II. Absorption and fractionation; pumping, compression and expansion; refrigeration; hydrate inhibition, dehydration and process control  

SciTech Connect

Volume II of a two volume publication is presented in which aspects of conditioning and/or processing of natural gas for sale are examined. Chapters are included on absorption and fractionation, compression and expansion of fluids, refrigeration systems, liquefaction processes, water-hydrocarbon system behavior, dehydration and sweetening, adsorption processing, sulfur recovery, process control, and cost estimation. (JRD)

Campbell, J.M.

1976-01-01T23:59:59.000Z

340

Oil & Natural Gas Technology  

NLE Websites -- All DOE Office Websites (Extended Search)

... 6 Task 5: Carbon Inputs and Outputs to Gas Hydrate Systems ... 7 Task 6: Numerical Models for...

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Characterizing Arctic Hydrates (Canadian Test Well and Alaskan "Wells of Opportunity") Characterizing Arctic Hydrates (Canadian Test Well and Alaskan "Wells of Opportunity") photo of drilling rig at Mallik 2L-38 location Rig at Mallik 2L-38 location courtesy Geological Survey of Canada DE-AT26-97FT34342 Goal The purpose of this project is to assess the recoverability and potential production characteristics of the onshore natural gas hydrate and associated free-gas accumulations in the Arctic of North America Performer United States Geological Survey, Denver, Colorado 80225 - partner in GSC-managed consortium and provide expertise in data gathering and analysis Background The U.S. Geological Survey has been participating in natural gas hydrate reservoir research with DOE NETL through an interagency agreement which began in the early 1980Â’s. The work has been an ongoing effort as part of

342

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Collection and Microbiological Analysis of Gas Hydrate Cores Collection and Microbiological Analysis of Gas Hydrate Cores FWP-4340-60 and FWP-42C1-01 Goal Determine the presence and activity of methanogens in methane hydrate-bearing sediments. Background The project was set up to determine a fundamental modeling parameter - the amount of methane generated in deep sediments by methanogenic microorganisms. This would allow methane distribution models of gas hydrate reservoirs to accurately reflect an unknown volume and the distribution of biogenic methane within in a reservoir. The personnel at INEL have experience in similar biologic research and are considered to be experts by their global peers. Performer Idaho National Engineering and Environmental Laboratory (INEEL) - sample collection and analysis Location

343

Methane Hydrates and Climate Change | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hydrates and Climate Change Hydrates and Climate Change Methane Hydrates and Climate Change Methane hydrates store huge volumes of methane formed by the bacterial decay of organic matter or leaked from underlying oil and natural gas deposits. The active formation of methane hydrates in the shallow crust prevents methane, a greenhouse gas, from entering the atmosphere. On the other hand, warming of arctic sediments or ocean waters has the potential to cause methane hydrate to dissociate, releasing methane into the deepwater sediments, the ocean or atmosphere. DOE is conducting research to understand the mechanisms and volumes involved in these little-studied processes. DOE environmental and climate change research projects related to Arctic methane hydrate deposits include: Characterization of Methane Degradation and Methane-Degrading

344

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Laboratory Studies in Support of Characterization of Recoverable Resources from Methane Hydrate Deposits Last Reviewed 5/10/2012 Laboratory Studies in Support of Characterization of Recoverable Resources from Methane Hydrate Deposits Last Reviewed 5/10/2012 ESD05-048 Goal The project is bringing new laboratory measurements and evaluation techniques to bear on the difficult problems of characterization and gas recovery from methane hydrate deposits. Performer Lawrence Berkeley National Laboratory, Berkeley, CA 94720 Background LBNL is performing laboratory tests to provide data to support the characterization and development of methane hydrate deposits. Major areas of research underway include hydrologic measurements, combined geomechanical/geophysical measurements, and synthetic hydrate formation studies. Hydrologic Measurements Relatively little research has been done to experimentally determine

345

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Thermal Properties of Hydrate – Tool Development Last Reviewed 3/18/2013 Thermal Properties of Hydrate – Tool Development Last Reviewed 3/18/2013 Project Goal The goal of this project is increased understanding of gas hydrate thermal properties through measurements on natural hydrate-bearing sediment cores and hydrate-bearing cores formed within laboratory pressure vessels. Project Performers Eilis Rosenbaum, NETL, Office of Research and Development Ronald Lynn, NETL, RDS/Parsons Dr. David Shaw, Geneva College Project Location National Energy Technology Laboratory, Pittsburgh, PA Background NETL utilizes a modified transient plane source (TPS) shown in Figure 1 using a technique originally developed by Gustafsson [1, 2] in a single-sided configuration (Figure 2). The TPS technique is capable of simultaneously determining both thermal conductivity and thermal

346

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Seismic-Scale Rock Physics of Methane Hydrate Seismic-Scale Rock Physics of Methane Hydrate DE-FC26-05NT42663 Goal The goal of this project was to establish rock physics models for use in generating synthetic seismic signatures of methane hydrate reservoirs. Ultimately, the intent was to improve seismic detection and quantification of offshore and onshore methane hydrate accumulations. Performer Stanford University, Stanford, CA 94305 Background Gas hydrate reservoir characterization is, in principle, no different from traditional hydrocarbon reservoir characterization. The seismic response of the subsurface is determined by the spatial distribution of the elastic properties (properties of the subsurface that deform as seismic waves pass through it) and attenuation. By mapping changes in the elastic properties, scientists can identify geologic features, including hydrocarbon reservoirs.

347

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

Science Conference Proceedings (OSTI)

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project was a cost-shared partnership between Maurer Technology, Noble Corporation, Anadarko Petroleum, and the U.S. Department of Energy's Methane Hydrate R&D program. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition to identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. The work scope included drilling and coring a well (Hot Ice No. 1) on Anadarko leases beginning in FY 2003 and completed in 2004. During the first drilling season, operations were conducted at the site between January 28, 2003 to April 30, 2003. The well was spudded and drilled to a depth of 1403 ft. Due to the onset of warmer weather, work was then suspended for the season. Operations at the site were continued after the tundra was re-opened the following season. Between January 12, 2004 and March 19, 2004, the well was drilled and cored to a final depth of 2300 ft. An on-site core analysis laboratory was built and implemented for determining physical characteristics of the hydrates and surrounding rock. The well was drilled from a new Anadarko Arctic Platform that has a minimal footprint and environmental impact. Final efforts of the project are to correlate geology, geophysics, logs, and drilling and production data and provide this information to scientists developing reservoir models and to research teams for developing future gas-hydrate projects. No gas hydrates were encountered in this well; however, a wealth of information was generated and has been documented by the project team. This Topical Report documents drilling and coring operations and other daily activities.

Ali Kadaster; Bill Liddell; Tommy Thompson; Thomas Williams; Michael Niedermayr

2005-02-01T23:59:59.000Z

348

MethaneHydrateRD_FC.indd  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

gas is an important energy gas is an important energy resource for the United States, providing nearly one-quarter of total energy use. The Department of Energy's Office of Fossil Energy (FE) has played a major role in developing technologies to help tap new, unconventional sources of natural gas. FOSSIL ENERGY RESEARCH BENEFITS Methane Hydrate R&D "The (DOE) Program has supported and managed a high-quality research portf olio that has enabled signifi cant progress toward the (DOE) Program's long-term goals." The Nati onal Academies 2010 One of these is methane hydrate - molecules of natural gas trapped in ice crystals. Containing vast amounts of natural gas, methane hydrate occurs in a variety of forms in sediments within and below thick permafrost in Arctic regions, and in the

349

Ice method for production of hydrogen clathrate hydrates  

DOE Patents (OSTI)

The present invention includes a method for hydrogen clathrate hydrate synthesis. First, ice and hydrogen gas are supplied to a containment volume at a first temperature and a first pressure. Next, the containment volume is pressurized with hydrogen gas to a second higher pressure, where hydrogen clathrate hydrates are formed in the process.

Lokshin, Konstantin (Santa Fe, NM); Zhao, Yusheng (Los Alamos, NM)

2008-05-13T23:59:59.000Z

350

3 , LNG (Liquefied Natural Gas) -165oC  

E-Print Network (OSTI)

C / . Natural Gas Hydrate (NGH) Liquefied Natural Gas (LNG) Modes of Transport and Storage , , . . . , . , LNG (Liquefied Natural Gas) -165oC , . (Piped Natural Gas, PNG) , , . PNG, LNG ( 2-3 ), . (Natural Gas Hydrate, NGH) / . -20o

Hong, Deog Ki

351

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Oceanic gas hydrate dissociation in response to climate change and the fate of hydrate-derived methane Oceanic gas hydrate dissociation in response to climate change and the fate...

352

Methane Hydrate Production Technologies to be Tested on Alaska's North  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Methane Hydrate Production Technologies to be Tested on Alaska's Methane Hydrate Production Technologies to be Tested on Alaska's North Slope Methane Hydrate Production Technologies to be Tested on Alaska's North Slope October 24, 2011 - 1:00pm Addthis Washington, DC - The U.S. Department of Energy, the Japan Oil, Gas and Metals National Corporation, and ConocoPhillips will work together to test innovative technologies for producing methane gas from hydrate deposits on the Alaska North Slope. The collaborative testing will take place under the auspices of a Statement of Intent for Cooperation in Methane Hydrates signed in 2008 and extended in 2011 by DOE and Japan's Ministry of Economy, Trade, and Industry. The production tests are the next step in both U.S. and Japanese national efforts to evaluate the response of gas hydrate reservoirs to alternative

353

NETL: Methane Hydrates - Hydrate Model Code Comparison  

NLE Websites -- All DOE Office Websites (Extended Search)

Reservoir Simulator Code Comparison Study An International Effort to Compare Methane Hydrate Reservoir Simulators Code Comparison Logo The National Energy Technology Laboratory...

354

NETL: Methane Hydrates - Methane Hydrate Library  

NLE Websites -- All DOE Office Websites (Extended Search)

from the ANS drilling and coring operation - February, 2007 DOEJoint Industry Project - Gulf of Mexico Hydrate Research Cruise Photos from the Gulf of Mexico research cruise -...

355

Study of gas flow dynamics in porous and granular media with laser-polarized ą˛?Xe NMR  

E-Print Network (OSTI)

This thesis presents Nuclear Magnetic Resonance (NMR) studies of gas flow dynamics in porous and granular media by using laser-polarized ą˛?Xe . Two different physical processes, the gas transport in porous rock cores and ...

Wang, Ruopeng, 1972-

2005-01-01T23:59:59.000Z

356

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

Science Conference Proceedings (OSTI)

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project is a cost-shared partnership between Maurer Technology, Anadarko Petroleum, Noble Corporation, and the U.S. Department of Energy's Methane Hydrate R&D program. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition to help identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. As part of the project work scope, team members drilled and cored a well (the Hot Ice No. 1) on Anadarko leases beginning in January 2003 and completed in March 2004. Due to scheduling constraints imposed by the Arctic drilling season, operations at the site were suspended between April 21, 2003 and January 30, 2004. An on-site core analysis laboratory was constructed and used for determining physical characteristics of frozen core immediately after it was retrieved from the well. The well was drilled from a new and innovative Anadarko Arctic Platform that has a greatly reduced footprint and environmental impact. Final efforts of the project were to correlate geology, geophysics, logs, and drilling and production data and provide this information to scientists for future hydrate operations. No gas hydrates were encountered in this well; however, a wealth of information was generated and is contained in the project reports. Documenting the results of this effort are key to extracting lessons learned and maximizing the industry's benefits for future hydrate exploitation. In addition to the Final Report, several companion Topical Reports are being published.

Thomas E. Williams; Keith Millheim; Bill Liddell

2004-11-01T23:59:59.000Z

357

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

Science Conference Proceedings (OSTI)

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project was a cost-shared partnership between Maurer Technology, Noble Corporation, Anadarko Petroleum, and the U.S. Department of Energy's Methane Hydrate R&D program. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition to identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. The work scope included drilling and coring a well (Hot Ice No. 1) on Anadarko leases beginning in FY 2003 and completed in 2004. During the first drilling season, operations were conducted at the site between January 28, 2003 to April 30, 2003. The well was spudded and drilled to a depth of 1403 ft. Due to the onset of warmer weather, work was then suspended for the season. Operations at the site were continued after the tundra was re-opened the following season. Between January 12, 2004 and March 19, 2004, the well was drilled and cored to a final depth of 2300 ft. An on-site core analysis laboratory was built and utilized for determining the physical characteristics of the hydrates and surrounding rock. The well was drilled from a new Anadarko Arctic Platform that has a minimal footprint and environmental impact. The final efforts of the project are to correlate geology, geophysics, logs, and drilling and production data and provide this information to scientists planning hydrate exploration and development projects. No gas hydrates were encountered in this well; however, a wealth of information was generated and is contained in this and other project reports. This Topical Report contains details describing logging operations.

Steve Runyon; Mike Globe; Kent Newsham; Robert Kleinberg; Doug Griffin

2005-02-01T23:59:59.000Z

358

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

SciTech Connect

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. This gas-hydrate project is a cost-shared partnership between Maurer Technology, Anadarko Petroleum, Noble Corporation, and the U.S. Department of Energy's Methane Hydrate R&D program. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition to help identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. As part of the project work scope, team members drilled and cored a well (the Hot Ice No. 1) on Anadarko leases beginning in January 2003 and completed in March 2004. Due to scheduling constraints imposed by the Arctic drilling season, operations at the site were suspended between April 21, 2003 and January 30, 2004. An on-site core analysis laboratory was constructed and used for determining physical characteristics of frozen core immediately after it was retrieved from the well. The well was drilled from a new and innovative Anadarko Arctic Platform that has a greatly reduced footprint and environmental impact. Final efforts of the project were to correlate geology, geophysics, logs, and drilling and production data and provide this information to scientists for future hydrate operations. No gas hydrates were encountered in this well; however, a wealth of information was generated and is contained in the project reports. Documenting the results of this effort are key to extracting lessons learned and maximizing the industry's benefits for future hydrate exploitation.

Thomas E. Williams; Keith Millheim; Bill Liddell

2005-02-01T23:59:59.000Z

359

NETL: Methane Hydrates - DOE/JIP GOM Hydrate Research Cruise  

NLE Websites -- All DOE Office Websites (Extended Search)

Wireline Logging Wireline Logging From: Timothy Collett, USGS Conventional Wireline Logging Operations in the Gulf of Mexico Gas Hydrate JIP Drilling Program Conventional wireline (CWL) logging operations in the Gulf of Mexico Gas Hydrate JIP Drilling Program (GOM-JIP) was scheduled to include the deployment of a signal logging string (Figure 1) and a vertical seismic profiling (VSP) tool (Figure 2) in several of the Atwater Valley and Keathley Canyon drill sites. The only wireline logging tool scheduled to be deployed was the FMS-sonic tool string, which consisted of the Formation MicroScanner (FMS), a general purpose inclinometer tool (GPIT), and scintillation gamma ray tool (SGT), and the dipole shear sonic imager tool (DSI). The vertical seismic imager tool (VSI) will also be deployed during the GOM-JIP drilling program. The wireline logging tools were provided by Schlumberger wireline services.

360

Geomechanical Performance of Hydrate-Bearing Sediment in Offshore Environments  

Science Conference Proceedings (OSTI)

The objective of this multi-year, multi-institutional research project was to develop the knowledge base and quantitative predictive capability for the description of geomechanical performance of hydrate-bearing sediments (hereafter referred to as HBS) in oceanic environments. The focus was on the determination of the envelope of hydrate stability under conditions typical of those related to the construction and operation of offshore platforms. We have developed a robust numerical simulator of hydrate behavior in geologic media by coupling a reservoir model with a commercial geomechanical code. We also investigated the geomechanical behavior of oceanic HBS using pore-scale models (conceptual and mathematical) of fluid flow, stress analysis, and damage propagation. The objective of the UC Berkeley work was to develop a grain-scale model of hydrate-bearing sediments. Hydrate dissociation alters the strength of HBS. In particular, transformation of hydrate clusters into gas and liquid water weakens the skeleton and, simultaneously, reduces the effective stress by increasing the pore pressure. The large-scale objective of the study is evaluation of geomechanical stability of offshore oil and gas production infrastructure. At Lawrence Berkeley National Laboratory (LBNL), we have developed the numerical model TOUGH + Hydrate + FLAC3D to evaluate how the formation and disassociation of hydrates in seafloor sediments affects seafloor stability. Several technical papers were published using results from this model. LBNL also developed laboratory equipment and methods to produce realistic laboratory samples of sediments containing gas hydrates so that mechanical properties could be measured in the laboratory. These properties are required to run TOUGH + Hydrate + FLAC3D to evaluate seafloor stability issues. At Texas A&M University we performed a detailed literature review to determine what gas hydrate formation properties had been measured and reported in the literature. We then used TOUGH + Hydrate to simulate the observed gas production and reservoir pressure field data at Messoyakha. We simulated various scenarios that help to explain the field behavior. We have evaluated the effect of reservoir parameters on gas recovery from hydrates. Our work should be beneficial to others who are investigating how to produce gas from a hydrate capped gas reservoir. The results also can be used to better evaluate the process of producing gas from offshore hydrates. The Schlumberger PETREL model is used in industry to the description of geologic horizons and the special distribution of properties. An interface between FLAC3D and Petrel was built by Schlumberger to allow for efficient data entry into TOUGH + Hydrate + FLAC3D.

Stephen Holditch; Tad Patzek; Jonny Rutqvist; George Moridis; Richard Plumb

2008-03-31T23:59:59.000Z

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Arctic Methane, Hydrates, and Global Climate  

NLE Websites -- All DOE Office Websites (Extended Search)

Arctic Methane, Hydrates, and Global Climate Arctic Methane, Hydrates, and Global Climate Speaker(s): Matthew T. Reagan Date: March 17, 2010 - 12:00pm Location: 90-3122 Paleooceanographic evidence has been used to postulate that methane may have had a significant role in regulating past climate. However, the behavior of contemporary permafrost deposits and oceanic methane hydrate deposits subjected to rapid temperature changes, like those now occurring in the arctic and those predicted under future climate change scenarios, has only recently been investigated. A recent expedition to the west coast of Spitsbergen discovered substantial methane gas plumes exiting the seafloor at depths that correspond to the upper limit of the receding gas hydrate stability zone. It has been suggested that these plumes may be the

362

Methane Hydrate Field Studies | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Field Studies Field Studies Methane Hydrate Field Studies Arctic/Alaska North Slope Field Studies Since 2001, DOE has conducted field trials of exploration and production technology in the Alaska North Slope. Although Alaska methane hydrate resources are smaller than marine deposits and currently lack outlets to commercial markets, Alaska provides an excellent laboratory to study E&P technology. The research also has implications for various Alaska resources, including potential gas hydrate resources for local communities, conventional "stranded" gas, as well as Alaska's large unconventional oil resources. The hydrate deposits have been delineated in the process of developing underlying oil fields, and drilling costs are much lower than offshore. DOE-BP Project

363

Energy Department Expands Research into Methane Hydrates, a Vast...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

to safely and sustainably unlock the natural gas held within." Methane hydrates are ice-like structures with natural gas locked inside, which can be found both onshore and...

364

Method for controlling clathrate hydrates in fluid systems  

DOE Patents (OSTI)

Discussed is a process for preventing clathrate hydrate masses from impeding the flow of fluid in a fluid system. An additive is contacted with clathrate hydrate masses in the system to prevent those clathrate hydrate masses from impeding fluid flow. The process is particularly useful in the natural gas and petroleum production, transportation and processing industry where gas hydrate formation can cause serious problems. Additives preferably contain one or more five member and/or six member cyclic chemical groupings. Additives include poly(N-vinyl-2-pyrrolidone) and hydroxyethylcellulose, either in combination or alone.

Sloan, Jr., Earle D. (Golden, CO)

1995-01-01T23:59:59.000Z

365

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Gulf of Mexico Gas Hydrates Sea-floor Observatory Project Last Reviewed 12/18/2013 Gulf of Mexico Gas Hydrates Sea-floor Observatory Project Last Reviewed 12/18/2013 DE-FE26-06NT42877, DE-FC26-02NT41628, and DE-FC26-00NT40920 Goal The goal of this project is to conduct activities leading to the development, implementation, and operation of a remote, multi-sensor seafloor observatory focused on behavior of the marine hydrocarbon system within the gas hydrate stability zone of the deepwater Gulf of Mexico and analysis of data resultant from that observatory over time. Attaining this goal will lead to an enhanced understanding of the role the hydrocarbon system plays in the environment surrounding the site. Investigations include physical, chemical, and microbiological studies. Models developed from these studies are designed to provide a better understanding of gas

366

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Phase 1 - Characterization and Qualification of the Methane Hydrate Resource Potential Associated with the Barrow Gas Fields Phase 1 - Characterization and Qualification of the Methane Hydrate Resource Potential Associated with the Barrow Gas Fields DE-FC26-06NT42962 Goal The goal of this project is to characterize and quantify the postulated gas hydrate resource associated with the Barrow Gas Fields – three producing fields located in a permafrost region near Barrow, the North Slope's biggest population center and economic hub. Map of the North Slope Borough showing the location of its eight major communities, including Barrow, the site of this research project. Map of the North Slope Borough showing the location of its eight major communities, including Barrow, the site of this research project. Performers North Slope Borough, Barrow, Alaska (North Slope Borough) 99723

367

Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydration Hydration Water on Rutile Studied by Backscattering Neutron Spectroscopy and Molecular Dynamics Simulation E. Mamontov,* ,† D. J. Wesolowski, ‡ L. Vlcek, § P. T. Cummings, §,| J. Rosenqvist, ‡ W. Wang, ⊥ and D. R. Cole ‡ Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6473, Chemical Sciences DiVision, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6110, Department of Chemical Engineering, Vanderbilt UniVersity, NashVille, Tennessee 37235-1604, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6496, and EnVironmental Sciences DiVision, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6036 ReceiVed: December 20, 2007; ReVised Manuscript ReceiVed: June 4, 2008 The high energy resolution, coupled with the wide dynamic range, of the new backscattering

368

NETL: Methane Hydrates - Methane Hydrate Reference Shelf  

NLE Websites -- All DOE Office Websites (Extended Search)

Reference Shelf Reference Shelf The Methane Hydrate Reference Shelf was created to provide a repository for information collected from projects funded as part of the National Methane Hydrate R&D Program. As output from the projects is received, it will be reviewed and then placed onto the reference shelf to be available to other methane hydrate researchers. Projects: DOE/NETL Projects : These pages contain detailed information on methane hydrate projects funded through the National Energy Technology Laboratory. Publications: Newsletter | Bibliography | Software | Reports | Program Publications | Photo Gallery Newsletter: Fire in the Ice: A publication highlighting the National Methane Hydrate R&D Program Bibliography: "Project Reports Bibliography"[PDF]: The bibliography lists publications resulting from DOE/NETL-sponsored

369

Dynamic analysis and control of sieve tray gas absorption column using MATALB and SIMULINK  

Science Conference Proceedings (OSTI)

The present work highlights the powerful combination of SIMULINK/MATLAB software as an effective flowsheeting tool which was used to simulate steady state, open and closed loop dynamics of a sieve tray gas absorption column. A complete mathematical model, ... Keywords: Control, Dynamic modelling, Gas absorption, MATLAB, SIMULINK

Menwer Attarakih; Mazen Abu-Khader; Hans-JöRg Bart

2013-02-01T23:59:59.000Z

370

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

SciTech Connect

Natural-gas hydrates have been encountered beneath the permafrost and considered a drilling hazard by the oil and gas industry for years. Drilling engineers working in Russia, Canada and the USA have documented numerous problems, including drilling kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrates as a potential energy source agree that the resource potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained from physical samples taken from actual hydrate-bearing rocks. This gas-hydrate project is a cost-shared partnership between Maurer Technology, Anadarko Petroleum, Noble Corporation, and the U.S. Department of Energy's Methane Hydrate R&D program. The purpose of the project is to build on previous and ongoing R&D in the area of onshore hydrate deposition to identify, quantify and predict production potential for hydrates located on the North Slope of Alaska. The project team drilled and continuously cored the Hot Ice No. 1 well on Anadarko-leased acreage beginning in FY 2003 and completed in 2004. An on-site core analysis laboratory was built and used for determining physical characteristics of hydrates and surrounding rock. After the well was logged, a 3D vertical seismic profile (VSP) was recorded to calibrate the shallow geologic section with seismic data and to investigate techniques to better resolve lateral subsurface variations of potential hydrate-bearing strata. Paulsson Geophysical Services, Inc. deployed their 80 level 3C clamped borehole seismic receiver array in the wellbore to record samples every 25 ft. Seismic vibrators were successively positioned at 1185 different surface positions in a circular pattern around the wellbore. This technique generated a 3D image of the subsurface. Correlations were generated of these seismic data with cores, logging, and other well data. Unfortunately, the Hot Ice No. 1 well did not encounter hydrates in the reservoir sands, although brine-saturated sands containing minor amounts of methane were encountered within the hydrate stability zone (HSZ). Synthetic seismograms created from well log data were in agreement with reflectivity data measured by the 3D VSP survey. Modeled synthetic seismograms indicated a detectable seismic response would be expected in the presence of hydrate-bearing sands. Such a response was detected in the 3D VSP data at locations up-dip to the west of the Hot Ice No. 1 wellbore. Results of this project suggest that the presence of hydrate-bearing strata may not be related as simply to HSZ thickness as previously thought. Geological complications of reservoir facies distribution within fluvial-deltaic environments will require sophisticated detection technologies to assess the locations of recoverable volumes of methane contained in hydrates. High-resolution surface seismic data and more rigorous well log data analysis offer the best near-term potential. The hydrate resource potential is huge, but better tools are needed to accurately assess their location, distribution and economic recoverability.

Donn McGuire; Thomas Williams; Bjorn Paulsson; Alexander Goertz

2005-02-01T23:59:59.000Z

371

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Numerical Simulation Last Reviewed 3/8/2013 Numerical Simulation Last Reviewed 3/8/2013 Project Goal The goal of NETL's gas hydrate numerical simulation studies is to obtain pertinent, high-quality information on the behavior of gas hydrates in their natural environment under either production (methane gas extraction) or climate change scenarios. This research is closely linked with NETL's experimental and field studies programs to ensure the validity of input datasets and scenarios. Project Performers Brian Anderson, NETL/RUA Fellow (West Virginia University) Hema Siriwardane, NETL/RUA Fellow (West Virginia University) Eugene Myshakin, NETL/URS Project Locations National Energy Technology Laboratory, Pittsburgh PA, and Morgantown WV West Virginia University, Morgantown, WV Background Field-scale hydrate production tests rely heavily on reservoir-scale

372

Method for production of hydrocarbons from hydrates  

DOE Patents (OSTI)

A method of recovering natural gas entrapped in frozen subsurface gas hydrate formations in arctic regions. A hot supersaturated solution of CaCl.sub.2 or CaBr.sub.2, or a mixture thereof, is pumped under pressure down a wellbore and into a subsurface hydrate formation so as to hydrostatically fracture the formation. The CaCl.sub.2 /CaBr.sub.2 solution dissolves the solid hydrates and thereby releases the gas entrapped therein. Additionally, the solution contains a polymeric viscosifier, which operates to maintain in suspension finely divided crystalline CaCl.sub.2 /CaBr.sub.2 that precipitates from the supersaturated solution as it is cooled during injection into the formation.

McGuire, Patrick L. (Los Alamos, NM)

1984-01-01T23:59:59.000Z

373

Dynamic Transition Theory and its Application to Gas-Liquid Phase Transitions  

E-Print Network (OSTI)

Dynamic Transition Theory and its Application to Gas-Liquid Phase Transitions Tian Ma, Shouhong close links to the physics. In return the theory is applied to the physical problems. 2 #12;liquid gas #12;Objective: To study the types and the mechanisms of liquid-gas transitions. The phases correspond

Wang, Shouhong

374

A FLOW VISUALIZATION STUDY OF THE GAS DYNAMICS OF LIQUID METAL ATOMIZATION NOZZLES  

E-Print Network (OSTI)

A FLOW VISUALIZATION STUDY OF THE GAS DYNAMICS OF LIQUID METAL ATOMIZATION NOZZLES S.P. Mates and G-velocity gas to bear on the liquid metal, may point the way towards enhancing powder production capability Gas atomization of liquid metal via close-coupled nozzle technology is used to produce metal powders

Settles, Gary S.

375

NETL: Methane Hydrates - DOE/NETL Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Assessing the Efficacy of the Aerobic Methanotropic Biofilter in Methane Hydrate Environments Last Reviewed 1/8/2013 Assessing the Efficacy of the Aerobic Methanotropic Biofilter in Methane Hydrate Environments Last Reviewed 1/8/2013 DE-NT0005667 Goal The goal of this project is to assess the efficacy of aerobic methanotrophy in preventing the escape of methane from marine, hydrate-bearing reservoirs to the atmosphere and ultimately to better define the role of aerobic methanotrophy in the global carbon cycle. Graph overlayed on photo - Methane seeps with the resulting methane plume Methane seeps with the resulting methane plume, Geophysical Research Letters, November 2007 Performers University of California – Santa Barbara, Santa Barbara (UCSB), CA 93106 Background The global methane reservoir in the form of gas hydrate is estimated at 500–10,000 Gt (KVENVOLDEN, 1995; MILKOV, 2004). This pool of carbon

376

NETL: Methane Hydrates - DOE/NETL Projects - Properties of Hydrate-Bearing  

NLE Websites -- All DOE Office Websites (Extended Search)

Properties of Hydrate-Bearing Sediments Subjected to Changing Gas Compositions Last Reviewed 12/11/2013 Properties of Hydrate-Bearing Sediments Subjected to Changing Gas Compositions Last Reviewed 12/11/2013 ESD12-011 Goal The objective of this research is to measure physical, chemical, mechanical, and hydrologic property changes in methane hydrate-bearing sediments subjected to injection of carbon dioxide and nitrogen. Performer Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720 Background A number of studies have investigated the impact of injecting carbon dioxide (CO2) and CO2-nitrogen (N2) mixtures into methane hydrate for the purpose of sequestering CO2 and releasing methane (CH4), and review articles have been published summarizing the literature. Most of these studies have investigated the fundamental physical/chemical nature of the exchange of CO2 and/or N2 with CH4 in the clathrate. These studies have

377

METHANE HYDRATE PRODUCTION FROM ALASKAN PERMAFROST  

SciTech Connect

Natural-gas hydrates have been encountered beneath the permafrost and considered a nuisance by the oil and gas industry for years. Engineers working in Russia, Canada and the USA have documented numerous drilling problems, including kicks and uncontrolled gas releases, in arctic regions. Information has been generated in laboratory studies pertaining to the extent, volume, chemistry and phase behavior of gas hydrates. Scientists studying hydrate potential agree that the potential is great--on the North Slope of Alaska alone, it has been estimated at 590 TCF. However, little information has been obtained on physical samples taken from actual rock containing hydrates. The work scope drilled and cored a well The Hot Ice No. 1 on Anadarko leases beginning in FY 2003 and completed in 2004. An on-site core analysis laboratory was built and utilized for determining the physical characteristics of the hydrates and surrounding rock. The well was drilled from a new Anadarko Arctic Platform that has a minimal footprint and environmental impact. The final efforts of the project are to correlate geology, geophysics, logs, and drilling and production data and provide this information to scientists developing reservoir models. No gas hydrates were encountered in this well; however, a wealth of information was generated and is contained in this report. The Hot Ice No. 1 well was drilled from the surface to a measured depth of 2300 ft. There was almost 100% core recovery from the bottom of surface casing at 107 ft to total depth. Based on the best estimate of the bottom of the methane hydrate stability zone (which used new data obtained from Hot Ice No. 1 and new analysis of data from adjacent wells), core was recovered over its complete range. Approximately 580 ft of porous, mostly frozen, sandstone and 155 of conglomerate were recovered in the Ugnu Formation and approximately 215 ft of porous sandstone were recovered in the West Sak Formation. There were gas shows in the bottom part of the Ugnu and throughout the West Sak. No hydrate-bearing zones were identified either in recovered core or on well logs. The base of the permafrost was found at about 1260 ft. With the exception of the deepest sands in the West Sak and some anomalous thin, tight zones, all sands recovered (after thawing) are unconsolidated with high porosity and high permeability. At 800 psi, Ugnu sands have an average porosity of 39.3% and geometrical mean permeability of 3.7 Darcys. Average grain density is 2.64 g/cc. West Sak sands have an average porosity of 35.5%, geometrical mean permeability of 0.3 Darcys, and average grain density of 2.70 g/cc. There were several 1-2 ft intervals of carbonate-cemented sandstone recovered from the West Sak. These intervals have porosities of only a few percent and very low permeability. On a well log they appear as resistive with a high sonic velocity. In shallow sections of other wells these usually are the only logs available. Given the presence of gas in Hot Ice No. 1, if only resistivity and sonic logs and a mud log had been available, tight sand zones may have been interpreted as containing hydrates. Although this finding does not imply that all previously mapped hydrate zones are merely tight sands, it does add a note of caution to the practice of interpreting the presence of hydrates from old well information. The methane hydrate stability zone below the Hot Ice No. 1 location includes thick sections of sandstone and conglomerate which would make excellent reservoir rocks for hydrates and below the permafrost zone shallow gas. The Ugnu formation comprises a more sand-rich section than does the West Sak formation, and the Ugnu sands when cleaned and dried are slightly more porous and significantly more permeable than the West Sak.

Richard Sigal; Kent Newsham; Thomas Williams; Barry Freifeld; Timothy Kneafsey; Carl Sondergeld; Shandra Rai; Jonathan Kwan; Stephen Kirby; Robert Kleinberg; Doug Griffin

2005-02-01T23:59:59.000Z

378

Analysis of core samples from the BPXA-DOE-USGS Mount Elbert gas hydrate stratigraphic test well: Insights into core disturbance and handling  

E-Print Network (OSTI)

during the core recovery, gas and water are produced.Gas produced will displace some water, reducing the density

Kneafsey, Timothy J.

2010-01-01T23:59:59.000Z

379

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

with the bulk water phase, anticipating preferential growth of methane hydrate there. Gas invasion of sediments is one mechanism by which methane hydrates are believed to form....

380

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

before the installation of facilities for hydrate deposits can proceed, and if gas production from hydrate deposits is to become reality. HBS are often unconsolidated, and are...

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

NETL: Oil & Natural Gas Technologies Reference Shelf - Presentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

and quantification of the methane hydrate resource potential associated with the Barrow Gas Field Characterization and quantification of the methane hydrate resource potential...

382

NETL: Methane Hydrates - DOE/NETL Projects - Verification Of Capillary  

NLE Websites -- All DOE Office Websites (Extended Search)

Verification Of Capillary Pressure Functions And Relative Permeability Equations For Modeling Gas Production From Gas Hydrates Last Reviewed 12/12/2013 Verification Of Capillary Pressure Functions And Relative Permeability Equations For Modeling Gas Production From Gas Hydrates Last Reviewed 12/12/2013 DE-FE0009927 Goal The goal of this project is to verify and validate the capillary pressure functions and relative permeability equations that are frequently used in hydrate numerical simulators. In order to achieve this goal, numerical simulation using a network model will be used to suggest fitting parameters, modify existing equations or, if necessary, develop new equations for better simulation results. Performers Wayne State University, Detroit, MI 48202-3622 Background Numerical simulation is used to estimate and predict long-term behavior of hydrate-bearing sediments during gas production [Kurihara et al., 2008;

383

NETL: Methane Hydrates - DOE/NETL Projects - Temporal Characterization of  

NLE Websites -- All DOE Office Websites (Extended Search)

Temporal Characterization of Hydrates System Dynamics Beneath Seafloor Mounds Integrating Time-Lapse Electrical Resistivity Methods and In Situ Observations of Multiple Oceanographic Parameters Last Reviewed 12/18/2013 Temporal Characterization of Hydrates System Dynamics Beneath Seafloor Mounds Integrating Time-Lapse Electrical Resistivity Methods and In Situ Observations of Multiple Oceanographic Parameters Last Reviewed 12/18/2013 DE-FE0010141 Goal The overall objective of the project is to investigate hydrate system dynamics beneath seafloor mounds—a structurally focused example of hydrate occurrence at the landward extreme of their stability field—in the northern Gulf of Mexico. Researchers will conduct observatory-based in situ measurements at Woolsey Mound, MC118 to: Characterize (geophysically) the sub-bottom distribution of hydrate and its temporal variability and, Contemporaneously record relevant environmental parameters (temperature, pressure, salinity, turbidity, bottom currents, and seafloor

384

Methane hydrate formation in turbidite sediments of northern Cascadia IODP Expedition 311  

Science Conference Proceedings (OSTI)

Expedition 311 of the Integrated Ocean Drilling Program (IODP) to northern Cascadia recovered gas-hydrate bearing sediments along a SW–NE transect from the first ridge of the accretionary margin to the eastward limit of gas-hydrate stability. In this study we contrast the gas gas-hydrate distribution from two sites drilled ~8 km apart in different tectonic settings. At Site U1325, drilled on a depositional basin with nearly horizontal sedimentary sequences, the gas-hydrate distribution shows a trend of increasing saturation toward the base of gas-hydrate stability, consistent with several model simulations in the literature. Site U1326 was drilled on an uplifted ridge characterized by faulting, which has likely experienced some mass wasting events. Here the gas hydrate does not show a clear depth-distribution trend, the highest gas-hydrate saturation occurs well within the gas-hydrate stability zone at the shallow depth of ~49 mbsf. Sediments at both sites are characterized by abundant coarse-grained (sand) layers up to 23 cm in thickness, and are interspaced within fine-grained (clay and silty clay) detrital sediments. The gas-hydrate distribution is punctuated by localized depth intervals of high gas-hydrate saturation, which preferentially occur in the coarse-grained horizons and occupy up to 60% of the pore space at Site U1325 and N80% at Site U1326. Detailed analyses of contiguous samples of different lithologies show that when enough methane is present, about 90% of the variance in gas-hydrate saturation can be explained by the sand (N63 ?m) content of the sediments. The variability in gas-hydrate occupancy of sandy horizons at Site U1326 reflects an insufficient methane supply to the sediment section between 190 and 245 mbsf.

Torres, M. E.; Trehu, Ann M.; cespedes, N.; Kastner, Miriam; Wortmann, Ulrich; Kim, J.; Long, Philip E.; Malinverno, Alberto; Pohlman, J. W.; Collett, T. S.

2008-07-15T23:59:59.000Z

385

NETL: Methane Hydrates - DOE/NETL Projects - A New Approach to  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Approach to Understanding the Occurrence and Volume of Natural Gas Hydrate in the Northern Gulf of Mexico Using Petroleum Industry Well Logs Last Reviewed 12/18/2013 A New Approach to Understanding the Occurrence and Volume of Natural Gas Hydrate in the Northern Gulf of Mexico Using Petroleum Industry Well Logs Last Reviewed 12/18/2013 DE-FE0009949 Goal The overarching objective of the project is to significantly increase our understanding of the occurrence, volume, and fine scale distribution of natural gas hydrate in the northern Gulf of Mexico using petroleum industry and Gulf of Mexico Gas Hydrate Joint Industry Project (JIP) well logs. Performer The Ohio State University, Columbus, OH 43210 Background A large quantity of natural gas hydrate certainly occurs within the sediments of the northern Gulf of Mexico; however, the total amount and distribution of gas hydrate across the basin is relatively unconstrained

386

Cement Hydration Modelling  

Science Conference Proceedings (OSTI)

... Courtesy of Technion, Israel Institute of Technology, a Windows XP-based version of the hydration program is available. Many thanks to Prof. ...

2013-06-11T23:59:59.000Z

387

NETL: Methane Hydrates - DOE/NETL Projects - Measurement and Interpretation  

NLE Websites -- All DOE Office Websites (Extended Search)

Measurement and Interpretation of Seismic Velocities and Attenuation in Hydrate-Bearing Sediments Last Reviewed 12/18/2013 Measurement and Interpretation of Seismic Velocities and Attenuation in Hydrate-Bearing Sediments Last Reviewed 12/18/2013 DE-FE0009963 Goal The primary project objectives are to relate seismic and acoustic velocities and attenuations to hydrate saturation and texture. The information collected will be a unique dataset in that seismic attenuation will be acquired within the seismic frequency band. The raw data, when combined with other measurements (e.g., complex resistivity, micro-focus x-ray computed tomography, etc.), will enable researchers to understand not only the interaction between mineral surfaces and gas hydrates, but also how the hydrate formation method affects the hydrate-sediment system in terms of elastic properties. An over-arching goal of this research is to calibrate geophysical

388

Gas Mileage of 2012 Vehicles by Azure Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

MODEL City Comb Hwy 2012 Azure Dynamics Transit Connect Electric Van Automatic (A1), Electricity Compare 2012 Azure Dynamics Transit Connect Electric Van kWh100 mi 55 City 54...

389

Effect of bubble size and density on methane conversion to hydrate  

SciTech Connect

Research is underway at NETL to understand the physical properties of methane hydrates. One area of investigation is the storage of methane as methane hydrates. An economical and efficient means of storing methane in hydrates opens many commercial opportunities such as transport of stranded gas, off-peak storage of line gas, etc.We have observed during our investigations that the ability to convert methane to methane hydrate is enhanced by foaming of the methane–water solution using a surfactant. The density of the foam, along with the bubble size, is important in the conversion of methane to methane hydrate.

Leske, J.; Taylor, C.E.; Ladner, E.P.

2007-03-01T23:59:59.000Z

390

Two Carbon Dynamics and Trace Gas Data Sets from LBA Released  

NLE Websites -- All DOE Office Websites (Extended Search)

Carbon Dynamics and Trace Gas Data Sets from LBA Released The ORNL DAAC and the LBA DIS announce the release of two data sets from the LBA-ECO component of the Large Scale...

391

Gas dynamics in high-luminosity polarized 3He targets using diffusion and convection  

E-Print Network (OSTI)

The dynamics of the movement of gas is discussed for two-chambered polarized 3He target cells of the sort that have been used successfully for many electron-scattering experiments. A detailed analysis is presented showing ...

Kelleher, Aidan Michael

392

Modeling pure methane hydrate dissociation using a numerical simulator from a novel combination of X-ray computed tomography and macroscopic data  

E-Print Network (OSTI)

propane). Gas hydrates are mainly studied in five research areas: flow assurance, energy recovery, climate change, safety,

Gupta, A.

2010-01-01T23:59:59.000Z

393

DOE Announces $2 Million Funding for Methane Hydrates Projects | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE Announces $2 Million Funding for Methane Hydrates Projects DOE Announces $2 Million Funding for Methane Hydrates Projects DOE Announces $2 Million Funding for Methane Hydrates Projects November 7, 2005 - 12:43pm Addthis Seeks to Unlock World's Biggest Potential Source of "Ice That Burns" WASHINGTON, DC - The Department of Energy (DOE) today announced a total of $2 million in funding to five research projects that will assess the energy potential, safety, and environmental aspects of methane hydrate exploration and development. Termed the "ice that burns," methane hydrates are crystalline solids that release a flammable gas when melted. They are considered the Earth's biggest potential source of hydrocarbon energy and could be a key element in meeting natural gas demand in the United States,

394

NETL: National Methane Hydrates R&D Program- 2009 GOM JIP Expedition  

NLE Websites -- All DOE Office Websites (Extended Search)

of fracture-filling gas hydrate. As drilling proceeding, the lack of use of heavy drilling fluids and slow penetration rates (both designed intentionally to maximize the...

395

U.S. and Japan Complete Successful Field Trial of Methane Hydrate Production Technologies  

Energy.gov (U.S. Department of Energy (DOE))

Methane Hydrates May Exceed the Energy Content of All Other Fossil Fuels Combined; Could Ensure Decades of Affordable Natural Gas and Cut America’s Foreign Oil Dependence

396

NETL: Methane Hydrates - DOE/NETL Projects - Controls On Methane...  

NLE Websites -- All DOE Office Websites (Extended Search)

On Methane Expulsion During Melting Of Natural Gas Hydrate Systems Last Reviewed 6242013 DE-FE0010406 Goal The project goal is to predict, given characteristic climate-induced...

397

Methane Hydrate Advisory Committee Charter | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Charter Methane Hydrate Advisory Committee Charter Methane Hydrate Advisory Committee Charter Methane Hydrate Advisory Committee Charter...

398

Understanding Sectoral Labor Market Dynamics: An Equilibrium Analysis of the Oil and Gas Field Services  

E-Print Network (OSTI)

examines the response of employment and wages in the US oil and gas ...eld services industry to changes the dynamic response of wages and employment in the U.S. Oil and Gas Field Services (OGFS) industry to changes in the price of crude petroleum using quarterly data from 1972 to 2002. The oil industry provides an important

Sadoulet, Elisabeth

399

Understanding the Impacts of Incremental Gas Supply on the Flow Dynamics Across the North American Grid  

Reports and Publications (EIA)

The presentation "Understanding the Impacts of Incremental Gas Supply on the Flow Dynamics Across the North American Grid" was given at the Canadian Institute's BC LNG Forum on November 20, 2006. The presentation provides an overview of EIA's long-term natural gas projections under reference case and sensitivity cases from the Annual Energy Outlook 2006, with special emphasis on natural gas flows in the West Coast.

Information Center

2006-12-14T23:59:59.000Z

400

Molecular dynamics study of nanoparticle evolution in a background gas under laser ablation conditions  

E-Print Network (OSTI)

Molecular dynamics study of nanoparticle evolution in a background gas under laser ablation,7] are used to explain the evaporation­condensation process. Molecular dynamics (MD) method [4,5,8,9] directly simulates molecular movement and interactions and can be used to investigate the evaporation process

Zhigilei, Leonid V.

Note: This page contains sample records for the topic "gas hydrate dynamics" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Gas Market Transition: Impacts of Power Generation on Gas Pricing Dynamics  

Science Conference Proceedings (OSTI)

The power sector is beginning to influence the natural gas market, affecting both total natural gas demand and aspects of natural gas price behavior. This report offers a single source that quantifies these influences. With the addition of new gas-fired generating capacity, the use of gas generation in the power sector has grown steadily. However, this progression was arrested after 2002 when the brunt of overbuilding was felt, and gas use in the power sector migrated to ever more efficient units. While ...

2005-03-16T23:59:59.000Z

402

Methane hydrate distribution from prolonged and repeated formation in natural and compacted sand samples: X-ray CT observations  

SciTech Connect

To study physical properties of methane gas hydrate-bearing sediments, it is necessary to synthesize laboratory samples due to the limited availability of cores from natural deposits. X-ray computed tomography (CT) and other observations have shown gas hydrate to occur in a number of morphologies over a variety of sediment types. To aid in understanding formation and growth patterns of hydrate in sediments, methane hydrate was repeatedly formed in laboratory-packed sand samples and in a natural sediment core from the Mount Elbert Stratigraphic Test Well. CT scanning was performed during hydrate formation and decomposition steps, and periodically while the hydrate samples remained under stable conditions for up to 60 days. The investigation revealed the impact of water saturation on location and morphology of hydrate in both laboratory and natural sediments during repeated hydrate formations. Significant redistribution of hydrate and water in the samples was observed over both the short and long term.

Rees, E.V.L.; Kneafsey, T.J.; Seol, Y.

2010-07-01T23:59:59.000Z

403

Methane Hydrates - Methane Hydrate Graduate Fellowship  

NLE Websites -- All DOE Office Websites (Extended Search)

Future Supply and Emerging Resources Future Supply and Emerging Resources The National Methane Hydrates R&D Program - Graduate Fellowship Program Methane Hydrate Graduate Fellowship Program Jeffrey James Marlow, a graduate student in Geobiology at the California Institute of Technology, was recently selected as the 2012 recipient of the NETL-National Academy of Sciences (NAS) Methane Hydrate Research Fellowship. Please see page 15 of the March 2013 issue (Vol. 13, Issue 1) of Fire in the Ice for more information on the recipient. The Department of Energy has a long history of building synergistic relationships with research universities. Funding academic research is a "win-win-win" situation. The U.S. government is able to tap into some of the best minds available for solving national energy problems, the universities get the support they need to maintain cutting edge faculty and laboratories, and the students involved are provided with opportunities that help them along their chosen path of study, strengthening the national pool of scientists and engineers. According to Samuel Bodman, speaking about graduate research in methane hydrates, "Students are the foundation of our energy future, bringing new ideas and fresh perspectives to the energy industry. What better way to assure technology innovation than to encourage students working on the development of a resource that has the potential to tip our energy balance toward clean-burning, domestic fuels."

404

Molecular dynamics simulation of nanoporous graphene for selective gas separation  

E-Print Network (OSTI)

Graphene with sub-nanometer sized pores has the potential to act as a filter for gas separation with considerable efficiency gains compared to traditional technologies. Nanoporous graphene membranes are expected to yield ...

Au, Harold (Harold S.)

2012-01-01T23:59:59.000Z

405

Dispersive and classical shock waves in Bose-Einstein condensates and gas dynamics M. A. Hoefer,1,  

E-Print Network (OSTI)

Dispersive and classical shock waves in Bose-Einstein condensates and gas dynamics M. A. Hoefer,1 cf. Ref. 1 , it is impor- tant to relate this work to the "dispersive gas dynamics" which BEC in a compressible fluid, the weak limit uÂŻ repre- sents an idealized dispersive shock wave. Any compressible gas

Hoefer, Mark

406

Examination of Hydrate Formation Methods: Trying to Create Representative Samples  

Science Conference Proceedings (OSTI)

Forming representative gas hydrate-bearing laboratory samples is important so that the properties of these materials may be measured, while controlling the composition and other variables. Natural samples are rare, and have often experienced pressure and temperature changes that may affect the property to be measured [Waite et al., 2008]. Forming methane hydrate samples in the laboratory has been done a number of ways, each having advantages and disadvantages. The ice-to-hydrate method [Stern et al., 1996], contacts melting ice with methane at the appropriate pressure to form hydrate. The hydrate can then be crushed and mixed with mineral grains under controlled conditions, and then compacted to create laboratory samples of methane hydrate in a mineral medium. The hydrate in these samples will be part of the load-bearing frame of the medium. In the excess gas method [Handa and Stupin, 1992], water is distributed throughout a mineral medium (e.g. packed moist sand, drained sand, moistened silica gel, other porous media) and the mixture is brought to hydrate-stable conditions (chilled and pressurized with gas), allowing hydrate to form. This method typically produces grain-cementing hydrate from pendular water in sand [Waite et al., 2004]. In the dissolved gas method [Tohidi et al., 2002], water with sufficient dissolved guest molecules is brought to hydrate-stable conditions where hydrate forms. In the laboratory, this is can be done by pre-dissolving the gas of interest in water and then introducing it to the sample under the appropriate conditions. With this method, it is easier to form hydrate from more soluble gases such as carbon dioxide. It is thought that this method more closely simulates the way most natural gas hydrate has formed. Laboratory implementation, however, is difficult, and sample formation is prohibitively time consuming [Minagawa et al., 2005; Spangenberg and Kulenkampff, 2005]. In another version of this technique, a specified quantity of gas is placed in a sample, then the sample is flooded with water and cooled [Priest et al., 2009]. We have performed a number of tests in which hydrate was formed and the uniformity of the hydrate formation was examined. These tests have primarily used a variety of modifications of the excess gas method to make the hydrate, although we have also used a version of the excess water technique. Early on, we found difficulties in creating uniform samples with a particular sand/ initial water saturation combination (F-110 Sand, {approx} 35% initial water saturation). In many of our tests we selected this combination intentionally to determine whether we could use a method to make the samples uniform. The following methods were examined: Excess gas, Freeze/thaw/form, Freeze/pressurize/thaw, Excess gas followed by water saturation, Excess water, Sand and kaolinite, Use of a nucleation enhancer (SnoMax), and Use of salt in the water. Below, each method, the underlying hypothesis, and our results are briefly presented, followed by a brief conclusion. Many of the hypotheses investigated are not our own, but were presented to us. Much of the data presented is from x-ray CT scanning our samples. The x-ray CT scanner provides a three-dimensional density map of our samples. From this map and the physics that is occurring in our samples, we are able to gain an understanding of the spatial nature of the processes that occur, and attribute them to the locations where they occur.

Kneafsey, T.J.; Rees, E.V.L.; Nakagawa, S.; Kwon, T.-H.

2011-04-01T23:59:59.000Z

407

Dynamics of inelastic and reactive gas-surface collisions  

DOE Green Energy (OSTI)

The dynamics of inelastic and reactive collisions in atomic beam-surface scattering are presented. The inelastic scattering of hyperthermal rare gaseous atoms from three alkali halide surfaces (LiF, NaCl, GI)was studied to understand mechanical energy transfer in unreactive systems. The dynamics of the chemical reaction in the scattering of H(D) atoms from the surfaces of LIF(001) and the basal plane of graphite were also studied.

Smoliar, L.A.

1995-04-01T23:59:59.000Z

408

NETL: Methane Hydrates - DOE/NETL Projects - NT42496  

NLE Websites -- All DOE Office Websites (Extended Search)

Conducting Scientific Studies of Natural Gas Hydrates to Support the DOE Efforts to Evaluate and Understand Methane Hydrates Last Reviewed 05/16/2011 Conducting Scientific Studies of Natural Gas Hydrates to Support the DOE Efforts to Evaluate and Understand Methane Hydrates Last Reviewed 05/16/2011 DE-AI26-05NT42496 Goal The United States Geological Survey (USGS) conducts scientific studies of natural gas hydrates in support of DOE efforts to evaluate and understand methane hydrates, their potential as an energy resource, and the hazard they may pose to ongoing drilling efforts. This project extends USGS support to the DOE Methane Hydrate Research Program previously supported under DE-AT26-97FT34342 and DE-AT26-97FT34343. Performer U.S. Geological Survey at Denver, CO, Woods Hole, MA, and Menlo Park, CA. Background The USGS Interagency Agreement (IA) involves laboratory research and international field studies in which DOE/NETL has a significant interest.

409

The origin of the hot metal-poor gas in NGC1291: Testing the hypothesis of gas dynamics as the cause of the gas heating  

E-Print Network (OSTI)

In this paper we test the idea that the low-metallicity hot gas in the centre of NGC 1291 is heated via a dynamical process. In this scenario, the gas from the outer gas-rich ring loses energy through bar-driven shocks and falls to the centre. Heating of the gas to X-ray temperatures comes from the high velocity that it reaches ($\\approx$ 700 \\kms) as it falls to the bottom of the potential well. This would explain why the stellar metallicity in the bulge region is around solar while the hot gas metallicity is around 0.1 solar. We carried out an observational test to check this hypothesis by measuring the metallicity of HII regions in the outer ring to check whether they matched the hot gas metallicity. For this purpose we obtained medium resolution long slit spectroscopy with FORS1 on the ESO VLT at Paranal and obtained the metallicities using emission line ratio diagnostics. The obtained metallicities are compatible with the bulge stellar metallicities but very different from the hot-gas metallicity. However, when comparing the different time-scales, the gas in the ring had time enough to get enriched through stellar processes, therefore we cannot rule out the dynamical mechanism as the heating process of the gas. However, the blue colours of the outer ring and the dust structures in the bar region could suggest that the origin of the X-ray hot gas is due to the infall of material from further out.

I. Perez; K. Freeman

2006-04-18T23:59:59.000Z

410

Methane Hydrate Program  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

FY 2011 FY 2011 Methane Hydrate Program Report to Congress July 2012 United States Department of Energy Washington, DC 20585 Department of Energy | July 2012 FY 2011 Methane Hydrate Program Report to Congress | Page ii Message from the Secretary Section 968 of the Energy Policy Act of 2005 requires the Department of Energy to submit to Congress an annual report on the results of methane hydrate research. I am pleased to submit the enclosed report entitled U.S. Department of Energy FY 2011 Methane Hydrate Program Report to Congress. The report was prepared by the Department of Energy's Office of Fossil Energy and summarizes the progress being made in this important area of research. Pursuant to statutory requirements, this report is being provided to the following

411

Methane Hydrate Annual Reports  

Energy.gov (U.S. Department of Energy (DOE))

Section 968 of the Energy Policy Act of 2005 requires the Department of Energy to submit to Congress an annual report on the results of Methane Hydrate research. Listed are the Annual Reports per...

412

Methane Hydrate Program  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Fiscal Year 2012 Fiscal Year 2012 Methane Hydrate Program Report to Congress August 2013 United States Department of Energy Washington, DC 20585 Department of Energy | August 2013 Fiscal Year 2012 Methane Hydrate Program Report to Congress | Page ii Message from the Secretary Section 968 of the Energy Policy Act of 2005 requires the Department of Energy to submit to Congress an annual report on the actions taken to carry out methane hydrate research. I am pleased to submit the enclosed report, entitled U.S. Department of Energy Fiscal Year 2012 Methane Hydrate Program Report to Congress. The report was prepared by the Department of Energy's Office of Fossil Energy and summarizes the progress being made in this important area

413

Methane Hydrate Advisory Committee Meeting Minutes | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Methane Hydrate Advisory Committee Meeting Minutes Methane Hydrate Advisory Committee Meeting Minutes Methane Hydrate Advisory Committee Meeting Minutes June 6th - 7th, 2013...

414

Energy Department Advances Research on Methane Hydrates - the World's  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy Department Advances Research on Methane Hydrates - the Energy Department Advances Research on Methane Hydrates - the World's Largest Untapped Fossil Energy Resource Energy Department Advances Research on Methane Hydrates - the World's Largest Untapped Fossil Energy Resource August 31, 2012 - 1:20pm Addthis News Media Contact (202) 586-4940 WASHINGTON, D.C. - The Energy Department today announced the selection of 14 new research projects across 11 states that will be a part of an expanding portfolio of projects designed to increase our understanding of methane hydrates' potential as a future energy supply. Methane hydrates are 3D ice-lattice structures with natural gas locked inside, and are found both onshore and offshore - including under the Arctic permafrost and in ocean sediments along nearly every continental shelf in the world.

415

Energy Department Advances Research on Methane Hydrates - the World's  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Research on Methane Hydrates - the Research on Methane Hydrates - the World's Largest Untapped Fossil Energy Resource Energy Department Advances Research on Methane Hydrates - the World's Largest Untapped Fossil Energy Resource August 31, 2012 - 1:00pm Addthis Washington, DC - The Energy Department today announced the selection of 14 new research projects across 11 states that will be a part of an expanding portfolio of projects designed to increase our understanding of methane hydrates' potential as a future energy supply. Methane hydrates are 3D ice-lattice structures with natural gas locked inside, and are found both onshore and offshore - including under the Arctic permafrost and in ocean sediments along nearly every continental shelf in the world. Today's projects build on the completion of a successful, unprecedented test

416

Gas Phase Moleculer Dynamics (GPMD) Group | Chemistry Department |  

NLE Websites -- All DOE Office Websites (Extended Search)

GPMD Publications 2007 - present GPMD Publications 2007 - present H.-G. Yu, Ab initio molecular dynamics simulation of photodetachment reaction of cyclopentoxide, Chem. Phys. Lett, 441, 20 (2007). H.-G. Yu, J. T. Muckerman and J.S. Francisco, Quantum force molecular dynamics study ofthe O atoms with HOCO reaction, J. Chem. Phys. 127, 094302 (2007). M. L. Costen and G. E. Hall, Coherent and incoherent orientation and alignment of ICNphotoproducts, Phys. Chem. Chem. Phys. 9, 272-287 (2007). H.-G. Yu, G. Poggi, J.S. Francisco and J. T. Muckerman, Energetics and molecular dynamics of the reaction of HOCO with HO2 radicals, J. Chem. Phys. 129, 214307 (2008). H.-G. Yu and J.S. Francisco, Energetics and kinetics of the reaction of HOCO with hydrogen atoms, J. Chem. Phys. 128, 244315 (2008).

417

Gas release driven dynamics in research reactors piping  

SciTech Connect

Analysis of the physical and chemical processes of radiolysis gas production, air absorption, diffusion controlled gas release and transport in the coolant cleaning system of the research reactor FRM II, which is now being in routine power operation in Munich, Germany, lead to the following conclusions: 1) The steady state pressure distribution in the siphon pipe allows that the horizontal part of the siphon pipe is filled with air. The air is isolated by about 1 m water column from the main pipe of the coolant cleaning system (CCS). This is a stable steady state. It has two positive impacts on the normal operation of the CCS: (a) there is effectively no bypass flow; (b) The air can not be transported through the pipe and therefore no deterioration of the pump performance is expected from the function of the siphon pipe. 2) Radiolysis gas production for coolant, that initially does not contain dissolved air, does not lead to any problem for the system. The gases are dissolved in the coolant at 2.2 bar and are not released for pressures reduction to about 1 bar, which is the minimum pressure in the CCS. 3) Assuming hypothetically a radiolysis gas production for coolant, which initially does contain dissolved air close to its saturation, leads to gas slug formation and its transport up to the pump. This could reduce the pump head and could lead to distortion of the normal operation. Systematic measurement of the hydrogen in the primary system at 100% power indicated, that this state is not realized in the system. The observed H{sub 2} concentration was between 0.016 e-6 and 0.380 e-6 which is of no concern at all. (authors)

Kolev, Nikolay Ivanov; Roloff-Bock, Iris; Schlicht, Gerhard [Framatome ANP, P.O. Box 3220, D-91058, Erlangen (Germany)

2006-07-01T23:59:59.000Z

418

The U.S. DOE Methane Hydrate R&D Program DOE Sponsored Student Researchers  

NLE Websites -- All DOE Office Websites (Extended Search)

U.S. DOE Methane Hydrate R&D Program U.S. DOE Methane Hydrate R&D Program DOE Sponsored Student Researchers Publications and Presentations of DOE Supported Methane Hydrate R&D 1999-2013 December 2013 Table of Contents Section I: Documentation of Support for Education .................................................................................... 5 Additional Post-Degree Assignments at National Labs and USGS .......................................................... 14 Papers Authored and Presentations Given by NETL Methane Hydrate Fellows .................................... 15 Section II: Publications Related to the Program's Major Field Projects .................................................... 21 Alaska North Slope Gas Hydrate Reservoir Characterization (DE-FC26-01NT41332) ............................ 21

419

Methane Hydrates R&D U S  

NLE Websites -- All DOE Office Websites (Extended Search)

the Power of Working Together the Power of Working Together Interagency Coordination on Methane Hydrates R&D U . S . D e p a r t m e n t o f E n e r g y * O f f i c e o f F o s s i l E n e r g y N a t i o n a l E n e r g y T e c h n o l o g y L a b o r a t o r y  Introduction Perhaps no areas of science are receiving more care- ful scrutiny and public discussion than those that deal with the interactions among earth, ocean, climate, and humanity. At the same time, our growing demands for energy are challenging us to find additional sources of clean fuel. The science of methane hydrates, a poten- tially vast source of natural gas that is part of a complex of dynamic natural systems, sits squarely in the center of these issues and the debates that surround them. Over the past two decades, scientists have been

420

Geophysical constraints on the surface distribution of authigenic carbonates across the Hydrate Ridge region,  

E-Print Network (OSTI)

car- bonate and gas hydrate buried by hemipelagic sediments. The similar nature of the category II nature of the conduits can only be speculated at this time. The important observation, however the shallow source of methane and water contained in subsurface and surface gas hydrates. The distribution

Goldfinger, Chris

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421

"Liquid-gas" transition in the supercritical region: Fundamental changes in the particle dynamics  

E-Print Network (OSTI)

Recently, we have proposed a new dynamic line on the phase diagram in the supercritical region. Crossing this line corresponds to the radical changes of the fluid properties. Here, we focus on the dynamics of model Lennard-Jones and Soft-Sphere fluids. We show that the change of the dynamics from the liquid-like to gas-like can be established on the basis of the velocity autocorrelation function and mean-square displacement. Using the rigorous criterion, we show that the crossover of particle dynamics and key liquid properties occurs at the same line. We further show that positive sound dispersion disappears in the vicinity of this line in both kinds of systems. The dynamic line bears no relationship to the existence of the critical point. We find that the region of existence of liquid-like dynamics narrows with the increase of the exponent of the repulsive part of inter-particle potential.

V. V. Brazhkin; Yu. D. Fomin; A. G. Lyapin; V. N. Ryzhov; E. N. Tsiok; Kostya Trachenko

2013-05-16T23:59:59.000Z

422

Quantum dynamics of elementary reactions in the gas phase and on surfaces  

NLE Websites -- All DOE Office Websites (Extended Search)

Quantum Quantum dynamics of elementary reactions in the gas phase and on surfaces Quantum Dynamics of Elementary Reactions in the Gas Phase and on Surfaces Key Challenges: This research addresses several important dynamics issues in elementary chemical reactions. One of the major obstacles in such studies is the quantum nature of the reactions, where the zero-point energy, mode selectivity, dynamical resonances, non-adiabatic transitions, and tunneling play an important role. The calculations are very challenging because of the large number of quantum states involved, and because of the large number of partial waves. The work required development of new methods and new, highly-efficient codes to calculate the total and state-resolved reaction probabilities. Numerically, the calculations are based on sparse

423

Gas Phase Moleculer Dynamics (GPMD) Group | Chemistry Department |  

NLE Websites -- All DOE Office Websites (Extended Search)

Group Members Group Members Greg Hall (Group Leader) Chemical dynamics of unimolecular and bimolecular reactions. High resolution spectroscopic probes of collisional energy transfer processes. Elastic and inelastic interactions responsible for pressure broadening, saturation relaxation and depolarization. Non-adiabatic reactions and multiple surface interactions. Vector correlations and angular momentum polarization probes of chemical dynamics. Applied laser spectroscopy. Trevor Sears (PI) Use of frequency comb techniques for precision spectroscopic measurements in chemical systems. Development of new high resolution and high sensitivity spectroscopic techniques. Free radical spectroscopy relevant to combustion chemistry. Characterization of collisional phenomena and their effects on spectroscopic lineshapes, pressure broadening and sub-Doppler measurements. Hyperfine spectroscopy of 207PbF for potential e-EDM measurements

424

Four Critical Needs to Change the Hydrate Energy Paradigm from Assessment to Production: The 2007 Report to Congress by the U.S. Federal methane Hydrate Advisory Committee  

Science Conference Proceedings (OSTI)

This work summarizes a two-year study by the U.S. Federal Methane Hydrate Advisory Committee recommending the future needs for federally-supported hydrate research. The Report was submitted to the US Congress on August 14, 2007 and includes four recommendations regarding (a) permafrost hydrate production testing, (b) marine hydrate viability assessment (c) climate effect of hydrates, and (d) international cooperation. A secure supply of natural gas is a vital goal of the U.S. national energy policy because natural gas is the cleanest and most widely used of all fossil fuels. The inherent cleanliness of natural gas, with the lowest CO2 emission per unit of heat energy of any fossil fuel, means substituting gas for coal and fuel oil will reduce emissions that can exacerbate the greenhouse effect. Both a fuel and a feedstock, a secure and reasonably priced supply of natural gas is important to industry, electric power generators, large and small commercial enterprises, and homeowners. Because each volume of solid gas hydrate contains as much as 164 standard volumes of methane, hydrates can be viewed as a concentrated form of natural gas equivalent to compressed gas but less concentrated than liquefied natural gas (LNG). Natural hydrate accumulations worldwide are estimated to contain 700,000 TCF of natural gas, of which 200,000 TCF are located within the United States. Compared with the current national annual consumption of 22 TCF, this estimate of in-place gas in enormous. Clearly, if only a fraction of the hydrated methane is recoverable, hydrates could constitute a substantial component of the future energy portfolio of the Nation (Figure 1). However, recovery poses a major technical and commercial challenge. Such numbers have sparked interest in natural gas hydrates as a potential, long-term source of energy, as well as concerns about any potential impact the release of methane from hydrates might have on the environment. Energy-hungry countries such as India and Japan are outspending the United States on hydrate science and engineering R&D by a factor of 10, and may bring this resource to market as much as a decade before the United States.

Mahajan,D.; Sloan, D.; Brewer, P.; Dutta, N.; Johnson, A.; Jones, E.; Juenger, K.; Kastner, M.; Masutani, S.; Swenson, R.; Whelan, J.; Wilson, s.; Woolsey, R.

2009-03-11T23:59:59.000Z

425

Impact of Fuel Interchangeability on dynamic Instabilities in Gas Turbine Engines  

SciTech Connect

Modern, low NOx emitting gas turbines typically utilize lean pre-mixed (LPM) combustion as a means of achieving target emissions goals. As stable combustion in LPM systems is somewhat intolerant to changes in operating conditions, precise engine tuning on a prescribed range of fuel properties is commonly performed to avoid dynamic instabilities. This has raised concerns regarding the use of imported liquefied natural gas (LNG) and natural gas liquids (NGL’s) to offset a reduction in the domestic natural gas supply, which when introduced into the pipeline could alter the fuel BTU content and subsequently exacerbate problems such as combustion instabilities. The intent of this study is to investigate the sensitivity of dynamically unstable test rigs to changes in fuel composition and heat content. Fuel Wobbe number was controlled by blendin