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Sample records for geothermal features hydrothermal

  1. Geothermal reservoirs in hydrothermal convection systems

    SciTech Connect (OSTI)

    Sorey, M.L.

    1982-01-01

    Geothermal reservoirs commonly exist in hydrothermal convection systems involving fluid circulation downward in areas of recharge and upwards in areas of discharge. Because such reservoirs are not isolated from their surroundings, the nature of thermal and hydrologic connections with the rest of the system may have significant effects on the natural state of the reservoir and on its response to development. Conditions observed at numerous developed and undeveloped geothermal fields are discussed with respect to a basic model of the discharge portion of an active hydrothermal convection system. Effects of reservoir development on surficial discharge of thermal fluid are also delineated.

  2. GEOLOGY AND HYDROTHERMAL ALTERATION OF THE RAFT RIVER GEOTHERMAL...

    Open Energy Info (EERE)

    GEOLOGY AND HYDROTHERMAL ALTERATION OF THE RAFT RIVER GEOTHERMAL SYSTEM, IDAHO Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: GEOLOGY...

  3. Digital Mapping Of Structurally Controlled Geothermal Features...

    Open Energy Info (EERE)

    (PCs) were used to map surface geothermal features at the Bradys Hot Springs and Salt Wells geothermal systems, Churchill County, Nevada, in less time and with greater...

  4. Hydrothermal Exploration Best Practices and Geothermal Knowledge...

    Open Energy Info (EERE)

    Knowledge Exchange on Openei Abstract Though exploring for hydrothermal resources is not new, advances in exploration technologies and the pursuit of less visible resources have...

  5. Geothermal Energy Featured on NBC's Today Show | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Featured on NBC's Today Show Geothermal Energy Featured on NBC's Today Show November 18, 2008 - 2:49pm Addthis In Iceland, there are five major geothermal power plants which...

  6. Geothermal Heating and Cooling Systems Featured on NBC Nightly...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Heating and Cooling Systems Featured on NBC Nightly News Geothermal Heating and Cooling Systems Featured on NBC Nightly News April 13, 2009 - 11:24am Addthis NBC Nightly News...

  7. Supply of geothermal power from hydrothermal sources: A study of the cost of power in 20 and 40 years

    SciTech Connect (OSTI)

    Petty, S. (Petty (Susan) Consulting, Solano Beach, CA (United States)); Livesay, B.J. (Livesay Consultants, Inc., Encinitas, CA (United States)); Long, W.P. (Carlin Gold Co., Inc., Grass Valley, CA (United States)); Geyer, J. (Geyer (John) and Associates, Vancouver, WA (United States))

    1992-11-01

    This study develops estimates for the amount of hydrothermal geothermal power that could be on line in 20 and 40 years. This study was intended to represent a snapshot'' in 20 and 40 years of the hydrothermal energy available for electric power production should a market exist for this power. This does not represent the total or maximum amount of hydrothermal power, but is instead an attempt to estimate the rate at which power could be on line constrained by the exploration, development and support infrastructure available to the geothermal industry, but not constrained by the potential market for power.

  8. track 2: hydrothermal | geothermal 2015 peer review | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing ToolInternationalReport FY2014 -EnergyEnergy 1: systems analysis | geothermal 20152:

  9. Doug Hollett Gives Keynote Presentation at Stanford Geothermal...

    Energy Savers [EERE]

    Geothermal Energy Geothermal Home About the Geothermal Technologies Office Enhanced Geothermal Systems Hydrothermal Resources Low-Temperature & Coproduced Resources Systems...

  10. Faults and gravity anomalies over the East Mesa hydrothermal-geothermal system

    SciTech Connect (OSTI)

    Goldstein, N.E.; Carle, S.

    1986-05-01

    Detailed interpretations of gravity anomalies over geothermal systems may be extremely useful for mapping the fracture or fault systems that control the circulation of the thermal waters. This approach seems to be particularly applicable in areas like the Salton Trough where reactions between the thermal waters and the porous sediments produce authigenic-hydrothermal minerals in sufficient quantity to cause distinct gravity anomalies at the surface. A 3-D inversion of the residual Bouguer gravity anomaly over the East Mesa geothermal field was made to examine the densified volume of rock. We show that the data not only resolve a north-south and an intersecting northwest structure, but that it may be possible to distinguish between the active present-day hydrothermal system and an older and cooler part of the system. The densified region is compared spatially to self-potential, thermal and seismic results and we find a good concordance between the different geophysical data sets. Our results agree with previous studies that have indicated that the main feeder fault recharging the East Mesa reservoir dips steeply to the west.

  11. Dominica Grants Geothermal Exploration and Development License...

    Energy Savers [EERE]

    Energy Needs Geothermal Home About the Geothermal Technologies Office Enhanced Geothermal Systems Hydrothermal Resources Low-Temperature & Coproduced Resources Systems...

  12. Geothermal Energy Production with Co-produced and Geopressured...

    Energy Savers [EERE]

    Projects Poster Geothermal Home About the Geothermal Technologies Office Enhanced Geothermal Systems Hydrothermal Resources Low-Temperature & Coproduced Resources Systems...

  13. Halophilic Archaea determined from geothermal steam vent aerosols

    E-Print Network [OSTI]

    Kelley, Scott

    Halophilic Archaea determined from geothermal steam vent aerosols Dean G. Ellis, Richard W. Bizzoco Hydrothermal vents, known as `fumaroles', are ubiq- uitous features of geothermal areas. Although their geology contained halophilic Archaea closely related to the Haloarcula spp. found in non-geothermal salt mats

  14. Evaluation of land ownership, lease status, and surface features in five geopressured geothermal prospects

    SciTech Connect (OSTI)

    Hackenbracht, W.N.

    1981-05-01

    This study was accomplished for the purpose of gathering information pertaining to land and lease ownership, surface features and use and relevant environmental factors in the Lake Theriot (West and East), Kaplan, Bayou Hebert and Freshwater Bayou geopressured geothermal prospects in Louisiana, and the Blessing geopressured geothermal prospect in Texas. This information and recommendations predicated upon it will then be used to augment engineering and geological data utilized to select geopressured geothermal test well sites within the prospects. The five geopressured geothermal prospects are briefly described and recommendations given.

  15. Energy Department Addresses Largest Gathering of Geothermal Energy...

    Broader source: Energy.gov (indexed) [DOE]

    to commercial readiness, including conventional hydrothermal technology and Enhanced Geothermal Systems (EGS) - which significantly expands conventional hydrothermal resources by...

  16. Hydrothermal spallation drilling and advanced energy conversion technologies for Engineered Geothermal Systems

    E-Print Network [OSTI]

    Augustine, Chad R

    2009-01-01

    The purpose of this research was to study the various factors affecting the economic and technical feasibility of Engineered Geothermal Systems, with a special emphasis on advanced drilling technologies. The first part of ...

  17. Geothermal Development and Changes in Surficial Features: Examples from the

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History View New Pages Recent Changes All SpecialGeothermal Development

  18. HEAT AND MASS TRANSFER IN A FAULT-CONTROLLED GEOTHERMAL RESERVOIR CHARGED AT CONSTANT PRESSURE

    E-Print Network [OSTI]

    Goyal, K.P.

    2013-01-01

    in Hydrothermal Systems, Geothermal Resources (eds. L.1975. Heat Transfer in Geothermal Systems, 11 in Advances inI. G. , The Simulation of Geothermal Systems with a Simple

  19. Effects of potential geothermal development in the Corwin Springs Known Geothermal Resources Area, Montana, on the thermal features of Yellowstone National Park. Water Resources Investigation

    SciTech Connect (OSTI)

    Sorey, M.L.

    1991-01-01

    A two-year study by the U.S. Geological Survey, in collaboration with the National Park Service, Argonne National Laboratory, and Los Alamos National Laboratory was initiated in 1988 to determine the effects of potential geothermal development in the Corwin Springs Known Geothermal Resources Area (KGRA), Montana, on the thermal features of Yellowstone National Park. The study addressed three principal issues: (1) the sources of thermal water in the hot springs at Mammoth, La Duke, and Bear Creek; (2) the degree of subsurface connection between these areas; and (3) the effects of geothermal development in the Corwin Springs KGRA on the Park's thermal features. The authors investigations included, but were not limited to, geologic mapping, electrical geophysical surveys, chemical sampling and analyses of waters and rocks, determinations of the rates of discharge of various thermal springs, and hydrologic tracer tests.

  20. Geothermal Case Studies

    SciTech Connect (OSTI)

    Young, Katherine

    2014-09-30

    The US Geological Survey (USGS) resource assessment (Williams et al., 2009) outlined a mean 30GWe of undiscovered hydrothermal resource in the western US. One goal of the Geothermal Technologies Office (GTO) is to accelerate the development of this undiscovered resource. The Geothermal Technologies Program (GTP) Blue Ribbon Panel (GTO, 2011) recommended that DOE focus efforts on helping industry identify hidden geothermal resources to increase geothermal capacity in the near term. Increased exploration activity will produce more prospects, more discoveries, and more readily developable resources. Detailed exploration case studies akin to those found in oil and gas (e.g. Beaumont, et al, 1990) will give operators a single point of information to gather clean, unbiased information on which to build geothermal drilling prospects. To support this effort, the National Renewable Energy laboratory (NREL) has been working with the Department of Energy (DOE) to develop a template for geothermal case studies on the Geothermal Gateway on OpenEI. In fiscal year 2013, the template was developed and tested with two case studies: Raft River Geothermal Area (http://en.openei.org/wiki/Raft_River_Geothermal_Area) and Coso Geothermal Area (http://en.openei.org/wiki/Coso_Geothermal_Area). In fiscal year 2014, ten additional case studies were completed, and additional features were added to the template to allow for more data and the direct citations of data. The template allows for: Data - a variety of data can be collected for each area, including power production information, well field information, geologic information, reservoir information, and geochemistry information. Narratives ? general (e.g. area overview, history and infrastructure), technical (e.g. exploration history, well field description, R&D activities) and geologic narratives (e.g. area geology, hydrothermal system, heat source, geochemistry.) Exploration Activity Catalog - catalog of exploration activities conducted in the area (with dates and references.) NEPA Analysis ? a query of NEPA analyses conducted in the area (that have been catalogued in the OpenEI NEPA database.) In fiscal year 2015, NREL is working with universities to populate additional case studies on OpenEI. The goal is to provide a large enough dataset to start conducting analyses of exploration programs to identify correlations between successful exploration plans for areas with similar geologic occurrence models.

  1. Fluid-inclusion gas composition from an active magmatic-hydrothermal system: a case study of The Geysers, California geothermal field

    E-Print Network [OSTI]

    Moore, Joseph N.; Norman, David I.; Kennedy, B. Mack.

    2001-01-01

    Ed. . , Active geothermal systems and gold–mercury depositsEd. . , Active Geothermal Systems and Gold– Mercury Depositsassoci- ated geothermal systems, alteration, mineralization,

  2. Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations Cedex 02, France. 2 GeoForschungsZentrum Potsdam - Section 2.2, 14473 Potsdam, Germany. 3 Iceland GeoSurvey - ISOR , 108 Reykjavík, Iceland Abstract Structural features of volcanic and hydrothermal systems can

  3. Hydrology of Hydrothermal Systems in the Long Valley Caldera Hydrothermal activity in the Long Valley Caldera has had many different periods in its history of

    E-Print Network [OSTI]

    Polly, David

    the temperatures of the hydrothermal fluid. The geothermal systems and hydrothermal systems have been documented that the temperatures would be extremely high, akin to Yellowstone. But what they found were temperatures much lower). Hydrothermal Systems Summary Geothermal systems and the hydrothermal systems are an occurrence that happens

  4. Behavior of nuclear waste elements during hydrothermal alteration of glassy rhyolite in an active geothermal system: Yellowstone National Park, Wyoming

    SciTech Connect (OSTI)

    Sturchio, N.C.; Seitz, M.G.

    1984-12-31

    The behavior of a group of nuclear waste elements (U, Th, Sr, Zr, Sb, Cs, Ba, and Sm) during hydrothermal alteration of glassy rhyolite is investigated through detailed geochemical analyses of whole rocks, glass and mineral separates, and thermal waters. Significant mobility of U, Sr, Sb, Cs, and Ba is found, and the role of sorption processes in their observed behavior is identified. Th, Zr, and Sm are relatively immobile, except on a microscopic scale. 9 references, 2 figures, 2 tables.

  5. Fluid Inclusion Gas Compositions From An Active Magmatic-Hydrothermal...

    Open Energy Info (EERE)

    Fluid Inclusion Gas Compositions From An Active Magmatic-Hydrothermal System- A Case Study Of The Geysers Geothermal Field, Usa Jump to: navigation, search OpenEI Reference...

  6. Volatiles in hydrothermal fluids- A mass spectrometric study...

    Open Energy Info (EERE)

    Volatiles in hydrothermal fluids- A mass spectrometric study of fluid inclusions from active geothermal systems Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  7. Helium isotope study of geothermal features in Chile with field and laboratory data

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Dobson, Patrick

    Dobson, P.F., Kennedy, B.M., Reich, M., Sanchez, P., and Morata, D. (2013) Effects of volcanism, crustal thickness, and large scale faulting on the He isotope signatures of geothermal systems in Chile. Proceedings, 38th Workshop on Geothermal Reservoir Engineering, Stanford University, Feb. 11-13, 2013

  8. Helium isotope study of geothermal features in Chile with field and laboratory data

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Dobson, Patrick

    2013-02-11

    Dobson, P.F., Kennedy, B.M., Reich, M., Sanchez, P., and Morata, D. (2013) Effects of volcanism, crustal thickness, and large scale faulting on the He isotope signatures of geothermal systems in Chile. Proceedings, 38th Workshop on Geothermal Reservoir Engineering, Stanford University, Feb. 11-13, 2013

  9. 2015 Peer Review Presentations | Geothermal Energy | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    2015 Peer Review Presentations | Geothermal Energy 2015 Peer Review Presentations | Geothermal Energy The Energy Department featured Play Fairway Analysis at the 2015 Geothermal...

  10. Magnetotellurics At Dixie Valley Geothermal Area (Wannamaker...

    Open Energy Info (EERE)

    Geothermal Area, Nevada- Structural Controls, Hydrothermal Alteration and Deep Fluid Sources Additional References Retrieved from "http:en.openei.orgwindex.php?titleMagne...

  11. Paleomagnetic Measurements At Roosevelt Hot Springs Geothermal...

    Open Energy Info (EERE)

    Hot Springs Geothermal Area. Notes Paleomagnetic dating performed by Brown (1977) on opal samples in order to date the age of the hydrothermal system. The results were highly...

  12. Correlation of hydrothermal sericite composition with permeability...

    Open Energy Info (EERE)

    of aqueous species in the geothermal fluids were combined with activity phase diagrams accounting for hydrothermal sericite compositions to determine a pH of 6.1 for the...

  13. Structural investigations of Great Basin geothermal fields: Applications and implications

    SciTech Connect (OSTI)

    Faulds, James E; Hinz, Nicholas H.; Coolbaugh, Mark F

    2010-11-01

    Because fractures and faults are commonly the primary pathway for deeply circulating hydrothermal fluids, structural studies are critical to assessing geothermal systems and selecting drilling targets for geothermal wells. Important tools for structural analysis include detailed geologic mapping, kinematic analysis of faults, and estimations of stress orientations. Structural assessments are especially useful for evaluating geothermal fields in the Great Basin of the western USA, where regional extension and transtension combine with high heat flow to generate abundant geothermal activity in regions having little recent volcanic activity. The northwestern Great Basin is one of the most geothermally active areas in the USA. The prolific geothermal activity is probably due to enhanced dilation on N- to NNE-striking normal faults induced by a transfer of NW-directed dextral shear from the Walker Lane to NW-directed extension. Analysis of several geothermal fields suggests that most systems occupy discrete steps in normal fault zones or lie in belts of intersecting, overlapping, and/or terminating faults. Most fields are associated with steeply dipping faults and, in many cases, with Quaternary faults. The structural settings favoring geothermal activity are characterized by subvertical conduits of highly fractured rock along fault zones oriented approximately perpendicular to the WNW-trending least principal stress. Features indicative of these settings that may be helpful in guiding exploration for geothermal resources include major steps in normal faults, interbasinal highs, groups of relatively low discontinuous ridges, and lateral jogs or terminations of mountain ranges.

  14. Hydrothermal industrialization: direct heat development. Final report

    SciTech Connect (OSTI)

    Not Available

    1982-05-01

    A description of hydrothermal resources suitable for direct applications, their associated temperatures, geographic distribution and developable capacity are given. An overview of the hydrothermal direct-heat development infrastructure is presented. Development activity is highlighted by examining known and planned geothermal direct-use applications. Underlying assumptions and results for three studies conducted to determine direct-use market penetration of geothermal energy are discussed.

  15. Geothermal Technologies Newsletter

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy's (DOE) Geothermal Technologies Newsletter features the latest information about its geothermal research and development efforts. The Geothermal Resources Council (GRC)— a tax-exempt, non-profit, geothermal educational association — publishes quarterly as an insert in its GRC Bulletin.

  16. Hydrothermal Processing

    SciTech Connect (OSTI)

    Elliott, Douglas C.

    2011-03-11

    This chapter is a contribution to a book on Thermochemical Conversion of Biomass being edited by Prof. Robert Brown of Iowa State University. It describes both hydrothermal liquefaction and hydrothermal gasification of biomass to fuels.

  17. Geothermal Regulatory Roadmap featured on NREL Now | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavy ElectricalsFTL SolarGate Solar JumpGeothermal Regulatory Roadmap

  18. Time-Domain Electromagnetics At Long Valley Caldera Geothermal...

    Open Energy Info (EERE)

    were designed to assess the Long Valley hydrothermal system and to identify possible deep geothermal drilling targets beneath the western portion of the caldera. Notes The...

  19. Climate Change Update: Baseload Geothermal is One of the Lowest...

    Broader source: Energy.gov (indexed) [DOE]

    over 30 GWe from new hydrothermal resources, and more than 100 GWe from enhanced geothermal systems (EGS). Together, these technologies could lead to greater than 10 percent of...

  20. Geothermal Exploration Case Studies on OpenEI (Presentation)

    SciTech Connect (OSTI)

    Young, K.; Bennett, M.; Atkins, D.

    2014-03-01

    The U.S. Geological Survey (USGS) resource assessment (Williams et al., 2008) outlined a mean 30 GWe of undiscovered hydrothermal resource in the western United States. One goal of the U.S. Department of Energy's (DOE) Geothermal Technology Office (GTO) is to accelerate the development of this undiscovered resource. DOE has focused efforts on helping industry identify hidden geothermal resources to increase geothermal capacity in the near term. Increased exploration activity will produce more prospects, more discoveries, and more readily developable resources. Detailed exploration case studies akin to those found in oil and gas (e.g. Beaumont and Foster, 1990-1992) will give developers central location for information gives models for identifying new geothermal areas, and guide efficient exploration and development of these areas. To support this effort, the National Renewable Energy Laboratory (NREL) has been working with GTO to develop a template for geothermal case studies on the Geothermal Gateway on OpenEI. In 2012, the template was developed and tested with two case studies: Raft River Geothermal Area (http://en.openei.org/wiki/Raft_River_Geothermal_Area) and Coso Geothermal Area (http://en.openei.org/wiki/Coso_Geothermal_Area). In 2013, ten additional case studies were completed, and Semantic MediaWiki features were developed to allow for more data and the direct citations of these data. These case studies are now in the process of external peer review. In 2014, NREL is working with universities and industry partners to populate additional case studies on OpenEI. The goal is to provide a large enough data set to start conducting analyses of exploration programs to identify correlations between successful exploration plans for areas with similar geologic occurrence models.

  1. Convective heat transport in geothermal systems

    SciTech Connect (OSTI)

    Lippmann, M.J.; Bodvarsson, G.S.

    1986-08-01

    Most geothermal systems under exploitation for direct use or electrical power production are of the hydrothermal type, where heat is transferred essentially by convection in the reservoir, conduction being secondary. In geothermal systems, buoyancy effects are generally important, but often the fluid and heat flow patterns are largely controlled by geologic features (e.g., faults, fractures, continuity of layers) and location of recharge and discharge zones. During exploitation, these flow patterns can drastically change in response to pressure and temperature declines, and changes in recharge/discharge patterns. Convective circulation models of several geothermal systems, before and after start of fluid production, are described, with emphasis on different characteristics of the systems and the effects of exploitation on their evolution. Convective heat transport in geothermal fields is discussed, taking into consideration (1) major geologic features; (2) temperature-dependent rock and fluid properties; (3) fracture- versus porous-medium characteristics; (4) single- versus two-phase reservoir systems; and (5) the presence of noncondensible gases.

  2. Direct use of hydrothermal energy: a review of environmental aspects

    SciTech Connect (OSTI)

    O'Banion, K.; Layton, D.

    1981-08-28

    The potential environmental impacts of the exploration, development, and production of hydrothermal geothermal energy for direct use applications are reviewed and evaluated. Mitigation strategies and research and development needs are included. (MHR)

  3. Geothermal Regulatory Roadmap | OpenEI Community

    Open Energy Info (EERE)

    geothermal Type Term Title Author Replies Last Post sort icon Blog entry geothermal Geothermal Regulatory Roadmap featured on NREL Now Graham7781 5 Aug 2013 - 14:18 Blog entry...

  4. Funding Opportunity: Geothermal Technologies Program Seeks Technologie...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of electricity from new hydrothermal development to 6 kWh by 2020 and Enhanced Geothermal Systems (EGS) to 6 kWh by 2030. For more information, see this funding...

  5. National Geothermal Data System: Case Studies on Exploration and Development of Potential Geothermal Sites Through Distributed Data Sharing

    SciTech Connect (OSTI)

    Anderson, Arlene; Allison, Lee; Richard, Steve; Caudill-Daugherty, Christy; Patten, Kim

    2014-09-29

    The NGDS released version 1 of the system on April 30, 2014 using the US Geoscience Information Network (USGIN) as its data integration platform. NGDS supports the 2013 Open Data Policy, and as such, the launch was featured at the 2014 Energy Datapalooza. Currently, the NGDS features a comprehensive user interface for searching and accessing nearly 41,000 documents and more than 9 million data points shared by scores of data providers across the U.S. The NGDS supports distributed data sharing, permitting the data owners to maintain the raw data that is made available to the consumer. Researchers and industry have been utilizing the NGDS as a mechanism for promoting geothermal development across the country, from hydrothermal to ground source heat pump applications. Case studies in geothermal research and exploration from across the country are highlighted.

  6. Hydrothermal Resources Fact Sheet

    SciTech Connect (OSTI)

    U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy

    2012-08-31

    This two-page fact sheet provides an overview of hydrothermal resources and hydrothermal reservoir creation and operation.

  7. Burgett Geothermal Greenhouses Greenhouse Low Temperature Geothermal...

    Open Energy Info (EERE)

    Burgett Geothermal Greenhouses Greenhouse Low Temperature Geothermal Facility Jump to: navigation, search Name Burgett Geothermal Greenhouses Greenhouse Low Temperature Geothermal...

  8. Jobs and Economic Development Impact (JEDI) Model Geothermal User Reference Guide

    SciTech Connect (OSTI)

    Johnson, C.; Augustine, C.; Goldberg, M.

    2012-09-01

    The Geothermal Jobs and Economic Development Impact (JEDI) model, developed through the National Renewable Energy Laboratory (NREL), is an Excel-based user-friendly tools that estimates the economic impacts of constructing and operating hydrothermal and Enhanced Geothermal System (EGS) power generation projects at the local level for a range of conventional and renewable energy technologies. The JEDI Model Geothermal User Reference Guide was developed to assist users in using and understanding the model. This guide provides information on the model's underlying methodology, as well as the parameters and references used to develop the cost data utilized in the model. This guide also provides basic instruction on model add-in features, operation of the model, and a discussion of how the results should be interpreted.

  9. PROCEEDINGS, Thirty-Fourth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 9-11, 2009

    E-Print Network [OSTI]

    Stanford University

    of the geothermal heat-carriers began to be used for power generation. On the hydrothermal deposit in Turkey 10 % for 24 hours to

  10. Updated U.S. Geothermal Supply Curve

    SciTech Connect (OSTI)

    Augustine, C.; Young, K. R.; Anderson, A.

    2010-02-01

    This paper documents the approach used to update the U.S. geothermal supply curve. The analysis undertaken in this study estimates the supply of electricity generation potential from geothermal resources in the United States and the levelized cost of electricity (LCOE), capital costs, and operating and maintenance costs associated with developing these geothermal resources. Supply curves were developed for four categories of geothermal resources: identified hydrothermal (6.4 GWe), undiscovered hydrothermal (30.0 GWe), near-hydrothermal field enhanced geothermal systems (EGS) (7.0 GWe) and deep EGS (15,900 GWe). Two cases were considered: a base case and a target case. Supply curves were generated for each of the four geothermal resource categories for both cases. For both cases, hydrothermal resources dominate the lower cost range of the combined geothermal supply curve. The supply curves indicate that the reservoir performance improvements assumed in the target case could significantly lower EGS costs and greatly increase EGS deployment over the base case.

  11. Geothermal program review 16: Proceedings. A strategic plan for geothermal research

    SciTech Connect (OSTI)

    1998-12-31

    The proceedings contain 21 papers arranged under the following topical sections: Exploration technology (4 papers); Reservoir technology (5 papers); Energy conversion technology (8 papers); Drilling technology (2 papers); and Direct use and geothermal heat pump technology (2 papers). An additional section contains a report on a workshop on dual-use technologies for hydrothermal and advanced geothermal reservoirs.

  12. Proceedings 23rd NZ Geothermal Workshop 2001

    E-Print Network [OSTI]

    Benning, Liane G.

    Proceedings 23rd NZ Geothermal Workshop 2001 BIOMINERALIZATION IN NEW ZEALAND GEOTHERMAL AREAS B deposits at New Zealand geothermal areas,. Preliminary results are presented from three areas: Wairakei Zealand geothermal areas are well known for their spectacular surface features. The overall distribution

  13. Geothermal power development in Hawaii. Volume I. Review and analysis

    SciTech Connect (OSTI)

    Not Available

    1982-06-01

    The history of geothermal exploration in Hawaii is reviewed briefly. The nature and occurrences of geothermal resources are presented island by island. An overview of geothermal markets is presented. Other topies covered are: potential markets of the identified geothermal areas, well drilling technology, hydrothermal fluid transport, overland and submarine electrical transmission, community aspects of geothermal development, legal and policy issues associated with mineral and land ownership, logistics and infrastructure, legislation and permitting, land use controls, Regulation 8, Public Utilities Commission, political climate and environment, state plans, county plans, geothermal development risks, and business planning guidelines.

  14. The National Energy Strategy - The role of geothermal technology development: Proceedings

    SciTech Connect (OSTI)

    Not Available

    1990-01-01

    Each year the Geothermal Division of the US Department of Energy conducts an in-depth review of its entire geothermal R D program. The conference serves several purposes: a status report on current R D activities, an assessment of progress and problems, a review of management issues, and a technology transfer opportunity between DOE and the US geothermal industry. Topics in this year's conference included Hydrothermal Energy Conversion Technology, Hydrothermal Reservoir Technology, Hydrothermal Hard Rock Penetration Technology, Hot Dry Rock Technology, Geopressured-Geothermal Technology and Magma Energy Technology. Each individual paper has been cataloged separately.

  15. Geothermal energy program summary

    SciTech Connect (OSTI)

    Not Available

    1990-01-01

    The Geothermal Technology Division (GTD) of the US Department of Energy (DOE) is charged with the lead federal role in the research and development (R D) of technologies that will assist industry in economically exploiting the nation's vast geothermal resources. The GTD R D Program represents a comprehensive, balanced approach to establishing all forms of geothermal energy as significant contributors to the nation's energy supply. It is structured both to maintain momentum in the growth of the existing hydrothermal industry and to develop long-term options offering the greatest promise for practical applications. This volume, Volume 2, contains a detailed compilation of each GTD-funded R D activity performed by national laboratories or under contract to industrial, academic, and nonprofit research institutions.

  16. Electrical resistivity and magnetic investigations of the geothermal systems in the Rotorua area, New Zealand

    SciTech Connect (OSTI)

    Bibby, H.M. ); Dawson, G.B.; Rayner, H.H.; Bennie, S.L.; Bromley, C.J. )

    1992-04-01

    This paper reports that electrical and magnetic data are used in an investigation of a 450 km{sup 2} region in order to delineate the Rotorua City Geothermal system and determine its relationship with other geothermal systems in the region. Three distinct regions of low ({lt}30 Omega m) apparent resistivity are delineated. The southern of these outlines the Rotorua City Geothermal System which has an area of about 18 km{sup 2}, with the northern third covered by Lake Rotorua. The boundary of the system is characterized by a rapid lateral change in apparent resistivity which can be modeled as a single, near vertical zone in which the distance between hot and cold water is very narrow. Magnetic properties also change in the vicinity of the discontinuity in some areas, consistent with hydrothermal alteration having destroyed the magnetite in the rocks of the geothermal system. Hot water is believed to be rising, driven by buoyancy forces across the whole of the low resistivity region. There is some indication, particularly in the south, that the boundary between hot and cold fluids dips away from the field. A second low resistivity zone (the East Lake Rotorua anomaly) with an area of about 8 km{sup 2}, is believed to outline a second independent geothermal system, with surface manifestations on Mokoia Island, and on the eastern shore of the lake. High heat flow in lake bottom sediments, and a reduction in magnetic signature over this region supports this conclusion. A third resistivity low under the west of Lake Rotorua has no associated thermal features and is believed to be a fossil hydrothermal system. There is no apparent relationship between the location of the geothermal systems and the Rotorua caldera. The aeromagnetic measurements have delineated several highly magnetic bodies which cannot be linked with surface geology. These are believed to be caused by buried rhyolite dome complexes at shallow depth.

  17. Depth determinations of shallow hydrothermal systems by self-potential and multi-scale wavelet tomography

    E-Print Network [OSTI]

    Williams-Jones, Glyn

    to significantly enhance our ability to locate geothermal systems and monitor active volcanoes. © 2010 Elsevier BDepth determinations of shallow hydrothermal systems by self-potential and multi-scale wavelet studies, the depth of the hydrothermal system is always required, but rarely known via traditional

  18. Features

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid you not find whatGasEnergy Technologies |Feature Stories

  19. Geothermal Literature Review At International Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At International Geothermal Area, Italy (Ranalli & Rybach, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

  20. Geothermal Literature Review At International Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At International Geothermal Area, Iceland (Ranalli & Rybach, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

  1. Geothermal Energy Association Recognizes the National Geothermal...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Geothermal Energy Association Recognizes the National Geothermal Data System Geothermal Energy Association Recognizes the National Geothermal Data System July 29, 2014 - 8:20am...

  2. Geothermal Energy Summary

    SciTech Connect (OSTI)

    J. L. Renner

    2007-08-01

    Following is complete draft.Geothermal Summary for AAPG Explorer J. L. Renner, Idaho National Laboratory Geothermal energy is used to produce electricity in 24 countries. The United States has the largest capacity (2,544 MWe) followed by Philippines (1,931 MWe), Mexico (953 MWe), Indonesia (797 MWe), and Italy (791 MWe) (Bertani, 2005). When Chevron Corporation purchased Unocal Corporation they became the leading producer of geothermal energy worldwide with projects in Indonesia and the Philippines. The U. S. geothermal industry is booming thanks to increasing energy prices, renewable portfolio standards, and a production tax credit. California (2,244 MWe) is the leading producer, followed by Nevada (243 MWe), Utah (26 MWe) and Hawaii (30 MWe) and Alaska (0.4 MWe) (Bertani, 2005). Alaska joined the producing states with two 0.4 KWe power plants placed on line at Chena Hot Springs during 2006. The plant uses 30 liters per second of 75°C water from shallow wells. Power production is assisted by the availability of gravity fed, 7°C cooling water (http://www.yourownpower.com/) A 13 MWe binary power plant is expected to begin production in the fall of 2007 at Raft River in southeastern Idaho. Idaho also is a leader in direct use of geothermal energy with the state capital building and several other state and Boise City buildings as well as commercial and residential space heated using fluids from several, interconnected geothermal systems. The Energy Policy Act of 2005 modified leasing provisions and royalty rates for both geothermal electrical production and direct use. Pursuant to the legislation the Bureau of Land management and Minerals Management Service published final regulations for continued geothermal leasing, operations and royalty collection in the Federal Register (Vol. 72, No. 84 Wednesday May 2, 2007, BLM p. 24358-24446, MMS p. 24448-24469). Existing U. S. plants focus on high-grade geothermal systems located in the west. However, interest in non-traditional geothermal development is increasing. A comprehensive new MIT-led study of the potential for geothermal energy within the United States predicts that mining the huge amounts of stored thermal energy in the Earth’s crust not associated with hydrothermal systems, could supply a substantial portion of U.S. electricity with minimal environmental impact (Tester, et al., 2006, available at http://geothermal.inl.gov). There is also renewed interest in geothermal production from other non-traditional sources such as the overpressured zones in the Gulf Coast and warm water co-produced with oil and gas. Ormat Technologies, Inc., a major geothermal company, recently acquired geothermal leases in the offshore overpressured zone of Texas. Ormat and the Rocky Mountain Oilfield Testing Center recently announced plans to jointly produce geothermal power from co-produced water from the Teapot Dome oilfield (Casper Star-Tribune, March 2, 2007). RMOTC estimates that 300 KWe capacity is available from the 40,000 BWPD of 88°C water associated with oil production from the Tensleep Sandstone (Milliken, 2007). The U. S. Department of Energy is seeking industry partners to develop electrical generation at other operating oil and gas fields (for more information see: https://e-center.doe.gov/iips/faopor.nsf/UNID/50D3734745055A73852572CA006665B1?OpenDocument). Several web sites offer periodically updated information related to the geothermal industry and th

  3. Fluid origin, gas fluxes and plumbing system in the sediment-hosted Salton Sea Geothermal System (California, USA)

    E-Print Network [OSTI]

    Svensen, Henrik

    Fluid origin, gas fluxes and plumbing system in the sediment-hosted Salton Sea Geothermal System Available online 12 June 2011 Keywords: Salton Sea Geothermal System hydrothermal seeps gas and water geochemistry flux measurements mantle The Salton Sea Geothermal System (California) is an easily accessible

  4. Geothermal Regulatory Roadmap | OpenEI Community

    Open Energy Info (EERE)

    References Geothermal Regulatory Roadmap featured on NREL Now Texas Legal Review GRR 3rd Quarter - Stakeholder Update Meeting more Group members (12) Managers: Kyoung Recent...

  5. Neutron imaging for geothermal energy systems

    SciTech Connect (OSTI)

    Bingham, Philip R; Anovitz, Lawrence {Larry} M; Polsky, Yarom

    2013-01-01

    Geothermal systems extract heat energy from the interior of the earth using a working fluid, typically water. Three components are required for a commercially viable geothermal system: heat, fluid, and permeability. Current commercial electricity production using geothermal energy occurs where the three main components exist naturally. These are called hydrothermal systems. In the US, there is an estimated 30 GW of base load electrical power potential for hydrothermal sites. Next generation geothermal systems, named Enhanced Geothermal Systems (EGS), have an estimated potential of 4500 GW. EGSs lack in-situ fluid, permeability or both. As such, the heat exchange system must be developed or engineered within the rock. The envisioned method for producing permeability in the EGS reservoir is hydraulic fracturing, which is rarely practiced in the geothermal industry, and not well understood for the rocks typically present in geothermal reservoirs. High costs associated with trial and error learning in the field have led to an effort to characterize fluid flow and fracturing mechanisms in the laboratory to better understand how to design and manage EGS reservoirs. Neutron radiography has been investigated for potential use in this characterization. An environmental chamber has been developed that is suitable for reproduction of EGS pressures and temperatures and has been tested for both flow and precipitations studies with success for air/liquid interface imaging and 3D reconstruction of precipitation within the core.

  6. Strategies for Detecting Hidden Geothermal Systems by Near-Surface Gas Monitoring

    SciTech Connect (OSTI)

    Lewicki, Jennifer L.; Oldenburg, Curtis M.

    2004-12-15

    ''Hidden'' geothermal systems are those systems above which hydrothermal surface features (e.g., hot springs, fumaroles, elevated ground temperatures, hydrothermal alteration) are lacking. Emissions of moderate to low solubility gases (e.g., CO2, CH4, He) may be one of the primary near-surface signals from these systems. Detection of anomalous gas emissions related to hidden geothermal systems may therefore be an important tool to discover new geothermal resources. This study investigates the potential for CO2 detection and monitoring in the subsurface and above ground in the near-surface environment to serve as a tool to discover hidden geothermal systems. We focus the investigation on CO2 due to (1) its abundance in geothermal systems, (2) its moderate solubility in water, and (3) the wide range of technologies available to monitor CO2 in the near-surface environment. However, monitoring in the near-surface environment for CO2 derived from hidden geothermal reservoirs is complicated by the large variation in CO2 fluxes and concentrations arising from natural biological and hydrologic processes. In the near-surface environment, the flow and transport of CO2 at high concentrations will be controlled by its high density, low viscosity, and high solubility in water relative to air. Numerical simulations of CO2 migration show that CO2 concentrations can reach very high levels in the shallow subsurface even for relatively low geothermal source CO2 fluxes. However, once CO2 seeps out of the ground into the atmospheric surface layer, surface winds are effective at dispersing CO2 seepage. In natural ecological systems in the absence of geothermal gas emissions, near-surface CO2 fluxes and concentrations are primarily controlled by CO2 uptake by photosynthesis, production by root respiration, and microbial decomposition of soil/subsoil organic matter, groundwater degassing, and exchange with the atmosphere. Available technologies for monitoring CO2 in the near-surface environment include (1) the infrared gas analyzer (IRGA) for measurement of concentrations at point locations, (2) the accumulation chamber (AC) method for measuring soil CO2 fluxes at point locations, (3) the eddy covariance (EC) method for measuring net CO2 flux over a given area, (4) hyperspectral imaging of vegetative stress resulting from elevated CO2 concentrations, and (5) light detection and ranging (LIDAR) that can measure CO2 concentrations over an integrated path. Technologies currently in developmental stages that have the potential to be used for CO2 monitoring include tunable lasers for long distance integrated concentration measurements and micro-electronic mechanical systems (MEMS) that can make widespread point measurements. To address the challenge of detecting potentially small-magnitude geothermal CO2 emissions within the natural background variability of CO2, we propose an approach that integrates available detection and monitoring methodologies with statistical analysis and modeling strategies. Within the area targeted for geothermal exploration, point measurements of soil CO2 fluxes and concentrations using the AC method and a portable IRGA, respectively, and measurements of net surface flux using EC should be made. Also, the natural spatial and temporal variability of surface CO2 fluxes and subsurface CO2 concentrations should be quantified within a background area with similar geologic, climatic, and ecosystem characteristics to the area targeted for geothermal exploration. Statistical analyses of data collected from both areas should be used to guide sampling strategy, discern spatial patterns that may be indicative of geothermal CO2 emissions, and assess the presence (or absence) of geothermal CO2 within the natural background variability with a desired confidence level. Once measured CO2 concentrations and fluxes have been determined to be of anomalous geothermal origin with high confidence, more expensive vertical subsurface gas sampling and chemical and isotopic analyses can be undertaken. Integrated analysis of all measurements will d

  7. Federal Geothermal Research Program Update Fiscal Year 1998

    SciTech Connect (OSTI)

    Keller, J.G.

    1999-05-01

    This report reviews the specific objectives, status, and accomplishments of DOE's Geothermal Research Program for Fiscal Year 1998. The Exploration Technology research area focuses on developing instruments and techniques to discover hidden hydrothermal systems and to expose the deep portions of known systems. The Reservoir Technology research combines laboratory and analytical investigations with equipment development and field testing to establish practical tools for resource development and management for both hydrothermal and hot dry rock reservoirs. The Drilling Technology projects focus on developing improved, economic drilling and completion technology for geothermal wells. The Conversion Technology research focuses on reducing costs and improving binary conversion cycle efficiency, to permit greater use of the more abundant moderate-temperature geothermal resource, and on the development of materials that will improve the operating characteristics of many types of geothermal energy equipment. Direct use research covers the direct use of geothermal energy sources for applications in other than electrical production.

  8. Alternative Geothermal Power Production Scenarios

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Sullivan, John

    The information given in this file pertains to Argonne LCAs of the plant cycle stage for a set of ten new geothermal scenario pairs, each comprised of a reference and improved case. These analyses were conducted to compare environmental performances among the scenarios and cases. The types of plants evaluated are hydrothermal binary and flash and Enhanced Geothermal Systems (EGS) binary and flash plants. Each scenario pair was developed by the LCOE group using GETEM as a way to identify plant operational and resource combinations that could reduce geothermal power plant LCOE values. Based on the specified plant and well field characteristics (plant type, capacity, capacity factor and lifetime, and well numbers and depths) for each case of each pair, Argonne generated a corresponding set of material to power ratios (MPRs) and greenhouse gas and fossil energy ratios.

  9. Alternative Geothermal Power Production Scenarios

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Sullivan, John

    2014-03-14

    The information given in this file pertains to Argonne LCAs of the plant cycle stage for a set of ten new geothermal scenario pairs, each comprised of a reference and improved case. These analyses were conducted to compare environmental performances among the scenarios and cases. The types of plants evaluated are hydrothermal binary and flash and Enhanced Geothermal Systems (EGS) binary and flash plants. Each scenario pair was developed by the LCOE group using GETEM as a way to identify plant operational and resource combinations that could reduce geothermal power plant LCOE values. Based on the specified plant and well field characteristics (plant type, capacity, capacity factor and lifetime, and well numbers and depths) for each case of each pair, Argonne generated a corresponding set of material to power ratios (MPRs) and greenhouse gas and fossil energy ratios.

  10. development Not Available 15 GEOTHERMAL ENERGY; TONGONAN GEOTHERMAL...

    Office of Scientific and Technical Information (OSTI)

    field Leyte, Philippines. Report on exploration and development Not Available 15 GEOTHERMAL ENERGY; TONGONAN GEOTHERMAL FIELD; GEOTHERMAL EXPLORATION; GEOTHERMAL POWER...

  11. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Farhar, 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  12. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Rafferty, 1997) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  13. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Witcher, 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  14. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Sammel, 1978) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  15. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Lienau, 1990) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  16. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Callender, 1981) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  17. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Grant, 1978) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  18. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Smith, 1978) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  19. Geothermal Power and Interconnection: The Economics of Getting to Market

    SciTech Connect (OSTI)

    Hurlbut, D.

    2012-04-01

    This report provides a baseline description of the transmission issues affecting geothermal technologies. The report begins with a comprehensive overview of the grid, how it is planned, how it is used, and how it is paid for. The report then overlays onto this 'big picture' three types of geothermal technologies: conventional hydrothermal systems; emerging technologies such as enhanced engineered geothermal systems (EGS) and geopressured geothermal; and geothermal co-production with existing oil and gas wells. Each category of geothermal technology has its own set of interconnection issues, and these are examined separately for each. The report draws conclusions about each technology's market affinities as defined by factors related to transmission and distribution infrastructure. It finishes with an assessment of selected markets with known geothermal potential, identifying those that offer the best prospects for near-term commercial development and for demonstration projects.

  20. Reconnaissance of the hydrothermal resources of Utah

    SciTech Connect (OSTI)

    Rush, F.E.

    1983-01-01

    Geologic factors in the Basin and Range province in Utah are more favorable for the occurrence of geothermal resources than in other areas on the Colorado Plateaus or in the Middle Rocky Mountains. These geologic factors are principally crustal extension and crustal thinning during the last 17 million years. Basalts as young as 10,000 years have been mapped in the area. High-silica volcanic and intrusive rocks of Quaternary age can be used to locate hydrothermal convection systems. Drilling for hot, high-silica, buried rock bodies is most promising in the areas of recent volcanic activity. Southwestern Utah has more geothermal potential than other parts of the Basin and Range province in Utah. The Roosevelt Hot Springs area, the Cove Fort-Sulphurdale area, and the area to the north as far as 60 kilometers from them probably have the best potential for geothermal development for generation of electricity. Other areas with estimated reservoir temperatures greater than 150/sup 0/C are Thermo, Monroe, Red Hill (in the Monroe-Joseph Known Geothermal Resource Area), Joseph Hot Springs, and the Newcastle area. The rates of heat and water discharge are high at Crater, Meadow, and Hatton Hot Springs, but estimated reservoir temperatures there are less than 150/sup 0/C. Additional exploration is needed to define the potential in three additional areas in the Escalante Desert. 28 figs., 18 tabs.

  1. Stanford Geothermal Workshop - Geothermal Technologies Office...

    Broader source: Energy.gov (indexed) [DOE]

    by Geothermal Technologies Director Doug Hollett at the Stanford Geothermal Workshop on February 11-13, 2013. stanford2013hollett.pdf More Documents & Publications Geothermal...

  2. Stanford Geothermal Workshop - Geothermal Technologies Office...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Geothermal Technologies Program Annual Peer Review Presentation By Doug Hollett Iceland Geothermal Conference 2013 - Geothermal Policies and Impacts in the U.S. Fiscal Year...

  3. Selected data for low-temperature (less than 90{sup 0}C) geothermal systems in the United States: reference data for US Geological Survey Circular 892

    SciTech Connect (OSTI)

    Reed, M.J.; Mariner, R.H.; Brook, C.A.; Sorey, M.L.

    1983-12-15

    Supporting data are presented for the 1982 low-temperature geothermal resource assessment of the United States. Data are presented for 2072 geothermal sites which are representative of 1168 low-temperature geothermal systems identified in 26 States. The low-temperature geothermal systems consist of 978 isolated hydrothermal-convection systems, 148 delineated-area hydrothermal-convection systems, and 42 delineated-area conduction-dominated systems. The basic data and estimates of reservoir conditions are presented for each geothermal system, and energy estimates are given for the accessible resource base, resource, and beneficial heat for each isolated system.

  4. Instabilities during liquid migration into superheated hydrothermal systems

    SciTech Connect (OSTI)

    Fitzgerald, Shaun D.; Woods, Andrew W.

    1995-01-26

    Hydrothermal systems typically consist of hot permeable rock which contains either liquid or liquid and saturated steam within the voids. These systems vent fluids at the surface through hot springs, fumaroles, mud pools, steaming ground and geysers. They are simultaneously recharged as meteoric water percolates through the surrounding rock or through the active injection of water at various geothermal reservoirs. In a number of geothermal reservoirs from which significant amounts of hot fluid have been extracted and passed through turbines, superheated regions of vapor have developed. As liquid migrates through a superheated region of a hydrothermal system, some of the liquid vaporizes at a migrating liquid-vapor interface. Using simple physical arguments, and analogue laboratory experiments we show that, under the influence of gravity, the liquid-vapor interface may become unstable and break up into fingers.

  5. Enhanced Geothermal Systems (EGS) R&D Program: US Geothermal Resources Review and Needs Assessment

    SciTech Connect (OSTI)

    Entingh, Dan; McLarty, Lynn

    2000-11-30

    The purpose of this report is to lay the groundwork for an emerging process to assess U.S. geothermal resources that might be suitable for development as Enhanced Geothermal Systems (EGS). Interviews of leading geothermists indicate that doing that will be intertwined with updating assessments of U.S. higher-quality hydrothermal resources and reviewing methods for discovering ''hidden'' hydrothermal and EGS resources. The report reviews the history and status of assessment of high-temperature geothermal resources in the United States. Hydrothermal, Enhanced, and Hot Dry Rock resources are addressed. Geopressured geothermal resources are not. There are three main uses of geothermal resource assessments: (1) They inform industry and other interest parties of reasonable estimates of the amounts and likely locations of known and prospective geothermal resources. This provides a basis for private-sector decisions whether or not to enter the geothermal energy business at all, and for where to look for useful resources. (2) They inform government agencies (Federal, State, local) of the same kinds of information. This can inform strategic decisions, such as whether to continue to invest in creating and stimulating a geothermal industry--e.g., through research or financial incentives. And it informs certain agencies, e.g., Department of Interior, about what kinds of tactical operations might be required to support such activities as exploration and leasing. (3) They help the experts who are performing the assessment(s) to clarify their procedures and data, and in turn, provide the other two kinds of users with a more accurate interpretation of what the resulting estimates mean. The process of conducting this assessment brings a spotlight to bear on what has been accomplished in the domain of detecting and understanding reservoirs, in the period since the last major assessment was conducted.

  6. Geothermal Brief: Market and Policy Impacts Update

    SciTech Connect (OSTI)

    Speer, B.

    2012-10-01

    Utility-scale geothermal electricity generation plants have generally taken advantage of various government initiatives designed to stimulate private investment. This report investigates these initiatives to evaluate their impact on the associated cost of energy and the development of geothermal electric generating capacity using conventional hydrothermal technologies. We use the Cost of Renewable Energy Spreadsheet Tool (CREST) to analyze the effects of tax incentives on project economics. Incentives include the production tax credit, U.S. Department of Treasury cash grant, the investment tax credit, and accelerated depreciation schedules. The second half of the report discusses the impact of the U.S. Department of Energy's (DOE) Loan Guarantee Program on geothermal electric project deployment and possible reasons for a lack of guarantees for geothermal projects. For comparison, we examine the effectiveness of the 1970s DOE drilling support programs, including the original loan guarantee and industry-coupled cost share programs.

  7. A Roadmap for Strategic Development of Geothermal Exploration Technologies

    SciTech Connect (OSTI)

    Phillips, Benjamin R.; Ziagos, John; Thorsteinsson, Hildigunnur; Hass, Eric

    2013-02-13

    Characterizing productive geothermal systems is challenging yet critical to identify and develop an estimated 30 gigawatts electric (GWe) of undiscovered hydrothermal resources in the western U.S. This paper, undertaken by the U.S. Department of Energy’s Geothermal Technologies Office (GTO), summarizes needs and technical pathways that target the key geothermal signatures of temperature, permeability, and fluid content, and develops the time evolution of these pathways, tying in past and current GTO exploration Research and Development (R&D) projects. Beginning on a five-year timescale and projecting out to 2030, the paper assesses technologies that could accelerate the confirmation of 30 GWe. The resulting structure forms the basis for a Geothermal Exploration Technologies Roadmap, a strategic development plan to help guide GTO R&D investments that will lower the risk and cost of geothermal prospect identification. This roadmap is currently open for public comment. Send your comments to geothermal@ee.doe.gov.

  8. Hydrothermal vents of Yellowstone Lake, Yellowstone National Park, Wyoming

    SciTech Connect (OSTI)

    Kaplinski, M.A.; Morgan, P. (Northern Arizona Univ., Flagstaff, AZ (United States). Geology Dept.)

    1993-04-01

    Hydrothermal vent systems within Yellowstone Lake are located within the Yellowstone caldera in the northeastern and West Thumb sections of the lake. The vent systems lie within areas of extremely high geothermal gradients (< 1,000 C/km) in the lake sediments and occur as clusters of individual vents that expel both hydrothermal fluids and gas. Regions surrounding the vents are colonized by unique, chemotropic biologic communities and suggest that hydrothermal input plays an important role in the nutrient dynamics of the lake's ecosystem. The main concentration of hydrothermal activity occurs in the northeast region of the main lake body in a number of locations including: (1) along the shoreline from the southern edge of Sedge Bay to the inlet of Pelican Creek; (2) the central portion of the partially submerged Mary Bay phreatic explosion crater, within deep (30--50 m) fissures; (3) along the top of a 3 km long, steep-sided ridge that extends from the southern border of Mary Bay, south-southeast into the main lake basin; and (4) east of Stevenson Island along the lower portion of the slope (50--107 m) into the lake basin, within an anastomosing series of north to northwest trending, narrow troughs or fissures. Hydrothermal vents were also located within, and surrounding the West Thumb of Yellowstone Lake, with the main concentration occurring the offshore of the West Thumb and Potts Geyser Basin. Hydrothermal vents in Yellowstone Lake occur along fractures that have penetrated the lake sediments or along the tops of ridges and near shore areas. Underneath the lake, rising hydrothermal fluids encounter a semi-permeable cap of lake sediments. Upwardly convecting hydrothermal fluid flow may be diverted by the impermeable lake sediments along the buried, pre-existing topography. These fluids may continue to rise along topography until fractures are encountered, or the lake sediment cover is thinned sufficiently to allow egress of the fluids.

  9. Geothermal Basics

    Broader source: Energy.gov [DOE]

    Geothermal energy is thermal energy generated and stored in the Earth. Geothermal energy can manifest on the surface of the Earth, or near the surface of the Earth, where humankind may harness it to serve our energy needs. Geothermal resources are reservoirs of hot water that exist at varying temperatures and depths below the Earth's surface. Wells can be drilled into these underground reservoirs to tap steam and very hot water that can be brought to the surface for a variety of uses.

  10. Geothermal energy

    SciTech Connect (OSTI)

    Renner, J.L. [Idaho National Engineering Laboratory, Idaho Fall, ID (United States); Reed, M.J. [Dept. of Energy, Washington, DC (United States)

    1993-12-31

    Use of geothermal energy (heat from the earth) has a small impact on the environmental relative to other energy sources; avoiding the problems of acid rain and greenhouse emissions. Geothermal resources have been utilized for centuries. US electrical generation began at The Geysers, California in 1960 and is now about 2300 MW. The direct use of geothermal heat for industrial processes and space conditioning in the US is about 1700 MW of thermal energy. Electrical production occurs in the western US and direct uses are found throughout the US. Typical geothermal power plants produce less than 5% of the CO{sub 2} released by fossil plants. Geothermal plants can now be configured so that no gaseous emissions are released. Sulfurous gases are effectively removed by existing scrubber technology. Potentially hazardous elements produced in geothermal brines are injected back into the producing reservoir. Land use for geothermal wells, pipelines, and power plants is small compared to land use for other extractive energy sources like oil, gas, coal, and nuclear. Per megawatt produced, geothermal uses less than one eighth the land that is used by a typical coal mine and power plant system. Geothermal development sites often co-exist with agricultural land uses like crop production or grazing.

  11. Geothermal Energy

    SciTech Connect (OSTI)

    Steele, B.C.; Pichiarella, L.S. [eds.; Kane, L.S.; Henline, D.M.

    1995-01-01

    Geothermal Energy (GET) announces on a bimonthly basis the current worldwide information available on the technologies required for economic recovery of geothermal energy and its use as direct heat or for electric power production. This publication contains the abstracts of DOE reports, journal articles, conference papers, patents, theses, and monographs added to the Energy Science and Technology Database during the past two months.

  12. Hot Dry Rock; Geothermal Energy

    SciTech Connect (OSTI)

    1990-01-01

    The commercial utilization of geothermal energy forms the basis of the largest renewable energy industry in the world. More than 5000 Mw of electrical power are currently in production from approximately 210 plants and 10 000 Mw thermal are used in direct use processes. The majority of these systems are located in the well defined geothermal generally associated with crustal plate boundaries or hot spots. The essential requirements of high subsurface temperature with huge volumes of exploitable fluids, coupled to environmental and market factors, limit the choice of suitable sites significantly. The Hot Dry Rock (HDR) concept at any depth originally offered a dream of unlimited expansion for the geothermal industry by relaxing the location constraints by drilling deep enough to reach adequate temperatures. Now, after 20 years intensive work by international teams and expenditures of more than $250 million, it is vital to review the position of HDR in relation to the established geothermal industry. The HDR resource is merely a body of rock at elevated temperatures with insufficient fluids in place to enable the heat to be extracted without the need for injection wells. All of the major field experiments in HDR have shown that the natural fracture systems form the heat transfer surfaces and that it is these fractures that must be for geothermal systems producing from naturally fractured formations provide a basis for directing the forthcoming but, equally, they require accepting significant location constraints on HDR for the time being. This paper presents a model HDR system designed for commercial operations in the UK and uses production data from hydrothermal systems in Japan and the USA to demonstrate the reservoir performance requirements for viable operations. It is shown that these characteristics are not likely to be achieved in host rocks without stimulation processes. However, the long term goal of artificial geothermal systems developed by systematic engineering procedures at depth may still be attained if high temperature sites with extensive fracturing are developed or exploited. [DJE -2005

  13. 2014 Annual Report, Geothermal Technologies Office

    SciTech Connect (OSTI)

    none,

    2015-03-01

    In 2014, the Geothermal Technologies Office (GTO) made significant gains—increased budgets, new projects, key technology successes, and new staff. The Fiscal Year (FY) 2015 budget is at $55 million—roughly a 20% increase over FY 2014, and a strong vote of confidence in what the sector is doing to advance economically competitive renewable energy. GTO also remains committed to a balanced portfolio, which includes new hydrothermal development, EGS, and targeted opportunities in the low-temperature sector.

  14. Environmental impacts during geothermal development: Some examples from Central America

    SciTech Connect (OSTI)

    Goff, S.; Goff, F.

    1997-04-01

    The impacts of geothermal development projects are usually positive. However, without appropriate monitoring plans and mitigation actions firmly incorporated into the project planning process, there exists the potential for significant negative environmental impacts. The authors present five examples from Central America of environmental impacts associated with geothermal development activities. These brief case studies describe landslide hazards, waste brine disposal, hydrothermal explosions, and air quality issues. Improved Environmental Impact Assessments are needed to assist the developing nations of the region to judiciously address the environmental consequences associated with geothermal development.

  15. Analysis of Low-Temperature Utilization of Geothermal Resources

    SciTech Connect (OSTI)

    Anderson, Brian

    2015-06-30

    Full realization of the potential of what might be considered “low-grade” geothermal resources will require that we examine many more uses for the heat than traditional electricity generation. To demonstrate that geothermal energy truly has the potential to be a national energy source we will be designing, assessing, and evaluating innovative uses for geothermal-produced water such as hybrid biomass-geothermal cogeneration of electricity and district heating and efficiency improvements to the use of cellulosic biomass in addition to utilization of geothermal in district heating for community redevelopment projects. The objectives of this project were: 1) to perform a techno-economic analysis of the integration and utilization potential of low-temperature geothermal sources. Innovative uses of low-enthalpy geothermal water were designed and examined for their ability to offset fossil fuels and decrease CO2 emissions. 2) To perform process optimizations and economic analyses of processes that can utilize low-temperature geothermal fluids. These processes included electricity generation using biomass and district heating systems. 3) To scale up and generalize the results of three case study locations to develop a regionalized model of the utilization of low-temperature geothermal resources. A national-level, GIS-based, low-temperature geothermal resource supply model was developed and used to develop a series of national supply curves. We performed an in-depth analysis of the low-temperature geothermal resources that dominate the eastern half of the United States. The final products of this study include 17 publications, an updated version of the cost estimation software GEOPHIRES, and direct-use supply curves for low-temperature utilization of geothermal resources. The supply curves for direct use geothermal include utilization from known hydrothermal, undiscovered hydrothermal, and near-hydrothermal EGS resources and presented these results at the Stanford Geothermal Workshop. We also have incorporated our wellbore model into TOUGH2-EGS and began coding TOUGH2-EGS with the wellbore model into GEOPHIRES as a reservoir thermal drawdown option. Additionally, case studies for the WVU and Cornell campuses were performed to assess the potential for district heating and cooling at these two eastern U.S. sites.

  16. Identification of chemoautotrophic microorganisms from a diffuse flow hydrothermal vent at EPR 9° north using ¹³C DNA stable isotope probing and catalyzed activated reporter deposition-fluorescence in situ hybridization

    E-Print Network [OSTI]

    Richberg, Kevin Patrick

    2010-01-01

    At deep-sea hydrothermal vents chemolithoautotrophic microbes mediate the transfer of geothermal chemical energy to higher trophic levels. To better understand these underlying processes and the organisms catalyzing them, ...

  17. Heat Flow, Heat Transfer And Lithosphere Rheology In Geothermal...

    Open Energy Info (EERE)

    Heat Flow, Heat Transfer And Lithosphere Rheology In Geothermal Areas- Features And Examples Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article:...

  18. National Geothermal Summit

    Broader source: Energy.gov [DOE]

    The Geothermal Energy Association hosts its annual National Geothermal Summit in Reno, Nevada, June 3-4, 2015.

  19. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Stone, Et Al., 1977) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  20. Geothermal Literature Review At Roosevelt Hot Springs Geothermal...

    Open Energy Info (EERE)

    Geothermal Literature Review At Roosevelt Hot Springs Geothermal Area (Faulder, 1991) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  1. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Dahal, Et Al., 2012) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  2. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Elston, Et Al., 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  3. Geothermal Literature Review At Roosevelt Hot Springs Geothermal...

    Open Energy Info (EERE)

    Geothermal Literature Review At Roosevelt Hot Springs Geothermal Area (Petersen, 1975) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  4. National Geothermal Data System - DOE Geothermal Data Repository...

    Energy Savers [EERE]

    - DOE Geothermal Data Repository Presentation National Geothermal Data System - DOE Geothermal Data Repository Presentation Overview of the National Geothermal Data System (NGDS)...

  5. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Clemons, Et Al., 1988) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  6. track 3: enhanced geothermal systems (EGS) | geothermal 2015...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    3: enhanced geothermal systems (EGS) | geothermal 2015 peer review track 3: enhanced geothermal systems (EGS) | geothermal 2015 peer review EGS technologies utilize directional...

  7. Geothermal Data Systems

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) Geothermal Technologies Office (GTO) has designed and tested a comprehensive, federated information system that will make geothermal data widely available. This new National Geothermal Data System (NGDS) will provide access to all types of geothermal data to enable geothermal analysis and widespread public use, thereby reducing the risk of geothermal energy development.

  8. Iceland Geothermal Conference 2013 - Geothermal Policies and...

    Broader source: Energy.gov (indexed) [DOE]

    Iceland Geothermal Conference presentation on March 7, 2013 by Chief Engineer Jay Nathwani of the U.S. Department of Energys Geothermal Technologies Office. icelandgeothermalco...

  9. SMU Geothermal Conference 2011 - Geothermal Technologies Program...

    Broader source: Energy.gov (indexed) [DOE]

    DOE Geothermal Technologies Program presentation at the SMU Geothermal Conference in June 2011. gtpsmuconferencereinhardt2011.pdf More Documents & Publications Low Temperature...

  10. Geothermal Energy Association Recognizes the National Geothermal...

    Broader source: Energy.gov (indexed) [DOE]

    Development and Demonstration Projects for up to 78 Million to Promote Enhanced Geothermal Systems Geothermal energy, traditionally a baseload power source among renewables,...

  11. Federal Geothermal Research Program Update Fiscal Year 2000

    SciTech Connect (OSTI)

    Renner, J.L.

    2001-08-15

    The Department of Energy's Geothermal Program serves two broad purposes: (1) to assist industry in overcoming near-term barriers by conducting cost-shared research and field verification that allows geothermal energy to compete in today's aggressive energy markets; and (2) to undertake fundamental research with potentially large economic payoffs. The four categories of work used to distinguish the research activities of the Geothermal Program during FY 2000 reflect the main components of real-world geothermal projects. These categories form the main sections of the project descriptions in this Research Update. Exploration Technology research focuses on developing instruments and techniques to discover hidden hydrothermal systems and to explore the deep portions of known systems. Research in geophysical and geochemical methods is expected to yield increased knowledge of hidden geothermal systems. Reservoir Technology research combines laboratory and analytical investigations with equipment development and field testing to establish practical tools for resource development and management for both hydrothermal reservoirs and enhanced geothermal systems. Research in various reservoir analysis techniques is generating a wide range of information that facilitates development of improved reservoir management tools. Drilling Technology focuses on developing improved, economic drilling and completion technology for geothermal wells. Ongoing research to avert lost circulation episodes in geothermal drilling is yielding positive results. Conversion Technology research focuses on reducing costs and improving binary conversion cycle efficiency, to permit greater use of the more abundant moderate-temperature geothermal resource, and on the development of materials that will improve the operating characteristics of many types of geothermal energy equipment. Increased output and improved performance of binary cycles will result from investigations in heat cycle research.

  12. Geothermal Power and Interconnection: The Economics of Getting to Market

    SciTech Connect (OSTI)

    Hurlbut, David

    2012-04-23

    This report provides a baseline description of the transmission issues affecting geothermal technologies. It is intended for geothermal experts in either the private or public sector who are less familiar with how the electricity system operates beyond the geothermal plant. The report begins with a comprehensive overview of the grid, how it is planned, how it is used, and how it is paid for. The report then overlays onto this "big picture" three types of geothermal technologies: conventional hydrothermal systems; emerging technologies such as enhanced engineered geothermal systems (EGS) and geopressured geothermal; and geothermal co-production with existing oil and gas wells. Each category of geothermal technology has its own set of interconnection issues, and these are examined separately for each. The report draws conclusions about each technology’s market affinities as defined by factors related to transmission and distribution infrastructure. It finishes with an assessment of selected markets with known geothermal potential, identifying those that offer the best prospects for near-term commercial development and for demonstration projects.

  13. Geothermal Technologies Program Overview Presentation at Stanford...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Overview Presentation at Stanford Geothermal Workshop Geothermal Technologies Program Overview Presentation at Stanford Geothermal Workshop General overview of Geothermal...

  14. Sandia Energy - Geothermal Energy & Drilling Technology

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Geothermal Energy & Drilling Technology Home Stationary Power Energy Conversion Efficiency Geothermal Geothermal Energy & Drilling Technology Geothermal Energy & Drilling...

  15. Session: Geopressured-Geothermal

    SciTech Connect (OSTI)

    Jelacic, Allan J.; Eaton, Ben A.; Shook, G. Michael; Birkinshaw, Kelly; Negus-de Wys, Jane

    1992-01-01

    This session at the Geothermal Energy Program Review X: Geothermal Energy and the Utility Market consisted of five presentations: ''Overview of Geopressured-Geothermal'' by Allan J. Jelacic; ''Geothermal Well Operations and Automation in a Competitive Market'' by Ben A. Eaton; ''Reservoir Modeling and Prediction at Pleasant Bayou Geopressured-Geothermal Reservoir'' by G. Michael Shook; ''Survey of California Geopressured-Geothermal'' by Kelly Birkinshaw; and ''Technology Transfer, Reaching the Market for Geopressured-Geothermal Resources'' by Jane Negus-de Wys.

  16. Enhanced Geothermal Systems Demonstration Projects

    SciTech Connect (OSTI)

    Geothermal Technologies Office

    2013-08-06

    Several Enhanced Geothermal Systems (EGS) demonstration projects are highlighted on this Geothermal Technologies Office Web page.

  17. Geothermal Program Review VII: proceedings. DOE Research and Development for the Geothermal Marketplace

    SciTech Connect (OSTI)

    Not Available

    1989-01-01

    Each year the Geothermal Technology Division of the US Department of Energy conducts an indepth review of its entire geothermal R and D program. The 2--3 day conference serves several purposes: a status report on current R and D activities, an assessment of progress and problems, a review of management issues, and a technology transfer opportunity between DOE and the US geothermal industry. This year's conference, Program Review 7, was held in San Francisco on March 21--23, 1989. As indicated by its title, ''DOE Research and Development for the Geothermal Marketplace'', Program Review 7 emphasized developing technologies, concepts, and innovations having potential for commercial application in the foreseeable future. Program Review 7 was comprised of eight sessions including an opening session and a special presentation on the ''Role of Geothermal Energy in Minimizing Global Environmental Problems.'' The five technical sessions covered GTD-sponsored R and D in the areas of hydrothermal (two sessions), hot dry rock, geopressured, and magma. Presentations were made by the relevant field researchers, and sessions were chaired by the appropriate DOE Operations Office Geothermal Program Manager. The technical papers and commentary of invited speakers contained in these Proceedings have been compiled in the order in which they were presented at Program Review 7.

  18. Indiana/Geothermal | Open Energy Information

    Open Energy Info (EERE)

    No geothermal projects listed. Add a geothermal project. Operational Geothermal Power Plants in Indiana No geothermal power plants listed. Add a geothermal energy generation...

  19. National Geothermal Summit

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Geothermal Energy Association (GEA) will be holding it’s fifth annual National Geothermal Summit on June 3-4 at the Grand Sierra Resort and Casino in Reno, NV. The National Geothermal Summit is...

  20. Geothermal tomorrow 2008

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    Contributors from the Geothermal Technologies Program and the geothermal community highlight the current status and activities of the Program and the development of the global resource of geothermal energy.

  1. Whole Algae Hydrothermal Liquefaction Technology Pathway | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    order for the hydrothermal liquefaction of microalgae to be competitive with petroleum-derived gasoline-, diesel-, and jet-range hydrocarbon blendstocks. Whole Algae Hydrothermal...

  2. Water-related constraints to the development of geothermal electric generating stations

    SciTech Connect (OSTI)

    Robertson, R.C.; Shepherd, A.D.; Rosemarin, C.S.; Mayfield, M.W.

    1981-06-01

    The water-related constraints, which may be among the most complex and variable of the issues facing commercialization of geothermal energy, are discussed under three headings: (1) water requirements of geothermal power stations, (2) resource characteristics of the most promising hydrothermal areas and regional and local water supply situations, and (3) legal issues confronting potential users of water at geothermal power plants in the states in which the resource areas are located. A total of 25 geothermal resource areas in California, New Mexico, Oregon, Idaho, Utah, Hawaii, and Alaska were studied. Each had a hydrothermal resource temperature in excess of 150/sup 0/C (300/sup 0/F) and an estimated 30-year potential of greater than 100-MW(e) capacity.

  3. Geothermal probabilistic cost study

    SciTech Connect (OSTI)

    Orren, L.H.; Ziman, G.M.; Jones, S.C.; Lee, T.K.; Noll, R.; Wilde, L.; Sadanand, V.

    1981-08-01

    A tool is presented to quantify the risks of geothermal projects, the Geothermal Probabilistic Cost Model (GPCM). The GPCM model is used to evaluate a geothermal reservoir for a binary-cycle electric plant at Heber, California. Three institutional aspects of the geothermal risk which can shift the risk among different agents are analyzed. The leasing of geothermal land, contracting between the producer and the user of the geothermal heat, and insurance against faulty performance are examined. (MHR)

  4. Geothermal Exploration of Newberry Volcano, Oregon

    SciTech Connect (OSTI)

    Waibel, Albert F.; Frone, Zachary S.; Blackwell, David D.

    2014-12-01

    Davenport Newberry (Davenport) has completed 8 years of exploration for geothermal energy on Newberry Volcano in central Oregon. Two deep exploration test wells were drilled by Davenport on the west flank of the volcano, one intersected a hydrothermal system; the other intersected isolated fractures with no hydrothermal interconnection. Both holes have bottom-hole temperatures near or above 315°C (600°F). Subsequent to deep test drilling an expanded exploration and evaluation program was initiated. These efforts have included reprocessing existing data, executing multiple geological, geophysical, geochemical programs, deep exploration test well drilling and shallow well drilling. The efforts over the last three years have been made possible through a DOE Innovative Exploration Technology (IET) Grant 109, designed to facilitate innovative geothermal exploration techniques. The combined results of the last 8 years have led to a better understanding of the history and complexity of Newberry Volcano and improved the design and interpretation of geophysical exploration techniques with regard to blind geothermal resources in volcanic terrain.

  5. Hydrothermal Liquefaction of Biomass

    SciTech Connect (OSTI)

    Elliott, Douglas C.

    2010-12-10

    Hydrothermal liquefaction technology is describes in its relationship to fast pyrolysis of biomass. The scope of work at PNNL is discussed and some intial results are presented. HydroThermal Liquefaction (HTL), called high-pressure liquefaction in earlier years, is an alternative process for conversion of biomass into liquid products. Some experts consider it to be pyrolysis in solvent phase. It is typically performed at about 350 C and 200 atm pressure such that the water carrier for biomass slurry is maintained in a liquid phase, i.e. below super-critical conditions. In some applications catalysts and/or reducing gases have been added to the system with the expectation of producing higher yields of higher quality products. Slurry agents ('carriers') evaluated have included water, various hydrocarbon oils and recycled bio-oil. High-pressure pumping of biomass slurry has been a major limitation in the process development. Process research in this field faded away in the 1990s except for the HydroThermal Upgrading (HTU) effort in the Netherlands, but has new resurgence with other renewable fuels in light of the increased oil prices and climate change concerns. Research restarted at Pacific Northwest National Laboratory (PNNL) in 2007 with a project, 'HydroThermal Liquefaction of Agricultural and Biorefinery Residues' with partners Archer-Daniels-Midland Company and ConocoPhillips. Through bench-scale experimentation in a continuous-flow system this project investigated the bio-oil yield and quality that could be achieved from a range of biomass feedstocks and derivatives. The project was completed earlier this year with the issuance of the final report. HydroThermal Liquefaction research continues within the National Advanced Biofuels Consortium with the effort focused at PNNL. The bench-scale reactor is being used for conversion of lignocellulosic biomass including pine forest residue and corn stover. A complementary project is an international collaboration with Canada to investigate kelp (seaweed) as a biomass feedstock. The collaborative project includes process testing of the kelp in HydroThermal Liquefaction in the bench-scale unit at PNNL. HydroThermal Liquefaction at PNNL is performed in the hydrothermal processing bench-scale reactor system. Slurries of biomass are prepared in the laboratory from whole ground biomass materials. Both wet processing and dry processing mills can be used, but the wet milling to final slurry is accomplished in a stirred ball mill filled with angle-cut stainless steel shot. The PNNL HTL system, as shown in the figure, is a continuous-flow system including a 1-litre stirred tank preheater/reactor, which can be connected to a 1-litre tubular reactor. The product is filtered at high-pressure to remove mineral precipitate before it is collected in the two high-pressure collectors, which allow the liquid products to be collected batchwise and recovered alternately from the process flow. The filter can be intermittently back-flushed as needed during the run to maintain operation. By-product gas is vented out the wet test meter for volume measurement and samples are collected for gas chromatography compositional analysis. The bio-oil product is analyzed for elemental content in order to calculate mass and elemental balances around the experiments. Detailed chemical analysis is performed by gas chromatography-mass spectrometry and 13-C nuclear magnetic resonance is used to evaluate functional group types in the bio-oil. Sufficient product is produced to allow subsequent catalytic hydroprocessing to produce liquid hydrocarbon fuels. The product bio-oil from hydrothermal liquefaction is typically a more viscous product compared to fast pyrolysis bio-oil. There are several reasons for this difference. The HTL bio-oil contains a lower level of oxygen because of more extensive secondary reaction of the pyrolysis products. There are less amounts of the many light oxygenates derived from the carbohydrate structures as they have been further reacted to phenolic Aldol condensation products. The bio-oil

  6. Ecological and Geochemical Aspects of Terrestrial Hydrothermal Systems

    E-Print Network [OSTI]

    Forrest, Matthew James

    exploitation of nearby geothermal energy resources. Dixieexploitation of nearby geothermal energy resources. In Napachange (USFWS, 2009), geothermal energy development (BLM,

  7. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    At Lightning Dock Geothermal Area (Witcher, Et Al., 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At...

  8. National Geothermal Data System (NGDS) Geothermal Data Domain...

    Open Energy Info (EERE)

    National Geothermal Data System (NGDS) Geothermal Data Domain: Assessment of Geothermal Community Data Needs Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  9. Geothermal Literature Review At Long Valley Caldera Geothermal...

    Open Energy Info (EERE)

    Geothermal Literature Review At Long Valley Caldera Geothermal Area (Goldstein & Flexser, 1984) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

  10. Geothermal corehole drilling and operations, Platanares, Honduras, Central America

    SciTech Connect (OSTI)

    Goff, S.; Rufenacht, H.D.; Laughlin, A.W.; Adams, A.; Planner, H.; Ramos, N.

    1987-01-01

    Two slim exploration coreholes to depths of 650 m and 428 m, respectively, have been completed at the Platanares geothermal site, Honduras, Central America. A third corehole is now being drilled. These boreholes have provided information on the stratigraphy, temperature variation with depth, nature and compositions of fluids, fracturing, permeability, and hydrothermal alterations associated with the geothermal reservoir. Eruptions of hot water occurred during the drilling of both the first and third boreholes. Recovery of >98% core has been obtained even under difficult superheated conditions.

  11. Geothermal Tomorrow

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12,Executive CompensationEnergy GeothermalDemonstration2008

  12. Geothermal Today: 2005 Geothermal Technologies Program Highlights

    SciTech Connect (OSTI)

    Not Available

    2005-09-01

    This DOE/EERE Geothermal Technologies Program publication highlights accomplishments and activities of the program during the last two years.

  13. GEOTHERMAL SUBSIDENCE RESEARCH PROGRAM PLAN

    E-Print Network [OSTI]

    Lippmann, Marcello J.

    2010-01-01

    the division of Geothermal Energy. TASK 1 Identify Areas forLaboratory, NSF Geothermal Energy Conference, Pasadena,associated with geothermal energy development. These g o a l

  14. GEOTHERMAL SUBSIDENCE RESEARCH PROGRAM PLAN

    E-Print Network [OSTI]

    Lippmann, Marcello J.

    2010-01-01

    of Subsiding Areas and Geothermal Subsidence Potential25 Project 2-Geothermal Subsidence Potential Maps . . . . .Subsidence Caused by a Geothermal Project and Subsidence Due

  15. GEOTHERMAL SUBSIDENCE RESEARCH PROGRAM PLAN

    E-Print Network [OSTI]

    Lippmann, Marcello J.

    2010-01-01

    Liquid Dominated Geothermal Systems," Second Intern. Symp.behavior related to geothermal systems and their potentialsetting of most geothermal systems is such that natural

  16. Video Resources on Geothermal Technologies

    Broader source: Energy.gov [DOE]

    Geothermal video offerings at the Department of Energy include simple interactive illustrations of geothermal power technologies and interviews on initiatives in the Geothermal Technologies Office.

  17. Interagency Geothermal Coordinating Council fifth annual report. Final draft

    SciTech Connect (OSTI)

    Abel, Fred H.

    1981-07-07

    Geothermal energy is the natural heat of the earth, and can be tapped as a clean, safe, economical alternative source of energy. Much of the geothermal energy resource is recoverable with current or near-current technology and could make a significant contribution both to increasing domestic energy supplies and to reducing the US dependence on imported oil. Geothermal energy can be used for electric power production, residential and commercial space heating and cooling, industrial process heat, and agricultural process applications. This report describes the progress for fiscal year 1980 (FY80) of the Federal Geothermal Program. It also summarizes the goals, strategy, and plans which form the basis for the FY81 and FY82 program activities and reflects the recent change in national policy affecting Federal research, development and demonstration programs. The Interagency Geothermal Coordinating Council (IGCC) believes that substantial progress can and will be made in the development of geothermal energy. The IGCC goals are: (1) reduce the institutional barriers so that geothermal projects can be on-line in one-half the current time; (2) make moderate temperature resources an economically competitive source of electricity; (3) remove the backlog of noncompetitive lease applications; (4) competitive lease all KGRA lands; and (5) cut the cost of hydrothermal technology by 25%.

  18. Geothermal Tomorrow 2008

    SciTech Connect (OSTI)

    Not Available

    2008-09-01

    Brochure describing the recent activities and future research direction of the DOE Geothermal Program.

  19. Benefit-cost analysis of DOE's Current Federal Program to increase hydrothermal resource utilization. Final report

    SciTech Connect (OSTI)

    Not Available

    1981-12-10

    The impact of DOE's Current Federal Program on the commercialization of hydrothermal resources between 1980 and 2000 is analyzed. The hydrothermal resources of the United States and the types of DOE activities used to stimulate the development of these resources for both electric power and direct heat use are described briefly. The No Federal Program and the Current Federal Program are then described in terms of funding levels and the resultant market penetration estimates through 2000. These market penetration estimates are also compared to other geothermal utilization forecasts. The direct benefits of the Current Federal Program are next presented for electric power and direct heat use applications. An analysis of the external impacts associated with the additional hydrothermal resource development resulting from the Current Federal Program is also provided. Included are environmental effects, national security/balance-of-payments improvements, socioeconomic impacts and materials requirements. A summary of the analysis integrating the direct benefits, external impacts and DOE program costs concludes the report.

  20. Development of a Hydrothermal Spallation Drilling System for EGS Geothermal

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, Alabama (UtilityInstrumentsArea (DOE GTP) Jump to: navigation,SystemMEQ in EGSProject |

  1. Property:PotentialGeothermalHydrothermalCapacity | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History ViewMayo,AltFuelVehicle2FlatDemandMonth3 Jump to:PotentialCSPCapacity

  2. Property:PotentialGeothermalHydrothermalGeneration | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History ViewMayo,AltFuelVehicle2FlatDemandMonth3 Jump to:PotentialCSPCapacityInformation

  3. GEOLOGY AND HYDROTHERMAL ALTERATION OF THE RAFT RIVER GEOTHERMAL SYSTEM,

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePowerEdistoWhiskeyFootprint VenturesColorado:Georgia:FutureG2FOR EGSIDAHO |

  4. Hydrothermal Exploration Best Practices and Geothermal Knowledge Exchange

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History View NewGuam:on Openei | Open Energy Information Exploration Best

  5. Geothermal Economics Calculator (GEC) - additional modifications to final report as per GTP's request.

    SciTech Connect (OSTI)

    Gowda, Varun; Hogue, Michael

    2015-07-17

    This report will discuss the methods and the results from economic impact analysis applied to the development of Enhanced Geothermal Systems (EGS), conventional hydrothermal, low temperature geothermal and coproduced fluid technologies resulting in electric power production. As part of this work, the Energy & Geoscience Institute (EGI) has developed a web-based Geothermal Economics Calculator (Geothermal Economics Calculator (GEC)) tool that is aimed at helping the industry perform geothermal systems analysis and study the associated impacts of specific geothermal investments or technological improvements on employment, energy and environment. It is well-known in the industry that geothermal power projects will generate positive economic impacts for their host regions. Our aim in the assessment of these impacts includes quantification of the increase in overall economic output due to geothermal projects and of the job creation associated with this increase. Such an estimate of economic impacts of geothermal investments on employment, energy and the environment will also help us understand the contributions that the geothermal industry will have in achieving a sustainable path towards energy production.

  6. Enhanced Geothermal Systems (EGS) R&D Program: Monitoring EGS-Related Research

    SciTech Connect (OSTI)

    McLarty, Lynn; Entingh, Daniel; Carwile, Clifton

    2000-09-29

    This report reviews technologies that could be applicable to Enhanced Geothermal Systems development. EGS covers the spectrum of geothermal resources from hydrothermal to hot dry rock. We monitored recent and ongoing research, as reported in the technical literature, that would be useful in expanding current and future geothermal fields. The literature review was supplemented by input obtained through contacts with researchers throughout the United States. Technologies are emerging that have exceptional promise for finding fractures in nonhomogeneous rock, especially during and after episodes of stimulation to enhance natural permeability.

  7. Geothermal Exploration Policy Mechanisms: Lessons for the United States from International Applications

    SciTech Connect (OSTI)

    Speer, B.; Economy, R.; Lowder, T.; Schwabe, P.; Regenthal, S.

    2014-05-01

    This report focuses on five of the policy types that are most relevant to the U.S. market and political context for the exploration and confirmation of conventional hydrothermal (geothermal) resources in the United States: (1) drilling failure insurance, (2) loan guarantees, (3) subsidized loans, (4) capital subsidies, and (5) government-led exploration. It describes each policy type and its application in other countries and regions. It offers policymakers a guide for drafting future geothermal support mechanisms for the exploration-drilling phase of geothermal development.

  8. THE FUTURE OF GEOTHERMAL ENERGY

    SciTech Connect (OSTI)

    J. L. Renner

    2006-11-01

    Recent national focus on the value of increasing our supply of indigenous, renewable energy underscores the need for reevaluating all alternatives, particularly those that are large and welldistributed nationally. This analysis will help determine how we can enlarge and diversify the portfolio of options we should be vigorously pursuing. One such option that is often ignored is geothermal energy, produced from both conventional hydrothermal and Enhanced (or engineered) Geothermal Systems (EGS). An 18-member assessment panel was assembled in September 2005 to evaluate the technical and economic feasibility of EGS becoming a major supplier of primary energy for U.S. base-load generation capacity by 2050. This report documents the work of the panel at three separate levels of detail. The first is a Synopsis, which provides a brief overview of the scope, motivation, approach, major findings, and recommendations of the panel. At the second level, an Executive Summary reviews each component of the study, providing major results and findings. The third level provides full documentation in eight chapters, with each detailing the scope, approach, and results of the analysis and modeling conducted in each area.

  9. Results of geothermal gradient core hole TCB-1, Tecuamburro volcano geothermal site, Guatemala, Central America

    SciTech Connect (OSTI)

    Adams, A.I.; Chipera, S.; Counce, D.; Gardner, J.; Goff, S.; Goff, F.; Heiken, G.; Laughlin, A.W.; Musgrave, J.; Trujillo, P.E. Jr. (Los Alamos National Lab., NM (United States)); Aycinena, S.; Martinelli, L. (Swissboring Overseas Corp. Ltd., Guatemala City (Guatemala)); Castaneda, O.; Revolorio, M.; Roldan, A. (Unidad de Desarrollo Geotermico, Guatemala City (Guatemala). Inst. Nacional de Electrificacion); D

    1992-02-01

    Results of geological, volcanological, hydrogeochemical, and geophysical field studies conducted in 1988 and 1989 at the Tecuamburro volcano geothermal site in Guatemala indicated that there is a substantial shallow heat source beneath the area of youngest volcanism. To obtain information on subsurface temperatures and temperature gradients, stratigraphy, hydrothermal alteration, fracturing, and possible inflows of hydrothermal fluids, a geothermal gradient core hole (TCB-1) was drilled to 808 m low on the northern flank of the Tecuamburro volcano Complex, 300 km south of a 300-m-diameter phreatic crater, Laguna Ixpaco, dated at 2,910 years. Gases from acid-sulfate springs near Laguna Ixpaco consistently yield maximum estimated subsurface temperatures of 250--300{degrees}C. The temperature versus depth curve from TCB-1 does not show isothermal conditions and the calculated thermal gradients from 500--800 m is 230{degrees}C/km. Bottom hole temperature is 238{degrees}C. Calculated heat flow values are nearly 9 heat flow units (HFU). The integration of results from the TCB-1 gradient core hole with results from field studies provides strong evidence that the Tecuamburro area holds great promise for containing a commercial geothermal resource.

  10. Hydrothermal Processing of Wet Wastes

    Broader source: Energy.gov [DOE]

    Breakout Session 3A—Conversion Technologies III: Energy from Our Waste—Will we Be Rich in Fuel or Knee Deep in Trash by 2025? Hydrothermal Processing of Wet Wastes James R. Oyler, President, Genifuel Corporation

  11. Geothermal Program Review X: proceedings. Geothermal Energy and the Utility Market -- the Opportunities and Challenges for Expanding Geothermal Energy in a Competitive Supply Market

    SciTech Connect (OSTI)

    Not Available

    1992-01-01

    Each year the Geothermal Division of the US Department of Energy conducts an in-depth review of its entire geothermal R&D program. The conference serves several purposes: a status report on current R&D activities, an assessment of progress and problems, a review of management issues, and a technology transfer opportunity between DOE and the US geothermal city. This year`s conference, Program Review X, was held in San Francisco on March 24--26, 1992. The theme of the review, ``Geothermal Energy and the Utility Market -- The Opportunities and Challenges for Expanding Geothermal Energy in a Competitive Supply Market,`` focused on the needs of the electric utility sector. Geothermal energy, with its power capacity potential of 10 GWe by the year 2010, can provide reliable, enviromentally clean electricity which can help offset the projected increase in demand. Program Review X consisted of seven sessions including an opening session with presentations by Mr. Vikram Budhraja, Vice President of System Planning and Operations, Southern California Edison Company, and Mr. Richard Jaros, President and Chief Operating Officer, California Energy Company. The six technical sessions included presentations by the relevant field researchers covering DOE-sponsored R&D in hydrothermal, hot dry rock, and geopressured energy. Individual projects are processed separately for the data bases.

  12. Hydrothermal Resources Fact Sheet | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    The Dixie Valley Geothermal Plant in Nevada produces 60 MW of electricity. A Roadmap for Strategic Development of Geothermal Exploration Technologies Federal Interagency...

  13. Stanford Geothermal Program Final Report

    E-Print Network [OSTI]

    Stanford University

    1 Stanford Geothermal Program Final Report July 1990 - June 1996 Stanford Geothermal Program. THE EFFECTS OF ADSORPTION ON VAPOR-DOMINATED GEOTHERMAL FIELDS.1 1.1 SUMMARY? ..............................................................................................2 1.4 ADSORPTION IN GEOTHERMAL RESERVOIRS ........................................................3

  14. Application of scientific core drilling to geothermal exploration: Platanares, Honduras and Tecuamburro Volcano, Guatemala, Central America

    SciTech Connect (OSTI)

    Goff, S.J.; Goff, F.E.; Heiken, G.H. [Los Alamos National Lab., NM (United States); Duffield, W.A. [Geological Survey, Flagstaff, AZ (United States); Janik, C.J. [Geological Survey, Menlo Park, CA (United States)

    1994-04-01

    Our efforts in Honduras and Guatemala were part of the Central America Energy Resource Project (CAERP) funded by the United States Agency for International Development (AID). Exploration core drilling operations at the Platanares, Honduras and Tecuamburro Volcano, Guatemala sites were part of a geothermal assessment for the national utility companies of these countries to locate and evaluate their geothermal resources for electrical power generation. In Honduras, country-wide assessment of all thermal areas determined that Platanares was the site with the greatest geothermal potential. In late 1986 to middle 1987, three slim core holes were drilled at Platanares to a maximum depth of 680 m and a maximum temperature of 165{degree}C. The objectives were to obtain information on the geothermal gradient, hydrothermal alterations, fracturing, and possible inflows of hydrothermal fluids. Two holes produced copious amounts of water under artesian conditions and a total of 8 MW(t) of energy. Geothermal investigations in Guatemala focused on the Tecuamburro Volcano geothermal site. The results of surface geological, volcanological, hydrogeochemical, and geophysical studies at Tecuamburro Volcano indicated a substantial shallow heat source. In early 1990 we drilled one core hole, TCB-1, to 808 m depth. The measured bottom hole temperature was 238{degree}C. Although the borehole did not flow, in-situ samples indicate the hole is completed in a vapor-zone above a probable 300{degree}C geothermal reservoir.

  15. Geothermal Literature Review At Cascades Region (Ingebritsen...

    Open Energy Info (EERE)

    Geothermal Literature Review At Cascades Region (Ingebritsen & Mariner, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  16. Wyoming/Geothermal | Open Energy Information

    Open Energy Info (EERE)

    (MW) Number of Plants Owners Geothermal Region Huckleberry Hot Springs Geothermal Area Yellowstone Caldera Geothermal Region Seven Mile Hole Geothermal Area Yellowstone Caldera...

  17. Induced seismicity associated with enhanced geothermal system

    E-Print Network [OSTI]

    Majer, Ernest L.

    2006-01-01

    induced seismicity in geothermal systems. In: Proceedings ofThe deep EGS (Enhanced Geothermal System) project at Soultz-with enhanced geothermal systems. Geothermal Resources

  18. Guidebook to Geothermal Finance

    SciTech Connect (OSTI)

    Salmon, J. P.; Meurice, J.; Wobus, N.; Stern, F.; Duaime, M.

    2011-03-01

    This guidebook is intended to facilitate further investment in conventional geothermal projects in the United States. It includes a brief primer on geothermal technology and the most relevant policies related to geothermal project development. The trends in geothermal project finance are the focus of this tool, relying heavily on interviews with leaders in the field of geothermal project finance. Using the information provided, developers and investors may innovate in new ways, developing partnerships that match investors' risk tolerance with the capital requirements of geothermal projects in this dynamic and evolving marketplace.

  19. Pumpernickel Valley Geothermal Project Thermal Gradient Wells

    SciTech Connect (OSTI)

    Z. Adam Szybinski

    2006-01-01

    The Pumpernickel Valley geothermal project area is located near the eastern edge of the Sonoma Range and is positioned within the structurally complex Winnemucca fold and thrust belt of north-central Nevada. A series of approximately north-northeast-striking faults related to the Basin and Range tectonics are superimposed on the earlier structures within the project area, and are responsible for the final overall geometry and distribution of the pre-existing structural features on the property. Two of these faults, the Pumpernickel Valley fault and Edna Mountain fault, are range-bounding and display numerous characteristics typical of strike-slip fault systems. These characteristics, when combined with geophysical data from Shore (2005), indicate the presence of a pull-apart basin, formed within the releasing bend of the Pumpernickel Valley – Edna Mountain fault system. A substantial body of evidence exists, in the form of available geothermal, geological and geophysical information, to suggest that the property and the pull-apart basin host a structurally controlled, extensive geothermal field. The most evident manifestations of the geothermal activity in the valley are two areas with hot springs, seepages, and wet ground/vegetation anomalies near the Pumpernickel Valley fault, which indicate that the fault focuses the fluid up-flow. There has not been any geothermal production from the Pumpernickel Valley area, but it was the focus of a limited exploration effort by Magma Power Company. In 1974, the company drilled one exploration/temperature gradient borehole east of the Pumpernickel Valley fault and recorded a thermal gradient of 160oC/km. The 1982 temperature data from five unrelated mineral exploration holes to the north of the Magma well indicated geothermal gradients in a range from 66 to 249oC/km for wells west of the fault, and ~283oC/km in a well next to the fault. In 2005, Nevada Geothermal Power Company drilled four geothermal gradient wells, PVTG-1, -2, -3, and -4, and all four encountered geothermal fluids. The holes provided valuable water geochemistry, supporting the geothermometry results obtained from the hot springs and Magma well. The temperature data gathered from all the wells clearly indicates the presence of a major plume of thermal water centered on the Pumpernickel Valley fault, and suggests that the main plume is controlled, at least in part, by flow from this fault system. The temperature data also defines the geothermal resource with gradients >100oC/km, which covers an area a minimum of 8 km2. Structural blocks, down dropped with respect to the Pumpernickel Valley fault, may define an immediate reservoir. The geothermal system almost certainly continues beyond the recently drilled holes and might be open to the east and south, whereas the heat source responsible for the temperatures associated with this plume has not been intersected and must be at a depth greater than 920 meters (depth of the deepest well – Magma well). The geological and structural setting and other characteristics of the Pumpernickel Valley geothermal project area are markedly similar to the portions of the nearby Dixie Valley geothermal field. These similarities include, among others, the numerous, unexposed en echelon faults and large-scale pull-apart structure, which in Dixie Valley may host part of the geothermal field. The Pumpernickel Valley project area, for the majority of which Nevada Geothermal Power Company has geothermal rights, represents a geothermal site with a potential for the discovery of a relatively high temperature reservoir suitable for electric power production. Among locations not previously identified as having high geothermal potential, Pumpernickel Valley has been ranked as one of four sites with the highest potential for electrical power production in Nevada (Shevenell and Garside, 2003). Richards and Blackwell (2002) estimated the total heat loss and the preliminary production capacity for the entire Pumpernickel Valley geothermal system to be at 35MW. A more conservative estimate, for

  20. Geothermal energy and the utility market -- the opportunities and challenges for expanding geothermal energy in a competitive supply market: Proceedings

    SciTech Connect (OSTI)

    Not Available

    1992-01-01

    Each year the Geothermal Division of the US Department of Energy conducts an in-depth review of its entire geothermal R D program. The conference serves several purposes: a status report on current R D activities, an assessment of progress and problems, a review of management issues, and a technology transfer opportunity between DOE and the US geothermal city. This year's conference, Program Review X, was held in San Francisco on March 24--26, 1992. The theme of the review, Geothermal Energy and the Utility Market -- The Opportunities and Challenges for Expanding Geothermal Energy in a Competitive Supply Market,'' focused on the needs of the electric utility sector. Geothermal energy, with its power capacity potential of 10 GWe by the year 2010, can provide reliable, enviromentally clean electricity which can help offset the projected increase in demand. Program Review X consisted of seven sessions including an opening session with presentations by Mr. Vikram Budhraja, Vice President of System Planning and Operations, Southern California Edison Company, and Mr. Richard Jaros, President and Chief Operating Officer, California Energy Company. The six technical sessions included presentations by the relevant field researchers covering DOE-sponsored R D in hydrothermal, hot dry rock, and geopressured energy. Individual projects are processed separately for the data bases.

  1. GEOTHERM Data Set

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    DeAngelo, Jacob

    GEOTHERM is a comprehensive system of public databases and software used to store, locate, and evaluate information on the geology, geochemistry, and hydrology of geothermal systems. Three main databases address the general characteristics of geothermal wells and fields, and the chemical properties of geothermal fluids; the last database is currently the most active. System tasks are divided into four areas: (1) data acquisition and entry, involving data entry via word processors and magnetic tape; (2) quality assurance, including the criteria and standards handbook and front-end data-screening programs; (3) operation, involving database backups and information extraction; and (4) user assistance, preparation of such items as application programs, and a quarterly newsletter. The principal task of GEOTHERM is to provide information and research support for the conduct of national geothermal-resource assessments. The principal users of GEOTHERM are those involved with the Geothermal Research Program of the U.S. Geological Survey.

  2. GEOTHERMAL POWER GENERATION PLANT

    Broader source: Energy.gov [DOE]

    Project objectives: Drilling a deep geothermal well on the Oregon Institute of Technology campus, Klamath Falls, OR. Constructing a geothermal power plant on the Oregon Institute of Technology campus.

  3. GEOTHERM Data Set

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    DeAngelo, Jacob

    1983-01-01

    GEOTHERM is a comprehensive system of public databases and software used to store, locate, and evaluate information on the geology, geochemistry, and hydrology of geothermal systems. Three main databases address the general characteristics of geothermal wells and fields, and the chemical properties of geothermal fluids; the last database is currently the most active. System tasks are divided into four areas: (1) data acquisition and entry, involving data entry via word processors and magnetic tape; (2) quality assurance, including the criteria and standards handbook and front-end data-screening programs; (3) operation, involving database backups and information extraction; and (4) user assistance, preparation of such items as application programs, and a quarterly newsletter. The principal task of GEOTHERM is to provide information and research support for the conduct of national geothermal-resource assessments. The principal users of GEOTHERM are those involved with the Geothermal Research Program of the U.S. Geological Survey.

  4. Summer 2012 National Geothermal Academy: Applications Due February...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Course modules include: Introduction to Geothermal Energy Utilization Geothermal Geology and Geochemistry Geothermal Field Trips Geothermal Geophysics Drilling Engineering...

  5. Geothermal | ornl.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Applying advanced materials to improve well construction technologies Development of harsh environment sensors for reservoir characterization DOE Geothermal Technologies Office...

  6. South Dakota geothermal handbook

    SciTech Connect (OSTI)

    Not Available

    1980-06-01

    The sources of geothermal fluids in South Dakota are described and some of the problems that exist in utilization and materials selection are described. Methods of heat extraction and the environmental concerns that accompany geothermal fluid development are briefly described. Governmental rules, regulations and legislation are explained. The time and steps necessary to bring about the development of the geothermal resource are explained in detail. Some of the federal incentives that encourage the use of geothermal energy are summarized. (MHR)

  7. Other Geothermal Energy Publications

    Broader source: Energy.gov [DOE]

    Here you'll find links to other organization's publications — including technical reports, newsletters, brochures, and more — about geothermal energy.

  8. Geothermal Industry Partnership Opportunities

    Broader source: Energy.gov [DOE]

    Here you'll find links to information about partnership opportunities and programs for the geothermal industry.

  9. Geothermal features of Snake River plain, Idaho

    SciTech Connect (OSTI)

    Blackwell, D.D.

    1987-08-01

    The Snake River plain is the track of a hot spot beneath the continental lithosphere. The track has passed through southern Idaho as the continental plate has moved over the hot spot at a rate of about 3.5 cm/yr. The present site of the hot spot is Yellowstone Park. As a consequence of the passage, a systematic sequence of geologic and tectonic events illustrates the response of the continental lithosphere to this hotspot event. The three areas that represent various time slices in the evolution are the Yellowstone Plateau, the Eastern Snake River plain downwarp, and the Western Snake River plain basin/Owhyee Plateau. In addition to the age of silicic volcanic activity, the topographic profile of the Snake River plain shows a systematic variation from the high elevations in the east to lowest elevations on the west. The change in elevation follows the form of an oceanic lithosphere cooling curve, suggesting that temperature change is the dominant effect on the elevation.

  10. Digital Mapping Of Structurally Controlled Geothermal Features...

    Open Energy Info (EERE)

    greatly speed the process of gathering data in the field and converting it into digital GIS-compatible formats. Authors Mark F. Coolbaugh, Chris Sladek, Chris Kratt and Gary...

  11. Relict Geothermal Features | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EIS Report UrlNM-b <Refurbished Projects WindEnergyWestern Us

  12. Modern Geothermal Features | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsourceII Jump to: navigation, searchsource History View NewOpenEnergy(Wilt &Modern

  13. Cost Contributors to Geothermal Power Production

    SciTech Connect (OSTI)

    Nathwani, Jay; Mines, Greg

    2011-07-01

    The US Department of Energy Geothermal Technologies Office (DOE-GTO) has developed the tool Geothermal Electricity Technologies Evaluation Model (GETEM) to assess the levelized cost of electricity (LCOE) of power produced from geothermal resources. Recently modifications to GETEM allow the DOE-GTO to better assess how different factors impact the generation costs, including initial project risk, time required to complete a development, and development size. The model characterizes the costs associated with project risk by including the costs to evaluate and drill those sites that are considered but not developed for commercial power generation, as well as to assign higher costs to finance those activities having more risk. This paper discusses how the important parameters impact the magnitude project costs for different project scenarios. The cost distributions presented include capital cost recovery for the exploration, confirmation, well field completion and power plant construction, as well as the operation and maintenance (O&M) costs. The paper will present these cost distributions for both EGS and hydrothermal resources.

  14. GEOTHERMAL PILOT STUDY FINAL REPORT: CREATING AN INTERNATIONAL GEOTHERMAL ENERGY COMMUNITY

    E-Print Network [OSTI]

    Bresee, J. C.

    2011-01-01

    B. Direct Application of Geothermal Energy . . . . . . . . .Reservoir Assessment: Geothermal Fluid Injection, ReservoirD. E. Appendix Small Geothermal Power Plants . . . . . . .

  15. Ecological and Geochemical Aspects of Terrestrial Hydrothermal Systems

    E-Print Network [OSTI]

    Forrest, Matthew James

    Yellowstone Ecosystem, A. boreas breed predominantly in geothermalYellowstone Ecosystem, A. boreas breed predominantly in geothermalYellowstone Ecosystem, A. boreas breed predominantly in geothermal

  16. A Helium Isotope Perspective On The Dixie Valley, Nevada, Hydrothermal...

    Open Energy Info (EERE)

    System. Geothermics. () . Related Geothermal Exploration Activities Activities (4) Direct-Current Resistivity Survey At Dixie Valley Geothermal Area (Laney, 2005) Isotopic...

  17. The Future of Geothermal Energy

    E-Print Network [OSTI]

    Ito, Garrett

    The Future of Geothermal Energy Impact of Enhanced Geothermal Systems (EGS) on the United States in the 21st Century #12;The Future of Geothermal Energy Impact of Enhanced Geothermal Systems (EGS and Renewable Energy, Office of Geothermal Technologies, Under DOE Idaho Operations Office Contract DE-AC07-05ID

  18. Reservoir technology - geothermal reservoir engineering research at Stanford. Fifth annual report, October 1, 1984-September 30, 1985

    SciTech Connect (OSTI)

    Ramey, H.J. Jr.; Kruger, P.; Horne, R.N.; Miller, F.G.; Brigham, W.E.

    1985-09-01

    The objective is to carry out research on geothermal reservoir engineering techniques useful to the geothermal industry. A parallel objective is the training of geothermal engineers and scientists. The research is focused toward accelerated development of hydrothermal resources through the evaluation of fluid reserves, and the forecasting of field behavior with time. Injection technology is a research area receiving special attention. The program is divided into reservoir definition research, modeling of heat extraction from fractured reservoirs, application and testing of new and proven reservoir engineering technology, and technology transfer. (ACR)

  19. Reference book on geothermal direct use

    SciTech Connect (OSTI)

    Lienau, P.J.; Lund, J.W.; Rafferty, K.; Culver, G.

    1994-08-01

    This report presents the direct uses of geothermal energy in the United States. Topics discussed include: low-temperature geothermal energy resources; energy reserves; geothermal heat pumps; geothermal energy for residential buildings; and geothermal energy for industrial usage.

  20. Geothermal-energy files in computer storage: sites, cities, and industries

    SciTech Connect (OSTI)

    O'Dea, P.L.

    1981-12-01

    The site, city, and industrial files are described. The data presented are from the hydrothermal site file containing about three thousand records which describe some of the principal physical features of hydrothermal resources in the United States. Data elements include: latitude, longitude, township, range, section, surface temperature, subsurface temperature, the field potential, and well depth for commercialization. (MHR)

  1. Enhanced Geothermal Systems (EGS) well construction technology evaluation report.

    SciTech Connect (OSTI)

    Capuano, Louis, Jr.; Huh, Michael; Swanson, Robert; Raymond, David Wayne; Finger, John Travis; Mansure, Arthur James; Polsky, Yarom; Knudsen, Steven Dell

    2008-12-01

    Electricity production from geothermal resources is currently based on the exploitation of hydrothermal reservoirs. Hydrothermal reservoirs possess three ingredients critical to present day commercial extraction of subsurface heat: high temperature, in-situ fluid and high permeability. Relative to the total subsurface heat resource available, hydrothermal resources are geographically and quantitatively limited. A 2006 DOE sponsored study led by MIT entitled 'The Future of Geothermal Energy' estimates the thermal resource underlying the United States at depths between 3 km and 10 km to be on the order of 14 million EJ. For comparison purposes, total U.S. energy consumption in 2005 was 100 EJ. The overwhelming majority of this resource is present in geological formations which lack either in-situ fluid, permeability or both. Economical extraction of the heat in non-hydrothermal situations is termed Enhanced or Engineered Geothermal Systems (EGS). The technologies and processes required for EGS are currently in a developmental stage. Accessing the vast thermal resource between 3 km and 10 km in particular requires a significant extension of current hydrothermal practice, where wells rarely reach 3 km in depth. This report provides an assessment of well construction technology for EGS with two primary objectives: (1) Determining the ability of existing technologies to develop EGS wells. (2) Identifying critical well construction research lines and development technologies that are likely to enhance prospects for EGS viability and improve overall economics. Towards these ends, a methodology is followed in which a case study is developed to systematically and quantitatively evaluate EGS well construction technology needs. A baseline EGS well specification is first formulated. The steps, tasks and tools involved in the construction of this prospective baseline EGS well are then explicitly defined by a geothermal drilling contractor in terms of sequence, time and cost. A task and cost based analysis of the exercise is subsequently conducted to develop a deeper understanding of the key technical and economic drivers of the well construction process. Finally, future research & development recommendations are provided and ranked based on their economic and technical significance.

  2. Abraham Hot Springs Geothermal Area Northern Basin and Range...

    Open Energy Info (EERE)

    Basin and Range Geothermal Region Medical Hot Springs Geothermal Area Idaho Batholith Medicine Lake Geothermal Area Cascades Melozi Hot Springs Geothermal Area Alaska Geothermal...

  3. FRACTURE STIMULATION IN ENHANCED GEOTHERMAL

    E-Print Network [OSTI]

    Stanford University

    FRACTURE STIMULATION IN ENHANCED GEOTHERMAL SYSTEMS A REPORT SUBMITTED TO THE DEPARTMENT OF ENERGY (Principal Advisor) #12;#12;v Abstract Enhanced Geothermal Systems (EGS) are geothermal reservoirs formed

  4. Geothermal Outreach and Project Financing

    SciTech Connect (OSTI)

    Elizabeth Battocletti

    2006-04-06

    The ?Geothermal Outreach and Project Financing? project substantially added to the understanding of geothermal resources, technology, and small business development by both the general public as well as those in the geothermal community.

  5. Geothermal br Resource br Area Geothermal br Resource br Area...

    Open Energy Info (EERE)

    Area Central Nevada Seismic Zone Pull Apart in Strike Slip Fault Zone Ordovician shale quartzite MW K Blue Mountain Geothermal Area Blue Mountain Geothermal Area Northwest...

  6. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Area Exploration Technique Geothermal Literature Review Activity Date Usefulness useful DOE-funding Unknown Exploration Basis examining known geothermal sites in New Mexico Notes...

  7. Exploration and drilling for geothermal heat in the Capital District, New York. Volume 4. Final report

    SciTech Connect (OSTI)

    Not Available

    1983-08-01

    The Capital District area of New York was explored to determine the nature of a hydrothermal geothermal system. The chemistry of subsurface water and gas, the variation in gravity, magnetism, seismicity, and temperature gradients were determined. Water and gas analyses and temperature gradient measurements indicate the existence of a geothermal system located under an area from Ballston Spa, southward to Altamont, and eastward toward Albany. Gravimetric and magnetic surveys provided little useful data but microseismic activity in the Altamont area may be significant. Eight wells about 400 feet deep, one 600 feet and one 2232 feet were drilled and tested for geothermal potential. The highest temperature gradients, most unusual water chemistries, and greatest carbon dioxide exhalations were observed in the vicinity of the Saratoga and McGregor faults between Saratoga Springs and Schenectady, New York, suggesting some fault control over the geothermal system. Depths to the warm fluids within the system range from 500 meters (Ballston Spa) to 2 kilometers (Albany).

  8. Exploration and drilling for geothermal heat in the Capital District, New York. Final report

    SciTech Connect (OSTI)

    Not Available

    1983-08-01

    The Capital District area of New York was explored to determine the nature of a hydrothermal geothermal system. The chemistry of subsurface water and gas, the variation in gravity, magnetism, seismicity, and temperature gradients were determined. Water and gas analyses and temperature gradient measurements indicate the existence of a geothermal system located under an area from Ballston Spa, southward to Altamont, and eastware toward Albany. Gravimetric and magnetic surveys provided little useful data but microseismic activity in the Altamont area may be significant. Eight wells about 400 feet deep, one 600 feet and one 2232 feet were drilled and tested for geothermal potential. The highest temperature gradients, most unusual water chemistries, and greatest carbon dioxide exhalations were observed in the vicinity of the Saratoga and McGregor faults between Saratoga Springs and Schenectady, New York, suggesting some fault control over the geothermal system. Depths to the warm fluids within the system range from 500 meters (Ballston Spa) to 2 kilometers (Albany).

  9. Thermal Fracturing of Geothermal Wells and the Effects of Borehole Orientation

    E-Print Network [OSTI]

    Hals, Kjetil M D

    2012-01-01

    An enhanced geothermal system (EGS) expands the potential of geothermal energy by enabling the exploitation of regions that lack conventional hydrothermal resources. The EGS subsurface system is created by engineering enhanced flow paths between injection and production wells. Hydraulic stimulation of existing fracture networks has been successfully achieved for unconventional geothermal resources. More recently proposed concepts increase the use of drilled wellbores in hard rock to connect the injection and production wells. The present work investigates the long-term thermal effects of deviated geothermal wellbores and studies how the cooling of the borehole wall results in thermally induced tensile fractures. The results show that induced fractures are created by a combination of in situ and thermal stresses, and that the extent to which thermally induced tensile wall fractures are created largely depends on how the wellbores are oriented with respect to the pre-existing stresses of the reservoir. If the s...

  10. Auburn low-temperature geothermal well. Volume 6. Final report

    SciTech Connect (OSTI)

    Lynch, R.S.; Castor, T.P.

    1983-12-01

    The Auburn well was drilled to explore for low temperature geothermal resources in central New York State. The Auburn site was selected based on: its proximity to the Cayuga County anomaly (30/sup 0/C/km), its favorable local geological conditions and the potential to provide hot water and space heating to two educational facilities. The well was drilled to a total depth of 5250 feet and into the Pre-Cambrian Basement. The well was extensively logged, flow and stress tested, hydraulically stimulated, and pump (pressure transient analysis) tested. The low-temperature geothermal potential was assessed in terms of: geological environment; hydrological conditions; reservoir characteristics; and recoverable hydrothermal reserves. The average geothermal gradient was measured to be as high as 26.7/sup 0/C/km with a bottom-hole temperature of 126/sup 0/ +- 1/sup 0/F. The proved volumetric resources were estimated to be 3.0 x 10/sup 6/ stock tank barrels (STB) with a maximum initial deliverability of approx.11,600 STB/D and a continuous deliverability of approx.3400 STB/D. The proved hydrothermal reserves were estimated to be 21.58 x 10/sup 10/ Btu based on a volumetric component (4.13 x 10/sup 10/ Btu), and a reinjection component (17.45 x 10/sup 10/ Btu). The conclusion was made that the Auburn low-temperature reservoir could be utilized to provide hot water and space heating to the Auburn School District.

  11. Geothermal Technologies Program: Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Not Available

    2004-08-01

    This general publication describes enhanced geothermal systems (EGS) and the principles of operation. It also describes the DOE program R&D efforts in this area, and summarizes several projects using EGS technology.

  12. Geothermal Today - 2001

    SciTech Connect (OSTI)

    2001-08-01

    U.S. Department of Energy Geothermal Energy Program Highlights Partnering with Industry A New Power Source for Nevada Drilling Research Finding Geothermal Resources Small-Scale Geothermal Power Plants The Heat Beneath Your Feet R&D 100 Award Program in Review Milestones January 2000 The U.S. Department of Energy GeoPowering the West initiative was launched. February 2000 Grants totaling $4.8 million were awarded in six western states, primarily for development of reservoir exploration, character

  13. Geothermal Today - 1999

    SciTech Connect (OSTI)

    2000-05-01

    U.S. Department of Energy 1999 Geothermal Energy Program Highlights The Hot Facts Getting into Hot Water Turning Waste water into Clean Energy Producing Even Cleaner Power Drilling Faster and Cheaper Program in Review 1999: The Year in Review JanuaryCal Energy announced sale of Coso geothermal power plants at China Lake, California, to Caithness Energy, for $277 million. U.S. Export-Import Bank completed a $50 million refinancing of the Leyte Geothermal Optimization Project in the Philippines. F

  14. National Geothermal Data System: Interactive Assessment of Geothermal Energy Potential in the U.S.

    SciTech Connect (OSTI)

    Allison, Lee; Richard, Stephen; Clark, Ryan; Patten, Kim; Love, Diane; Coleman, Celia; Chen, Genhan; Matti, Jordan; Pape, Estelle; Musil, Leah

    2012-01-30

    Geothermal-relevant geosciences data from all 50 states (www.stategeothermaldata.org), federal agencies, national labs, and academic centers are being digitized and linked in a distributed online network via the U.S. Department of Energy-funded National Geothermal Data System (NGDS) to foster geothermal energy exploration and development through use of interactive online ‘mashups,’data integration, and applications. Emphasis is first to make as much information as possible accessible online, with a long range goal to make data interoperable through standardized services and interchange formats. An initial set of thirty geoscience data content models is in use or under development to define a standardized interchange format: aqueous chemistry, borehole temperature data, direct use feature, drill stem test, earthquake hypocenter, fault feature, geologic contact feature, geologic unit feature, thermal/hot spring description, metadata, quaternary fault, volcanic vent description, well header feature, borehole lithology log, crustal stress, gravity, heat flow/temperature gradient, permeability, and feature descriptions data like developed geothermal systems, geologic unit geothermal properties, permeability, production data, rock alteration description, rock chemistry, and thermal conductivity. Map services are also being developed for isopach maps, aquifer temperature maps, and several states are working on geothermal resource overview maps. Content models are developed preferentially from existing community use in order to encourage widespread adoption and promulgate minimum metadata quality standards. Geoscience data and maps from other NGDS participating institutions, or “nodes” (USGS, Southern Methodist University, Boise State University Geothermal Data Coalition) are being supplemented with extensive land management and land use resources from the Western Regional Partnership (15 federal agencies and 5 Western states) to provide access to a comprehensive, holistic set of data critical to geothermal energy development. As of September 2011, we have over 34,000 records registered in the system catalog, and 234,942 data resources online, along with scores of Web services to deliver integrated data to the desktop for free downloading or online use. The data exchange mechanism is built on the U.S. Geoscience Information Network (USGIN, http://usgin.org and http://lab.usgin.org) protocols and standards developed as a partnership of the Association of American State Geologists (AASG) and U.S. Geological Survey.

  15. Geothermal Life Cycle Calculator

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Sullivan, John

    2014-03-11

    This calculator is a handy tool for interested parties to estimate two key life cycle metrics, fossil energy consumption (Etot) and greenhouse gas emission (ghgtot) ratios, for geothermal electric power production. It is based solely on data developed by Argonne National Laboratory for DOE’s Geothermal Technologies office. The calculator permits the user to explore the impact of a range of key geothermal power production parameters, including plant capacity, lifetime, capacity factor, geothermal technology, well numbers and depths, field exploration, and others on the two metrics just mentioned. Estimates of variations in the results are also available to the user.

  16. Geothermal Life Cycle Calculator

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Sullivan, John

    This calculator is a handy tool for interested parties to estimate two key life cycle metrics, fossil energy consumption (Etot) and greenhouse gas emission (ghgtot) ratios, for geothermal electric power production. It is based solely on data developed by Argonne National Laboratory for DOE’s Geothermal Technologies office. The calculator permits the user to explore the impact of a range of key geothermal power production parameters, including plant capacity, lifetime, capacity factor, geothermal technology, well numbers and depths, field exploration, and others on the two metrics just mentioned. Estimates of variations in the results are also available to the user.

  17. National Laboratory Geothermal Publications

    Broader source: Energy.gov [DOE]

    You can find publications, including technical papers and reports, about geothermal technologies, research, and development at the following U.S. Department of Energy national laboratories.

  18. Geothermal Outreach Publications

    Broader source: Energy.gov [DOE]

    Here you'll find the U.S. Department of Energy's (DOE) most recent outreach publications about geothermal technologies, research, and development.

  19. Geothermal Reservoir Dynamics - TOUGHREACT

    E-Print Network [OSTI]

    2005-01-01

    enhanced geothermal systems (EGS) and hot dry rock (HDR),deformation, to demonstrate new EGS technology through fieldsystems, primarily focusing on EGS and HDR systems and on

  20. Geothermal Heat Pumps

    Broader source: Energy.gov [DOE]

    Geothermal heat pumps are expensive to install but pay for themselves over time in reduced heating and cooling costs. Find out if one is right for your home.

  1. Southwest Alaska Regional Geothermal Energy Project

    SciTech Connect (OSTI)

    Holdmann, Gwen

    2015-04-30

    The village of Elim, Alaska is 96 miles west of Nome, on the Seward Peninsula. The Darby Mountains north of the village are rich with hydrothermal systems associated with the Darby granitic pluton(s). In addition to the hot springs that have been recorded and studied over the last 100 years, additional hot springs exist. They are known through a rich oral history of the region, though they are not labeled on geothermal maps. This research primarily focused on Kwiniuk Hot Springs, Clear Creek Hot Springs and Molly’s Hot Springs. The highest recorded surface temperatures of these resources exist at Clear Creek Hot Springs (67°C). Repeated water sampling of the resources shows that maximum temperatures at all of the systems are below boiling.

  2. Stratigraphy, Structure, Hydrothermal Alteration and Ore Mineralizatio...

    Open Energy Info (EERE)

    Stratigraphy, Structure, Hydrothermal Alteration and Ore Mineralization Encountered in CSDP (Continental Scientific Drilling Program) Corehole VC-2A, Sulphur Springs Area, Valles...

  3. Structural Settings Of Hydrothermal Outflow- Fracture Permeability...

    Open Energy Info (EERE)

    long-lived hydrothermal flow despite potential clogging of fractures due to mineral precipitation. As fault systems evolve, propagation, interaction, and linkage of fault segments...

  4. Fact sheets relating to use of geothermal energy in the United States

    SciTech Connect (OSTI)

    1980-12-01

    A compilation of data relating to geothermal energy in each of the 50 states is presented. The data are summarized on one page for each state. All summary data sheets use a common format. Following the summary data sheet there are additional data on the geology of each state pertaining to possible hydrothermal/geothermal resources. Also there is a list of some of the reports available pertaining to the state and state energy contacts. The intent of these documents is to present in a concise form reference data for planning by the Department of Energy.

  5. A re-evaluation of the Moyuta geothermal system, Southern Guatemala

    SciTech Connect (OSTI)

    Goff, F.; Adams, A.; Trujillo, P.E.; Counce, D. (Los Alamos National Lab., NM (USA)); Janik, C.; Fahlquist, L. (Geological Survey, Menlo Park, CA (USA)); Roldan, A.; Revolorio, M. (Instituto Nacional de Electrificacion, Guatemala City (Guatemala). Unidad de Desarollo Geotermico)

    1991-01-01

    Chemical and isotopic data from four fumarole sites combined with prefeasibility assessments obtained in the 1970s have resulted in a re-evaluation of the Moyuta geothermal system. Moyuta consists of an east-west trending complex of Quaternary andesite/dacite domes and flows cut by north-trending faults. Areas of fumaroles, acid springs, and bicarbonate-rich thermal springs flank the north and south sides of the volcanic complex. Chloride-rich thermal springs discharge along rivers at lower elevations around the Moyuta highland. The distribution of thermal features indicates that deep reservoir fluid rises convectively near the axis of volcanism. Geochemical data suggest that there are two subsystems having temperatures of about 210{degrees}C (north flank) and 170{degrees}C (south flank). Exploration wells sited near the most northerly fumarole (Azulco) achieved temperatures of {le}113{degrees}C at 1004 m depth. We suggest the fumaroles occur above hydrothermal outflow plumes confined to vertical, fault-controlled conduits. Better drilling sites occur closer to the intersections of the north trending faults and the Quaternary volcanic axis. 21 refs., 7 figs., 2 tabs.

  6. Possible Origin of Improved High Temperature Performance of Hydrothermally Aged Cu/Beta Zeolite Catalysts

    SciTech Connect (OSTI)

    Peden, Charles HF; Kwak, Ja Hun; Burton, Sarah D.; Tonkyn, Russell G.; Kim, Do Heui; Lee, Jong H.; Jen, H. W.; Cavattaio, Giovanni; Cheng, Yisun; Lambert, Christine

    2012-04-30

    The hydrothermal stability of Cu/beta NH3 SCR catalysts are explored here. In particular, this paper focuses on the interesting ability of this catalyst to maintain and even enhance high-temperature performance for the "standard" SCR reaction after modest (900 °C, 2 hours) hydrothermal aging. Characterization of the fresh and aged catalysts was performed with an aim to identify possible catalytic phases responsible for the enhanced high temperature performance. XRD, TEM and 27Al NMR all showed that the hydrothermally aging conditions used here resulted in almost complete loss of the beta zeolite structure between 1 and 2 hours aging. While the 27Al NMR spectra of 2 and 10 hour hydrothermally-aged catalysts showed significant loss of a peak associated with tetrahedrally-coordinated Al species, no new spectral features were evident. Two model catalysts, suggested by these characterization data as possible mimics of the catalytic phase formed during hydrothermal aging of Cu/beta, were prepared and tested for their performance in the "standard" SCR and NH3 oxidation reactions. The similarity in their reactivity compared to the 2 hour hydrothermally-aged Cu/beta catalyst suggests possible routes for preparing multi-component catalysts that may have wider temperature windows for optimum performance than those provided by current Cu/zeolite catalysts.

  7. A Technical Databook for Geothermal Energy Utilization

    E-Print Network [OSTI]

    Phillips, S.L.

    1981-01-01

    A TECHNICAL DATABOOK FOR GEOTHERMAL ENERGY UTILIZATION S.L.Technical Databook for Geothermal Energy Utilization* s. L.Survey, Menlo Park, CA. Geothermal Energy Development, CA.

  8. SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL

    E-Print Network [OSTI]

    Narasimhan, T.N.

    2013-01-01

    the potential use of geothermal energy for power generation47. Boldizsar, T. , 1970, "Geothermal energy production fromCoast Geopressure Geothermal Energy Conference, M.H. Dorfman

  9. NATIONAL GEOTHERMAL INFORMATION RESOURCE ANNUAL REPORT, 1977

    E-Print Network [OSTI]

    Phillips, Sidney L.

    2012-01-01

    an International Geothermal Energy Comnuni ty", J .C.environmental aspects of geothermal energy which provide theby GRID for geothermal energy have wider applications. In

  10. ANNOTATED RESEARCH BIBLIOGRAPHY FOR GEOTHERMAL RESERVOIR ENGINEERING

    E-Print Network [OSTI]

    Sudo!, G.A

    2012-01-01

    I 2nd Geopressured Geothermal Energy Conference. UniversityExperiment t o Extract Geothermal Energy From Hot Dry Rock."2nd Geo- pressured Geothermal Energy Conference, Austin,

  11. Induced seismicity associated with enhanced geothermal system

    E-Print Network [OSTI]

    Majer, Ernest L.

    2006-01-01

    Cooper Basin, Australia. Geothermal Resources Council Trans.a hot fractured rock geothermal project. Engineering Geologyseismicity in The Geysers geothermal area, California. J.

  12. SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL

    E-Print Network [OSTI]

    Narasimhan, T.N.

    2013-01-01

    on the Cerro Prieto Geothermal Field, Baja California,monitoring at the Geysers Geothermal Field, California,~~W. and Faust, C. R. , 1979, Geothermal resource simulation:

  13. NORTHERN NEVADA GEOTHERMAL EXPLORATION STRATEGY ANALYSIS

    E-Print Network [OSTI]

    Goldstein, N.E.

    2011-01-01

    School of Mines Nevada Geothermal Study: Report No. 4, Feb.J. , 1976, Assessing the geothermal resource base of the1977, Microseisms in geothermal Studies in Grass Valley,

  14. ANALYSIS OF PRODUCTION DECLINE IN GEOTHERMAL RESERVOIRS

    E-Print Network [OSTI]

    Zais, E.J.; Bodvarsson, G.

    2008-01-01

    Petroleum Reservoirs. Geothermal Reservoirs IV. DATA1970, Superheating of Geothermal Steam, Proc. of the U.N.the Development & Utilization of Geothermal Resources, Pisa.

  15. GEOTHERMAL RESERVOIR SIMULATIONS WITH SHAFT79

    E-Print Network [OSTI]

    Pruess, Karsten

    2012-01-01

    that well blocks must geothermal reservoir s·tudies, paperof Califomia. LBL-10066 GEOTHERMAL RESERVOIR SIMULATIONSbe presented at the Fifth Geothermal Reservoir Engineering

  16. Nevada/Geothermal | Open Energy Information

    Open Energy Info (EERE)

    Confirmation Silver Peak Geothermal Area Walker-Lane Transition Zone Geothermal Region Smith Creek Geothermal Project Ormat Phase I - Resource Procurement and Identification Smith...

  17. ANNOTATED RESEARCH BIBLIOGRAPHY FOR GEOTHERMAL RESERVOIR ENGINEERING

    E-Print Network [OSTI]

    Sudo!, G.A

    2012-01-01

    characteristics of geothermal boreholes are studied.Maini, Tidu. "Geothermal Energy From a Borehole i n H o t28 (1967): Borehole Temperature Survey Analysis Geothermal

  18. SEISMOLOGICAL INVESTIGATIONS AT THE GEYSERS GEOTHERMAL FIELD

    E-Print Network [OSTI]

    Majer, E. L.

    2011-01-01

    of the Salton Sea Geothermal System. pp. 129-166. Hubbert,and Lardarello: Geothermal Power Systems New Zealand Journalthe western edge of the geothermal system. Attenuation In

  19. SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL

    E-Print Network [OSTI]

    Narasimhan, T.N.

    2013-01-01

    is a vapor dominated geothermal system and is the largestin liquid-dominated geothermal systems, 11 Proceedings,histories relating to geothermal systems from around the

  20. Oregon/Geothermal | Open Energy Information

    Open Energy Info (EERE)

    Phase III - Permitting and Initial Development Neal Hot Springs Geothermal Area Snake River Plain Neal Hot Springs II Geothermal Project U.S. Geothermal Vale, Oregon Phase I -...

  1. Geothermal Food Processors Agricultural Drying Low Temperature...

    Open Energy Info (EERE)

    Geothermal Food Processors Agricultural Drying Low Temperature Geothermal Facility Jump to: navigation, search Name Geothermal Food Processors Agricultural Drying Low Temperature...

  2. Induced seismicity associated with enhanced geothermal system

    E-Print Network [OSTI]

    Majer, Ernest L.

    2006-01-01

    The deep EGS (Enhanced Geothermal System) project at Soultz-associated with enhanced geothermal systems. Geothermalfor a long-lived enhanced geothermal system (EGS) in the

  3. Geothermal energy program summary: Volume 2, Research summaries, fiscal year 1988

    SciTech Connect (OSTI)

    Not Available

    1989-03-01

    The Geothermal Technology Division (GTD) of the US Department of Energy (DOE) is charged with the lead federal role in the research and development (R&D) of technologies that will assist industry in economically exploiting the nation`s vast geothermal resources. The GTD R&D program represents a comprehensive, balanced approach to establishing all forms of geothermal energy as significant contributors to the nation`s energy supply. It is structured both to maintain momentum in the growth of the existing hydrothermal industry and to develop long-term options offering the greatest promise for practical applications. The Geothermal Energy Program Summary for Fiscal Year 1988 is a two-volume set designed to be an easily accessible reference to inform the US geothermal industry and other interested parties of the technological advances and progress achieved in the DOE geothermal program as well as to describe the thrust of the current R&D effort and future R&D directions. This volume, Volume II, contains a detailed compilation of each GTD-funded R&D activity performed by national laboratories or under contract to industrial, academic, and nonprofit research institutions. The Program Summary is intended as an important technology transfer vehicle to assure the wide and timely dissemination of information concerning the department`s geothermal research.

  4. The geothermal partnership: Industry, utilities, and government meeting the challenges of the 90's

    SciTech Connect (OSTI)

    Not Available

    1991-01-01

    Each year the Geothermal Division of the US Department of Energy conducts an in-depth review of its entire geothermal R D program. The conference serves several purposes: a status report on current R D activities, an assessment of progress and problems, a review of management issues, and a technology transfer opportunity between DOE and the US geothermal community. This year's conference, Program Review IX, was held in San Francisco on March 19--21, 1991. The theme of this review was The Geothermal Partnership -- Industry, Utilities, and Government Meeting the Challenges of the 90's.'' The importance of this partnership has increased markedly as demands for improved technology must be balanced with available research resources. By working cooperatively, the geothermal community, including industry, utilities, DOE, and other state and federal agencies, can more effectively address common research needs. The challenge currently facing the geothermal partnership is to strengthen the bonds that ultimately will enhance opportunities for future development of geothermal resources. Program Review IX consisted of eight sessions including an opening session. The seven technical sessions included presentations by the relevant field researchers covering DOE-sponsored R D in hydrothermal, hot dry rock, and geopressured energy and the progress associated with the Long Valley Exploratory Well. Individual papers have been cataloged separately.

  5. Temperature, Temperature, Earth, geotherm for

    E-Print Network [OSTI]

    Treiman, Allan H.

    Temperature, Temperature, Earth, geotherm for total global heat flow Venus, geotherm for total global heat flow, 500 Ma #12;Temperature, Temperature, #12;Earth's modern regional continental geotherms Venusian Geotherms, 500 Ma Temperature, Temperature, After Blatt, Tracy, and Owens Petrology #12;Ca2Mg5Si8

  6. STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY

    E-Print Network [OSTI]

    Stanford University

    STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY STANFORD, CALIFORNIA 34105 Stanford Geothermal, California SGP-TR-72 A RESERVOIR ENGINEERING ANALYSIS OF A VAPOR-DOMINATED GEOTHERMAL FIELD BY John Forrest Dee June 1983 Financial support was provided through the Stanford Geothermal Program under Department

  7. STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY

    E-Print Network [OSTI]

    Stanford University

    STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY Stanford Geothermal Program Interdisciplinary was provided through the Stanford Geothermal Program under Department of Energy Contract No. DE-AT03-80SF11459 heat sweep model for estimating energy recovery from fractured geothermal reservoirs based on early

  8. STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY

    E-Print Network [OSTI]

    Stanford University

    through September 30, 1982. The Stanford Geothermal Program conducts interdisciplinary research in the geothermal industry. In the first 10 years of the Program about 50 graduates have been trained in geotherSTANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY STANFORD, CALIFORNIA 94105 SGP-TR- 61 GEOTHERMAL

  9. Geothermal Financing Workbook

    SciTech Connect (OSTI)

    Battocletti, E.C.

    1998-02-01

    This report was prepared to help small firm search for financing for geothermal energy projects. There are various financial and economics formulas. Costs of some small overseas geothermal power projects are shown. There is much discussion of possible sources of financing, especially for overseas projects. (DJE-2005)

  10. Hydrothermal System | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History View NewGuam:on Openei | Open Energy InformationHydrothermal System

  11. R E S E A R C H A R T I C L E Microbial diversity in nonsulfur, sulfurand iron geothermal

    E-Print Network [OSTI]

    Kelley, Scott

    R E S E A R C H A R T I C L E Microbial diversity in nonsulfur, sulfurand iron geothermal steam. Abstract Fumaroles, commonly called steam vents, are ubiquitous features of geothermal habitats. Recent and isolated members of the Sulfolobales. Our results provide the first evidence of Archaea in geothermal steam

  12. Advanced Geothermal Turbodrill

    SciTech Connect (OSTI)

    W. C. Maurer

    2000-05-01

    Approximately 50% of the cost of a new geothermal power plant is in the wells that must be drilled. Compared to the majority of oil and gas wells, geothermal wells are more difficult and costly to drill for several reasons. First, most U.S. geothermal resources consist of hot, hard crystalline rock formations which drill much slower than the relatively soft sedimentary formations associated with most oil and gas production. Second, high downhole temperatures can greatly shorten equipment life or preclude the use of some technologies altogether. Third, producing viable levels of electricity from geothermal fields requires the use of large diameter bores and a high degree of fluid communication, both of which increase drilling and completion costs. Optimizing fluid communication often requires creation of a directional well to intersect the best and largest number of fracture capable of producing hot geothermal fluids. Moineau motor stators made with elastomers cannot operate at geothermal temperatures, so they are limited to the upper portion of the hole. To overcome these limitations, Maurer Engineering Inc. (MEI) has developed a turbodrill that does not use elastomers and therefore can operate at geothermal temperatures. This new turbodrill uses a special gear assembly to reduce the output speed, thus allowing a larger range of bit types, especially tri-cone roller bits, which are the bits of choice for drilling hard crystalline formations. The Advanced Geothermal Turbodrill (AGT) represents a significant improvement for drilling geothermal wells and has the potential to significantly reduce drilling costs while increasing production, thereby making geothermal energy less expensive and better able to compete with fossil fuels. The final field test of the AGT will prepare the tool for successful commercialization.

  13. National Geothermal Data System: A Geothermal Data System for Exploration and Development

    SciTech Connect (OSTI)

    Allison, Lee; Richard, Stephen; Patten, Kim; Love, Diane; Coleman, Celia; Chen, Genhan

    2012-09-30

    Geothermal-relevant geosciences data from all 50 states (www.stategeothermaldata.org), federal agencies, national labs, and academic centers are being digitized and linked in a distributed online network funded by the U.S. Department of Energy Geothermal Data System (GDS) to foster geothermal energy exploration and development through use of interactive online ‘mashups,’data integration, and applications. Emphasis is first to make as much information as possible accessible online, with a long range goal to make data interoperable through standardized services and interchange formats. A growing set of more than thirty geoscience data content models is in use or under development to define standardized interchange formats for: aqueous chemistry, borehole temperature data, direct use feature, drill stem test, seismic event hypocenter, fault feature, geologic contact feature, geologic unit feature, thermal/hot spring description, metadata, quaternary fault, volcanic vent description, well header feature, borehole lithology log, crustal stress, gravity, heat flow/temperature gradient, permeability, and feature description data like developed geothermal systems, geologic unit geothermal characterization, permeability, production data, rock alteration description, rock chemistry, and thermal conductivity. Map services are also being developed for isopach maps, aquifer temperature maps, and several states are working on geothermal resource overview maps. Content models are developed based on existing community datasets to encourage widespread adoption and promulgate content quality standards. Geoscience data and maps from other GDS participating institutions, or “nodes” (e.g., U.S. Geological Survey, Southern Methodist University, Oregon Institute of Technology, Stanford University, the University of Utah) are being supplemented with extensive land management and land use resources from the Western Regional Partnership (15 federal agencies and 5 Western states) to provide access to a comprehensive, holistic set of data critical to geothermal energy development. As of May 2012 , we have nearly 37,000 records registered in the system catalog, and 550,075 data resources online, along with hundreds of Web services to deliver integrated data to the desktop for free downloading or online use. The data exchange mechanism is built on the U.S. Geoscience Information Network (USGIN, http://usgin.org and http://lab.usgin.org) protocols and standards developed as a partnership of the Association of American State Geologists (AASG) and U.S. Geological Survey (USGS). Keywords Data

  14. Assessment of the Geothermal Potential Within the BPA Marketing Area.

    SciTech Connect (OSTI)

    Lund, John W.; Allen, Eliot D.

    1980-07-01

    The potential of geothermal energy is estimated that can be used for direct heat applications and electrical power generation within the Bonneville Power Administration (BPA) marketing area. The BPA marketing area includes three principal states of Oregon, Washington, and Idaho and portions of California, Montana, Wyoming, Nevada, and Utah bordering on these three states. This area covers approximately 384,000 square miles and has an estimated population of 6,760,000. The total electrical geothermal potential within this marketing area is 4077 MW/sub e/ from hydrothermal resources and 16,000 MW/sub e/ from igneous systems, whereas the total thermal (wellhead) potential is 16.15 x 10/sup 15/ Btu/y. Approximately 200 geothermal resource sites were initially identified within the BPA marketing area. This number was then reduced to about 100 sites thought to be the most promising for development by the year 2000. These 100 sites, due to load area overlap, were grouped into 53 composite sites; 21-3/4 within BPA preference customer areas and 31-1/4 within nonpreference customer areas. The geothermal resource potential was then estimated for high-temperature (> 302/sup 0/F = 150/sup 0/C), intermediate-temperature (194 to 302/sup 0/F = 90 to 150/sup 0/C), and low-temperature (< 194/sup 0/F = 90/sup 0/C) resources.

  15. Evolution of the geothermal fluids at Los Azufres, Mexico, as traced by noble gas isotopes, 18

    E-Print Network [OSTI]

    Long, Bernard

    following over 25 years of geothermal fluid exploitation. Mantle helium dominates in fluids from the north field has been extensively studied in the past 30 years for its geological and tectonic features (DobsonEvolution of the geothermal fluids at Los Azufres, Mexico, as traced by noble gas isotopes, 18 O, D

  16. Life-cycle analysis results of geothermal systems in comparison to other power systems.

    SciTech Connect (OSTI)

    Sullivan, J. L.; Clark, C. E.; Han, J.; Wang, M.; Energy Systems

    2010-10-11

    A life-cycle energy and greenhouse gas emissions analysis has been conducted with Argonne National Laboratory's expanded Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation (GREET) model for geothermal power-generating technologies, including enhanced geothermal, hydrothermal flash, and hydrothermal binary technologies. As a basis of comparison, a similar analysis has been conducted for other power-generating systems, including coal, natural gas combined cycle, nuclear, hydroelectric, wind, photovoltaic, and biomass by expanding the GREET model to include power plant construction for these latter systems with literature data. In this way, the GREET model has been expanded to include plant construction, as well as the usual fuel production and consumption stages of power plant life cycles. For the plant construction phase, on a per-megawatt (MW) output basis, conventional power plants in general are found to require less steel and concrete than renewable power systems. With the exception of the concrete requirements for gravity dam hydroelectric, enhanced geothermal and hydrothermal binary used more of these materials per MW than other renewable power-generation systems. Energy and greenhouse gas (GHG) ratios for the infrastructure and other life-cycle stages have also been developed in this study per kilowatt-hour (kWh) of electricity output by taking into account both plant capacity and plant lifetime. Generally, energy burdens per energy output associated with plant infrastructure are higher for renewable systems than conventional ones. GHG emissions per kWh of electricity output for plant construction follow a similar trend. Although some of the renewable systems have GHG emissions during plant operation, they are much smaller than those emitted by fossil fuel thermoelectric systems. Binary geothermal systems have virtually insignificant GHG emissions compared to fossil systems. Taking into account plant construction and operation, the GREET model shows that fossil thermal plants have fossil energy use and GHG emissions per kWh of electricity output about one order of magnitude higher than renewable power systems, including geothermal power.

  17. Updating the Classification of Geothermal Resources- Presentation

    Office of Energy Efficiency and Renewable Energy (EERE)

    USGS is working with DOE, the geothermal industry, and academic partners to develop a new geothermal resource classification system.

  18. Ionic Liquids for Utilization of Geothermal Energy

    Broader source: Energy.gov [DOE]

    DOE Geothermal Program Peer Review 2010 - Presentation. Project objective: to develop ionic liquids for two geothermal energy related applications.

  19. National Geothermal Resource Assessment and Classification |...

    Office of Environmental Management (EM)

    Resource Assessment and Classification National Geothermal Resource Assessment and Classification National Geothermal Resource Assessment and Classification presentation at the...

  20. Rural Cooperative Geothermal Development Electric & Agriculture...

    Broader source: Energy.gov (indexed) [DOE]

    More Documents & Publications Southwest Alaska Regional Geothermal Energy Project District Wide Geothermal Heating Conversion Blaine County School District Novel Energy...

  1. Updating the Classification of Geothermal Resources

    Office of Energy Efficiency and Renewable Energy (EERE)

    USGS is working with DOE, the geothermal industry, and academic partners to develop a new geothermal resource classification system.

  2. Navy Geothermal Plan

    SciTech Connect (OSTI)

    Not Available

    1984-12-01

    Domestic geothermal resources with the potential for decreasing fossil fuel use and energy cost exist at a significant number of Navy facilities. The Geothermal Plan is part of the Navy Energy R and D Program that will evaluate Navy sites and provide a technical, economic, and environmental base for subsequent resource use. One purpose of the program will be to provide for the transition of R and D funded exploratory efforts into the resource development phase. Individual Navy geothermal site projects are described as well as the organizational structure and Navy decision network. 2 figs.

  3. The Geysers Geothermal Field Update1990/2010

    E-Print Network [OSTI]

    Brophy, P.

    2012-01-01

    in  The  Geysers.   Geothermal Resources Council A  planned  Enhanced  Geothermal  System  demonstration project.   Geothermal  Resources  Council  Transactions 33, 

  4. GEOTHERMAL RESERVOIR ENGINEERING MANGEMENT PROGRAM PLAN (GREMP PLAN)

    E-Print Network [OSTI]

    Bloomster, C.H.

    2010-01-01

    2 Mission of Division of Geothermal Energy . . . . .Coordination with Other Geothermal Programs . . . . . . 6the Behavior of Geothermal Systems . . . . . . . . . 1 6

  5. Microhole arrays for improved heat mining from enhanced geothermal systems

    E-Print Network [OSTI]

    Finsterle, S.

    2014-01-01

    from enhanced geothermal systems. Transactions Geothermalapproach to enhanced geothermal systems. Transactionsof the enhanced geothermal system demonstration reservoir in

  6. National Geothermal Academy Underway at University of Nevada...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    aspects of geothermal energy development and utilization. Modules include Geothermal Geology and Geochemistry, Geothermal Geophysics, Reservoir Engineering, and more. The...

  7. Exploring the Raft River geothermal area, Idaho, with the dc...

    Open Energy Info (EERE)

    the dc resistivity method (Abstract) Abstract GEOTHERMAL ENERGY; GEOTHERMAL FIELDS; ELECTRICAL SURVEYS; IDAHO; GEOTHERMAL EXPLORATION; RAFT RIVER VALLEY; ELECTRIC CONDUCTIVITY;...

  8. Microhole arrays for improved heat mining from enhanced geothermal systems

    E-Print Network [OSTI]

    Finsterle, S.

    2014-01-01

    prospects from enhanced geothermal systems. Transactionsapproach to enhanced geothermal systems. Transactionsexperiment of the enhanced geothermal system demonstration

  9. Hot Springs Point Geothermal Project | Open Energy Information

    Open Energy Info (EERE)

    Point Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Hot Springs Point Geothermal Project Project Location Information...

  10. Feature Detection, Characterization and Confirmation Methodology: Final Report

    E-Print Network [OSTI]

    Karasaki, Kenzi

    2009-01-01

    of vertical borehole flow. The geothermal gradient is thegeothermal temperature gradient that is consistent with temperature profiles observed in boreholesgeothermal gradient) Fracture, porosity, lithology Velocity of intact granite, faults and fracture zone fractures, continuity and geometry of features between boreholes

  11. The Geysers Geothermal Field Update1990/2010

    E-Print Network [OSTI]

    Brophy, P.

    2012-01-01

    into  sustainable  geothermal  energy:  The  S.E.   Geysers seismicity and geothermal  energy.  Geothermal Resources into  sustainable  geothermal  energy:  The  S.E.   Geysers 

  12. 3D Magnetotelluic characterization of the Coso Geothermal Field

    E-Print Network [OSTI]

    Newman, Gregory A.; Hoversten, G. Michael; Wannamaker, Philip E.; Gasperikova, Erika

    2008-01-01

    of the Coso Geothermal System, Geothermal Resources Councileast flank of the Coso geothermal system, Proceedings 28 thCreation of an enhanced geothermal system through hydraulic

  13. How an Enhanced Geothermal System Works | Department of Energy

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    an Enhanced Geothermal System Works How an Enhanced Geothermal System Works The Potential Enhanced Geothermal Systems (EGS), also sometimes called engineered geothermal systems,...

  14. The Geysers Geothermal Field Update1990/2010

    E-Print Network [OSTI]

    Brophy, P.

    2012-01-01

    A  planned  Enhanced  Geothermal  System  demonstration associated  with Enhanced  Geothermal Systems.  Geothermics Section 3).   5. Enhanced Geothermal Systems (EGS)  Brown, 

  15. Geothermal Energy: Current abstracts

    SciTech Connect (OSTI)

    Ringe, A.C. (ed.)

    1988-02-01

    This bulletin announces the current worldwide information available on the technologies required for economic recovery of geothermal energy and its use as direct heat or for electric power production. (ACR)

  16. Catalytic Hydrothermal Gasification of Biomass

    SciTech Connect (OSTI)

    Elliott, Douglas C.

    2008-05-06

    A recent development in biomass gasification is the use of a pressurized water processing environment in order that drying of the biomass can be avoided. This paper reviews the research undertaken developing this new option for biomass gasification. This review does not cover wet oxidation or near-atmospheric-pressure steam-gasification of biomass. Laboratory research on hydrothermal gasification of biomass focusing on the use of catalysts is reviewed here, and a companion review focuses on non-catalytic processing. Research includes liquid-phase, sub-critical processing as well as super-critical water processing. The use of heterogeneous catalysts in such a system allows effective operation at lower temperatures, and the issues around the use of catalysts are presented. This review attempts to show the potential of this new processing concept by comparing the various options under development and the results of the research.

  17. Dixie Valley Engineered Geothermal System Exploration Methodology Project, Baseline Conceptual Model Report

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Iovenitti, Joe

    The Engineered Geothermal System (EGS) Exploration Methodology Project is developing an exploration approach for EGS through the integration of geoscientific data. The Project chose the Dixie Valley Geothermal System in Nevada as a field laboratory site for methodlogy calibration purposes because, in the public domain, it is a highly characterized geothermal systems in the Basin and Range with a considerable amount of geoscience and most importantly, well data. This Baseline Conceptual Model report summarizes the results of the first three project tasks (1) collect and assess the existing public domain geoscience data, (2) design and populate a GIS database, and (3) develop a baseline (existing data) geothermal conceptual model, evaluate geostatistical relationships, and generate baseline, coupled EGS favorability/trust maps from +1km above sea level (asl) to -4km asl for the Calibration Area (Dixie Valley Geothermal Wellfield) to identify EGS drilling targets at a scale of 5km x 5km. It presents (1) an assessment of the readily available public domain data and some proprietary data provided by Terra-Gen Power, LLC, (2) a re-interpretation of these data as required, (3) an exploratory geostatistical data analysis, (4) the baseline geothermal conceptual model, and (5) the EGS favorability/trust mapping. The conceptual model presented applies to both the hydrothermal system and EGS in the Dixie Valley region.

  18. Dixie Valley Engineered Geothermal System Exploration Methodology Project, Baseline Conceptual Model Report

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Iovenitti, Joe

    2013-05-15

    The Engineered Geothermal System (EGS) Exploration Methodology Project is developing an exploration approach for EGS through the integration of geoscientific data. The Project chose the Dixie Valley Geothermal System in Nevada as a field laboratory site for methodlogy calibration purposes because, in the public domain, it is a highly characterized geothermal systems in the Basin and Range with a considerable amount of geoscience and most importantly, well data. This Baseline Conceptual Model report summarizes the results of the first three project tasks (1) collect and assess the existing public domain geoscience data, (2) design and populate a GIS database, and (3) develop a baseline (existing data) geothermal conceptual model, evaluate geostatistical relationships, and generate baseline, coupled EGS favorability/trust maps from +1km above sea level (asl) to -4km asl for the Calibration Area (Dixie Valley Geothermal Wellfield) to identify EGS drilling targets at a scale of 5km x 5km. It presents (1) an assessment of the readily available public domain data and some proprietary data provided by Terra-Gen Power, LLC, (2) a re-interpretation of these data as required, (3) an exploratory geostatistical data analysis, (4) the baseline geothermal conceptual model, and (5) the EGS favorability/trust mapping. The conceptual model presented applies to both the hydrothermal system and EGS in the Dixie Valley region.

  19. Geothermal Energy Retrofit

    SciTech Connect (OSTI)

    Bachman, Gary

    2015-07-28

    The Cleary University Geothermal Energy Retrofit project involved: 1. A thermal conductivity test; 2. Assessment of alternative horizontal and vertical ground heat exchanger options; 3. System design; 4. Asphalt was stripped from adjacent parking areas and a vertical geothermal ground heat exchanger system installed; 5. the ground heat exchanger was connected to building; 6. a system including 18 heat pumps, control systems, a manifold and pumps, piping for fluid transfer and ductwork for conditioned air were installed throughout the building.

  20. Geothermal | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center HomeVehicle Replacement U.S.Job VacanciesGeothermal Geothermal EERE

  1. Geothermal | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data CenterFinancial Opportunities FinancialofInformation Geothermal Geothermal

  2. Development of Models to Simulate Tracer Behavior in Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Williams, Mark D.; Vermeul, Vincent R.; Reimus, P. W.; Newell, D.; Watson, Tom B.

    2010-06-01

    A recent report found that power and heat produced from engineered (or enhanced) geothermal systems (EGSs) could have a major impact on the United States while incurring minimal environmental impacts. EGS resources differ from high-grade hydrothermal resources in that they lack sufficient temperature distributions, permeability/porosity, fluid saturation, or recharge of reservoir fluids. Therefore, quantitative characterization of temperature distributions and the surface area available for heat transfer in EGS is necessary for commercial development of geothermal energy. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate this characterization. Modeling capabilities are being developed as part of this project to support laboratory and field testing to characterize engineered geothermal systems in single- and multi-well tests using tracers. The objective of this report is to describe the simulation plan and the status of model development for simulating tracer tests for characterizing EGS.

  3. Analysis of Injection-Induced Micro-Earthquakes in a Geothermal Steam Reservoir, The Geysers Geothermal Field, California

    E-Print Network [OSTI]

    Rutqvist, J.

    2008-01-01

    Geothermal Field, Monograph on The Geysers GeothermalField, Geothermal Resources Council, Special Report no. 17,Subsidence at The Geysers geothermal field, N. California

  4. The Krafla Geothermal System. A Review of Geothermal Research...

    Open Energy Info (EERE)

    The Krafla Geothermal System. A Review of Geothermal Research and Revision of the Conceptual Model Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: The...

  5. The National Geothermal Collaborative, EERE-Geothermal Program, Final Report

    SciTech Connect (OSTI)

    Jody Erikson

    2006-05-26

    Summary of the work conducted by the National Geothermal Collaborative (a consensus organization) to identify impediments to geothermal development and catalyze events and dialogues among stakeholders to over those impediments.

  6. Why geothermal energy? Geothermal utilization in the Philippines

    SciTech Connect (OSTI)

    Gazo, F.M.

    1997-12-31

    This paper discusses the advantages of choosing geothermal energy as a resource option in the Philippine energy program. The government mandates the full-scale development of geothermal energy resources to meet increased power demand brought by rapid industrialization and economic growth, and to reduce fossil fuel importation. It also aims to realize these additional geothermal capacities by tapping private sector investments in the exploration, development, exploitation, construction, operation and management of various geothermal areas in the country.

  7. track 4: enhanced geothermal systems (EGS) | geothermal 2015...

    Broader source: Energy.gov (indexed) [DOE]

    Office portfolio presented fifty three technical project presentations on enhanced geothermal systems technologies (EGS). EGS technologies utilize directional drilling and...

  8. Biomass reforming processes in hydrothermal media

    E-Print Network [OSTI]

    Peterson, Andrew A

    2009-01-01

    While hydrothermal technologies offer distinct advantages in being able to process a wide variety of biomass feedstocks, the composition of the feedstock will have a large effect on the processing employed. This thesis ...

  9. Snake River Geothermal Project- Innovative Approaches to Geothermal Exploration

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Project objective: To Implement and Test Geological and Geophysical Techniques for Geothermal Exploration. Project seeks to lower the cost of geothermal energy development by identifying which surface and borehole techniques are most efficient at identifying hidden resources.

  10. GEOTHERMAL SUBSIDENCE RESEARCH PROGRAM PLAN

    E-Print Network [OSTI]

    Lippmann, Marcello J.

    2010-01-01

    of Subsiding Areas and Geothermal Subsidence Potential25 Project l-Subsidence Case Histories . . . . . . . . . .8 . Subsidence Models . . . . . . . . . . . . . . . .

  11. Accelerating Geothermal Research (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-05-01

    Geothermal research at the National Renewable Energy Laboratory (NREL) is advancing geothermal technologies to increase renewable power production. Continuous and not dependent on weather, the geothermal resource has the potential to jump to more than 500 gigawatts in electricity production, which is equivalent to roughly half of the current U.S. capacity. Enhanced geothermal systems have a broad regional distribution in the United States, allowing the potential for development in many locations across the country.

  12. SMU Geothermal Conference 2011 - Geothermal Technologies Program

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo. 195 -Rob Robertseere.energy.gov Timothy Reinhardt Geothermal

  13. Life Cycle Water Consumption and Water Resource Assessment for Utility-Scale Geothermal Systems: An In-Depth Analysis of Historical and Forthcoming EGS Projects

    SciTech Connect (OSTI)

    Clark, Corrie E.; Harto, Christopher B.; Schroeder, Jenna N.; Martino, Louis E.; Horner, Robert M.

    2013-11-05

    This report is the third in a series of reports sponsored by the U.S. Department of Energy Geothermal Technologies Program in which a range of water-related issues surrounding geothermal power production are evaluated. The first report made an initial attempt at quantifying the life cycle fresh water requirements of geothermal power-generating systems and explored operational and environmental concerns related to the geochemical composition of geothermal fluids. The initial analysis of life cycle fresh water consumption of geothermal power-generating systems identified that operational water requirements consumed the vast majority of water across the life cycle. However, it relied upon limited operational water consumption data and did not account for belowground operational losses for enhanced geothermal systems (EGSs). A second report presented an initial assessment of fresh water demand for future growth in utility-scale geothermal power generation. The current analysis builds upon this work to improve life cycle fresh water consumption estimates and incorporates regional water availability into the resource assessment to improve the identification of areas where future growth in geothermal electricity generation may encounter water challenges. This report is divided into nine chapters. Chapter 1 gives the background of the project and its purpose, which is to assess the water consumption of geothermal technologies and identify areas where water availability may present a challenge to utility-scale geothermal development. Water consumption refers to the water that is withdrawn from a resource such as a river, lake, or nongeothermal aquifer that is not returned to that resource. The geothermal electricity generation technologies evaluated in this study include conventional hydrothermal flash and binary systems, as well as EGSs that rely on engineering a productive reservoir where heat exists, but where water availability or permeability may be limited. Chapter 2 describes the approach and methods for this work and identifies the four power plant scenarios evaluated: a 20-MW EGS binary plant, a 50-MW EGS binary plant, a 10-MW hydrothermal binary plant, and a 50-MW hydrothermal flash plant. The methods focus on (1) the collection of data to improve estimation of EGS stimulation volumes, aboveground operational consumption for all geothermal technologies, and belowground operational consumption for EGS; and (2) the mapping of the geothermal and water resources of the western United States to assist in the identification of potential water challenges to geothermal growth. Chapters 3 and 4 present the water requirements for the power plant life cycle. Chapter 3 presents the results of the current data collection effort, and Chapter 4 presents the normalized volume of fresh water consumed at each life cycle stage per lifetime energy output for the power plant scenarios evaluated. Over the life cycle of a geothermal power plant, from construction through 30 years of operation, the majority of water is consumed by plant operations. For the EGS binary scenarios, where dry cooling was assumed, belowground operational water loss is the greatest contributor depending upon the physical and operational conditions of the reservoir. Total life cycle water consumption requirements for air-cooled EGS binary scenarios vary between 0.22 and 1.85 gal/kWh, depending upon the extent of belowground operational water consumption. The air-cooled hydrothermal binary and flash plants experience far less fresh water consumption over the life cycle, at 0.04 gal/kWh. Fresh water requirements associated with air- cooled binary operations are primarily from aboveground water needs, including dust control, maintenance, and domestic use. Although wet-cooled hydrothermal flash systems require water for cooling, these plants generally rely upon the geofluid, fluid from the geothermal reservoir, which typically has high salinity and total dissolved solids concentration and is much warmer than normal groundwater sources, for their cooling water needs; thus,

  14. HIGH TEMPERATURE GEOTHERMAL RESERVOIR ENGINEERING

    E-Print Network [OSTI]

    Schroeder, R.C.

    2009-01-01

    on the Cerro P r i e t o Geothermal F i e l d , Mexicali,e C e r r o P r i e t o Geothermal F i e l d , Baja C a l i1979 HIGH TEMPERATURE GEOTHERMAL RESERVOIR ENGINEERING R.

  15. Postgraduate Certificate in Geothermal Energy

    E-Print Network [OSTI]

    Auckland, University of

    Postgraduate Certificate in Geothermal Energy Technology The University of Auckland The University for development of geothermal fields is large and many countries are seeking to move away from fossil fuel power generation for both economic and environmental reasons. Global revenues for geothermal power were estimated

  16. GEOTHERMAL ENERGY DEVELOPMENT Paul Kruger

    E-Print Network [OSTI]

    Stanford University

    SGP-TR 9 * GEOTHERMAL ENERGY DEVELOPMENT Paul Kruger C i v i l Engineering Department Stanford on an aggressive program t o develop its indigenous resources of geothermal energy. For more than a decade, geothermal energy has been heralded as one of the more promising forms of energy a l t e r n a t e t o o i l

  17. DOWNHOLE ENTHALPY MEASUREMENT IN GEOTHERMAL

    E-Print Network [OSTI]

    Stanford University

    SGP-TR-186 DOWNHOLE ENTHALPY MEASUREMENT IN GEOTHERMAL WELLS WITH FIBER OPTICS Nilufer Atalay June 2008 Financial support was provided through the Stanford Geothermal Program under Idaho National University Stanford Geothermal Program Interdisciplinary Research in Engineering and Earth Sciences STANFORD

  18. STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY

    E-Print Network [OSTI]

    Stanford University

    STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY STANFORD, CALIFORNIA 94305 SGP-TR-42 PROCEEDINGS SPECIAL PANEL ON GEOTHERMAL MODEL INTERCOMPARISON STUDY held in conjunction with The Code Comparison Contracts issued by Department of Energy Division of Geothermal Energy San Francisco Operations Office

  19. Stanford Geothermal Program Tnterdisciplinary Research

    E-Print Network [OSTI]

    Stanford University

    Stanford Geothermal Program Tnterdisciplinary Research in Engineering and Earth Sciences Stanford University Stanford, California A LABORATORY MODEL OF STWLATED GEOTHERMAL RESERVOIRS by A. Hunsbedt P. Kruger created by artificial stimulation of geothermal reservoirs has been con- structed. The model has been used

  20. STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY

    E-Print Network [OSTI]

    Stanford University

    STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY STANFORD, CALIFORNIA 94305 SGP-TR-35 SECOND ANNUAL #12;INTRODUCTION The research e f f o r t of t h e Stanford Geothermal Program is focused on geothermal reservoir engineering. The major o b j e c t i v e of t h e protiram is t o develop techniques f o

  1. Stanford Geothermal Program Stanford University

    E-Print Network [OSTI]

    Stanford University

    s Stanford Geothermal Program Stanford University Stanford, California RADON MEASUEMENTS I N GEOTHERMAL SYSTEMS ? d by * ** Alan K. Stoker and Paul Kruger SGP-TR-4 January 1975 :: raw at Lcs Alams S c i and water, o i l and n a t u r a l gas wells. with radon i n geothermal reservoirs. Its presence i n

  2. Stanford Geothermal Program Final Report

    E-Print Network [OSTI]

    Stanford University

    Stanford Geothermal Program Final Report July 1996 - June 1999 Funded by the U.S. Department of Energy under grant number DE-FG07-95ID13370 Stanford Geothermal Program Department of Petroleum ....................................................................................................................6 2. THE ROLE OF CAPILLARY FORCES IN THE NATURAL STATE OF FRACTURED GEOTHERMAL RESERVOIRS

  3. EA-1676: U.S. Geothermal's Neal Hot Springs Geothermal Facility...

    Office of Environmental Management (EM)

    76: U.S. Geothermal's Neal Hot Springs Geothermal Facility in Vale, OR EA-1676: U.S. Geothermal's Neal Hot Springs Geothermal Facility in Vale, OR December 1, 2009 EA-1676: Final...

  4. Geothermal Program Review VI: proceedings. Beyond goals and objectives

    SciTech Connect (OSTI)

    Not Available

    1988-01-01

    Program Review VI was comprised of six sessions, including an opening session, four technical sessions that addressed each of the major DOE research areas, and a session on special issues. The technical sessions were on Hydrothermal, Hot Dry Rock, Geopressured and Magma resources. Presenters in the technical sessions discussed their R and D activities within the context of specific GTD Programmatic Objectives for that technology, their progress toward achieving those objectives, and the value of those achievements to industry. The ''Special Issues'' presentations addressed several topics such as the interactions between government and industry on geothermal energy R and D; the origin and basis for the programmatic objectives analytical computer model; and international marketing opportunities for US geothermal equipment and services. The unique aspect of Program Review VI was that it was held in conjunction with the National Geothermal Association's Industry Round Table on Federal R and D. The Round Table provided a forum for open and lively discussions between industry and government researchers and gave industry an opportunity to convey their needs and perspectives on DOE's research programs. These discussions also provided valuable information to DOE regarding industry's priorities and directions.

  5. STATUS OF GEOTHERMAL RESERVOIR ENGINEERING MANAGEMENT PROGRAM ("GREMP") -DECEMBER, 1979

    E-Print Network [OSTI]

    Howard, J. H.

    2012-01-01

    DOE), Division of Geothermal Energy (DGE) proposed thatof Energy, Division of Geothermal Energy, through Lawrence

  6. State Geothermal Resource Assessment and Data Collection Efforts

    Office of Energy Efficiency and Renewable Energy (EERE)

    HawaiiNational Geothermal Data System Aids in Discovering Hawaii's Geothermal Resource (November 20, 2012)

  7. Enhanced Geothermal Systems Technologies

    Broader source: Energy.gov [DOE]

    Geothermal Energy an?d the Enhanced Geothermal Systems Concept The Navy 1 geothermal power plant near Coso Hot Springs, California, is applying EGS technology. Heat is naturally present everywhere in the earth. For all intents and purposes, heat from the earth is inexhaustible. Water is not nearly as ubiquitous in the earth as heat. Most aqueous fluids are derived from surface waters that have percolated into the earth along permeable pathways such as faults. Permeability is a measure of the ease of fluid flow through rock. The permeability of rock results from pores, fractures, joints, faults, and other openings which allow fluids to move. High permeability implies that fluids can flow rapidly through the rock. Permeability and, subsequently, the amount of fluids tend to decrease with depth as openings in the rocks compress from the weight of the overburden.

  8. Geothermal Plant Capacity Factors

    SciTech Connect (OSTI)

    Greg Mines; Jay Nathwani; Christopher Richard; Hillary Hanson; Rachel Wood

    2015-01-01

    The capacity factors recently provided by the Energy Information Administration (EIA) indicated this plant performance metric had declined for geothermal power plants since 2008. Though capacity factor is a term commonly used by geothermal stakeholders to express the ability of a plant to produce power, it is a term frequently misunderstood and in some instances incorrectly used. In this paper we discuss how this capacity factor is defined and utilized by the EIA, including discussion on the information that the EIA requests from operations in their 923 and 860 forms that are submitted both monthly and annually by geothermal operators. A discussion is also provided regarding the entities utilizing the information in the EIA reports, and how those entities can misinterpret the data being supplied by the operators. The intent of the paper is to inform the facility operators as the importance of the accuracy of the data that they provide, and the implications of not providing the correct information.

  9. GEOTHERMAL HEAT PUMPS Jack DiEnna

    E-Print Network [OSTI]

    GEOTHERMAL HEAT PUMPS THE "PLAYBOOK" Jack DiEnna Executive Director The Geothermal National What do we call it... Geothermal, Ground Source, GeoExchange. The feds call it geothermal heat pumps IS GEOTHERMAL HEAT PUMP TECHNOLOGY ??? Answer: It is a 60 year old technology! #12;FACT GHP's were first written

  10. 2008 Geothermal Technologies Market Report

    SciTech Connect (OSTI)

    Cross, J.; Freeman, J.

    2009-07-01

    This report describes market-wide trends for the geothermal industry throughout 2008 and the beginning of 2009. It begins with an overview of the U.S. DOE's Geothermal Technology Program's (GTP's) involvement with the geothermal industry and recent investment trends for electric generation technologies. The report next describes the current state of geothermal power generation and activity within the United States, costs associated with development, financing trends, an analysis of the levelized cost of energy (LCOE), and a look at the current policy environment. The report also highlights trends regarding direct use of geothermal energy, including geothermal heat pumps (GHPs). The final sections of the report focus on international perspectives, employment and economic benefits from geothermal energy development, and potential incentives in pending national legislation.

  11. Basement Structure and Implications for Hydrothermal Circulation...

    Open Energy Info (EERE)

    than along the axis of a single dike. Gravity modeling and subsurface data from deep geothermal wells indicate that the floor of the caldera is segmented into a number of...

  12. Geothermal Energy; (USA)

    SciTech Connect (OSTI)

    Raridon, M.H.; Hicks, S.C. (eds.)

    1991-01-01

    Geothermal Energy (GET) announces on a bimonthly basis the current worldwide information available on the technologies required for economic recovery of geothermal energy and its use as direct heat or for electric power production. This publication contains the abstracts of DOE reports, journal article, conference papers, patents, theses, and monographs added to the Energy Science and Technology Database (EDB) during the past two months. Also included are US information obtained through acquisition programs or interagency agreements and international information obtained through the International Energy Agency's Energy Technology Data Exchange or government-to-government agreements.

  13. The Effects of Hydrothermal Agingon a Commercial Cu SCR Catalyst...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Hydrothermal Agingon a Commercial Cu SCR Catalyst Examines the effect of hydrothermal aging on the Nox reduction over a commercial Cu-zeolite SCR catalyst. deer11lee.pdf More...

  14. Application of a New Structural Model & Exploration Technologies to Define a Blind Geothermal System: A Viable Alternative to Grid Drilling for Geothermal Exploration: McCoy, Churchill County, NV

    Broader source: Energy.gov [DOE]

    DOE Geothermal Technologies Peer Review 2010 - Presentation. Relevance of research: Improve exploration technologies for range-hosted geothermal systems:Employ new concept models and apply existing methods in new ways; Breaking geothermal exploration tasks into new steps, segmenting the problem differently; Testing new models for dilatent structures; Utilizing shallow thermal aquifer model to focus exploration; Refining electrical interpretation methods to map shallow conductive featuresIdentifying key faults as fluid conduits; and Employ soil gas surveys to detect volatile elements and gases common to geothermal systems.

  15. Tecuamburro Volcano, Guatemala geothermal gradient core hole drilling, operations, and preliminary results

    SciTech Connect (OSTI)

    Goff, S.; Heiken, G.; Goff, F.; Gardner, J. (Los Alamos National Lab., NM (USA)); Duffield, W. (Geological Survey, Flagstaff, AZ (USA)); Martinelli, L.; Aycinena, S. (Swissboring Overseas Corp. Ltd., Guatemala City (Guatemala)); Castaneda, O. (Unidad de Desarrollo Geotermico, Guatemala City (Guatemala). Inst. Nacional de Electrificacion)

    1990-01-01

    A geothermal gradient core hole (TCB-1) was drilled to a depth of 700+ m at the Tecuamburro geothermal site, Guatemala during February and March, 1990. The core hole is located low on the northern flank of the Tecuamburro Volcano complex. Preliminary analysis of cores (>98% core recovery) indicates that the hydrothermal system may be centered in the 4-km-diameter Chupadero Crater, which has been proposed as the source of pyroxene pumice deposits in the Tecuamburro area. TCB-1 is located 300 m south of a 300-m-diameter phreatic crater, Laguna Ixpaco; the core hole penetrates the thin edge of a tuff ring surrounding Ixpaco and zones of hydrothermal brecciation within the upper 150 m may be related to the phreatic blast, dated at 2,910 {sup 14}C years. At the time of this writing, the unequilibrated temperature at a depth of 570m was 180{degree}C. Data on fracturing, permeability, hydrothermal alteration, and temperature will be presented. 3 refs., 3 figs.

  16. Isotopic Constraints on the Chemical Evolution of Geothermal Fluids, Long Valley, CA

    SciTech Connect (OSTI)

    Brown, Shaun; Kennedy, Burton; DePaolo, Donald; Evans, William

    2008-08-01

    A spatial survey of the chemical and isotopic composition of fluids from the Long Valley hydrothermal system was conducted. Starting at the presumed hydrothermal upwelling zone in the west moat of the caldera, samples were collected from the Casa Diablo geothermal field and a series of monitoring wells defining a nearly linear, ~;;14 km long, west-to-east trend along the proposed fluid flow path (Sorey et al., 1991). Samples were analyzed for the isotopes of water, Sr, Ca, and noble gases, the concentrations of major cations and anions and total CO2. Our data confirm earlier models in which the variations in water isotopes along the flow path reflect mixing of a single hydrothermal fluid with local groundwater. Variations in Sr data are poorly constrained and reflect fluid mixing, multiple fluid-pathways or water-rock exchange along the flow path as suggested by Goff et al. (1991). Correlated variations among total CO2, noble gases and the concentration and isotopic composition of Ca suggest progressive fluid degassing (loss of CO2, noble gases) driving calcite precipitation as the fluid flows west-to-east across the caldera. This is the first evidence that Ca isotopes may trace and provide definitive evidence of calcite precipitation along fluid flow paths in geothermal systems.

  17. The role of convective geothermal systems in the generation, migration, and entrapment of oil

    SciTech Connect (OSTI)

    Hulen, J.B. [Univ. of Utah Research Institute, Salt Lake City, UT (United States)

    1995-06-01

    Modern convective geothermal systems (for example, at Yellowstone National Park) and their fossil equivalents, epithermal mineral deposits (like McLaughlin, California) have traditionally been considered poor petroleum prospects. The concentrated heat which drives these systems is commonly viewed as a negative influence: in other words, any oil initially present in or generated by these systems is quickly degraded to a useless carbonaceous residue. This is true in extreme cases, but numerous examples from the Great Basin, the northern California Coast Ranges, and elsewhere suggest that under certain circumstances, geothermal systems can efficiently generate, transport, and entrap significant quantities of producible petroleum. B.R.T. Simoneit has shown that oil can be hydrothermally generated in an {open_quotes} instant{close_quotes} of geologic time. It follows, then, that away from geothermal systems` high-temperature centers (or in wholly moderate-temperature systems), the encompassing shallow thermal anomalies can distill large volumes of oil from otherwise immature hydrocarbon source rocks. Transport of this newly-generated oil is enhanced by the buoyant upwelling of heated aqueous fluid. Porosity for oil transport and storage is created or increased by hydrothermal dissolution of rock-forming or secondary silicates and carbonates. Finally, geothermal {open_quotes}self-sealing{close_quotes} -- the deposition of secondary minerals (especially silica and clay) at the margins of a system -- can provide a very effective hydrocarbon seal. Lee Allison has noted the coincidence of igneous intrusions and oil reservoirs in Nevada. It is suggested that here and elsewhere, both igneous-related and amagmatic geothermal systems in otherwise favorable settings should be viewed as prime petroleum exploration targets.

  18. Calibrated Hydrothermal Parameters, Barrow, Alaska, 2013

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Atchley, Adam; Painter, Scott; Harp, Dylan; Coon, Ethan; Wilson, Cathy; Liljedahl, Anna; Romanovsky, Vladimir

    A model-observation-experiment process (ModEx) is used to generate three 1D models of characteristic micro-topographical land-formations, which are capable of simulating present active thaw layer (ALT) from current climate conditions. Each column was used in a coupled calibration to identify moss, peat and mineral soil hydrothermal properties to be used in up-scaled simulations. Observational soil temperature data from a tundra site located near Barrow, AK (Area C) is used to calibrate thermal properties of moss, peat, and sandy loam soil to be used in the multiphysics Advanced Terrestrial Simulator (ATS) models. Simulation results are a list of calibrated hydrothermal parameters for moss, peat, and mineral soil hydrothermal parameters.

  19. The BGU/CERN solar hydrothermal reactor

    E-Print Network [OSTI]

    Bertolucci, Sergio; Caspers, Fritz; Garb, Yaakov; Gross, Amit; Pauletta, Stefano

    2014-01-01

    We describe a novel solar hydrothermal reactor (SHR) under development by Ben Gurion University (BGU) and the European Organization for Nuclear Research CERN. We describe in broad terms the several novel aspects of the device and, by extension, of the niche it occupies: in particular, enabling direct off-grid conversion of a range of organic feedstocks to sterile useable (solid, liquid) fuels, nutrients, products using only solar energy and water. We then provide a brief description of the high temperature high efficiency panels that provide process heat to the hydrothermal reactor, and review the basics of hydrothermal processes and conversion taking place in this. We conclude with a description of a simulation of the pilot system that will begin operation later this year.

  20. Calibrated Hydrothermal Parameters, Barrow, Alaska, 2013

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Atchley, Adam; Painter, Scott; Harp, Dylan; Coon, Ethan; Wilson, Cathy; Liljedahl, Anna; Romanovsky, Vladimir

    2015-01-29

    A model-observation-experiment process (ModEx) is used to generate three 1D models of characteristic micro-topographical land-formations, which are capable of simulating present active thaw layer (ALT) from current climate conditions. Each column was used in a coupled calibration to identify moss, peat and mineral soil hydrothermal properties to be used in up-scaled simulations. Observational soil temperature data from a tundra site located near Barrow, AK (Area C) is used to calibrate thermal properties of moss, peat, and sandy loam soil to be used in the multiphysics Advanced Terrestrial Simulator (ATS) models. Simulation results are a list of calibrated hydrothermal parameters for moss, peat, and mineral soil hydrothermal parameters.

  1. MODELING SUBSIDENCE DUE TO GEOTHERMAL FLUID PRODUCTION

    E-Print Network [OSTI]

    Lippmann, M.J.

    2011-01-01

    Applications o f Geothermal Energy and t h e i r Place i n tcompaction, computers, geothermal energy, pore-waterf o r developing geothermal energy i n the United States (

  2. MULTIPARAMETER OPTIMIZATION STUDIES ON GEOTHERMAL ENERGY CYCLES

    E-Print Network [OSTI]

    Pope, W.L.

    2011-01-01

    and J. W. Tester, Geothermal Energy as a Source of Electricat the Susanville Geothermal Energy Converence, July 1976.and J. W. Tester, Geothermal Energy as a Source of Electric

  3. Induced seismicity associated with enhanced geothermal system

    E-Print Network [OSTI]

    Majer, Ernest L.

    2006-01-01

    Hill hot dry rock geothermal energy site, New Mexico. Int J.No. 1. In: Geopressured-Geothermal Energy, 105, Proc. 5thCoast Geopressured-Geothermal Energy Conf. (Bebout, D.G. ,

  4. SEISMOLOGICAL INVESTIGATIONS AT THE GEYSERS GEOTHERMAL FIELD

    E-Print Network [OSTI]

    Majer, E. L.

    2011-01-01

    P. Muffler, 1972. The Geysers Geothermal Area, California.B. C. Hearn, 1977. ~n Geothermal Prospecting Geology, TheC. , 1968. of the Salton Sea Geothermal System. pp. 129-166.

  5. NATIONAL GEOTHERMAL INFORMATION RESOURCE ANNUAL REPORT, 1977

    E-Print Network [OSTI]

    Phillips, Sidney L.

    2012-01-01

    Schwartz, Oct: 1977. "Geothermal Aspects o f Hydrogen Sul 4.S.R. Schwartz, "Review o f Geothermal Subsidence", LBL-3220,k i l e d to over 200 geothermal specialists i n 1977. Over

  6. SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL

    E-Print Network [OSTI]

    Narasimhan, T.N.

    2013-01-01

    of Geothermal Resources, Pisa, v. 2, p. 99-109. Browne,of Geothermal Resources, Pisa, v. 2, p. 287-294. Sageev,Use of Geothermal Resources, Pisa, 1970, v. 2, p. 564-570.

  7. ANNOTATED RESEARCH BIBLIOGRAPHY FOR GEOTHERMAL RESERVOIR ENGINEERING

    E-Print Network [OSTI]

    Sudo!, G.A

    2012-01-01

    i o n o f Geothermal Resources. Pisa, Sept. 22-Oct. 1, 1970:n o f Geothermal Resources. Pisa, Sept. 22-Oct. 1 1970: 516-o f Geothermal Resources, Pisa, Sept. 22-Oct. 1 1970: .1440-

  8. MODELING SUBSIDENCE DUE TO GEOTHERMAL FLUID PRODUCTION

    E-Print Network [OSTI]

    Lippmann, M.J.

    2011-01-01

    t al. , "Modeling Geothermal Systems," A t t i dei Convegnio f L i q u i d Geothermal Systems," Open-File Report 75-i q u i d Dominated Geothermal Systems," Proceedings o f t h

  9. ANNOTATED RESEARCH BIBLIOGRAPHY FOR GEOTHERMAL RESERVOIR ENGINEERING

    E-Print Network [OSTI]

    Sudo!, G.A

    2012-01-01

    Phenomena i n Geothermal Systems. I' U.N. Symposium on theModeling o f Geothermal Systems." 2nd U.N. Symposium on theassociations of geothermal systems and postulates on a

  10. Potential of geothermal energy in China

    E-Print Network [OSTI]

    Sung, Peter On

    2010-01-01

    This thesis provides an overview of geothermal power generation and the potential for geothermal energy utilization in China. Geothermal energy is thermal energy stored in the earth's crust and currently the only ubiquitously ...

  11. Geothermal Technologies Program Blue Ribbon Panel Recommendations

    Broader source: Energy.gov [DOE]

    This report describes the recommendations of the Geothermal Blue Ribbon Panel, a panel of geothermal experts assembled in March 2011 for a discussion on the future of geothermal energy in the U.S.

  12. Geothermal Technologies Office Hosts Collegiate Competition

    Office of Energy Efficiency and Renewable Energy (EERE)

    To further accelerate the adoption of geothermal energy, the United States Department of Energy is sponsoring a Geothermal Case Study Challenge (CSC) to aggregate geothermal data that can help us...

  13. Selling Geothermal Systems The "Average" Contractor

    E-Print Network [OSTI]

    Selling Geothermal Systems #12;The "Average" Contractor · History of sales procedures · Manufacturer Driven Procedures · What makes geothermal technology any harder to sell? #12;"It's difficult to sell a geothermal system." · It should

  14. THERMO-HYDRO-MECHANICAL SIMULATION OF GEOTHERMAL

    E-Print Network [OSTI]

    Politècnica de Catalunya, Universitat

    Seminario del Grupo de Hidrologìa Subterrànea - UPC, Barcelona #12;INTRODUCTION Enhanced geothermal systems Geothermal gradient ~ 33 °C/Km Hydraulic stimulation enhances fracture permeability (energyTHERMO-HYDRO-MECHANICAL SIMULATION OF GEOTHERMAL RESERVOIR STIMULATIONRESERVOIR STIMULATION Silvia

  15. Life-Cycle Analysis Results of Geothermal Systems in Comparison...

    Broader source: Energy.gov (indexed) [DOE]

    hydrothermal flash, and hydrothermal binary technologies. lifecycleanalysisofgeothermalsystemsdraft.pdf More Documents & Publications Life-Cycle Analysis Results of...

  16. Life-Cycle Analysis Results of Geothermal Systems in Comparison...

    Broader source: Energy.gov (indexed) [DOE]

    hydrothermal flash, and hydrothermal binary technologies. lifecycleanalysisofgeothermalsystems.pdf More Documents & Publications Life-Cycle Analysis Results of...

  17. Effects of glacial ice on subsurface temperatures of hydrothermal systems in Yellowstone National Park, Wyoming: Fluid-inclusion evidence

    SciTech Connect (OSTI)

    Bargar, K.E.; Fournier, R.O. (Geological Survey, Menlo Park, CA (USA))

    1988-12-01

    Hydrothermal quartz and fluorite crystals containing liquid-rich fluid inclusions (coexisting vapor-rich fluid inclusions were not observed) were found in drill cores from eight relatively shallow research holes drilled by the US Geological Survey in and near major geyser basins of Yellowstone National Park. Homogenization temperatures (T{sub h}) for mostly secondary fluid inclusions show variations in temperature that have occurred at give depths since precipitation of the host minerals. Within major hydrothermal upflow zones, fluid-inclusion T{sub h} values all were found to be equal to or higher (commonly 20-50 C and up to 155 C higher) than present temperatures at the depths sampled. During periods when thick glacial ice covered the Yellowstone National Park region, pore-fluid pressures in the underlying rock were increased in proportion to the weight of the overlying column of ice. Accordingly, theoretical reference boiling-point curves that reflect the maximum temperature attainable in a hot-water geothermal system at a given depth were elevated, and temperatures within zones of major hydrothermal upflow (drill holes Y-2, Y-3, Y-6, Y-11, Y-13, and upper part of Y-5) increased. The thicknesses of ice required to elevate boiling-point curves sufficiently to account for the observed fluid-inclusion T{sub h} values are within the ranges estimated by glacial geologic studies. At the margins of major hydrothermal upflow zones (drill holes Y-4 and Y-9), fluid-inclusion T{sub h} values at given depths range from 57 C lower to about the same as the current temperature measurements because of a previous decrease in the rate of discharge of warm water and/or an increase in the rate of recharge of cold water into the hydrothermal system.

  18. National Geothermal Data System (NGDS)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The National Geothermal Data System (NGDS) is a DOE-funded distributed network of databases and data sites. Much of the risk of geothermal energy development is associated with exploring for, confirming and characterizing the available geothermal resources. The overriding purpose of the NGDS is to help mitigate this up-front risk by serving as a central gateway for geothermal and relevant related data as well as a link to distributed data sources. Assessing and categorizing the nation's geothermal resources and consolidating all geothermal data through a publicly accessible data system will support research, stimulate public interest, promote market acceptance and investment, and, in turn, the growth of the geothermal industry. Major participants in the NGDS to date include universities, laboratories, the Arizona Geological Survey and Association of American State Geologists (Arizona Geological Survey, lead), the Geothermal Resources Council, and the U.S. Geological Survey. The Geothermal Energy Association is collaborating with the NGDS to insure that it meets the needs of the geothermal industry.

  19. Tracing Geothermal Fluids

    SciTech Connect (OSTI)

    Michael C. Adams Greg Nash

    2004-03-31

    Chemical compounds have been designed under this contract that can be used to trace water that has been injected into vapor-dominated and two-phase geothermal fields. Increased knowledge of the injection flow is provided by the tracers, and this augments the power that can be produced. Details on the stability and use of these tracers are included in this report.

  20. Energy 101: Geothermal Energy

    ScienceCinema (OSTI)

    None

    2014-06-23

    See how we can generate clean, renewable energy from hot water sources deep beneath the Earth's surface. The video highlights the basic principles at work in geothermal energy production, and illustrates three different ways the Earth's heat can be converted into electricity.

  1. Geothermal Heat Pump Basics

    Broader source: Energy.gov [DOE]

    Geothermal heat pumps use the constant temperature of the earth as an exchange medium for heat. Although many parts of the country experience seasonal temperature extremes—from scorching heat in the summer to sub-zero cold in the winter—the ground a few feet below the earth's surface remains at a relatively constant temperature.

  2. Reinjection into geothermal reservoirs

    SciTech Connect (OSTI)

    Bodvarsson, G.S.; Stefansson, V.

    1987-08-01

    Reinjection of geothermal wastewater is practiced as a means of disposal and for reservoir pressure support. Various aspects of reinjection are discussed, both in terms of theoretical studies as well as specific field examples. The discussion focuses on the major effects of reinjection, including pressure maintenance and chemical and thermal effects. (ACR)

  3. Energy 101: Geothermal Energy

    SciTech Connect (OSTI)

    2014-05-27

    See how we can generate clean, renewable energy from hot water sources deep beneath the Earth's surface. The video highlights the basic principles at work in geothermal energy production, and illustrates three different ways the Earth's heat can be converted into electricity.

  4. Ninth workshop on geothermal reservoir engineering: Proceedings

    SciTech Connect (OSTI)

    Ramey, H.J. Jr.; Kruger, P.; Miller, F.G.; Horne, R.N.; Brigham, W.E.; Gudmundsson, J.S.

    1983-12-15

    The attendance at the Workshop was similar to last year's with 123 registered participants of which 22 represented 8 foreign countries. A record number of technical papers (about 60) were submitted for presentation at the Workshop. The Program Committee, therefore, decided to have several parallel sessions to accommodate most of the papers. This format proved unpopular and will not be repeated. Many of the participants felt that the Workshop lost some of its unique qualities by having parallel sessions. The Workshop has always been held near the middle of December during examination week at Stanford. This timing was reviewed in an open discussion at the Workshop. The Program Committee subsequently decided to move the Workshop to January. The Tenth Workshop will be held on January 22-24, 1985. The theme of the Workshop this year was ''field developments worldwide''. The Program Committee addressed this theme by encouraging participants to submit field development papers, and by inviting several international authorities to give presentations at the Workshop. Field developments in at least twelve countries were reported: China, El Salvador, France, Greece, Iceland, Italy, Japan, Kenya, Mexico, New Zealand, the Philippines, and the United States. There were 58 technical presentations at the Workshop, of which 4 were not made available for publication. Several authors submitted papers not presented at the Workshop. However, these are included in the 60 papers of these Proceedings. The introductory address was given by Ron Toms of the U.S. Department of Energy, and the banquet speaker was A1 Cooper of Chevron Resources Company. An important contribution was made to the Workshop by the chairmen of the technical sessions. Other than Stanford Geothermal Program faculty members, they included: Don White (Field Developments), Bill D'Olier (Hydrothermal Systems), Herman Dykstra (Well Testing), Karsten Pruess (Well Testing), John Counsil (Reservoir Chemistry), Malcolm Mossman (Reservoir Chemistry), Greg Raasch (Production), Manny Nathenson (Injection), Susan Petty (Injection), Subir Sanyal (Simulation), Marty Molloy (Petrothermal), and Allen Moench (Reservoir Physics). The Workshop was organized by the Stanford Geothermal Program faculty, staff and students. We would like to thank Jean Cook, Joanne Hartford, Terri Ramey, Amy Osugi, and Marilyn King for their valued help with the Workshop arrangements and the Proceedings. We also owe thanks to the program students who arranged and operated the audio-visual equipment. The Ninth Workshop was supported by the Geothermal and Hydropower Technologies Division of the U . S . Department of Energy through contract DE-AT03-80SF11459. We deeply appreciate this continued support. H. J. Ramey, Jr., R. N. Horne, P. Kruger, W. E. Brigham, F. G. Miller, J. S . Gudmundsson -vii

  5. Evaluation of hydrothermal resources of North Dakota. Phase III final technical report

    SciTech Connect (OSTI)

    Harris, K.L.; Howell, F.L.; Wartman, B.L.; Anderson, S.B.

    1982-08-01

    The hydrothermal resources of North Dakota were evaluated. This evaluation was based on existing data on file with the North Dakota Geological Survey (NDGS) and other state and federal agencies, and field and laboratory studies conducted. The principal sources of data used during the study were WELLFILE, the computer library of oil and gas well data developed during the Phase I study, and WATERCAT, a computer library system of water well data assembled during the Phase II study. A field survey of the shallow geothermal gradients present in selected groundwater observation holes was conducted. Laboratory determinations of the thermal conductivity of core samples were done to facilitate heat-flow calculations on those holes-of-convenience cased.

  6. Funding Mechanisms for Federal Geothermal Permitting (Presentation)

    SciTech Connect (OSTI)

    Witherbee, K.

    2014-03-01

    This presentation is about the GRC paper, which discusses federal agency revenues received for geothermal projects and potential federal agency budget sources for processing geothermal applications.

  7. 2014 Geothermal Resources Council Annual Meeting

    Broader source: Energy.gov [DOE]

    The Annual Meeting attracts geothermal industry stakeholders worldwide and provides opportunity to participate in presentations on geothermal research, exploration, development, and utilization.

  8. Geothermal Reconnaissance From Quantitative Analysis Of Thermal...

    Open Energy Info (EERE)

    Geothermal Reconnaissance From Quantitative Analysis Of Thermal Infrared Imagery Jump to: navigation, search OpenEI Reference LibraryAdd to library Reference: Geothermal...

  9. The Energy Department's Geothermal Technologies Office Releases...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    The Energy Department's Geothermal Technologies Office Releases 2013 Annual Report The Energy Department's Geothermal Technologies Office Releases 2013 Annual Report February 7,...

  10. Geothermal Exploration Best Practices Webinar Presentation Now...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Renewable Energy DOE Projects Receive Honors for Best Geothermal Presentations Workshop to Examine Outlook for State and Federal Policies to Promote Geothermal Energy in the West...

  11. NATIONAL GEOTHERMAL INFORMATION RESOURCE ANNUAL REPORT, 1977

    E-Print Network [OSTI]

    Phillips, Sidney L.

    2012-01-01

    Review o f Geothermal Subsidence", LBL-3220, Sept. 1975. 5.bles emissions; (3) subsidence; and (4) boron. Generally,Review of Geothermal Subsidence", LBL-3220, September 1975.

  12. Geothermal Technologies Program Annual Peer Review Presentation...

    Broader source: Energy.gov (indexed) [DOE]

    2012 Peer Review presentation by Doug Hollett, Program Manager, Geothermal Technologies Program gtp2012peerreviewdhollett.pdf More Documents & Publications Stanford Geothermal...

  13. Geothermal Technologies Office 2015 Peer Review

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    | US DOE Geothermal Office eere.energy.gov Geothermal Technologies Office 2015 Peer Review Sustainability of Shear-Induced Permeability for EGS Reservoirs - A Laboratory...

  14. Integrated Geoscience Investigation and Geothermal Exploration...

    Open Energy Info (EERE)

    Al., 2006) Isotopic Analysis At Chena Geothermal Area (Holdmann, Et Al., 2006) Micro-Earthquake At Chena Geothermal Area (Holdmann, Et Al., 2006) Pressure Temperature Log At Chena...

  15. Strategic Planning, Analysis, and Geothermal Informatics Subprogram...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Strategic Planning, Analysis, and Geothermal Informatics Subprogram Overview Strategic Planning, Analysis, and Geothermal Informatics Subprogram Overview This is an overview of...

  16. Geothermal Direct Use Technology and the Marketplace

    Broader source: Energy.gov [DOE]

    Geothermal energy applications are emerging across a much wider spectrum of cascaded uses, from lower temperature geothermal energy production to direct heating and cooling, to agricultural uses.

  17. Innovative Exploration Techniques for Geothermal Assessment at...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Innovative Exploration Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Innovative Exploration...

  18. Modeling of Geothermal Reservoirs: Fundamental Processes, Computer...

    Open Energy Info (EERE)

    Abstract This article attempts to critically evaluate the present state of the art of geothermal reservoir simulation. Methodological aspects of geothermal reservoir...

  19. Google Archives by Fiscal Year — Geothermal

    Broader source: Energy.gov [DOE]

    From the EERE Web Statistics Archive: Geothermal Technologies Office, retired Google Analytics profiles for the Geothermal Technologies Blog for FY12-FY13.

  20. North Carolina/Geothermal | Open Energy Information

    Open Energy Info (EERE)

    Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon North CarolinaGeothermal < North Carolina Jump to: navigation, search GEOTHERMAL...

  1. Geothermal Energy Production from Low Temperature Resources,...

    Open Energy Info (EERE)

    Geothermal Energy Production from Low Temperature Resources, Coproduced Fluids from Oil and Gas Wells, and Geopressured Resources Jump to: navigation, search Geothermal ARRA...

  2. Sustainable Energy Resources for Consumers (SERC) -Geothermal...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Sustainable Energy Resources for Consumers (SERC) - GeothermalGround-Source Heat Pumps Sustainable Energy Resources for Consumers (SERC) - GeothermalGround-Source Heat Pumps...

  3. Cuttings Analysis At International Geothermal Area, Indonesia...

    Open Energy Info (EERE)

    Cuttings Analysis At International Geothermal Area, Indonesia (Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Cuttings Analysis At...

  4. The Geothermal Technologies Office Congratulates this Year's...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    to bring new geothermal power online. Surprise Valley Electrification Corporation, in Paisley, Oregon, (in the image left) seeks to develop geothermal electric power from an...

  5. Integrated Chemical Geothermometry System for Geothermal Exploration

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Develop practical and reliable system to predict geothermal reservoir temperatures from integrated chemical analyses of spring and well fluids.

  6. Daemen Alternative Energy/Geothermal Technologies Demonstration...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Daemen Alternative EnergyGeothermal Technologies Demonstration Program Erie County Daemen Alternative EnergyGeothermal Technologies Demonstration Program Erie County Project...

  7. GETEM -Geothermal Electricity Technology Evaluation Model | Department...

    Broader source: Energy.gov (indexed) [DOE]

    guide to providing input to GETEM, the Geothermal Electricity Technology Evaluation Model. GETEM is designed to help the Geothermal Technologies Program of the U.S. Department of...

  8. 2012 Geothermal Webinar | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    This Office of Indian Energy webinar provides information on developing geothermal resources on tribal lands with an overview of: geothermal resources by region; technology...

  9. An Evaluation of Enhanced Geothermal Systems Technology

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    An Evaluation of Enhanced Geothermal Systems Technology Geothermal Technologies Program 2008 Foreword This document presents the results of an eight-month study by the Department...

  10. Analysis of Geothermal Reservoir Stimulation Using Geomechanics...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Program Peer Review Report Seismic Fracture Characterization Methods for Enhanced Geothermal Systems; 2010 Geothermal Technology Program Peer Review Report Microseismic Study...

  11. Employment Impacts of Geothermal Electric Projects (Technical...

    Office of Scientific and Technical Information (OSTI)

    Employment Impacts of Geothermal Electric Projects Citation Details In-Document Search Title: Employment Impacts of Geothermal Electric Projects You are accessing a document...

  12. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    around the state at over 50 temperature anomalies. Examined correlations between structures and thermal anomalies. Made recommendations for future geothermal use. Much of the...

  13. BOREHOLE PRECONDITIONING OF GEOTHERMAL WELLS FOR ENHANCED GEOTHERMAL...

    Open Energy Info (EERE)

    to precondition a well to optimize fracturing and production during Enhanced Geothermal System (EGS) reservoir development. A finite element model was developed for the fully...

  14. Geothermal Site Assessment Using the National Geothermal Data...

    Open Energy Info (EERE)

    Company Organization: University of Nevada-Reno Sector: Energy Focus Area: Renewable Energy, Geothermal Topics: Resource assessment Resource Type: Case studiesexamples,...

  15. Hydrothermal changes related to earthquake activity at Mud Volcano, Yellowstone National Park, Wyoming

    SciTech Connect (OSTI)

    Pitt, A.M.; Hutchinson, R.A.

    1982-04-10

    The Mud Volcano hydrothermal area in Yellowstone National Park is near the intersection of a 20-km-long zone of northeast trending normal faults with the eastern resurgent dome within the 600,000-year-odd Yellowstone caldera. Recent crustal uplift along the northeast trending axis of the caldera is at a maximum (700 mm since 1923) near the Mud Volcano area. From 1973 through April 1978, less than 10 earthquakes (largest M 2.4) were located within 3 km of the Mud Volcano area. In May 1978, earthquakes began occurring beneath the hydrothermal area at depths of 1 to 5 km. The seismic activity continued until the end of November with intense swarms (100 events per hour) occurring on October 23 and November 7. The largest event (M 3.1) occured on November 14 and at least 8 events were M 2.5 or larger. In December 1978, heat flux in the Mud Volcano hydrothermal features began increasing along a 2-km-long northeast trending zone. Existing mud cauldrons became more active, new mud cauldrons and fumeroles were formed, and vegetation (primarily lodgepole pine) was killed by increased soil temperature. The increase in heat flux continued through July 1979 then gradually declined, reaching the early 1978 level by June 1980. The spatial and temporal association of earthquakes and increased hydrothermal activity at Mud Volcano suggests that the seismic activity expanded preexisting fracture systems, premitting increased fluid flow from depths of several kilometers.

  16. Chemical logging of geothermal wells

    DOE Patents [OSTI]

    Allen, Charles A. (Idaho Falls, ID); McAtee, Richard E. (Idaho Falls, ID)

    1981-01-01

    The presence of geothermal aquifers can be detected while drilling in geothermal formations by maintaining a chemical log of the ratio of the concentrations of calcium to carbonate and bicarbonate ions in the return drilling fluid. A continuous increase in the ratio of the concentrations of calcium to carbonate and bicarbonate ions is indicative of the existence of a warm or hot geothermal aquifer at some increased depth.

  17. Pahoa geothermal industrial park. Engineering and economic analysis for direct applications of geothermal energy in an industrial park at Pahoa, Hawaii

    SciTech Connect (OSTI)

    Moreau, J.W.

    1980-12-01

    This engineering and economic study evaluated the potential for developing a geothermal industrial park in the Puna District near Pahoa on the Island of Hawaii. Direct heat industrial applications were analyzed from a marketing, engineering, economic, environmental, and sociological standpoint to determine the most viable industries for the park. An extensive literature search produced 31 existing processes currently using geothermal heat. An additional list was compiled indicating industrial processes that require heat that could be provided by geothermal energy. From this information, 17 possible processes were selected for consideration. Careful scrutiny and analysis of these 17 processes revealed three that justified detailed economic workups. The three processes chosen for detailed analysis were: an ethanol plant using bagasse and wood as feedstock; a cattle feed mill using sugar cane leaf trash as feedstock; and a papaya processing facility providing both fresh and processed fruit. In addition, a research facility to assess and develop other processes was treated as a concept. Consideration was given to the impediments to development, the engineering process requirements and the governmental support for each process. The study describes the geothermal well site chosen, the pipeline to transmit the hydrothermal fluid, and the infrastructure required for the industrial park. A conceptual development plan for the ethanol plant, the feedmill and the papaya processing facility was prepared. The study concluded that a direct heat industrial park in Pahoa, Hawaii, involves considerable risks.

  18. NREL SBV Pilot Geothermal Technologies

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of experimental data, high-resolution 3-D visual imagery and large-scale simulation data. For more information, contact: Craig.Turchi@nrel.gov (Geothermal Technical Questions)...

  19. Direct application of geothermal energy

    SciTech Connect (OSTI)

    Reistad, G.M.

    1980-01-01

    An overall treatment of direct geothermal applications is presented with an emphasis on the above-ground engineering. The types of geothermal resources and their general extent in the US are described. The potential market that may be served with geothermal energy is considered briefly. The evaluation considerations, special design aspects, and application approaches for geothermal energy use in each of the applications are considered. The present applications in the US are summarized and a bibliography of recent studies and applications is provided. (MHR)

  20. Geothermal Research and Development Programs

    Broader source: Energy.gov [DOE]

    Here you'll find links to laboratories, universities, and colleges conducting research and development (R&D) in geothermal energy technologies.

  1. Hydrothermal stability of high silica zeolites 

    E-Print Network [OSTI]

    Young, David

    1988-01-01

    This thesis concerns the hydrothermal stability of two zeolite molecular sieves with the MFI structure, ZSM-5 and its 'aluminium free' form silicalite. Silicalite was synthesised from low pH alkali metal free aqueous gels at 95°C and characterised...

  2. NATIONAL GEOTHERMAL DATA SYSTEM (NGDS) GEOTHERMAL DATA DOMAIN: ASSESSMENT OF GEOTHERMAL COMMUNITY DATA NEEDS

    SciTech Connect (OSTI)

    Anderson, Arlene; Blackwell, David; Chickering, Cathy; Boyd, Toni; Horne, Roland; MacKenzie, Matthew; Moore, Joseph; Nickull, Duane; Richard, Stephen; Shevenell, Lisa A.

    2013-01-01

    To satisfy the critical need for geothermal data to ad- vance geothermal energy as a viable renewable ener- gy contender, the U.S. Department of Energy is in- vesting in the development of the National Geother- mal Data System (NGDS). This paper outlines efforts among geothermal data providers nationwide to sup- ply cutting edge geo-informatics. NGDS geothermal data acquisition, delivery, and methodology are dis- cussed. In particular, this paper addresses the various types of data required to effectively assess geother- mal energy potential and why simple links to existing data are insufficient. To create a platform for ready access by all geothermal stakeholders, the NGDS in- cludes a work plan that addresses data assets and re- sources of interest to users, a survey of data provid- ers, data content models, and how data will be ex- changed and promoted, as well as lessons learned within the geothermal community.

  3. Recovery Act. Development and Validation of an Advanced Stimulation Prediction Model for Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Gutierrez, Marte

    2013-12-31

    This research project aims to develop and validate an advanced computer model that can be used in the planning and design of stimulation techniques to create engineered reservoirs for Enhanced Geothermal Systems. The specific objectives of the proposal are to; Develop a true three-dimensional hydro-thermal fracturing simulator that is particularly suited for EGS reservoir creation; Perform laboratory scale model tests of hydraulic fracturing and proppant flow/transport using a polyaxial loading device, and use the laboratory results to test and validate the 3D simulator; Perform discrete element/particulate modeling of proppant transport in hydraulic fractures, and use the results to improve understand of proppant flow and transport; Test and validate the 3D hydro-thermal fracturing simulator against case histories of EGS energy production; and Develop a plan to commercialize the 3D fracturing and proppant flow/transport simulator. The project is expected to yield several specific results and benefits. Major technical products from the proposal include; A true-3D hydro-thermal fracturing computer code that is particularly suited to EGS; Documented results of scale model tests on hydro-thermal fracturing and fracture propping in an analogue crystalline rock; Documented procedures and results of discrete element/particulate modeling of flow and transport of proppants for EGS applications; and Database of monitoring data, with focus of Acoustic Emissions (AE) from lab scale modeling and field case histories of EGS reservoir creation.

  4. Hazard assessment in geothermal exploration: The case of Mt. Parker, Southern Philippines

    SciTech Connect (OSTI)

    Delfin, F.G. Jr.; Salonga, N.D.; Bayon, F.E.B.

    1996-12-31

    Hazard assessment of the Mt. Parker geothermal prospect, conducted in parallel with the surface exploration from 1992 to 1994, was undertaken to determine the long-term suitability of the prospect for development. By comparison with other acidic magmatic-hydrothermal systems in the Philippines, the geochemical data indicated minimal input of acidic magmatic fluids into Mt. Parker`s hydrothermal system. This system was regarded to be a neutral-pH and high-enthalpy chloride reservoir with temperature of at least 200-250{degrees}C. These favorable geochemical indications contrasted sharply with the C-14 and volcanological data indicating a shallow magmatic body with a potential for future eruption. This hazard led PNOC EDC to discontinue the survey and abandon the prospect by late 1994. On September 6, 1995, a flashflood of non-volcanic origin from the caldera lake killed nearly 100 people on the volcano`s northwestern flank.

  5. The boron isotope systematics of the Yellowstone National Park (Wyoming) hydrothermal system: A reconnaissance

    SciTech Connect (OSTI)

    Palmer, M.R. (Bristol Univ. (England)); Sturchio, N.C. (Argonne National Lab., IL (USA))

    1990-10-01

    Boron concentrations and isotope compositions have been measured in fourteen hot spring waters, two drill hole waters, an unaltered rhyolite flow, and hydrothermally altered rhyolite from the geothermal system in Yellowstone National Park, Wyoming. The samples are representative of the major thermal areas within the park and span the range of fluid types. For the fluids, the B concentrations range from 0.043-2.69 mM/kg, and the {delta}{sup 11}B values range from {minus}9.3 to +4.4{per thousand}. There is no relationship between the dissolved B concentrations or isotope compositions with the concentration of any major element (other than Cl) or physical property. Each basin is characterized by a restricted range in B/Cl ratios and {delta}{sup 11}B values. Hot spring waters from the Norris Basin, Upper Geyser Basin, Calcite Springs, and Clearwater have {delta}{sup 11}B values close to that of unaltered rhyolite ({minus}5.2{per thousand}) and are interpreted to have derived their B from this source. Waters from Mammoth Hot Springs, Sheepeater, and Rainbow Springs have lower {delta}{sup 11}B values close to {minus}8{per thousand}. These lower values may reflect leaching of B from sedimentary rocks outside the Yellowstone caldera, but they are similar to the {delta}{sup 11}B value of hydrothermally altered rhyolite ({minus}9.7{per thousand}). Hence, the light boron isotope compositions recorded in these hot spring waters may reflect leaching of previously deposited hydrothermal minerals. Cooler springs along the Yellowstone River just outside the park boundary have lower B concentrations and higher {delta}{sup 11}B values that may reflect mixing with shallow meteoric water.

  6. Hawaii's Geothermal Development

    SciTech Connect (OSTI)

    Uemura, Roy T.

    1980-12-01

    On July 2, 1976, an event took place in the desolate area of Puna, on the island of Hawaii, which showed great promise of reducing Hawaii's dependence on fuel oil. This great event was the flashing of Hawaii's first geothermal well which was named HGP-A. The discovery of geothermal energy was a blessing to Hawaii since the electric utilities are dependent upon fuel oil for its own electric generating units. Over 50% of their revenues pay for imported fuel oil. Last year (1979) about $167.1 million left the state to pay for this precious oil. The HGP-A well was drilled to a depth of 6450 feet and the temperature at the bottom of the hole was measured at 676 F, making it one of the hottest wells in the world.

  7. Geothermal Progress Monitor 12

    SciTech Connect (OSTI)

    1990-12-01

    Some of the more interesting articles in this GPM are: DOE supporting research on problems at The Geysers; Long-term flow test of Hot Dry Rock system (at Fenton Hill, NM) to begin in Fiscal Year 1992; Significant milestones reached in prediction of behavior of injected fluids; Geopressured power generation experiment yields good results. A number of industry-oriented events and successes are reported, and in that regard it is noteworthy that this report comes near the end of the most active decade of geothermal power development in the U.S. There is a table of all operating U.S. geothermal power projects. The bibliography of research reports at the end of this GPM is useful. (DJE 2005)

  8. SILICA FOULING BY GEOTHERMAL PART III SILICA FOULING BY GEOTHERMAL WATERS

    E-Print Network [OSTI]

    Gudmundsson, Jon Steinar

    PART III SILICA FOULING BY GEOTHERMAL WATERS #12;- 49 - PART III SILICA FOULING BY GEOTHERMAL WATERS 1. INTRODUCTION In recent years the world-wide interest in geothermal energy has been stimulated in geothermal engineering; that of deposition and fouling. Presently, geothermal waters containing useful energy

  9. Geothermal resources of Montana

    SciTech Connect (OSTI)

    Metesh, J.

    1994-06-01

    The Montana Bureau of Mines and Geology has updated its inventory of low and moderate temperature resources for the state and has assisted the Oregon Institute of Technology - GeoHeat Center and the University of Utah Research Institute in prioritizing and collocating important geothermal resource areas. The database compiled for this assessment contains information on location, flow, water chemistry, and estimated reservoir temperatures for 267 geothermal well and springs in Montana. For this assessment, the minimum temperature for low-temperature resource is defined as 10{degree} C above the mean annual air temperature at the surface. The maximum temperature for a moderate-temperature resource is defined as greater than 50{degree} C. Approximately 12% of the wells and springs in the database have temperatures above 50{degree} C, 17% are between 30{degree} and 50{degree} C, 29% are between 20{degree} and 30{degree}C, and 42% are between 10{degree} and 20{degree} C. Low and moderate temperature wells and springs can be found in nearly all areas of Montana, but most are in the western third of the state. Information sources for the current database include the MBMG Ground Water Information Center, the USGS statewide database, the USGS GEOTHERM database, and new information collected as part of this program. Five areas of Montana were identified for consideration in future investigations of geothermal development. The areas identified are those near Bozeman, Ennis, Butte, Boulder, and Camas Prairie. These areas were chosen based on the potential of the resource and its proximity to population centers.

  10. Federal Interagency Geothermal Activities

    SciTech Connect (OSTI)

    Anderson, Arlene; Prencipe, Loretta; Todaro, Richard M.; Cuyler, David; Eide, Elizabeth

    2011-06-01

    This collaborative document describes the roles and responsibilities of key Federal agencies in the development of geothermal technologies including the U.S. Department of Energy (DOE); the U.S. Department of Agriculture (USDA), including the U.S. Forest Service; the U.S. Department of Interior (DOI), including the United States Geological Survey (USGS) and Bureau of Land Management (BLM); the Environmental Protection Agency (EPA); and the Department of Defense (DOD).

  11. Geothermal Success Stories

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuelsof Energy Services »Information1 Geothermal Success Stories en Percussive

  12. Geothermal Technologies Office

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuelsof Energy Services »Information1 Geothermal Success Stories ennear-term 8

  13. Geothermal Technologies Office: Publications

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuelsof Energy Services »Information1 Geothermal SuccessInformation Resources

  14. GEOTHERMAL POWER GENERATION PLANT

    SciTech Connect (OSTI)

    Boyd, Tonya

    2013-12-01

    Oregon Institute of Technology (OIT) drilled a deep geothermal well on campus (to 5,300 feet deep) which produced 196oF resource as part of the 2008 OIT Congressionally Directed Project. OIT will construct a geothermal power plant (estimated at 1.75 MWe gross output). The plant would provide 50 to 75 percent of the electricity demand on campus. Technical support for construction and operations will be provided by OIT’s Geo-Heat Center. The power plant will be housed adjacent to the existing heat exchange building on the south east corner of campus near the existing geothermal production wells used for heating campus. Cooling water will be supplied from the nearby cold water wells to a cooling tower or air cooling may be used, depending upon the type of plant selected. Using the flow obtained from the deep well, not only can energy be generated from the power plant, but the “waste” water will also be used to supplement space heating on campus. A pipeline will be construction from the well to the heat exchanger building, and then a discharge line will be construction around the east and north side of campus for anticipated use of the “waste” water by facilities in an adjacent sustainable energy park. An injection well will need to be drilled to handle the flow, as the campus existing injection wells are limited in capacity.

  15. Earthquake and Geothermal Energy

    E-Print Network [OSTI]

    Kapoor, Surya Prakash

    2013-01-01

    The origin of earthquake has long been recognized as resulting from strike-slip instability of plate tectonics along the fault lines. Several events of earthquake around the globe have happened which cannot be explained by this theory. In this work we investigated the earthquake data along with other observed facts like heat flow profiles etc... of the Indian subcontinent. In our studies we found a high-quality correlation between the earthquake events, seismic prone zones, heat flow regions and the geothermal hot springs. As a consequence, we proposed a hypothesis which can adequately explain all the earthquake events around the globe as well as the overall geo-dynamics. It is basically the geothermal power, which makes the plates to stand still, strike and slip over. The plates are merely a working solid while the driving force is the geothermal energy. The violent flow and enormous pressure of this power shake the earth along the plate boundaries and also triggers the intra-plate seismicity. In the light o...

  16. Conceptual Model At Valles Caldera - Redondo Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Area (Gardner, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Conceptual Model At Valles Caldera - Redondo Geothermal Area...

  17. Conceptual Model At Valles Caldera - Sulphur Springs Geothermal...

    Open Energy Info (EERE)

    Geothermal Area (Gardner, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Conceptual Model At Valles Caldera - Sulphur Springs Geothermal...

  18. Ground Gravity Survey At Neal Hot Springs Geothermal Area (U...

    Open Energy Info (EERE)

    Ground Gravity Survey At Neal Hot Springs Geothermal Area (U.S. Geothermal Inc., 2007) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground...

  19. Reconnaissance geothermal exploration at Raft River, Idaho from...

    Open Energy Info (EERE)

    library Journal Article: Reconnaissance geothermal exploration at Raft River, Idaho from thermal infrared scanning Abstract GEOTHERMAL ENERGY; GEOTHERMAL FIELDS; INFRARED SURVEYS;...

  20. Thermal Gradient Holes At Neal Hot Springs Geothermal Area (U...

    Open Energy Info (EERE)

    Thermal Gradient Holes At Neal Hot Springs Geothermal Area (U.S. Geothermal Inc., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal...

  1. INJECTION AND THERMAL BREAKTHROUGH IN FRACTURED GEOTHERMAL RESERVOIRS

    E-Print Network [OSTI]

    Bodvarsson, Gudmundur S.

    2012-01-01

    Applications & Operations, Geothermal Energy Division of theP. , and Otte, C. , Geothermal energy: Stanford, California,Applications & Operations, Geothermal Energy Division of the

  2. VALUE DISTRIBUTION ASSESSMENT OF GEOTHERMAL DEVELOPMENT IN LAKE COUNTY, CA

    E-Print Network [OSTI]

    Churchman, C.W.

    2011-01-01

    Eleven: Lake County Geothermal Energy Resource. . . .of Susanville, Susanville Geothermal Energy Project Workshopparts of the state. Geothermal energy is only one of Lake

  3. GEOTHERMAL RESERVOIR ENGINEERING MANGEMENT PROGRAM PLAN (GREMP PLAN)

    E-Print Network [OSTI]

    Bloomster, C.H.

    2010-01-01

    2 Mission of Division of Geothermal Energy . . . . .Milora and J . W. Tester, Geothermal Energy as a Source o fNations Symposium on Geothermal Energy, San Francisco, May

  4. Low-Temperature, Coproduced, and Geopressured Geothermal Power...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Low-Temperature, Coproduced, and Geopressured Geothermal Power Low-Temperature, Coproduced, and Geopressured Geothermal Power The Geothermal Technology Program (GTP)...

  5. LOW TEMPERATURE GEOTHERMAL MINERAL RECOVERY PROGRAM 02/11/2014...

    Broader source: Energy.gov (indexed) [DOE]

    mineral-webinar.pdf More Documents & Publications LOW TEMPERATURE GEOTHERMAL MINERAL RECOVERY PROGRAM Geothermal Play Fairway Analysis Geothermal Play Fairway Analysis...

  6. 3D Magnetotelluic characterization of the Coso Geothermal Field

    E-Print Network [OSTI]

    Newman, Gregory A.; Hoversten, G. Michael; Wannamaker, Philip E.; Gasperikova, Erika

    2008-01-01

    130, 475-496. the Coso Geothermal Field, Proc.28 th Workshop on Geothermal Reservoir Engineering, Stanfords ratio and porosity at Coso geothermal area, California: J.

  7. STATUS OF GEOTHERMAL RESERVOIR ENGINEERING MANAGEMENT PROGRAM ("GREMP") -DECEMBER, 1979

    E-Print Network [OSTI]

    Howard, J. H.

    2012-01-01

    the characteristics of a geothermal reservoir: Items 2, 6,new data important to geothermal reservoir engineering prac-forecast performance of the geothermal reservoir and bore

  8. Geothermal Literature Review At Fish Lake Valley Area (Deymonaz...

    Open Energy Info (EERE)

    Geothermal Literature Review At Fish Lake Valley Area (Deymonaz, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  9. Seismic triggering by rectified diffusion in geothermal systems

    E-Print Network [OSTI]

    Sturtevant, Bradford; Kanamori, Hiroo; Brodsky, Emily E.

    1996-01-01

    diffusion in geothermal systems Bradford Sturtevant Graduateof pressure In geothermal systems, fluid flow throughsystems. The modeled geothermal system consists of fractured

  10. STATUS OF GEOTHERMAL RESERVOIR ENGINEERING MANAGEMENT PROGRAM ("GREMP") -DECEMBER, 1979

    E-Print Network [OSTI]

    Howard, J. H.

    2012-01-01

    are applicable to geothermal systems, and esta- blish aof an unexploited geothermal system has been constructed inment methods for geothermal well system param- eters,

  11. The Geysers Geothermal Field Update1990/2010

    E-Print Network [OSTI]

    Brophy, P.

    2012-01-01

    In: Active Geothermal Systems and  Gold?Mercury Deposits in 1993.  Active geothermal systems and gold mercury deposits A  planned  Enhanced  Geothermal  System  demonstration 

  12. GEOTHERMAL RESERVOIR ENGINEERING MANGEMENT PROGRAM PLAN (GREMP PLAN)

    E-Print Network [OSTI]

    Bloomster, C.H.

    2010-01-01

    the Behavior of Geothermal Systems . . . . . . . . . 1 6energy transport in geothermal systems. Analysis o f shortthe Behavior of Geothermal Systems B. Numerical Model i ng

  13. Seismic methods for resource exploration in enhanced geothermal systems

    E-Print Network [OSTI]

    Gritto, Roland; Majer, Ernest L.

    2002-01-01

    Exploration in Enhanced Geothermal Systems Roland Gritto andestablished an Enhanced Geothermal Systems Program (EGSP) toartificially created geothermal systems. The challenges in

  14. Boise City Geothermal District Heating District Heating Low Temperatur...

    Open Energy Info (EERE)

    Boise City Geothermal District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Boise City Geothermal District Heating District Heating...

  15. Geothermal Literature Review At General Us Region (Williams ...

    Open Energy Info (EERE)

    Geothermal Literature Review At General Us Region (Williams & Reed, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature...

  16. Geothermal Literature Review At Lake City Hot Springs Area (Benoit...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lake City Hot Springs Area (Benoit, Et Al., 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  17. Geothermal Literature Review At General Us Region (Blackwell...

    Open Energy Info (EERE)

    Geothermal Literature Review At General Us Region (Blackwell, Et Al., 2000) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature...

  18. Purchase and Installation of a Geothermal Power Plant to Generate...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Purchase and Installation of a Geothermal Power Plant to Generate Electricity Using Geothermal Water Resources Purchase and Installation of a Geothermal Power Plant to Generate...

  19. DOE Offers $15 Million Geothermal Heat Recovery Opportunity ...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    15 Million Geothermal Heat Recovery Opportunity DOE Offers 15 Million Geothermal Heat Recovery Opportunity August 25, 2010 - 11:11am Addthis Photo of geothermal power plant....

  20. NREL: Awards and Honors - Geothermal Energy Association Honors...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    U.S. Department of Energy Geothermal Technologies Office, the Geothermal Prospector, a mapping tool that provides a data resource for visual exploration of geothermal resources....

  1. First Commercial Success for Enhanced Geothermal Systems (EGS...

    Energy Savers [EERE]

    First Commercial Success for Enhanced Geothermal Systems (EGS) Spells Exponential Growth for Geothermal Energy First Commercial Success for Enhanced Geothermal Systems (EGS) Spells...

  2. A Revolutionary Hybrid Thermodynamic Cycle for Bianary Geothermal...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Fluids and Their Effect on Geothermal Turbines Tailored Working Fluids for Enhanced Binary Geothermal Power Plants Metal Organic Heat Carriers for Enhanced Geothermal Systems...

  3. 3D Magnetotelluic characterization of the Coso Geothermal Field

    E-Print Network [OSTI]

    Newman, Gregory A.; Hoversten, G. Michael; Wannamaker, Philip E.; Gasperikova, Erika

    2008-01-01

    Creation of an enhanced geothermal system through hydraulicTechnologies, Enhanced Geothermal Systems Program, also seesupport of the enhanced geothermal systems concept: survey

  4. Seismic methods for resource exploration in enhanced geothermal systems

    E-Print Network [OSTI]

    Gritto, Roland; Majer, Ernest L.

    2002-01-01

    Exploration in Enhanced Geothermal Systems Roland Gritto andestablished an Enhanced Geothermal Systems Program (EGSP) toin developing Enhanced Geothermal Systems (EGS) include,

  5. Geothermal Industry Ends 2012 on a High Note | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    additional highlights of geothermal industry development in 2012 were: The first hybrid solar-geothermal project was commissioned by Enel Green Power at its Stillwater Geothermal...

  6. Raft River Geothermal Area Data Models - Conceptual, Logical...

    Open Energy Info (EERE)

    Tables, Figures and other Content in Reports from the Raft River Geothermal Project: "Technical Report on the Raft River Geothermal Resource, Cassia County, Idaho," GeothermEx,...

  7. Geothermal Energy R&D Program Annual Progress Report for Fiscal Year 1992

    SciTech Connect (OSTI)

    1993-07-01

    Geothermal budget actual amounts are shown for FY 1989 -1992, broken down by about 15 categories. Here, the main Program categories are: Exploration Technology, Drilling Technology, Reservoir Technology, Conversion Technology (power plants and materials), Industry-Coupled Drilling, Drilling Applications, Reservoir Engineering Applications, Direct Heat, Geopressured Wells Operation, and Hot Dry Rock Research. Here the title--Industry-Coupled Drilling--covered case studies of the Coso, CA, and Dixie Valley, NV, fields, and the Long Valley Exploratory Well (which had started as a magma energy exploration project, but reported here as a hydrothermal prospect evaluation well). (DJE 2005)

  8. Webtrends Archives by Fiscal Year — Geothermal

    Office of Energy Efficiency and Renewable Energy (EERE)

    From the EERE Web Statistics Archive: Geothermal Technologies Office, Webtrends archives by fiscal year.

  9. ANNOTATED RESEARCH BIBLIOGRAPHY FOR GEOTHERMAL RESERVOIR ENGINEERING

    E-Print Network [OSTI]

    Sudo!, G.A

    2012-01-01

    data base from which general management procedures , interpretive techniques , and conceptual models for producin geothermal systems

  10. Geothermal direct-heat utilization assistance

    SciTech Connect (OSTI)

    Not Available

    1992-12-01

    Progress on technical assistance, R D activities, technology transfer, and geothermal progress monitoring is summarized.

  11. 2013 National Geothermal Student Competition Background

    E-Print Network [OSTI]

    Carrington, Emily

    1 2013 National Geothermal Student Competition Background: The 2013 National Geothermal Student, is designed to advance the understanding of geothermal energy as a valued resource by promoting innovation to engage students in a collaborative exercise to develop a business plan for developing a geothermal

  12. Livingston Campus Geothermal Project The Project

    E-Print Network [OSTI]

    Delgado, Mauricio

    Livingston Campus Geothermal Project The Project: Geothermal power is a cost effective, reliable is a Closed Loop Geothermal System involving the removal and storage of approximately four feet of dirt from the entire Geothermal Field and the boring of 321 vertical holes reaching a depth of 500 feet. These holes

  13. Geothermal resource evaluation of the Yuma area

    SciTech Connect (OSTI)

    Poluianov, E.W.; Mancini, F.P.

    1985-11-29

    This report presents an evaluation of the geothermal potential of the Yuma, Arizona area. A description of the study area and the Salton Trough area is followed by a geothermal analysis of the area, a discussion of the economics of geothermal exploration and exploitation, and recommendations for further testing. It was concluded economic considerations do not favor geothermal development at this time. (ACR)

  14. New River Geothermal Research Program

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation: Project objectives: Demonstration of an innovative blend of modern tectonic research applied to the Imperial Valley with a proprietary compilation of existing thermal and drilling data. The developed geologic model will guide the targeting of two test wells and the identification of permeable zones capable of commercial geothermal power production.

  15. Silica extraction from geothermal water

    DOE Patents [OSTI]

    Bourcier, William L; Bruton, Carol J

    2014-09-23

    A method of producing silica from geothermal fluid containing low concentration of the silica of less than 275 ppm includes the steps of treating the geothermal fluid containing the silica by reverse osmosis treatment thereby producing a concentrated fluid containing the silica, seasoning the concentrated fluid thereby producing a slurry having precipitated colloids containing the silica, and separating the silica from the slurry.

  16. The Future of Geothermal Energy

    SciTech Connect (OSTI)

    Kubik, Michelle

    2006-01-01

    A comprehensive assessment of enhanced, or engineered, geothermal systems was carried out by an 18-member panel assembled by the Massachusetts Institute of Technology (MIT) to evaluate the potential of geothermal energy becoming a major energy source for the United States.

  17. Energy 101: Geothermal Heat Pumps

    SciTech Connect (OSTI)

    None

    2011-01-01

    An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe "loops" containing water. This edition of Energy 101 explores the benefits Geothermal and the science behind how it all comes together.

  18. Energy 101: Geothermal Heat Pumps

    ScienceCinema (OSTI)

    None

    2013-05-29

    An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe "loops" containing water. This edition of Energy 101 explores the benefits Geothermal and the science behind how it all comes together.

  19. -Injection Technology -Geothermal Reservoir Engineering

    E-Print Network [OSTI]

    Stanford University

    For the Period October 1, 1985 through September 30, 1986 DE-ASO7-84ID12529 Stanford Geothermal Program was initiated in fiscal year 1981. The report covers the period from October 1, 1985 through September 30, 1986SGP-TR-107 - Injection Technology - Geothermal Reservoir Engineering Research at Stanford Principal

  20. Calpine geothermal visitor center upgrade project An interactive approach to geothermal outreach and education at The Geysers

    E-Print Network [OSTI]

    Dobson, P.F.

    2014-01-01

    energy: Impact of enhanced geothermal systems (EGS) on thea DOE-funded Enhanced Geothermal System field demonstrationand potential of enhanced geothermal systems (EGS). The EGS

  1. 2008 Geothermal Technologies Market Report

    SciTech Connect (OSTI)

    Jonathan Cross

    2009-07-01

    This report describes market-wide trends for the geothermal industry throughout 2008 and the beginning of 2009. It begins with an overview of the GTP’s involvement with the geothermal industry and recent investment trends for electric generation technologies. The report next describes the current state of geothermal power generation and activity within the United States, costs associated with development, financing trends, an analysis of the levelized cost of energy (LCOE), and a look at the current policy environment. The report also highlights trends regarding direct use of geothermal energy, including GHPs.† The final sections of the report focus on international perspectives, employment and economic benefits from geothermal energy development, and potential incentives in pending national legislation.

  2. Environmental Assessment Lakeview Geothermal Project

    SciTech Connect (OSTI)

    Treis, Tania

    2012-04-30

    The Town of Lakeview is proposing to construct and operate a geothermal direct use district heating system in Lakeview, Oregon. The proposed project would be in Lake County, Oregon, within the Lakeview Known Geothermal Resources Area (KGRA). The proposed project includes the following elements: Drilling, testing, and completion of a new production well and geothermal water injection well; construction and operation of a geothermal production fluid pipeline from the well pad to various Town buildings (i.e., local schools, hospital, and Lake County Industrial Park) and back to a geothermal water injection well. This EA describes the proposed project, the alternatives considered, and presents the environmental analysis pursuant to the National Environmental Policy Act. The project would not result in adverse effects to the environment with the implementation of environmental protection measures.

  3. Geothermal Small Business Workbook [Geothermal Outreach and Project Financing

    SciTech Connect (OSTI)

    Elizabeth Battocletti

    2003-05-01

    Small businesses are the cornerstone of the American economy. Over 22 million small businesses account for approximately 99% of employers, employ about half of the private sector workforce, and are responsible for about two-thirds of net new jobs. Many small businesses fared better than the Fortune 500 in 2001. Non-farm proprietors income rose 2.4% in 2001 while corporate profits declined 7.2%. Yet not all is rosy for small businesses, particularly new ones. One-third close within two years of opening. From 1989 to 1992, almost half closed within four years; only 39.5% were still open after six years. Why do some new businesses thrive and some fail? What helps a new business succeed? Industry knowledge, business and financial planning, and good management. Small geothermal businesses are no different. Low- and medium-temperature geothermal resources exist throughout the western United States, the majority not yet tapped. A recent survey of ten western states identified more than 9,000 thermal wells and springs, over 900 low- to moderate-temperature geothermal resource areas, and hundreds of direct-use sites. Many opportunities exist for geothermal entrepreneurs to develop many of these sites into thriving small businesses. The ''Geothermal Small Business Workbook'' (''Workbook'') was written to give geothermal entrepreneurs, small businesses, and developers the tools they need to understand geothermal applications--both direct use and small-scale power generation--and to write a business and financing plan. The Workbook will: Provide background, market, and regulatory data for direct use and small-scale (< 1 megawatt) power generation geothermal projects; Refer you to several sources of useful information including owners of existing geothermal businesses, trade associations, and other organizations; Break down the complicated and sometimes tedious process of writing a business plan into five easy steps; Lead you--the geothermal entrepreneur, small company, or project developer--step-by-step through the process needed to structure a business and financing plan for a small geothermal project; and Help you develop a financing plan that can be adapted and taken to potential financing sources. The Workbook will not: Substitute for financial advice; Overcome the high exploration, development, and financing costs associated with smaller geothermal projects; Remedy the lack of financing for the exploration stage of a geothermal project; or Solve financing problems that are not related to the economic soundness of your project or are caused by things outside of your control.

  4. GEOTHERMAL PILOT STUDY FINAL REPORT: CREATING AN INTERNATIONAL GEOTHERMAL ENERGY COMMUNITY

    E-Print Network [OSTI]

    Bresee, J. C.

    2011-01-01

    of Geothermal Energy . . . . . . . . . INTRODUCTION. m C.A N INTERNATIONAL GEOTHERMAL ENERGY COMMUNITY J U N E 1978 Il i c a t i o n s of Geothermal Energy Substudy Participants

  5. STATUS OF GEOTHERMAL RESERVOIR ENGINEERING RESEARCH PROJECTS SUPPORTED BY USDOE/DIVISION OF GEOTHERMAL ENERGY

    E-Print Network [OSTI]

    Howard, J.H.

    2011-01-01

    BY USDOE/DIVISION OF GEOTHERMAL ENERGY J J. H. Howard and W.BY USWE/DIVISION O GEOTHERMAL ENERGY F Berkeley, CaliforniaWE), Division of Geothermal Energy (mS) proposed that

  6. Geothermal Policymakers Guidebook, State-by-state Developers' Checklist, & Geothermal Developers' Financing Handbook

    Broader source: Energy.gov [DOE]

    Project objectives: Assist policymakers in identifying the niche they can fill to reduce barriers to geothermal energy development. Empower local leaders to develop policies that facilitate growth of geothermal energy and prepare the local workforce to serve geothermal industry needs.

  7. STATUS OF GEOTHERMAL RESERVOIR ENGINEERING RESEARCH PROJECTS SUPPORTED BY USDOE/DIVISION OF GEOTHERMAL ENERGY

    E-Print Network [OSTI]

    Howard, J.H.

    2011-01-01

    the authors. Wairakei geothermal field: Lawrence BerkeleyR. C. , Evaluation of potential geothermal well-head and17, "S"r78" for use in geothermal reservoir 25 p. (LBL-

  8. Department of Energy Offers $102 Million Conditional Commitment...

    Energy Savers [EERE]

    Geothermal Project Geothermal Home About the Geothermal Technologies Office Enhanced Geothermal Systems Hydrothermal Resources Low-Temperature & Coproduced Resources Systems...

  9. Geothermal Heat Pumps are Scoring High Marks

    SciTech Connect (OSTI)

    2000-08-01

    Geothermal Energy Program Office of Geothermal and Wind Technologies Geothermal Heat Pumps are Scoring High Marks Geothermal heat pumps, one of the clean energy technology stars Geothermal heat pumps (GHPs) are one of the most cost-effective heating, cooling, and water heating systems available for both residential and commercial buildings. GHPs extract heat from the ground during the heating season and discharge waste heat to the ground during the cooling season. The U.S. Environmental Protecti

  10. Geothermal Technologies Program Blue Ribbon Panel Recommendations

    SciTech Connect (OSTI)

    none,

    2011-06-17

    The Geothermal Technologies Program assembled a geothermal Blue Ribbon Panel on March 22-23, 2011 in Albuquerque, New Mexico for a guided discussion on the future of geothermal energy in the United States and the role of the DOE Program. The Geothermal Blue Ribbon Panel Report captures the discussions and recommendations of the experts. An addendum is available here: http://www.eere.energy.gov/geothermal/pdfs/gtp_blue_ribbon_panel_report_addendum10-2011.pdf

  11. Development of Models to Simulate Tracer Tests for Characterization of Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Williams, Mark D.; Reimus, Paul; Vermeul, Vincent R.; Rose, Peter; Dean, Cynthia A.; Watson, Tom B.; Newell, D.; Leecaster, Kevin; Brauser, Eric

    2013-05-01

    A recent report found that power and heat produced from enhanced (or engineered) geothermal systems (EGSs) could have a major impact on the U.S energy production capability while having a minimal impact on the environment. EGS resources differ from high-grade hydrothermal resources in that they lack sufficient temperature distribution, permeability/porosity, fluid saturation, or recharge of reservoir fluids. Therefore, quantitative characterization of temperature distributions and the surface area available for heat transfer in EGS is necessary for the design and commercial development of the geothermal energy of a potential EGS site. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate this characterization. This project was initially focused on tracer development with the application of perfluorinated tracer (PFT) compounds, non-reactive tracers used in numerous applications from atmospheric transport to underground leak detection, to geothermal systems, and evaluation of encapsulated PFTs that would release tracers at targeted reservoir temperatures. After the 2011 midyear review and subsequent discussions with the U.S. Department of Energy Geothermal Technology Program (GTP), emphasis was shifted to interpretive tool development, testing, and validation. Subsurface modeling capabilities are an important component of this project for both the design of suitable tracers and the interpretation of data from in situ tracer tests, be they single- or multi-well tests. The purpose of this report is to describe the results of the tracer and model development for simulating and conducting tracer tests for characterizing EGS parameters.

  12. Whole Algae Hydrothermal Liquefaction Technology Pathway

    SciTech Connect (OSTI)

    Biddy, Mary J.; Davis, Ryan; Jones, Susanne B.; Zhu, Yunhua

    2013-03-31

    In support of the Bioenergy Technologies Office, the National Renewable Energy Laboratory (NREL) and the Pacific Northwest National Laboratory (PNNL) are undertaking studies of biomass conversion technologies to hydrocarbon fuels to identify barriers and target research toward reducing conversion costs. Process designs and preliminary economic estimates for each of these pathway cases were developed using rigorous modeling tools (Aspen Plus and Chemcad). These analyses incorporated the best information available at the time of development, including data from recent pilot and bench-scale demonstrations, collaborative industrial and academic partners, and published literature and patents. This pathway case investigates the feasibility of using whole wet microalgae as a feedstock for conversion via hydrothermal liquefaction. Technical barriers and key research needs have been assessed in order for the hydrothermal liquefaction of microalgae to be competitive with petroleum-derived gasoline, diesel and jet range blendstocks.

  13. Hydrothermally Deposited Rock | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas: Energy Resources JumpNewTexas:Hydrothermally Deposited Rock Jump to: navigation,

  14. Whole Algae Hydrothermal Liquefaction | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing ToolInternationalReport FY2014 -Energy Costs by IncreasingWhole Algae Hydrothermal

  15. Hydrothermal Exploration Data Gap Analysis Update

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12,ExecutiveFinancingR Walls -Hydro-PacHydronic Systems:TechnologyHydrothermal

  16. Hydrothermal Resources Fact Sheet | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuelsof Energy ServicesContractingManagement »Hydrogen and FuelHydrothermal

  17. Hydrothermal reaction of fly ash. Final report

    SciTech Connect (OSTI)

    Brown, P.W.

    1994-12-31

    The reactions which occur when fly ash is treated under hydrothermal conditions were investigated. This was done for the following primary reasons. The first of these is to determine the nature of the phases that form to assess the stabilities of these phases in the ambient environment and, finally, to assess whether these phases are capable of sequestering hazardous species. The second reason for undertaking this study was whether, depending on the composition of the ash and the presence of selected additives, it would be possible under hydrothermal conditions to form compounds which have cementitious properties. Formation of four classes of compounds, which bracket likely fly ash compositional ranges, were selected for study. The classes are calcium silicate hydrates, calcium selenates, and calcium aluminosulfates, and silicate-based glasses. Specific compounds synthesized were determined and their stability regions assessed. As part of stability assessment, the extent to which selected hazardous species are sequestered was determined. Finally, the cementing properties of these compounds were established. The results obtained in this program have demonstrated that mild hydrothermal conditions can be employed to improve the reactivity of fly ash. Such improvements in reactivity can result in the formation of monolithic forms which may exhibit suitable mechanical properties for selected applications as building materials. If the ashes involved are considered hazardous, the mechanical properties exhibited indicated the forms could be handled in a manner which facilitates their disposal.

  18. NREL Geothermal Policymakers' Guidebooks Web site (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-10-01

    This document highlights the NREL Geothermal Policymakers' Guidebooks Web site, including the five steps to effective geothermal policy development for geothermal electricity generation and geothermal heating and cooling technologies.

  19. What is an Enhanced Geothermal System (EGS)? Fact Sheet

    SciTech Connect (OSTI)

    U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy

    2012-09-14

    This Geothermal Technologies Office fact sheet explains how engineered geothermal reservoirs called Enhanced Geothermal Systems are used to produce energy from geothermal resources that are otherwise not economical due to a lack of fluid and/or permeability.

  20. Sandia Energy - Geothermal

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid youOxygen GenerationTechnologiesEnergyGeoscience Home ClimateGeothermal

  1. Geothermal Resources Council's 36

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journalvivo Low-Dose Low LET IonizingGeorge B.ThousandGeosciencesGeothermal

  2. Geothermal | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice ofofWindUpcomingcan I find moreGeothermal energy plant at The

  3. Geothermal initiatives in Central America

    SciTech Connect (OSTI)

    Hanold, R.J.; Loose, V.W.; Laughlin, A.W.; Wade, P.E.

    1986-01-01

    The US Agency for International Development is supporting a new project in energy and resources exploitation for Central America. One of the largest components of the project involves exploration and reservoir development investigations directed at enhancing the production of electricity from the region's geothermal resources. An assessment of the geothermal resources of Honduras is in progress, and interesting geothermal regions in the Guanacaste Province of Costa Rica are being explored. Well-logging activities are in progress in the production wells at the Miravalles geothermal field in Costa Rica, and preparations are being made for logging critical wells at Ahuachapan in El Salvador. A self-contained logging truck, complete with high-temperature logging cable and logging tools designed for geothermal service, is being fabricated and will be made available for dedicated use throughout Central America. Geochemical and isotopic analyses of water samples collected in Panama are being evaluated to select a high-priority geothermal site in that country. Application of low- and medium-enthalpy geothermal fluids for industrial and agricultural processes is being investigated in Guatemala.

  4. H.R. 1137: A Bill to amend the Geothermal Steam Act of 1970 (30 U.S.C. 1001-1027), and for other purposes. Introduced in the House of Representatives, One Hundred Third Congress, First Session, February 24, 1993 and November 15, 1993

    SciTech Connect (OSTI)

    NONE

    1993-12-31

    H.R. 1137 is a bill to amend the Geothermal Steam Act of 1970. The purpose of this Act is to require the Secretary of the Interior to take the necessary actions to preserve and protect the hydrothermal system associated with, Yellowstone National Park. The proposed legislative text is included.

  5. Low-Temperature, Coproduced, and Geopressured Geothermal Technologies...

    Office of Environmental Management (EM)

    and Geopressured Geothermal Technologies Strategic Action Plan, September 2010 Low-Temperature, Coproduced, and Geopressured Geothermal Technologies Strategic Action...

  6. Working Fluids and Their Effect on Geothermal Turbines

    Broader source: Energy.gov [DOE]

    DOE Geothermal Program Peer Review 2010 - Presentation. Project objective: Identify new working fluids for binary geothermal plants.

  7. Integrated seismic studies at the Rye Patch Geothermal Reservoir, Nevada

    E-Print Network [OSTI]

    Gritto, Roland; Daley, Thomas M.; Majer, Ernest L.

    2002-01-01

    most geothermal areas provide access to open boreholesand borehole experiments were conducted at the Rye Patch geothermal

  8. Compound and Elemental Analysis At International Geothermal Area...

    Open Energy Info (EERE)

    Compound and Elemental Analysis At International Geothermal Area, Philippines (Wood, 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

  9. Aeromagnetic Survey At Blue Mountain Geothermal Area (Fairbank...

    Open Energy Info (EERE)

    Aeromagnetic Survey At Blue Mountain Geothermal Area (Fairbank Engineering Ltd, 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

  10. Compound and Elemental Analysis At International Geothermal Area...

    Open Energy Info (EERE)

    Compound and Elemental Analysis At International Geothermal Area, Indonesia (Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

  11. Geographic Information System At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geographic Information System At Lightning Dock Geothermal Area (Getman, 2014) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geographic...

  12. Geothermal Data Aggregation: Submission of Information into the

    Broader source: Energy.gov [DOE]

    Project objective: High quality information supporting geothermal research and development will be submitted to the National Geothermal Data System (NGDS).

  13. Exploratory Boreholes At Blue Mountain Geothermal Area (Parr...

    Open Energy Info (EERE)

    Exploratory Boreholes At Blue Mountain Geothermal Area (Parr & Percival, 1991) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Exploratory...

  14. Geothermal Technologies Program Multi-Year Research, Development...

    Broader source: Energy.gov (indexed) [DOE]

    programmanagement.pdf More Documents & Publications Geothermal Technologies Program Multi-Year Research, Development and Demonstration Plan: Appendices Geothermal Technologies...

  15. Energy Department Develops Regulatory Roadmap to Spur Geothermal...

    Broader source: Energy.gov (indexed) [DOE]

    Energy Development Energy Department Announces Project Selections for Enhanced Geothermal Systems (EGS) Subsurface Laboratory Geothermal energy, traditionally a baseload...

  16. Energy Department Announces Project Selections for Enhanced Geothermal...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Announces Project Selections for Enhanced Geothermal Systems (EGS) Subsurface Laboratory Energy Department Announces Project Selections for Enhanced Geothermal Systems (EGS)...

  17. The Hydrothermal Outflow Plume of Valles Caldera, New Mexico...

    Open Energy Info (EERE)

    are parents to mixed fluids flowing in the hydrothermal plume. However, isotopic data, borehole data, basic geology, and inverse relations between temperature and chloride...

  18. Hydrothermal Heat Discharge In The Cascade Range, Northwestern...

    Open Energy Info (EERE)

    United States Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Hydrothermal Heat Discharge In The Cascade Range, Northwestern United States...

  19. New Evidence On The Hydrothermal System In Long Valley Caldera...

    Open Energy Info (EERE)

    Hydrothermal System In Long Valley Caldera, California, From Wells, Fluid Sampling, Electrical Geophysics, And Age Determinations Of Hot-Spring Deposits Jump to: navigation,...

  20. Altered Tectonic and Hydrothermal Breccias in Corehole VC-1,...

    Open Energy Info (EERE)

    origin. Hydrothermal breccias and associated crackle zones or stockworks created by hydraulic fracturing can provide significant secondary permeability, as demonstrated by...

  1. Development of a Hydrothermal Spallation Drilling System for EGS

    Broader source: Energy.gov [DOE]

    Project objective: Build and demonstrate a working prototype hydrothermal spallation drilling unit that will accelerate commercial deployment of EGS as a domestic energy resource.

  2. Temporal Relations of Volcanism and Hydrothermal Systems in Two...

    Open Energy Info (EERE)

    Geology, 1989 DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for Temporal Relations of Volcanism and Hydrothermal Systems in Two Areas of...

  3. An Overview of Hydrothermal Alteration and Vein Mineralization...

    Open Energy Info (EERE)

    Overview of Hydrothermal Alteration and Vein Mineralization in Continental Scientific Drilling Program Core Hole VC-2B, Valles Caldera, New Mexico Jump to: navigation, search...

  4. Robust optimization based self scheduling of hydro-thermal Genco ...

    E-Print Network [OSTI]

    Dec 29, 2013 ... Abstract: This paper proposes a robust optimization model for optimal self scheduling of a hydro-thermal generating company. The proposed ...

  5. MEMS Materials and Temperature Sensors for Down Hole Geothermal System Monitoring

    E-Print Network [OSTI]

    Wodin-Schwartz, Sarah

    2013-01-01

    Geothermal EnergyThe future of geothermal energy: Impact of enhanceddown-hole monitoring of geothermal energy systems. ASME 2011

  6. A COMPARISON OF ESTIMATED AND BACKGROUND SUBSIDENCE RATES IN TEXAS-LOUISIANA GEOPRESSURED GEOTHERMAL AREAS

    E-Print Network [OSTI]

    Lee, L.M.

    2010-01-01

    Potential geopressured geothermal-related subsidence ratesto Potential Geopressured Geothermal-RelatedSubsidence Ratesmm). Potential geopressured geothermal-related rubaidence

  7. Pressure analysis of the hydromechanical fracture behaviour in stimulated tight sedimentary geothermal reservoirs

    E-Print Network [OSTI]

    Wessling, S.

    2009-01-01

    Geothermal; Enhanced Geothermal Systems; Huff-puff process;viability of an Enhanced Geothermal System not only depends

  8. Topographic and Air-Photo Lineaments in Various Locations Related to Geothermal Exploration in Colorado

    SciTech Connect (OSTI)

    Zehner, Richard

    2012-02-01

    Title: Topographic and Air-Photo Lineaments in Various Locations Related to Geothermal Exploration in Colorado Tags: Colorado, lineaments, air-photo, geothermal Summary: These line shapefiles trace apparent topographic and air-photo lineaments in various counties in Colorado. It was made in order to identify possible fault and fracture systems that might be conduits for geothermal fluids, as part of a DOE reconnaissance geothermal exploration program. Description: Geothermal fluids commonly utilize fault and fractures in competent rocks as conduits for fluid flow. Geothermal exploration involves finding areas of high near-surface temperature gradients, along with a suitable “plumbing system” that can provide the necessary permeability. Geothermal power plants can sometimes be built where temperature and flow rates are high. This line shapefile is an attempt to use desktop GIS to delineate possible faults and fracture orientations and locations in highly prospective areas prior to an initial site visit. Geochemical sampling and geologic mapping could then be centered around these possible faults and fractures. To do this, georeferenced topographic maps and aerial photographs were utilized in an existing GIS, using ESRI ArcMap 10.0 software. The USA_Topo_Maps and World_Imagery map layers were chosen from the GIS Server at server.arcgisonline.com, using a UTM Zone 13 NAD27 projection. This line shapefile was then constructed over that which appeared to be through-going structural lineaments in both the aerial photographs and topographic layers, taking care to avoid manmade features such as roads, fence lines, and utility right-of-ways. Still, it is unknown what actual features these lineaments, if they exist, represent. Although the shapefiles are arranged by county, not all areas within any county have been examined for lineaments. Work was focused on either satellite thermal infrared anomalies, known hot springs or wells, or other evidence of geothermal systems. Finally, lineaments may be displaced somewhat from their actual location, due to such factors as shadow effects with low sun angles in the aerial photographs. Projection Information: UTM Zone 13 NAD 27 projection Credits: These lineament shapefile was created by Geothermal Development Associates, as part of a geothermal geologic reconnaissance performed by Flint Geothermal, LLC, of Denver Colorado. Funding was provided in part by DOE Grant DE-EEE0002828. Use Limitation These shapefiles was constructed as an aid to geothermal exploration in preparation for a site visit for field checking. We make no claims as to the existence of the lineaments, their location, orientation, and/or nature.

  9. Geothermal energy abstract sets. Special report No. 14

    SciTech Connect (OSTI)

    Stone, C.

    1985-01-01

    This bibliography contains annotated citations in the following areas: (1) case histories; (2) drilling; (3) reservoir engineering; (4) injection; (5) geothermal well logging; (6) environmental considerations in geothermal development; (7) geothermal well production; (8) geothermal materials; (9) electric power production; (10) direct utilization of geothermal energy; (11) economics of geothermal energy; and (12) legal, regulatory and institutional aspects. (ACR)

  10. Analysis of Injection-Induced Micro-Earthquakes in a Geothermal Steam Reservoir, The Geysers Geothermal Field, California

    E-Print Network [OSTI]

    Rutqvist, J.

    2008-01-01

    long-lived enhanced geothermal system (EGS) in the Northernis a vapor dominated geothermal reservoir system, which is

  11. Temporary Cementitious Sealers in Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Sugama T.; Pyatina, T.; Butcher, T.; Brothers, L.; Bour, D.

    2011-12-31

    Unlike conventional hydrothennal geothermal technology that utilizes hot water as the energy conversion resources tapped from natural hydrothermal reservoir located at {approx}10 km below the ground surface, Enhanced Geothermal System (EGS) must create a hydrothermal reservoir in a hot rock stratum at temperatures {ge}200 C, present in {approx}5 km deep underground by employing hydraulic fracturing. This is the process of initiating and propagating a fracture as well as opening pre-existing fractures in a rock layer. In this operation, a considerable attention is paid to the pre-existing fractures and pressure-generated ones made in the underground foundation during drilling and logging. These fractures in terms of lost circulation zones often cause the wastage of a substantial amount of the circulated water-based drilling fluid or mud. Thus, such lost circulation zones must be plugged by sealing materials, so that the drilling operation can resume and continue. Next, one important consideration is the fact that the sealers must be disintegrated by highly pressured water to reopen the plugged fractures and to promote the propagation of reopened fractures. In response to this need, the objective of this phase I project in FYs 2009-2011 was to develop temporary cementitious fracture sealing materials possessing self-degradable properties generating when {ge} 200 C-heated scalers came in contact with water. At BNL, we formulated two types of non-Portland cementitious systems using inexpensive industrial by-products with pozzolanic properties, such as granulated blast-furnace slag from the steel industries, and fly ashes from coal-combustion power plants. These byproducts were activated by sodium silicate to initiate their pozzolanic reactions, and to create a cemetitious structure. One developed system was sodium silicate alkali-activated slag/Class C fly ash (AASC); the other was sodium silicate alkali-activated slag/Class F fly ash (AASF) as the binder of temper-try sealers. Two specific additives without sodium silicate as alkaline additive were developed in this project: One additive was the sodium carboxymethyl cellulose (CMC) as self-degradation promoting additive; the other was the hard-burned magnesium oxide (MgO) made from calcinating at 1,000-1,500 C as an expansive additive. The AASC and AASF cementitious sealers made by incorporating an appropriate amount of these additives met the following six criteria: 1) One dry mix component product; 2) plastic viscosity, 20 to 70 cp at 300 rpm; 3) maintenance of pumpability for at least 1 hour at 85 C; 4) compressive strength >2000 psi; 5) self-degradable by injection with water at a certain pressure; and 6) expandable and swelling properties; {ge}0.5% of total volume of the sealer.

  12. Geothermal Energy Production With Innovative Methods Of Geothermal Heat Recovery

    SciTech Connect (OSTI)

    Swenson, Allen; Darlow, Rick; Sanchez, Angel; Pierce, Michael; Sellers, Blake

    2014-12-19

    The ThermalDrive™ Power System (“TDPS”) offers one of the most exciting technological advances in the geothermal power generation industry in the last 30 years. Using innovations in subsurface heat recovery methods, revolutionary advances in downhole pumping technology and a distributed approach to surface power production, GeoTek Energy, LLC’s TDPS offers an opportunity to change the geothermal power industry dynamics.

  13. Geothermal Data from the National Geothermal Data System (NGDS)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The National Geothermal Data System (NGDS) is a distributed data system providing access to information resources related to geothermal energy from a network of data providers. Data are contributed by academic researchers, private industry, and state and federal agencies. Built on a scalable and open platform through the U.S. Geoscience Information Network (USGIN), NGDS respects data provenance while promoting shared resources.Since NGDS is built using a set of open protocols and standards, relying on the Open Geospatial Consortium (OGC) and International Organization for Standardization (ISO), members of the community may access the data in a variety of proprietary and open-source applications and software. In addition, developers can add functionality to the system by creating new applications based on the open protocols and standards of the NGDS. The NGDS, supported by the U.S. Department of Energy’s Geothermal Technology Program, is intended to provide access to all types of geothermal data to enable geothermal analysis and widespread public use in an effort to reduce the risk of geothermal energy development [copied from http://www.geothermaldata.org/page/about]. See the long list of data contributors at http://geothermaldata.org/page/data-types-and-contributors#data-contributors.

  14. Numerical modeling of water injection into vapor-dominated geothermal reservoirs

    E-Print Network [OSTI]

    Pruess, Karsten

    2008-01-01

    Renewable Energy, Office of Geothermal Technologies, of theTransport in Fractured Geothermal Reservoirs, Geothermics,Depletion of Vapor-Dominated Geothermal Reservoirs, Lawrence

  15. The Impact of Injection on Seismicity at The Geyses, California Geothermal Field

    E-Print Network [OSTI]

    Majer, Ernest L.; Peterson, John E.

    2008-01-01

    long-lived enhanced geothermal system (EGS) in the NorthernGeothermal, Enhanced Geothermal Systems Abstract Waterinjection into geothermal systems has often become a

  16. Strategies for Detecting Hidden Geothermal Systems by Near-Surface Gas Monitoring

    E-Print Network [OSTI]

    Lewicki, Jennifer L.; Oldenburg, Curtis M.

    2004-01-01

    Mahon, Chemistry and Geothermal Systems, Academic Press, NewHidden Geothermal Systems geothermal origin. However, thesefor Detection of Hidden Geothermal Systems Figure 7.4.

  17. Best Practices for Addressing Induced Seismicity Associated with Enhanced Geothermal Systems (EGS)

    E-Print Network [OSTI]

    Majer, E.

    2014-01-01

    associated with Enhanced Geothermal Systems. Report producedassociated with Enhanced Geothermal Systems: Geothermics, v.associated with Enhanced Geothermal Systems, DOE/EE-0662, 45

  18. The Impact of Injection on Seismicity at The Geyses, California Geothermal Field

    E-Print Network [OSTI]

    Majer, Ernest L.; Peterson, John E.

    2008-01-01

    for a long-lived enhanced geothermal system (EGS) in theGeothermal, Enhanced Geothermal Systems Abstract Wateri.e. , enhanced geothermal systems, (EGS). Presented in this

  19. Geothermal energy for American Samoa

    SciTech Connect (OSTI)

    Not Available

    1980-03-01

    The geothermal commercialization potential in American Samoa was investigated. With geothermal energy harnessed in American Samoa, a myriad of possibilities would arise. Existing residential and business consumers would benefit from reduced electricity costs. The tuna canneries, demanding about 76% of the island's process heat requirements, may be able to use process heat from a geothermal source. Potential new industries include health spas, aquaculture, wood products, large domestic and transhipment refrigerated warehouses, electric cars, ocean nodule processing, and a hydrogen economy. There are no territorial statutory laws of American Samoa claiming or reserving any special rights (including mineral rights) to the territorial government, or other interests adverse to a land owner, for subsurface content of real property. Technically, an investigation has revealed that American Samoa does possess a geological environment conducive to geothermal energy development. Further studies and test holes are warranted.

  20. Geothermal Program Review IV: proceedings

    SciTech Connect (OSTI)

    Not Available

    1985-01-01

    The research and development program of DOE's Geothermal Technology Division is reviewed in separate presentations according to program area. Separate abstracts have been prepared for the individual papers. (ACR)

  1. Wind and Geothermal Incentives Program

    Broader source: Energy.gov [DOE]

    The program will offer support for wind and geothermal technologies in the form of loans, grants and loan guarantees (i.e., grants to be used in the event of a financing default). The definition...

  2. Hawaii geothermal resource assessment: 1982

    SciTech Connect (OSTI)

    Thomas, D.M.; Cox, M.; Kavahikaua, J.P.; Lienert, B.R.; Mattice, M.

    1982-10-01

    The Geothermal Resource Assessment Program of the Hawaii Institute of Geophysics has conducted a series of geochemical and geophysical surveys throughout the State of Hawaii since February 1978. The results compiled during this study have been used to prepare a map of potential geothermal resource areas throughout the state. Approximately thirteen separate locations on three islands have been studied in detail. Of these, four areas are known to have direct evidence of a geothermal anomaly (Kilauea East Rift Zone, Kilauea Southwest Rift Zone, Kawaihae, and Olowalu-Ukumehame) and three others are strongly suspected of having at least a low-temperature resource (Hualalai west flank, Haleakala Southwest Rift, and Lualualei Valley). In the remainder of the areas surveyed, the data obtained either were contradictory or gave no evidence of a geothermal resource.

  3. Geothermal Heat Pump Grant Program

    Broader source: Energy.gov [DOE]

    The definition of geothermal heat pump property does not include swimming pools, hot tubs, or any other energy storage device that has a primary function other than storage. In addition, systems...

  4. Energy 101: Geothermal Heat Pumps

    Broader source: Energy.gov [DOE]

    An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe ...

  5. Geothermal Permeability Enhancement - Final Report

    SciTech Connect (OSTI)

    Joe Beall; Mark Walters

    2009-06-30

    The overall objective is to apply known permeability enhancement techniques to reduce the number of wells needed and demonstrate the applicability of the techniques to other undeveloped or under-developed fields. The Enhanced Geothermal System (EGS) concept presented in this project enhances energy extraction from reduced permeability zones in the super-heated, vapor-dominated Aidlin Field of the The Geysers geothermal reservoir. Numerous geothermal reservoirs worldwide, over a wide temperature range, contain zones of low permeability which limit the development potential and the efficient recovery of heat from these reservoirs. Low permeability results from poorly connected fractures or the lack of fractures. The Enhanced Geothermal System concept presented here expands these technologies by applying and evaluating them in a systematic, integrated program.

  6. Decision analysis for geothermal energy

    E-Print Network [OSTI]

    Yost, Keith A

    2012-01-01

    One of the key impediments to the development of enhanced geothermal systems is a deficiency in the tools available to project planners and developers. Weak tool sets make it difficult to accurately estimate the cost and ...

  7. Changes in Surficial Features Associated with Geothermal Development...

    Open Energy Info (EERE)

    discharge, increase in fumarolic discharge, heat induced vegetation kills, and land subsidence. Factors responsible for such changes include seismic activity and related ground...

  8. Geothermal Development and Changes in Surficial Features: Examples...

    Open Energy Info (EERE)

    of declines in thermal-water discharge, increases in fumarolic steam discharge, and subsidence. At other areas noted above, similar types of changes have occurred but existing...

  9. Digital Mapping Of Structurally Controlled Geothermal Features With GPS

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, Alabama (UtilityInstrumentsArea (DOE GTP) Jump to:SouthBar,eólicoDidionGas IncUnits

  10. Category:Modern Geothermal Features | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmentalBowerbank,CammackFLIR Jump to: navigation,Ground GravityListsMercury VaporModern

  11. Category:Relict Geothermal Features | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmentalBowerbank,CammackFLIR Jump to:RAPID Roadmap Contact PropertiesCategoryRelict

  12. Digital Mapping Of Structurally Controlled Geothermal Features With Gps

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePower VenturesInformation9)ask queries TypeDeveloper|WindsDifwind

  13. Changes in Surficial Features Associated with Geothermal Development in

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButte County,Camilla,Thermal Gradient HolesCentral,Chandler Hills Wind FarmLong

  14. Geothermal Heating and Cooling Systems Featured on NBC Nightly News |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12,Executive Compensation References:SequestrationElectric PlantDepartment of

  15. Analyses of mixed-hydrocarbon binary thermodynamic cycles for moderate-temperature geothermal resources

    SciTech Connect (OSTI)

    Demuth, O.J.

    1981-02-01

    A number of binary geothermal cycles utilizing mixed hydrocarbon working fluids were analyzed with the overall objective of finding a working fluid which can produce low-cost electrical energy using a moderately-low temperature geothermal resource. Both boiling and supercritical shell-and-tube cycles were considered. The performance of a dual-boiling isobutane cycle supplied by a 280/sup 0/F hydrothermal resource (corresponding to the 5 MW pilot plant at the Raft River site in Idaho) was selected as a reference. To investigate the effect of resource temperature on the choice of working fluid, several analyses were conducted for a 360/sup 0/F hydrothermal resource, which is representative of the Heber resource in California. The hydrocarbon working fluids analyzed included methane, ethane, propane, isobutane, isopentane, hexane, heptane, and mixtures of those pure hydrocarbons. For comparison, two fluorocarbon refrigerants were also analyzed. These fluorocarbons, R-115 and R-22, were suggested as resulting in high values of net plant geofluid effectiveness (watt-hr/lbm geofluid) at the two resource temperatures chosen for the study. Preliminary estimates of relative heat exchanger size (product of overall heat transfer coefficient times heater surface area) were made for a number of the better performing cycles.

  16. Hydrothermal synthesis of hexagonal magnesium hydroxide nanoflakes

    SciTech Connect (OSTI)

    Wang, Qiang, E-mail: qwchem@gmail.com [Laboratory for Micro-sized Functional Materials and College of Elementary Education, Capital Normal University, Beijing 100048 (China); Li, Chunhong [National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190 (China); Guo, Ming [Laboratory for Micro-sized Functional Materials and College of Elementary Education, Capital Normal University, Beijing 100048 (China); Sun, Lingna [ShenZhen Key Laboratory of Functional Polymer, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060 (China); Hu, Changwen [Key Laboratory of Cluster Science of Ministry of Education of China, The Institute for Chemical Physics and Department of Chemistry, Beijing Institute of Technology, Beijing 100081 (China)

    2014-03-01

    Graphical abstract: Hexagonal Mg(OH){sub 2} nanoflakes were synthesized via hydrothermal method in the presence of PEG-20,000. Results show that PEG-20,000 plays an important role in the formation of this kind of nanostructure. The SAED patterns taken from the different positions on a single hexagonal Mg(OH){sub 2} nanoflake yielded different crystalline structures. The structure of the nanoflakes are polycrystalline and the probable formation mechanism of Mg(OH){sub 2} nanoflakes is discussed. - Highlights: • Hexagonal Mg(OH){sub 2} nanoflakes were synthesized via hydrothermal method. • PEG-20,000 plays an important role in the formation of hexagonal nanostructure. • Mg(OH){sub 2} nanoflakes show different crystalline structures at different positions. • The probable formation mechanism of hexagonal Mg(OH){sub 2} nanoflakes was reported. - Abstract: Hexagonal magnesium hydroxide (Mg(OH){sub 2}) nanoflakes were successfully synthesized via hydrothermal method in the presence of the surfactant polyethylene glycol 20,000 (PEG-20,000). Results show that PEG-20,000 plays an important role in the formation of this kind of nanostructure. The composition, morphologies and structure of the Mg(OH){sub 2} nanoflakes were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), and selected area electron diffraction (SAED). The SAED patterns taken from the different positions on a single hexagonal Mg(OH){sub 2} nanoflake show different crystalline structures. The structure of the nanoflakes are polycrystalline and the probable formation mechanism of Mg(OH){sub 2} nanoflakes is discussed. Brunauer–Emmett–Teller (BET) analysis were performed to investigate the porous structure and surface area of the as-obtained nanoflakes.

  17. Geothermal Money Book [Geothermal Outreach and Project Financing

    SciTech Connect (OSTI)

    Elizabeth Battocletti

    2004-02-01

    Small business lending is big business and growing. Loans under $1 million totaled $460 billion in June 2001, up $23 billion from 2000. The number of loans under $100,000 continued to grow at a rapid rate, growing by 10.1%. The dollar value of loans under $100,000 increased 4.4%; those of $100,000-$250,000 by 4.1%; and those between $250,000 and $1 million by 6.4%. But getting a loan can be difficult if a business owner does not know how to find small business-friendly lenders, how to best approach them, and the specific criteria they use to evaluate a loan application. This is where the Geothermal Money Book comes in. Once a business and financing plan and financial proposal are written, the Geothermal Money Book takes the next step, helping small geothermal businesses locate and obtain financing. The Geothermal Money Book will: Explain the specific criteria potential financing sources use to evaluate a proposal for debt financing; Describe the Small Business Administration's (SBA) programs to promote lending to small businesses; List specific small-business friendly lenders for small geothermal businesses, including those which participate in SBA programs; Identify federal and state incentives which are relevant to direct use and small-scale (< 1 megawatt) power generation geothermal projects; and Provide an extensive state directory of financing sources and state financial incentives for the 19 states involved in the GeoPowering the West (GPW). GPW is a U.S. Department of Energy-sponsored activity to dramatically increase the use of geothermal energy in the western United States by promoting environmentally compatible heat and power, along with industrial growth and economic development. The Geothermal Money Book will not: Substitute for financial advice; Overcome the high exploration, development, and financing costs associated with smaller geothermal projects; Remedy the lack of financing for the exploration stage of a geothermal project; or Solve financing problems that are not related to the economic soundness of your project or are caused by things outside of your control.

  18. Dynamics of hydrothermal seeps from the Salton Sea geothermal system (California, USA) constrained by temperature monitoring

    E-Print Network [OSTI]

    Podladchikov, Yuri

    by temperature monitoring and time series analysis Henrik Svensen,1 Øyvind Hammer,1 Adriano Mazzini,1 Nathan by monitoring the temperature of two pools and two gryphons for 2180 h (90.8 days) in the period from December is evident from a second period of temperature monitoring of one of the pools from December 2007 to April

  19. Porosity, permeability and fluid flow in the YellowstoneGeothermal System, Wyoming

    SciTech Connect (OSTI)

    Dobson, Patrick F.; Kneafsey, Timothy J.; Hulen, Jeffrey; Simmons, Ardyth

    2002-03-29

    Cores from two of 13 U.S. Geological Survey (USGS) research holes at Yellowstone National Park (Y-5 and Y-8) were evaluated to characterize lithology, texture, alteration, and the degree and nature of fracturing and veining. Porosity and matrix permeability measurements and petrographic examination of the cores were used to evaluate the effects of lithology and hydrothermal alteration on porosity and permeability. The intervals studied in these two core holes span the conductive zone and the upper portion of the convective geothermal reservoir. Variations in porosity and matrix permeability observed in the Y-5 and Y-8 cores are primarily controlled by lithology. Y-8 intersects three distinct lithologies: volcaniclastic sandstone, perlitic rhyolitic lava, and nonwelded pumiceous ash-flow tuff. The sandstone typically has high permeability and porosity, and the tuff has very high porosity and moderate permeability, while the perlitic lava has very low porosity and is essentially impermeable. Hydrothermal self-sealing appears to have generated localized permeability barriers within the reservoir. Changes in pressure and temperature in Y-8 correspond to a zone of silicification in the volcaniclastic sandstone just above the contact with the perlitic rhyolite; this silicification has significantly reduced porosity and permeability. In rocks with inherently low matrix permeability (such as densely welded ash-flow tuff), fluid flow is controlled by the fracture network. The Y-5 core hole penetrates a thick intracaldera section of the0.6 Ma Lava Creek ash-flow tuff. In this core, the degree of welding appears to be responsible for most of the variations in porosity, matrix permeability, and the frequency of fractures and veins. Fractures are most abundant within the more densely welded sections of the tuff. However, the most prominent zones of fracturing and mineralization are associated with hydrothermal breccias within densely welded portions of the tuff. These breccia zones represent transient conduits of high fluid flow that formed by the explosive release of overpressure in the underlying geothermal reservoir and that were subsequently sealed by supersaturated geothermal fluids. In addition to this fracture sealing, hydrothermal alteration at Yellowstone appears generally to reduce matrix permeability and focus flow along fractures, where multiple pulses of fluid flow and self-sealing have occurred.

  20. Geothermal Resources Assessment in Hawaii

    SciTech Connect (OSTI)

    Thomas, D.M.

    1984-10-01

    The Hawaii Geothermal Resources Assessment Program was initiated in 1978. The preliminary phase of this effort identified 20 Potential Geothermal Resource Areas (PGRA's) using available geological, geochemical and geophysical data. The second phase of the Assessment Program undertook a series of field studies, utilizing a variety of geothermal exploration techniques, in an effort to confirm the presence of thermal anomalies in the identified PGRA's and, if confirmed, to more completely characterize them. A total of 15 PGRA's on four of the five major islands in the Hawaiian chain were subject to at least a preliminary field analysis. The remaining five were not considered to have sufficient resource potential to warrant study under the personnel and budget constraints of the program. The island of Kauai was not studied during the current phase of investigation. Geothermal field studies were not considered to be warranted due to the absence of significant geochemical or geophysical indications of a geothermal resource. The great age of volcanism on this island would further suggest that should a thermal resource be present, it would be of low temperature. The geothermal field studies conducted on Oahu focused on the caldera complexes of the two volcanic systems which form the island: Waianae volcano and Koolau volcano. The results of these studies and the interpreted probability for a resource are presented.