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Note: This page contains sample records for the topic "microresistivity log modeling" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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1

Synoptic: studying logged behavior with inferred models  

Science Conference Proceedings (OSTI)

Logging is a powerful method for capturing program activity and state during an execution. However, log inspection remains a tedious activity, with developers often piecing together what went on from multiple log lines and across many files. This paper ... Keywords: log analysis, model inference, synoptic, temporal invariant mining

Ivan Beschastnikh; Jenny Abrahamson; Yuriy Brun; Michael D. Ernst

2011-09-01T23:59:59.000Z

2

Logging Calibration Models for Fission Neutron Sondes (September...  

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

Logging Calibration Models for Fission Neutron Sondes (September 1981) Logging Calibration Models for Fission Neutron Sondes (September 1981) Logging Calibration Models for Fission...

3

LogGOPSim: simulating large-scale applications in the LogGOPS model  

Science Conference Proceedings (OSTI)

We introduce LogGOPSim---a fast simulation framework for parallel algorithms at large-scale. LogGOPSim utilizes a slightly extended version of the well-known LogGPS model in combination with full MPI message matching semantics and detailed simulation ... Keywords: LogGOPS model, LogGP, LogGPS, LogP, collective operations, large-scale performance, message passing interface, simulation

Torsten Hoefler; Timo Schneider; Andrew Lumsdaine

2010-06-01T23:59:59.000Z

4

A Model for Water Factor Measurements With Fission-Neutron Logging...  

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

A Model for Water Factor Measurements With Fission-Neutron Logging Tools (May 1983) A Model for Water Factor Measurements With Fission-Neutron Logging Tools (May 1983) A Model for...

5

Grade Assignments for Models Used for Calibration of Gross-Count Gamma-Ray Logging Systems (December 1983)  

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

Grade Assignments for Models Used for Calibration of Gross-Count Gamma-Ray Logging Systems (December 1983)

6

Michael Logli  

Science Conference Proceedings (OSTI)

Michael is a science writer, generating content for Inform magazine and the Oil Mill Gazetteer. Michael Logli Contact Information contact contact us Michael Logli S

7

Realtime logging  

Science Conference Proceedings (OSTI)

This article reports that measurement-while-drilling (MWD) logging services have become an important new source of drilling and geological information on wildcats and some development wells. Sensors located within the bottomhole assembly, barely a few feet above the bit, make measurements on the formation, the borehole and the drill string itself. The MWD measurements are electronically processed and stored in the logging tool downhole. Simple MWD logging systems must wait until after tripping out of the hole for the MWD data to be downloaded from the logging tool to a surface computer in order for logs to be produced. This method is acceptable for some formation evaluation problems. But when well control, directional or completion decisions must be made, the benefit of MWD logging data is obtained only if the downhole measurements are available to the engineer in realtime.

Whittaker, A.; Kashuba, M.J.

1987-01-01T23:59:59.000Z

8

Outage Log  

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

For Users Live Status Global Queue Look Scheduled Outages Outage Log Edison Login Node Status Hopper Login Node Status Hopper User Environment Monitoring Carver Login Node Status...

9

Rotting Logs  

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

55 March 2, 1946 55 March 2, 1946 Forest Preserve District of Cook County Clayton F. Smith, President Roberts Mann, Superintendent of Conservation ROTTING LOGS There is drama in a rotting log. Apparently lifeless and useless there on the ground, it harbors thousands of living things within and beneath it. Feeding on the wood of the log, living and dying, generation after generation of them, they convert it back into minerals which a fertile healthy forest soil must have. They also add the humus which not only helps the soil to hold its moisture but also aids in making the soil minerals usable as food by plants, including trees. Finally there is nothing left but crumbling punk shot through and through with the hyphae, or roots, of molds and mushrooms. Some of the common lower plant and animal forms found in a rotting log in our forest preserves are these.

10

Change Log  

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

Change Log Change Log Change Log NERSC-8 / Trinity Benchmarks Change Log 09/03/2013 Correction applied to MiniDFT web-page (to remove inconsistency with MiniDFT README). Capability Improvement measurements do not require 10,000 MPI ranks per k-point. 08/06/2013 Various pages have changed to remove "draft" status 08/02/2013 Correction added to FLOP Counts for "Small" Single-Node Miniapplication Tests page 07/12/2013 README files updated for IOR benchmark to correct an error in wording (no code changes); README file updated for osu-micro-benchmarks (OMB) changing the tests required and conditions including reinserting some tests that had been deleted earlier 07/05/2013 README updated for mpimemu benchmark; Revised version of benchmark results spreadsheet (linked on SSP web page);

11

High-energy photon transport modeling for oil-well logging  

E-Print Network (OSTI)

Nuclear oil well logging tools utilizing radioisotope sources of photons are used ubiquitously in oilfields throughout the world. Because of safety and security concerns, there is renewed interest in shifting to ...

Johnson, Erik D., Ph. D. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

12

Log Summarization  

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

Log Log Summarization and Anomaly Detection for Troubleshooting Distributed Systems Dan Gunter #1 , Brian L. Tierney #2 , Aaron Brown ∗3 , Martin Swany ∗4 , John Bresnahan !5 , Jennifer M. Schopf !6 # Lawrence Berkeley National Laboratory, Berkeley, CA, USA 1 dkgunter@lbl.gov 2 bltierney@lbl.gov ∗ University of Delaware, Newark, DE, USA 3 brown@cis.udel.edu 4 swany@cis.udel.edu ! Argonne National Laboratory, Argonne, IL, USA 5 bresnaha@mcs.anl.gov 6 jms@mcs.anl.gov Abstract- Today's system monitoring tools are capable of detecting system failures such as host failures, OS errors, and network partitions in near-real time. Unfortunately, the same cannot yet be said of the end-to-end distributed software stack. Any given action, for example, reliably transferring a directory of files, can involve a wide range of complex and interrelated actions across multiple pieces

13

Rotting Logs  

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

441-A January 22, 1972 441-A January 22, 1972 Forest Preserve District of Cook County George W. Dunne, President Roland F. Eisenbeis, Supt. of Conservation ROTTING LOGS Trees are like people. They die from diseases, infections, injuries, burns, drowning, malnutrition, and sometimes just plain old age. Walking through the woods we see, here and there, dead or dying trees of various kinds. For example: a big white oak, with its bark ripped from crown to root, was literally cooked by a bolt of lightning during a summer thunderstorm. In a grove of black oaks, many are dying lingering deaths from infected wounds started years ago when an autumn fire swept through the fallen leaves and scorched the living wood. In a dense forest there are many that have lost the battle for space and sunlight. In some places we see trees that are slowly starving because dashing rains have carried away the fertile topsoil and the trampling feet of picnickers have injured the shallow roots that bring them food.

14

Short note: A FORTRAN program to introduce field-measured sedimentary logs into reservoir modelling packages  

Science Conference Proceedings (OSTI)

Building reservoir-scale facies models of outcrops is a practice that improves the three-dimensional geological modelling of subsurface analogues. Facies modelling of outcrops can be achieved either with geostatistical or object-based methods, which ...

O. Falivene; P. Arbus; J. Howell; O. Fernndez; P. Cabello; J. A. Muoz; L. Cabrera

2006-11-01T23:59:59.000Z

15

Parameter estimation from flowing fluid temperature logging data in unsaturated fractured rock using multiphase inverse modeling  

E-Print Network (OSTI)

modeling fluid and heat flow in fractured porous media, Soc.fluid and heat flows of multiphase, multicomponent fluid mixtures in porous and fractured media.

Mukhopadhyay, S.

2009-01-01T23:59:59.000Z

16

Logging in to Edison  

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

Logging in Logging in to Edison Interactive Access You can log in to Edison using SSH (Secure Shell) with the following command from any UNIX, Mac OS X, Linux, FreeBSD, etc....

17

ILLEGAL LOGGING IN INDONESIA  

E-Print Network (OSTI)

ILLEGAL LOGGING IN INDONESIA THE ENVIRONMENTAL, ECONOMIC AND SOCIAL COSTS #12;ILLEGAL LOGGING IN INDONESIA THE ENVIRONMENTAL, ECONOMIC AND SOCIAL COSTS Contents Executive Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 #12;ILLEGAL LOGGING IN INDONESIA | 2 Executive Summary Indonesia's rainforests are the third

18

Logging in to Franklin  

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

Logging in Logging in to Franklin Interactive Access You can log in to Franklin using SSH (Secure Shell) with the following command from any UNIX, Linux, FreeBSD, etc. command...

19

Parametric investigations for extrapolation of a log-linear creep model  

Science Conference Proceedings (OSTI)

The mathematical modelling of certain nonlinear physical phenomena has traditionally been expedited by transforming an equation of the general form y=a+bx^n to a linear one by logarithms and solving for the parameters by graphical techniques or least-squares ...

S. H. Foust; K. P. Chong

1988-02-01T23:59:59.000Z

20

Process Deviation Log  

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

AProcess Deviation Log EOTA - Business Form Document Title: P-007, Internal Audit Process Document Number: Audit Action Item Log EOTA Employees Melissa Otero NA Referenced...

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


21

State-Of-The-Art in Permeability Determination From Well Log Data: Part 1-A Comparative Study, Model Development  

E-Print Network (OSTI)

- and the independent variables X ,...,X are well log variables. In their paper , Wendt1 p 4 and Sakurai established. Conference, Pittsburgh, PA, (November 1993). 12.Wendt, W.A., Sakurai, S., Nelson, P.H.: "Permeability Predic

Mohaghegh, Shahab

22

CEE: The Log Standard  

Science Conference Proceedings (OSTI)

... CEE & EMAP Automating an OODA Loop ? Observe Meaningful Logs, Reports, and News ? Orient Looking for Events of Possible Interest ...

2012-10-26T23:59:59.000Z

23

Logs / Meeting Minutes Index  

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

Logs / Meeting Minutes Logs / Meeting Minutes This page supplies links to the various logs and meeting minutes that are pertinent to the UES Group. FC Shift Log An ORACLE database tool used by the Floor Coordinators to record events that occur on the Experiment Hall Floor. FC Shift Log (Pubic View) Members of the APS Computer Network can use this link to view the FC Shift Log. MCR Shift Log An ORACLE database tool used by the MCR Operators to record events that occur relating to the operation of the Accelerating Systems. MCR Operator Message History The MCR Operator message for the past 72 hours are recorded for reference. UES Meeting Minutes The weekly User ESH Support group meeting minutes are recorded for reference. Also included are AOD-EOS and AOD-EFO meeting minutes. APS Radiation Safety PnP Committee Minutes

24

Process Deviation Log  

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

Process Deviation Log 09_0730 Process Deviation Log 09_0730 EOTA - Business Form Document Title: P-010, Process Deviation Process Document Number: Process Deviation Log EOTA Employees Melissa Otero N/A Referenced Documents: Parent Document: F-014 Rev. 11_0316 Approvers: Melissa Otero Document Owner: Elizabeth Sousa Backup Owner: Notify of Changes: A 09_0730 11_0316 Revision History: Rev. Description of Change Intitial Release. Revised log to reflect date/date range that PD is in effect. Removed drop-down menu items. Added ECD, Extension Date and Closed Column. F-014 Process Deviation Log 09_0730 Process Deviation # Date Requestor Departme nt Process # Has PD Occurred ? (Y/N) CAR/PAR # Distributio n Date Estimated Closure Date Extension Date Closed Date Comment PD-001 PD-002 PD-003 PD-004 PD-005 PD-006 PD-007 PD-008 PD-009

25

Building a 100K log/sec logging infrastructure  

Science Conference Proceedings (OSTI)

A look at the logging infrastructure that one division of Intuit built that included the requirement to handle 100K lines of logs per second with the logs being delivered to several destinations (including proprietary appliances) This paper will cover ...

David Lang

2012-12-01T23:59:59.000Z

26

openhole_logging.indd  

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

OPENHOLE LOGGING WELL OPENHOLE LOGGING WELL Objective R MOTC has drilled a mostly vertical well that is specifi cally designat- ed for openhole logging tests. It was drilled to 5,400 feet and has approximately 2,350 feet of open hole to test a variety of openhole logging tools. The wellbore is drilled with an 8-1/2" drill bit. The well was originally drilled with a 3% KCL Polymer mud system that seems to work well for stabilizing sensitive shale zones. The lower formations are very compact and should be able to stay open without signifi - cant caving. RMOTC has the capability to recondition this wellbore with a variety of mud types if needed. The openhole section will pass through a variety of ages, formations, and lithologies common to the Rocky Mountain geologic province. The rocks encoun-

27

Logging in to Franklin  

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

Logging in Logging in Logging in to Franklin Interactive Access You can log in to Franklin using SSH (Secure Shell) with the following command from any UNIX, Linux, FreeBSD, etc. command shell or terminal: % ssh -l username franklin.nersc.gov There are a number of SSH-capable clients available for Windows, Mac, and UNIX/Linux machines. NERSC does not support or recommend any particular client. Franklin has 10 login nodes; you will be randomly connected to one of those 10 when you ssh to franklin.nersc.gov. In all cases it will appear to you as if you are on "franklin.nersc.gov." The login nodes are where you compile codes, submit jobs, and view data. The login nodes on Franklin are directly connected to the internal high-speed "Seastar" network. Because of this you cannot login and work

28

Logging in to Hopper  

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

Logging in Logging in Logging in to Hopper Interactive Access You can log in to Hopper using SSH (Secure Shell) with the following command from any UNIX, Mac OS X, Linux, FreeBSD, etc. command shell or terminal: ssh -l username hopper.nersc.gov There are several SSH-capable clients available for Windows, Mac, and UNIX/Linux machines. NERSC does not support or recommend any particular client. Hopper has 12 login nodes. You will be randomly connected to one of those 12 when you ssh to hopper.nersc.gov. In all cases it will appear to you as if you are on "hopper.nersc.gov." The login nodes are where you compile codes, submit jobs, and view data. The login nodes on Hopper are "external," meaning they are not directly connected to Hopper's internal high-speed "Gemini" network. Because the

29

RMOTC - Testing - Openhole Logging Well  

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

Openhole Logging Well RMOTC Openhole Logging Well RMOTC has drilled a vertical well that is specifically designated for openhole logging tests. It was drilled to 5,450 feet and has...

30

Microsoft Word - scr-log  

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

Control Log Page : Log Date: System Name: Approval Status SCR Reqmnt Date Submitted Priority (E,U,R) * Change Approved Change Not Approved Hold (Future...

31

Chemical Logging | Open Energy Information  

Open Energy Info (EERE)

Chemical Logging Chemical Logging Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Chemical Logging Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Presence and geochemical composition of fluid producing zones Thermal: Calcium-alkalinity ratios versus depth assist in defining warm and hot water aquifers Dictionary.png Chemical Logging: Chemical logging produces a chemical profile of the formation fluid within a well based on the measurement of changes in the chemical composition of the drilling fluid during drilling operations.

32

Chukwa: a system for reliable large-scale log collection  

Science Conference Proceedings (OSTI)

Large Internet services companies like Google, Yahoo, and Facebook use the MapReduce programming model to process log data. MapReduce is designed to work on data stored in a distributed filesystem like Hadoop's HDFS. As a result, a number of log collection ... Keywords: logging, research, scale

Ariel Rabkin; Randy Katz

2010-11-01T23:59:59.000Z

33

Joint stochastic inversion of 3D pre-stack seismic data and well logs for high-resolution reservoir characterization and petrophysical modeling: application to deepwater hydrocarbon  

E-Print Network (OSTI)

Joint stochastic inversion of 3D pre-stack seismic data and well logs for high-resolution reservoir describes a novel algorithm for the joint stochastic inversion of well logs and multiple angle stacks, and M50, with M-40 being the reservoir with the highest hydrocarbon production. M-10 M-40 M-50 #12;Joint

Torres-Verdín, Carlos

34

Neutron Log | Open Energy Information  

Open Energy Info (EERE)

Neutron Log Neutron Log Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Neutron Log Details Activities (4) Areas (4) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: if used in conjunction with other logs, this technique can provide information on the rock type and the porosity Stratigraphic/Structural: Corelation of rock units Hydrological: Estimate of formation porosity Thermal: Dictionary.png Neutron Log: The neutron log responds primarily to the amount of hydrogen in the formation which is contained in oil, natural gas, and water. The amount of hydrogen can be used to identify zones of higher porosity.

35

Grid Logging: Best Practices Guide  

Science Conference Proceedings (OSTI)

The purpose of this document is to help developers of Grid middleware and application software generate log files that will be useful to Grid administrators, users, developers and Grid middleware itself. Currently, most of the currently generated log files are only useful to the author of the program. Good logging practices are instrumental to performance analysis, problem diagnosis, and security auditing tasks such as incident tracing and damage assessment. This document does not discuss the issue of a logging API. It is assumed that a standard log API such as syslog (C), log4j (Java), or logger (Python) is being used. Other custom logging API or even printf could be used. The key point is that the logs must contain the required information in the required format. At a high level of abstraction, the best practices for Grid logging are: (1) Consistently structured, typed, log events; (2) A standard high-resolution timestamp; (3) Use of logging levels and categories to separate logs by detail and purpose; (4) Consistent use of global and local identifiers; and (5) Use of some regular, newline-delimited ASCII text format. The rest of this document describes each of these recommendations in detail.

Tierney, Brian L; Tierney, Brian L; Gunter, Dan

2008-04-01T23:59:59.000Z

36

Selecting The Optimal Logging Suite For Geothermal Reservoir...  

Open Energy Info (EERE)

suggesting that pulsed neutron logs may not in many cases be needed, and density and electrical resistivity data were important to calibrate structural models based on surface...

37

Image Logs | Open Energy Information  

Open Energy Info (EERE)

Image Logs Image Logs Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Image Logs Details Activities (2) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: Identify different lithological layers, rock composition, grain size, mineral, and clay content Stratigraphic/Structural: -Fault and fracture identification -Rock texture, porosity, and stress analysis -determine dip, thickness, and geometry of rock strata in vicinity of borehole -Detection of permeable pathways, fracture zones, faults Hydrological: Locate zones of aquifer inflow/outflow Thermal:

38

Density Log | Open Energy Information  

Open Energy Info (EERE)

Density Log Density Log Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Density Log Details Activities (6) Areas (6) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: provides data on the bulk density of the rock surrounding the well Stratigraphic/Structural: Stratigraphic correlation between well bores. Hydrological: Porosity of the formations loggesd can be calculated for the Density log andprovide an indication potential aquifers. Thermal: Cost Information Low-End Estimate (USD): 0.4040 centUSD 4.0e-4 kUSD 4.0e-7 MUSD 4.0e-10 TUSD / foot Median Estimate (USD): 0.6868 centUSD

39

Gamma Log | Open Energy Information  

Open Energy Info (EERE)

Gamma Log Gamma Log Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Gamma Log Details Activities (6) Areas (6) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: provides information on changes in rock type near the wellbore from changes in measured gamma radiation Stratigraphic/Structural: using multiple gamma logs over an area, the depth to the sandstone and shale layers can be correlated over larger areas Hydrological: Thermal: Cost Information Low-End Estimate (USD): 0.2525 centUSD 2.5e-4 kUSD 2.5e-7 MUSD 2.5e-10 TUSD / foot Median Estimate (USD): 0.3838 centUSD

40

Time series analysis of a Web search engine transaction log  

Science Conference Proceedings (OSTI)

In this paper, we use time series analysis to evaluate predictive scenarios using search engine transactional logs. Our goal is to develop models for the analysis of searchers' behaviors over time and investigate if time series analysis is a valid method ... Keywords: ARIMA, Box-Jenkins model, Search engine, Time series analysis, Transactional log

Ying Zhang; Bernard J. Jansen; Amanda Spink

2009-03-01T23:59:59.000Z

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


41

Resistivity Log | Open Energy Information  

Open Energy Info (EERE)

Reservoir Evaluation- Results From The Alum 25-29 Well, Nevada Resistivity Log At Fish Lake Valley Area (DOE GTP) Fish Lake Valley Geothermal Area GTP ARRA Spreadsheet...

42

Geothermal well log interpretation midterm report  

DOE Green Energy (OSTI)

Reservoir types are defined according to fluid phase and temperature, lithology, geologic province, pore geometry, and salinity and fluid chemistry. Improvements are needed in lithology and porosity definition, fracture detection, and thermal evaluation for more accurate interpretation. Further efforts are directed toward improving diagnostic techniques for relating rock characteristics and log response, developing petrophysical models for geothermal systems, and developing thermal evaluation techniques. The Geothermal Well Log Interpretation study and report has concentrated only on hydrothermal geothermal reservoirs. Other geothermal reservoirs (hot dry rock, geopressured, etc.) are not considered.

Sanyal, S.K.; Wells, L.E.; Bickham, R.E.

1979-02-01T23:59:59.000Z

43

Acoustic paramagnetic logging tool  

DOE Patents (OSTI)

New methods and apparatus are disclosed which allow measurement of the presence of oil and water in geological formations using a new physical effect called the Acoustic Paramagnetic Logging Effect (APLE). The presence of petroleum in formation causes a slight increase in the earth's magnetic field in the vicinity of the reservoir. This is the phenomena of paramagnetism. Application of an acoustic source to a geological formation at the Larmor frequency of the nucleons present causes the paramagnetism of the formation to disappear. This results in a decrease in the earth3 s magnetic field in the vicinity of the oil bearing formation. Repetitively frequency sweeping the acoustic source through the Larmor frequency of the nucleons present (approx. 2 kHz) causes an amplitude modulation of the earth's magnetic field which is a consequence of the APLE. The amplitude modulation of the earth's magnetic field is measured with an induction coil gradiometer and provides a direct measure of the amount of oil and water in the excitation zone of the formation . The phase of the signal is used to infer the longitudinal relaxation times of the fluids present, which results in the ability in general to separate oil and water and to measure the viscosity of the oil present. Such measurements may be preformed in open boreholes and in cased well bores.

Vail, III, William B. (Bothell, WA)

1988-01-01T23:59:59.000Z

44

Oracle Log Buffer Queueing  

SciTech Connect

The purpose of this document is to investigate Oracle database log buffer queuing and its affect on the ability to load data using a specialized data loading system. Experiments were carried out on a Linux system using an Oracle 9.2 database. Previous experiments on a Sun 4800 running Solaris had shown that 100,000 entities per minute was an achievable rate. The question was then asked, can we do this on Linux, and where are the bottlenecks? A secondary question was also lurking, how can the loading be further scaled to handle even higher throughput requirements? Testing was conducted using a Dell PowerEdge 6650 server with four CPUs and a Dell PowerVault 220s RAID array with 14 36GB drives and 128 MB of cache. Oracle Enterprise Edition 9.2.0.4 was used for the database and Red Hat Linux Advanced Server 2.1 was used for the operating system. This document will detail the maximum observed throughputs using the same test suite that was used for the Sun tests. A detailed description of the testing performed along with an analysis of bottlenecks encountered will be made. Issues related to Oracle and Linux will also be detailed and some recommendations based on the findings.

Rivenes, A S

2004-12-08T23:59:59.000Z

45

Team-Based Message Logging: Preliminary Results  

Science Conference Proceedings (OSTI)

Fault tolerance will be a fundamental imperative in the next decade as machines containing hundreds of thousands of cores will be installed at various locations. In this context, the traditional checkpoint/restart model does not seem to be a suitable ... Keywords: High Performance Computing, Fault Tolerance, Message Logging

Esteban Meneses; Celso L. Mendes; Laxmikant V. Kal

2010-05-01T23:59:59.000Z

46

High temperature spectral gamma well logging  

Science Conference Proceedings (OSTI)

A high temperature spectral gamma tool has been designed and built for use in small-diameter geothermal exploration wells. Several engineering judgments are discussed regarding operating parameters, well model selection, and signal processing. An actual well log at elevated temperatures is given with spectral gamma reading showing repeatability.

Normann, R.A.; Henfling, J.A.

1997-01-01T23:59:59.000Z

47

Mud Logging | Open Energy Information  

Open Energy Info (EERE)

Mud Logging Mud Logging Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Mud Logging Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: Lithological layers are identified from drill cuttings Stratigraphic/Structural: Porosity of rocks Hydrological: Fluid content of the borehole while drilling can be determined Thermal: Cost Information Low-End Estimate (USD): 1,300.00130,000 centUSD 1.3 kUSD 0.0013 MUSD 1.3e-6 TUSD / day Median Estimate (USD): 1,450.00145,000 centUSD 1.45 kUSD 0.00145 MUSD 1.45e-6 TUSD / day High-End Estimate (USD): 2,000.00200,000 centUSD

48

Acoustic Logs | Open Energy Information  

Open Energy Info (EERE)

Acoustic Logs Acoustic Logs Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Acoustic Logs Details Activities (7) Areas (6) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: determine porosity of layers Stratigraphic/Structural: map discontinuities to determine their orientation. Hydrological: Thermal: Cost Information Low-End Estimate (USD): 1.00100 centUSD 1.0e-3 kUSD 1.0e-6 MUSD 1.0e-9 TUSD / foot Median Estimate (USD): 4.62462 centUSD 0.00462 kUSD 4.62e-6 MUSD 4.62e-9 TUSD / foot High-End Estimate (USD): 16.001,600 centUSD 0.016 kUSD 1.6e-5 MUSD 1.6e-8 TUSD / foot

49

FMI Log | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » FMI Log Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: FMI Log Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Image Logs Information Provided by Technique Lithology: Identify different lithological layers, rock composition, mineral, and clay content Stratigraphic/Structural: -Fault and fracture identification -Rock texture, porosity, and stress analysis -determine dip and structural features in vicinity of borehole -Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water

50

Geotech Logging Services | Open Energy Information  

Open Energy Info (EERE)

2013 DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for Geotech Logging Services Citation Geotech Logging Servces LLC. Geotech...

51

Improved geothermal well logging tools  

DOE Green Energy (OSTI)

A geothermal well logging tool has been designed to operate at 275/sup 0/C and 7000 psi. The logging tool will initially consist of a manometer, a gradiomanometer and a thermometer; the electrical and mechanical design is such that a flowmeter and a caliper can be added as a later development. A unique feature of the logging tool is that it contains no downhole active electronics. The manometer is a standard high temperature pressure gauge. The gradiomanometer consists of a differential pressure gauge which is coupled to ports separated vertically by 2 ft. The differential pressure gauge is a new development; it is designed to measure a differential pressure up to 2 psi at a line pressure of 10,000 psi. The thermometer is a platinum resistance thermometer previously developed for oil well logging. The pressure gauges are both strain gauge types which allows all three gauges are both strain gauge types which allows all three gauges to be connected in series and driven from a constant current supply. This arrangement makes it possible to use a standard seven-conductor cable with no downhole switching. The joints in the sonde are electron beam welded, thus eliminating any sealed joints in the sonde wall. The logging tool will be tested first in an autoclave and in a geothermal well later in the program.

Kratz, H.R.

1977-06-01T23:59:59.000Z

52

Caliper Log | Open Energy Information  

Open Energy Info (EERE)

Caliper Log Caliper Log Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Caliper Log Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Cost Information Low-End Estimate (USD): 0.4040 centUSD 4.0e-4 kUSD 4.0e-7 MUSD 4.0e-10 TUSD / foot Median Estimate (USD): 0.7878 centUSD 7.8e-4 kUSD 7.8e-7 MUSD 7.8e-10 TUSD / foot High-End Estimate (USD): 3.00300 centUSD 0.003 kUSD 3.0e-6 MUSD 3.0e-9 TUSD / foot Time Required Low-End Estimate: 0.35 days9.582478e-4 years 8.4 hours 0.05 weeks 0.0115 months / job

53

Definition: Image Logs | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Image Logs Jump to: navigation, search Dictionary.png Image Logs Well logging techniques which create images of the inside of a borehole. A 360° view camera is used that can be lowered into a borehole via logging cable. The camera's purpose is to provide live images of the borehole walls. View on Wikipedia Wikipedia Definition Well logging, also known as borehole logging is the practice of making a detailed record (a well log) of the geologic formations penetrated by a borehole. The log may be based either on visual inspection of samples brought to the surface (geological logs) or on physical measurements made by instruments lowered into the hole (geophysical logs). Well logging can

54

Well-logging activities in Russia  

Science Conference Proceedings (OSTI)

The report is a brief survey of the current state of well-logging service in Russia (number and types of crews, structure of well-logging jobs, types of techniques used, well-logging equipment, auxiliary downhole jobs, etc.). Types and peculiarities of well data acquisition and processing hardware and software are discussed (petrophysics included). New well-logging technologies used in Russia (new methods of electric logging data processing, electromagnetic logging, pulse neutron logging, nuclear magnetic resonance logging, acoustic tomography, logging-testing-logging technique, etc.) are surveyed. Comparison of the Tengiz field (Kazakhstan) well data obtained by Schlumberger and Neftegazgeofizika Association crews is given. Several problems and drawbacks in equipment and technology used by well-logging crews in Russia are discussed.

Savostyanov, N.A. (Neftegazgeofizika, Moscow (Russian Federation))

1993-09-01T23:59:59.000Z

55

Internet Data logging and Display  

E-Print Network (OSTI)

The current energy savings technology relies on conventional data logging systems, in which two major barriers exist. Formost is the fact that retrieving the energy data is not convenient, and the cost of the data logging equipment is high. The solution presented here is to accomplish these goals is to include a miniature web server in a remote-logging module, which we designed as part of our device. Thus allowing data to be accessed more frequently, via the Internet. As it currently stands, the state of California in the United States is experiencing power grid problems as residential and industrial energy demands increase. If an energy savings program is to be implemented, then an energy monitoring strategy must also devised. Our Internet appliance provides a solution, and this paper summarizes our implementation details and provides a computer screen-capture of the data being posted onto the Internet.

Sweeney, J., Jr.; Culp, C.; Haberl, J. S.

2001-01-01T23:59:59.000Z

56

Query clustering using user logs  

Science Conference Proceedings (OSTI)

Query clustering is a process used to discover frequently asked questions or most popular topics on a search engine. This process is crucial for search engines based on question-answering. Because of the short lengths of queries, approaches based on ... Keywords: Query clustering, search engine, user log, web data mining

2002-01-01T23:59:59.000Z

57

Definition: Density Log | Open Energy Information  

Open Energy Info (EERE)

Density Log Density Log Jump to: navigation, search Dictionary.png Density Log Density logging is a well logging tool that can provide a continuous record of a formation's bulk density along the length of a borehole. In geology, bulk density is a function of the density of the minerals forming a rock (i.e. matrix) and the fluid enclosed in the pore spaces.[1] View on Wikipedia Wikipedia Definition Density logging is a well logging tool that can provide a continuous record of a formation's bulk density along the length of a borehole. In geology, bulk density is a function of the density of the minerals forming a rock and the fluid enclosed in the pore spaces. This is one of three well logging tools that are commonly used to calculate porosity, the other two being sonic logging and neutron porosity logging

58

Definition: Resistivity Log | Open Energy Information  

Open Energy Info (EERE)

Resistivity Log Resistivity Log Jump to: navigation, search Dictionary.png Resistivity Log Electrical resistivity logging is the measurement of potential (voltage) differences resulting from electrical current flow in the vicinity of a borehole in order to determine formation resistivity.[1] View on Wikipedia Wikipedia Definition Resistivity logging is a method of well logging that works by characterizing the rock or sediment in a borehole by measuring its electrical resistivity. Resistivity is a fundamental material property which represents how strongly a material opposes the flow of electric current. In these logs, resistivity is measured using 4 electrical probes to eliminate the resistance of the contact leads. The log must run in holes containing electrically conductive mud or water. Resistivity logging is

59

Chemical logging of geothermal wells  

DOE Patents (OSTI)

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.

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

1981-01-01T23:59:59.000Z

60

Web Search/Browse Log Mining: Challenges, Methods, and Applications  

E-Print Network (OSTI)

propositional logic, in: Towards mathematical philosophy, Trends Log. Stud. Log. Libr. 28, Springer, Dordrecht

Pei, Jian

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


61

Well Log Techniques | Open Energy Information  

Open Energy Info (EERE)

Well Log Techniques Well Log Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Well Log Techniques Details Activities (4) Areas (4) Regions (1) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Downhole Techniques Information Provided by Technique Lithology: depth and thickness of formations; lithology and porosity can be inferred Stratigraphic/Structural: reservoir thickness, reservoir geometry, borehole geometry Hydrological: permeability and fluid composition can be inferred Thermal: direct temperature measurements; thermal conductivity and heat capacity Dictionary.png Well Log Techniques: Well logging is the measurement of formation properties versus depth in a

62

Category:Well Log Techniques | Open Energy Information  

Open Energy Info (EERE)

Category Category Edit History Facebook icon Twitter icon » Category:Well Log Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Well Log Techniques page? For detailed information on Well Log Techniques as exploration techniques, click here. Category:Well Log Techniques Add.png Add a new Well Log Techniques Technique Pages in category "Well Log Techniques" The following 17 pages are in this category, out of 17 total. A Acoustic Logs C Caliper Log Cement Bond Log Chemical Logging Cross-Dipole Acoustic Log D Density Log F FMI Log G Gamma Log I Image Logs M Mud Logging N Neutron Log P Pressure Temperature Log R Resistivity Log Resistivity Tomography S Single-Well and Cross-Well Resistivity Spontaneous Potential Well Log Stoneley Analysis

63

Energy Citations Database (ECD) - Alerts Log On  

Office of Scientific and Technical Information (OSTI)

ECD Alerts Log On You must Log On to use the ECD Alerts. Alerts provide users with e-mail notification of updates to the ECD in specific areas of interest. If you wish to receive...

64

Definition: Mud Logging | Open Energy Information  

Open Energy Info (EERE)

Mud Logging Mud Logging Jump to: navigation, search Dictionary.png Mud Logging Mud logs enable the geological description and analysis of rock cuttings suspended within the returned drilling mud and can provide a variety of useful information regarding reservoir parameters.[1] View on Wikipedia Wikipedia Definition Mud logging is the creation of a detailed record of a borehole by examining the cuttings of rock or brought to the surface by the circulating drilling medium (most commonly mud). Mud logging is usually performed by a third-party mud logging company. This provides well owners and producers with information about the lithology and fluid content of the borehole while drilling. Historically it is the earliest type of well log. Under some circumstances compressed air is employed as a circulating fluid,

65

High temperature electronics application in well logging  

DOE Green Energy (OSTI)

Some limitations, problems, and needs are briefly reviewed for neutron logging tools used in high-temperature geothermal environments. (ACR)

Traeger, R.K.; Lysne, P.C.

1987-01-01T23:59:59.000Z

66

Discovering Social Networks from Event Logs  

Science Conference Proceedings (OSTI)

Process mining techniques allow for the discovery of knowledge based on so-called "event logs", i.e., a log recording the execution of activities in some business process. Many information systems provide such logs, e.g., most WFM, ERP, CRM, SCM, and ... Keywords: Petri nets, business process management, data mining, process mining, social network analysis, workflow management

Wil M. P. Van Der Aalst; Hajo A. Reijers; Minseok Song

2005-12-01T23:59:59.000Z

67

Spontaneous Potential Well Log | Open Energy Information  

Open Energy Info (EERE)

Spontaneous Potential Well Log Spontaneous Potential Well Log Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Spontaneous Potential Well Log Details Activities (2) Areas (2) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: SP technique originally applied to locating sulfide ore-bodies. Stratigraphic/Structural: -Formation bed thickness and boundaries -Detection and tracing of faults -Permeability and porosity Hydrological: Determination of fluid flow patterns: electrochemical coupling processes due to variations in ionic concentrations, and electrokinetic coupling processes due to fluid flow in the subsurface.

68

Artificial neural network modeling and cluster analysis for organic facies and burial history estimation using well log data: A case study of the South Pars Gas Field, Persian Gulf, Iran  

Science Conference Proceedings (OSTI)

Intelligent and statistical techniques were used to extract the hidden organic facies from well log responses in the Giant South Pars Gas Field, Persian Gulf, Iran. Kazhdomi Formation of Mid-Cretaceous and Kangan-Dalan Formations of Permo-Triassic Data ... Keywords: Artificial neural network, Burial history, Cluster analysis, Organic facies, Rock-Eval pyrolysis, Well log data

Bahram Alizadeh; Saeid Najjari; Ali Kadkhodaie-Ilkhchi

2012-08-01T23:59:59.000Z

69

Leak checker data logging system  

DOE Patents (OSTI)

A portable, high speed, computer-based data logging system for field testing systems or components located some distance apart employs a plurality of spaced mass spectrometers and is particularly adapted for monitoring the vacuum integrity of a long string of a superconducting magnets such as used in high energy particle accelerators. The system provides precise tracking of a gas such as helium through the magnet string when the helium is released into the vacuum by monitoring the spaced mass spectrometers allowing for control, display and storage of various parameters involved with leak detection and localization. A system user can observe the flow of helium through the magnet string on a real-time basis hour the exact moment of opening of the helium input valve. Graph reading can be normalized to compensate for magnet sections that deplete vacuum faster than other sections between testing to permit repetitive testing of vacuum integrity in reduced time.

Payne, J.J.; Gannon, J.C.

1994-12-31T23:59:59.000Z

70

Leak checker data logging system  

DOE Patents (OSTI)

A portable, high speed, computer-based data logging system for field testing systems or components located some distance apart employs a plurality of spaced mass spectrometers and is particularly adapted for monitoring the vacuum integrity of a long string of a superconducting magnets such as used in high energy particle accelerators. The system provides precise tracking of a gas such as helium through the magnet string when the helium is released into the vacuum by monitoring the spaced mass spectrometers allowing for control, display and storage of various parameters involved with leak detection and localization. A system user can observe the flow of helium through the magnet string on a real-time basis hour the exact moment of opening of the helium input valve. Graph reading can be normalized to compensate for magnet sections that deplete vacuum faster than other sections between testing to permit repetitive testing of vacuum integrity in reduced time.

Gannon, Jeffrey C. (Arlington, TX); Payne, John J. (Waterman, IL)

1996-01-01T23:59:59.000Z

71

Leak checker data logging system  

DOE Patents (OSTI)

A portable, high speed, computer-based data logging system for field testing systems or components located some distance apart employs a plurality of spaced mass spectrometers and is particularly adapted for monitoring the vacuum integrity of a long string of a superconducting magnets such as used in high energy particle accelerators. The system provides precise tracking of a gas such as helium through the magnet string when the helium is released into the vacuum by monitoring the spaced mass spectrometers allowing for control, display and storage of various parameters involved with leak detection and localization. A system user can observe the flow of helium through the magnet string on a real-time basis hour the exact moment of opening of the helium input valve. Graph reading can be normalized to compensate for magnet sections that deplete vacuum faster than other sections between testing to permit repetitive testing of vacuum integrity in reduced time. 18 figs.

Gannon, J.C.; Payne, J.J.

1996-09-03T23:59:59.000Z

72

Definition: Gamma Log | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Gamma Log Jump to: navigation, search Dictionary.png Gamma Log Gamma logging is a method of measuring naturally occurring gamma radiation to characterize the rock or sediment in a borehole or drill hole. It is a wireline logging method used in mining, mineral exploration, water-well drilling, for formation evaluation in oil and gas well drilling and for other related purposes. Different types of rock emit different amounts and different spectra of natural gamma radiation.[1] View on Wikipedia Wikipedia Definition Gamma ray logging is a method of measuring naturally occurring gamma radiation to characterize the rock or sediment in a borehole or drill hole. It is a wireline logging method used in mining, mineral exploration,

73

Electric Micro Imager Log | Open Energy Information  

Open Energy Info (EERE)

Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Electric Micro Imager Log edit Details Activities (1) Areas (1) Regions (0) NEPA(0)...

74

Vertical Flowmeter Logging | Open Energy Information  

Open Energy Info (EERE)

2013 DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for Vertical Flowmeter Logging Citation U.S. Geological Survey. Vertical...

75

Borehole Geophysical Logging | Open Energy Information  

Open Energy Info (EERE)

2013 DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for Borehole Geophysical Logging Citation Hager-Richter Geoscience, Inc.....

76

Standard Slowness Log | Open Energy Information  

Open Energy Info (EERE)

Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Standard Slowness Log edit Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration...

77

Request Log Closedl Date Yes  

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

6 FOIA 6 FOIA - Request Log Closedl Date Yes 01 127106 Yes 02/23/06 Yes 04/05/06 Yes 04/03/06 Yes 04/03/06 Yes 05/22/06 Yes 35/30/06 - No. - 00 1 - 002 - 003 - 004 005 006 - 307 - Dated 01 125106 0211 6106 03/29/06 03/31 106 14/03/06 1511 8/06 )5/22/06 Date Rec'd 0 I I2 5/06 02/23/06 03130/06 0313 1 106 04/03/06 05/22/06 05/22/06 HQ or Dir. Direct Transfer from HQ Direct Trans from HQ Direct Direct Transfer 'rom HQ Subject Requesting a list of all your Procurement card holders Requesting copies of any and all Freedom of Information Act (FOIA) requests submitted to the Department of Energy (DOE) by Donna Wright, the Bradenton Herald, or any other individual that requested documentation or information pertaining to the Loral American Beryllium Corporation (also known as the

78

LOGJAM: a scalable unified log file archiver  

Science Conference Proceedings (OSTI)

Log files are a necessary record of events on any system. However, as systems scale, so does the volume of data captured. To complicate matters, this data can be distributed across all nodes within the system. This creates challenges in ways to obtain ... Keywords: archiving, log files, system management

Nicholas P. Cardo

2011-11-01T23:59:59.000Z

79

Definition: Chemical Logging | Open Energy Information  

Open Energy Info (EERE)

Logging Logging Jump to: navigation, search Dictionary.png Chemical Logging Chemical logging produces a chemical profile of the formation fluid within a well based on the measurement of changes in the chemical composition of the drilling fluid during drilling operations.[1] References ↑ http://www.osti.gov/bridge/servlets/purl/6076582-xtVTIk/6076582.pdf Ret Like Like You like this.Sign Up to see what your friends like. rieved from "http://en.openei.org/w/index.php?title=Definition:Chemical_Logging&oldid=600357" Category: Definitions What links here Related changes Special pages Printable version Permanent link Browse properties About us Disclaimers Energy blogs Linked Data Developer services OpenEI partners with a broad range of international organizations to grow

80

Definition: Cement Bond Log | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Cement Bond Log Jump to: navigation, search Dictionary.png Cement Bond Log A representation of the integrity of the cement job, especially whether the cement is adhering solidly to the outside of the casing. The log is typically obtained from one of a variety of sonic-type tools. The newer versions, called cement evaluation logs, along with their processing software, can give detailed, 360-degree representations of the integrity of the cement job, whereas older versions may display a single line representing the integrated integrity around the casing.[1] Related Terms Acoustic Logs References ↑ Schlumberger Oilfield Glossary Ret LikeLike UnlikeLike You like this.Sign Up to see what your friends like.

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


81

Shippers in Indonesia fight decree on illegal logging Shippers in Indonesia fight decree on illegal logging  

E-Print Network (OSTI)

Shippers in Indonesia fight decree on illegal logging Shippers in Indonesia fight decree on illegal Organization (ITTO), shippers in Indonesia are threatening to stop transporting logs if the government insists harvesting affects 700,000-850,000 hectares of forest per year in Indonesia, but widespread illegal logging

82

A Data Warehouse for Workflow Logs  

Science Conference Proceedings (OSTI)

Workflow Logs provide a very valuable source of information about the actual execution of business processes in organizations. We propose to use data warehouse technology to exploit this information resources for organizational developments, monitoring ...

Johann Eder; Georg E. Olivotto; Wolfgang Gruber

2002-09-01T23:59:59.000Z

83

Definition: Caliper Log | Open Energy Information  

Open Energy Info (EERE)

wells. The measurements that are recorded can be an important indicator of cave ins or shale swelling in the borehole, which can effect the results of other well logs.1 View on...

84

Logging-while-coring method and apparatus  

DOE Patents (OSTI)

A method and apparatus for downhole coring while receiving logging-while-drilling tool data. The apparatus includes core collar and a retrievable core barrel. The retrievable core barrel receives core from a borehole which is sent to the surface for analysis via wireline and latching tool The core collar includes logging-while-drilling tools for the simultaneous measurement of formation properties during the core excavation process. Examples of logging-while-drilling tools include nuclear sensors, resistivity sensors, gamma ray sensors, and bit resistivity sensors. The disclosed method allows for precise core-log depth calibration and core orientation within a single borehole, and without at pipe trip, providing both time saving and unique scientific advantages.

Goldberg, David S. (New York, NY); Myers, Gregory J. (Cornwall, NY)

2007-11-13T23:59:59.000Z

85

Definition: FMI Log | Open Energy Information  

Open Energy Info (EERE)

Dictionary.png FMI Log A downhole micro electrical resistivity technique first used for oil and gas wells in the late 1980's.1 References http:petphy.blogspot.com2011...

86

Definition: Neutron Log | Open Energy Information  

Open Energy Info (EERE)

log responds primarily to the amount of hydrogen in the formation which is contained in oil, natural gas, and water. The amount of hydrogen can be used to identify zones of...

87

Energy Citations Database (ECD) - Alerts Log On  

Office of Scientific and Technical Information (OSTI)

ECD Alerts Log On Alerts provide users with e-mail notification of updates to the ECD in specific areas of interest. If you wish to receive an Alert and are not registered, please...

88

Pressure Temperature Log | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Pressure Temperature Log Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Pressure Temperature Log Details Activities (13) Areas (13) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Perturbations in temperature or pressure can be indicative of faults or other structural features Hydrological: fluid cirulation, over-pressured zones, and under-pressured zones. Thermal: Temperature profile with depth Cost Information Low-End Estimate (USD): 0.6060 centUSD 6.0e-4 kUSD

89

Fluid-Rock Characterization and Interactions in NMR Well Logging  

SciTech Connect

The objective of this report is to characterize the fluid properties and fluid-rock interactions that are needed for formation evaluation by NMR well logging. The advances made in the understanding of NMR fluid properties are summarized in a chapter written for an AAPG book on NMR well logging. This includes live oils, viscous oils, natural gas mixtures, and the relation between relaxation time and diffusivity. Oil based drilling fluids can have an adverse effect on NMR well logging if it alters the wettability of the formation. The effect of various surfactants on wettability and surface relaxivity are evaluated for silica sand. The relation between the relaxation time and diffusivity distinguishes the response of brine, oil, and gas in a NMR well log. A new NMR pulse sequence in the presence of a field gradient and a new inversion technique enables the T{sub 2} and diffusivity distributions to be displayed as a two-dimensional map. The objectives of pore morphology and rock characterization are to identify vug connectivity by using X-ray CT scan, and to improve NMR permeability correlation. Improved estimation of permeability from NMR response is possible by using estimated tortuosity as a parameter to interpolate between two existing permeability models.

George J. Hirasaki; Kishore K. Mohanty

2005-09-05T23:59:59.000Z

90

Distributed Control System Log-Keeping Specification  

Science Conference Proceedings (OSTI)

Information generated within the distributed control system (DCS) at most fossil generating stations could be more fully used by converting relevant information into searchable operator logs. This can be done through automated techniques combined with operator oversight and review. As a result, operator log-keeping effectiveness can be greatly improved while reducing the burden on the operator.ObjectivesThis project was undertaken to create specifications for ...

2012-12-12T23:59:59.000Z

91

Universality for random matrices and log-gases  

E-Print Network (OSTI)

Eugene Wigner's revolutionary vision predicted that the energy levels of large complex quantum systems exhibit a universal behavior: the statistics of energy gaps depend only on the basic symmetry type of the model. Simplified models of Wigner's thesis have recently become mathematically accessible. For mean field models represented by large random matrices with independent entries, the celebrated Wigner-Dyson-Gaudin-Mehta (WDGM) conjecture asserts that the local eigenvalue statistics are universal. For invariant matrix models, the eigenvalue distributions are given by a log-gas with potential $V$ and inverse temperature $\\beta = 1, 2, 4$. corresponding to the orthogonal, unitary and symplectic ensembles. For $\\beta \

Laszlo Erdos

2012-12-04T23:59:59.000Z

92

D-dimensional log gravity  

SciTech Connect

We study Einstein gravity in dimensions D{>=}4 modified by curvature squared at critical point where the theory contains only massless gravitons. We show that at the critical point a new mode appears leading to a logarithmic gravity in the theory. The corresponding logarithmic solution may provide a gravity description of logarithmic conformal field theories (CFT) in higher dimensions. We note also that for special values of the parameters of the theory, the model admits solutions with nonrelativistic isometries.

Alishahiha, Mohsen; Fareghbal, Reza [School of physics, Institute for Research in Fundamental Sciences (IPM), P. O. Box 19395-5531, Tehran (Iran, Islamic Republic of)

2011-04-15T23:59:59.000Z

93

Borehole Logging Methods for Exploration and Evaluation of Uranium...  

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

You are here Home Borehole Logging Methods for Exploration and Evaluation of Uranium Deposits (1967) Borehole Logging Methods for Exploration and Evaluation of Uranium...

94

Well Logging Security Initiatives | Y-12 National Security Complex  

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

Well Logging Security ... Well Logging Security Initiatives The mp4 video format is not supported by this browser. Download video Captions: On Watch as GTRI demonstrates the threat...

95

Green Energy Resources Inc formerly New York International Log...  

Open Energy Info (EERE)

Inc formerly New York International Log Lumber Company Jump to: navigation, search Name Green Energy Resources Inc (formerly New York International Log & Lumber Company) Place...

96

Pressure Temperature Log At Maui Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

Pressure Temperature Log At Maui Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Pressure Temperature Log At Maui Area (DOE GTP)...

97

COMPARISON OF ACOUSTIC AND ELECTRICAL IMAGE LOGS FROM THE COSO...  

Open Energy Info (EERE)

fractures are difficult to identify in electrical image logs because of the low percentage of the borehole wall imaged. Analysis of induced structures in acoustic image logs...

98

Density Log at Alum Area (Moos & Ronne, 2010) | Open Energy Information  

Open Energy Info (EERE)

Moos & Ronne, 2010) Moos & Ronne, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Density Log at Alum Geothermal Area (Moos & Ronne, 2010) Exploration Activity Details Location Alum Geothermal Area Exploration Technique Density Log Activity Date Usefulness useful DOE-funding Unknown Notes Density, photo-electric factor (PEF), neutron, and gamma ray (GR) logs provided sufficient information to clearly delineate basement lithologic variations, suggesting that pulsed neutron logs may not in many cases be needed, and density and electrical resistivity data were important to calibrate structural models based on surface surveys. References Daniel Moos, Joel Ronne (2010) Selecting The Optimal Logging Suite For Geothermal Reservoir Evaluation- Results From The Alum 25-29 Well,

99

Resistivity Log At Long Valley Caldera Area (Sorey, Et Al., 1991) | Open  

Open Energy Info (EERE)

Resistivity Log At Long Valley Caldera Area (Sorey, Resistivity Log At Long Valley Caldera Area (Sorey, Et Al., 1991) Exploration Activity Details Location Long Valley Caldera Area Exploration Technique Resistivity Log Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Lithologic and resistivity logs from wells drilled into areas of less than 20 ohm-m resistivity show clay mineralization resulting from hydrothermal alteration within the volcanic fill (Nordquist, 1987). Low resistivity in the vicinity of well 44-16, identified in wellbore geophysical logs and two dimensional MT modeling is restricted to the thermal-fluid reservoirs in the early rhyolite and Bishop Tuff (Nordquist, 1987; Suemnicht, 1987). The MT data suggest that the resistivity structure near Mammoth Mountain is

100

Cement Bond Log | Open Energy Information  

Open Energy Info (EERE)

Cement Bond Log Cement Bond Log Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Cement Bond Log Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Acoustic Logs Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Cost Information Low-End Estimate (USD): 0.8585 centUSD 8.5e-4 kUSD 8.5e-7 MUSD 8.5e-10 TUSD / foot Median Estimate (USD): 1.25125 centUSD 0.00125 kUSD 1.25e-6 MUSD 1.25e-9 TUSD / foot High-End Estimate (USD): 3.00300 centUSD 0.003 kUSD 3.0e-6 MUSD 3.0e-9 TUSD / foot Time Required Low-End Estimate: 0.35 days9.582478e-4 years 8.4 hours 0.05 weeks 0.0115 months / job

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


101

Ceramic vacuum tubes for geothermal well logging  

DOE Green Energy (OSTI)

The results of investigations carried out into the availability and suitability of ceramic vacuum tubes for the development of logging tools for geothermal wells are summarized. Design data acquired in the evaluation of ceramic vacuum tubes for the development of a 500/sup 0/C instrumentation amplifier are presented. The general requirements for ceramic vacuum tubes for application to the development of high temperature well logs are discussed. Commercially available tubes are described and future contract activities that specifically relate to ceramic vacuum tubes are detailed. Supplemental data is presented in the appendix. (MHR)

Kelly, R.D.

1977-01-12T23:59:59.000Z

102

Learning about the world through long-term query logs  

Science Conference Proceedings (OSTI)

In this article, we demonstrate the value of long-term query logs. Most work on query logs to date considers only short-term (within-session) query information. In contrast, we show that long-term query logs can be used to learn about the world we live ... Keywords: data mining, knowledge discovery, query logs, user behavior

Matthew Richardson

2008-10-01T23:59:59.000Z

103

Adding value to log event correlation using distributed techniques  

Science Conference Proceedings (OSTI)

Log management and monitoring activities have traditionally proved very useful in detecting system and network faults. Increasingly, log monitoring has also been recognized for its value in detecting and thwarting malicious behavior on systems and the ... Keywords: common event expression, event correlation, insider threat, insider threat detection, log management, web server logs

Justin Myers; Michael R. Grimaila; Robert F. Mills

2010-04-01T23:59:59.000Z

104

Stratified analysis of AOL query log  

Science Conference Proceedings (OSTI)

Characterizing user's intent and behaviour while using a retrieval information tool (e.g. a search engine) is a key question on web research, as it hold the keys to know how the users interact, what they are expecting and how we can provide them information ... Keywords: Query log analysis, User behaviour, User intent, User interactions, User profiling

David J. Brenes; Daniel Gayo-Avello

2009-05-01T23:59:59.000Z

105

Improving Software Diagnosability via Log Enhancement  

Science Conference Proceedings (OSTI)

Diagnosing software failures in the field is notoriously difficult, in part due to the fundamental complexity of troubleshooting any complex software system, but further exacerbated by the paucity of information that is typically available in ... Keywords: Log, debugging, failure diagnostics, program analysis, software diagnosability

Ding Yuan; Jing Zheng; Soyeon Park; Yuanyuan Zhou; Stefan Savage

2012-02-01T23:59:59.000Z

106

Indonesia to fight illegal logging Kurniawan Hari  

E-Print Network (OSTI)

Indonesia to fight illegal logging Kurniawan Hari The government should set up a task force to deal another $8.1 billion. "Indonesia's economy will collapse if these evil practices are not stopped," Ermaya in the current fiscal year and was three times Indonesia's foreign debt budget. Commission members said the sand

107

Gamma-Ray Logging Workshop (February 1981)  

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

Borehole logging methods for exploration Borehole logging methods for exploration and evaluation o f uranium deposits . Philip H. O d d , Robert F. Bmullad and Carl P. Lathan rej~rinkttl fnlm Mining and Groundwater Geophysiall967 Borehole logging methods for exploration and evaluation of uranium deposits Philip H. Dodd, Robert F. Droullard and Carl P. Lathan US. Atomic Energy Commhwn GmrPd Jtinct&n, Colorado Abstract, M o l e 1 - i s thc geophysical methad mast exten&@ w r t i n the Udtrrd States for exploratio~ md edwtim of wanhi &pod&. dammow lop, C o r n r n d j suppkrnentd with a singbz-pobt msfstailee log, m t l y supply about 80 percent of the bask data for om regerve c W t i o R a d mu& of the w ~ k r 6 . p ~ &ngk inf~nnatio~ Tmck-mounted 'rotmy eqnipmcnt i s EMhmody emphy&& holes usually hwre a nominai b

108

Security Event and Log Management Service  

E-Print Network (OSTI)

Security Event and Log Management Service: Comprehensive, Cost-effective Approach to Enhance Network Security and Security Data Management IBM Global Technology Services December 2007 #12;Executive Summary The economics of network security have changed. The high cost and complexity inherent in the use

109

Coal log pipeline research at the University of Missouri. 4th Quarterly report, October 1, 1993--December 31, 1993  

SciTech Connect

This paper is a progress report on a research project aimed at the development of coal log technology. Efforts have been directed at the development of technology for the fabrication of stable coal logs, as well as the energy efficient transport of these logs, in particular by pipelines. Work has been directed at new types of binders, new fabrication presses, the application of polymers to reduce transport losses, and modeling efforts.

Liu, H.

1994-05-01T23:59:59.000Z

110

Energy Efficiency in Log Homes | Department of Energy  

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

Energy Efficiency in Log Homes Energy Efficiency in Log Homes Energy Efficiency in Log Homes April 13, 2012 - 11:29am Addthis Consider energy efficiency when designing or purchasing a log home. | Photo courtesy of ©iStockphoto.com/tinabelle Consider energy efficiency when designing or purchasing a log home. | Photo courtesy of ©iStockphoto.com/tinabelle What does this mean for me? Before designing or purchasing a log home, you should consider several factors related to energy efficiency. Log homes may be site-built or pre-cut in a factory for delivery to the site. Some log home manufacturers can also customize their designs. Before designing or purchasing a manufactured log home, you should consider several factors related to energy efficiency. The R-Value of Wood A material's thermal resistance or resistance to heat flow is measured by

111

Energy Efficiency in Log Homes | Department of Energy  

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

Energy Efficiency in Log Homes Energy Efficiency in Log Homes Energy Efficiency in Log Homes April 13, 2012 - 11:29am Addthis Consider energy efficiency when designing or purchasing a log home. | Photo courtesy of ©iStockphoto.com/tinabelle Consider energy efficiency when designing or purchasing a log home. | Photo courtesy of ©iStockphoto.com/tinabelle What does this mean for me? Before designing or purchasing a log home, you should consider several factors related to energy efficiency. Log homes may be site-built or pre-cut in a factory for delivery to the site. Some log home manufacturers can also customize their designs. Before designing or purchasing a manufactured log home, you should consider several factors related to energy efficiency. The R-Value of Wood A material's thermal resistance or resistance to heat flow is measured by

112

Microsoft Word - FOIA Log FY 2003.doc  

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

3 FOIA - Request Log 3 FOIA - Request Log 1 Closed/ Date No. Dated Date Rec'd HQ or Dir. Subject Yes/ 11/03/03 001 12/16/02 1/7/03 Transfer from HQ Documentation provided identifying all Waste Isolation Pilot Plant contractors and their sub- contractors, as well as the principals for those entities. Yes 2/20/04 002 12/16/02 1/7/03 Transfer from HQ Documentation provided concerning the following Waste Isolation Pilot Plant related items: 1) Notify as to whether any portion of Westinghouse TRU Solutions work has been outsourced or privatized, and identify the outsource contact affected employees, 2) Notify as to whether environmental work done by Westinghouse TRU Solutions has undergone any changes involving position within company structure, management personnel, addition or deletions to scope of

113

Microsoft Word - FOIA Log FY 2001.doc  

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

1 FOIA - Request Log 1 FOIA - Request Log 1 Closed/ Date No. Dated Date Rec'd HQ or Dir. Subject Yes/ 3/29/01 001 02/01/01 02/01/01 01-0021C Transfer AL Copies of all documents including studies and memoranda, which may identify or consider WIPP site in Carlsbad, NM as a potential site for storage or disposal of spent reactor fuel or high-level radioactive wastes 2. All documents including studies, memoranda, hypothesizing, considering, recommending, or suggesting the WIPP site in NM as an alternative site to the Yucca Mountain site in NV. 3. All documents or lists setting forth the alternative sites that may potential be considered by DOE if the Yucca Mountain site is for any reason not selected to be the DOE site receiving high level radioactive waste or spent reactor fuel. If alternative potential sites have

114

Microsoft Word - FOIA Log FY 2002.doc  

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

FOIA - Request Log FOIA - Request Log 1 Closed/ Date No. Dated Date Rec'd HQ or Dir. Subject Yes/ 1/30/02 001 12/3/02 12/21/02 Richland Transfer Richland Operation Office search for records they located documents originated by the DOE Carlsbad Field Office that may be responsive to Mr. Hongs request. By transfer of this letter they forwarded Mr. Hong request, along with the documents located at Richland to the Carlsbad FOIA Office. CBFO will respond directly to Mr. Hong with a release determination Yes/ 2/13/02 002 1/30/02 1/30/02 Direct Description of request: answers to 1) What is the makeup of the additional 2 MT now bound for WIPP? What sites will come from, in what quantities, and in what form? 2) What type of NEPA documentation will DOE conduct on this additional 2 MT? (Note: Disposal of this material

115

INSPIRE and SPIRES Log File Analysis  

Science Conference Proceedings (OSTI)

SPIRES, an aging high-energy physics publication data base, is in the process of being replaced by INSPIRE. In order to ease the transition from SPIRES to INSPIRE it is important to understand user behavior and the drivers for adoption. The goal of this project was to address some questions in regards to the presumed two-thirds of the users still using SPIRES. These questions are answered through analysis of the log files from both websites. A series of scripts were developed to collect and interpret the data contained in the log files. The common search patterns and usage comparisons are made between INSPIRE and SPIRES, and a method for detecting user frustration is presented. The analysis reveals a more even split than originally thought as well as the expected trend of user transition to INSPIRE.

Adams, Cole; /Wheaton Coll. /SLAC

2012-08-31T23:59:59.000Z

116

Ceramic vacuum tubes for geothermal well logging  

DOE Green Energy (OSTI)

Useful design data acquired in the evaluation of ceramic vacuum tubes for the development of a 500/sup 0/C instrumentation amplifier are presented. The general requirements for ceramic vacuum tubes are discussed for application to the development of high temperature well logs. Commercially available tubes are described and future contract activities that specifically relate to ceramic vacuum tubes are detailed. Supplemental data are presented in the appendix.

Kelly, R.D.

1977-01-01T23:59:59.000Z

117

Chiral gravity, log gravity, and extremal CFT  

Science Conference Proceedings (OSTI)

We show that the linearization of all exact solutions of classical chiral gravity around the AdS{sub 3} vacuum have positive energy. Nonchiral and negative-energy solutions of the linearized equations are infrared divergent at second order, and so are removed from the spectrum. In other words, chirality is confined and the equations of motion have linearization instabilities. We prove that the only stationary, axially symmetric solutions of chiral gravity are BTZ black holes, which have positive energy. It is further shown that classical log gravity--the theory with logarithmically relaxed boundary conditions--has finite asymptotic symmetry generators but is not chiral and hence may be dual at the quantum level to a logarithmic conformal field theories (CFT). Moreover we show that log gravity contains chiral gravity within it as a decoupled charge superselection sector. We formally evaluate the Euclidean sum over geometries of chiral gravity and show that it gives precisely the holomorphic extremal CFT partition function. The modular invariance and integrality of the expansion coefficients of this partition function are consistent with the existence of an exact quantum theory of chiral gravity. We argue that the problem of quantizing chiral gravity is the holographic dual of the problem of constructing an extremal CFT, while quantizing log gravity is dual to the problem of constructing a logarithmic extremal CFT.

Maloney, Alexander [Physics Department, McGill University, Montreal, QC H3A 2T8 (Canada); Song Wei [Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190 (China); Center for the Fundamental Laws of Nature Jefferson Physical Laboratory, Harvard University, Cambridge, Massachusetts 02138 (United States); Strominger, Andrew [Center for the Fundamental Laws of Nature Jefferson Physical Laboratory, Harvard University, Cambridge, Massachusetts 02138 (United States)

2010-03-15T23:59:59.000Z

118

Chiral Gravity, Log Gravity and Extremal CFT  

E-Print Network (OSTI)

We show that the linearization of all exact solutions of classical chiral gravity around the AdS3 vacuum have positive energy. Non-chiral and negative-energy solutions of the linearized equations are infrared divergent at second order, and so are removed from the spectrum. In other words, chirality is confined and the equations of motion have linearization instabilities. We prove that the only stationary, axially symmetric solutions of chiral gravity are BTZ black holes, which have positive energy. It is further shown that classical log gravity-- the theory with logarithmically relaxed boundary conditions --has finite asymptotic symmetry generators but is not chiral and hence may be dual at the quantum level to a logarithmic CFT. Moreover we show that log gravity contains chiral gravity within it as a decoupled charge superselection sector. We normally evaluate the Euclidean sum over geometries of chiral gravity and show that it gives precisely the holomorphic extremal CFT partition function. The modular invariance and integrality of the expansion coefficients of this partition function are consistent with the existence of an exact quantum theory of chiral gravity. We argue that the problem of quantizing chiral gravity is the holographic dual of the problem of constructing an extremal CFT, while quantizing log gravity is dual to the problem of constructing a logarithmic extremal CFT.

Alexander Maloney; Wei Song; Andrew Strominger

2009-03-26T23:59:59.000Z

119

Precision pressure/temperature logging tool  

DOE Green Energy (OSTI)

Past memory logging tools have provided excellent pressure/temperature data when used in a geothermal environment, and they are easier to maintain and deploy than tools requiring an electric wireline connection to the surface. However, they are deficient since the tool operator is unaware of downhole conditions that could require changes in the logging program. Tools that make ``decisions`` based on preprogrammed scenarios can partially overcome this difficulty, and a suite of such memory tools has been developed at Sandia National Laboratories. The first tool, which forms the basis for future instruments, measures pressure and temperature. Design considerations include a minimization of cost while insuring quality data, size compatibility with diamond-cored holes, operation in holes to 425 C (800 F), transportability by ordinary passenger air service, and ease of operation. This report documents the development and construction of the pressure/temperature tool. It includes: (1) description of the major components; (2) calibration; (3) typical logging scenario; (4) tool data examples; and (5) conclusions. The mechanical and electrical drawings, along with the tool`s software, will be furnished upon request.

Henfling, J.A.; Normann, R.A.

1998-01-01T23:59:59.000Z

120

Simulating the Upper Barren Zone and the Ore Zone tests performed with the EMC logging tool  

SciTech Connect

The primary purpose of the Multispectral Nuclear Logging project is to assess the effectiveness of applying nuclear borehole-logging techniques to the Department of Energy`s (DOE) Environmental Restoration (ER) program, adapt the technology to improve these capabilities, and transfer that technology to industry. The purpose of the Monte Carlo simulations using MCNP is to predict the minimum concentration levels for environmental contaminants that could be detected by Multispectral Logging (MSL). The Monte Carlo code used for this type of simulation, MCNP, should be benchmarked against experimental data to show that the user can accurately reproduce the proper gamma-ray spectrum. Experimental data was obtained from Westinghouse-Hanford Company using the Environmental Measurements Corp. (EMC) logging tool in the Upper Barren Zone (UBZ) and Ore Zone (OZ) calibration models at Grand Junction. This paper continues the discussion of benchmarking MCNP using the UBZ and OZ data.

Frankle, S.C.

1994-09-01T23:59:59.000Z

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


121

Acoustic Waveform Logging - Advances In Theory And Application  

E-Print Network (OSTI)

Full-waveform acoustic logging has made significant advances in both theory and application in recent years, and these advances have greatly increased the capability of log analysts to measure the physical properties of ...

Cheng, C. H.

122

Traveling Salesman Problem Formulations with N log N Number of ...  

E-Print Network (OSTI)

time reducing the number of binary variables to O(N log2 N). The expense is the increase in the constraint set cardinality measuring at O(N2 log2 N), and in the...

123

Change Log for the e-Handbook of Statistical Methods  

Science Conference Proceedings (OSTI)

Change Log for the Handbook. Introduction, This page documents changes made to the online version of the Handbook. ...

2013-11-27T23:59:59.000Z

124

EOR: well logs sharpen focus on residual saturation. Part 2  

Science Conference Proceedings (OSTI)

Much of what the enhanced recovery specialist must know about the reservoir under consideration can be measured, calculated, or deduced from well logging data. Appropriate well logging procedures for this type of formation evaluation would include resistivity, radioactivity, dielectric constant, and acoustic well logs. This work describes the principles and procedures for assessing residual oil saturation of a subsurface formation using these methods. The study explains what is actually being measured and compared when well logging data are obtained and processed.

Frederick, R.O.

1983-01-01T23:59:59.000Z

125

Geothermal well log interpretation. Progress report  

DOE Green Energy (OSTI)

Progress is presented on the following tasks: review of the state-of-the-art, classification of geothermal reservoir types, data acquisition, problem definition and directions for solution, and refinement of existing interpretation techniques and development of new ones. Computerized literature searches were conducted. The classification system defines five major characteristics which will qualify a potential reservoir. A catalog lists well logs currently available for study. Rock and fluid parameters needed for reservoir studies are listed. A list of matrix characteristics for rocks and minerals is given. (MHR)

Not Available

1978-01-01T23:59:59.000Z

126

Microsoft Word - FOIA Log FY 2005.doc  

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

5 FOIA - Request Log 5 FOIA - Request Log 1 Closed/ Date No. Dated Date Rec'd HQ or Dir. Subject Yes 02/23/05 001 02/16/05 02/16/05 Direct Copies of the 2004 Modifications to the Westinghouse TRU Solutions contract (No. DE-AC- 04-01AL66444) for the management and operation of the Waste Isolation Pilot Plant. Yes 04/12/05 002 04/11/05 04/11/05 Direct Copies of the scope of work statement for the EE&G Oversight contract for the Waste Isolation Pilot Plant, dated 1999 or 2000 Yes 04/29/05 003 04/20/05 04/20/05 Direct (1) A copy of the Winning Proposal for RFP No. DE-AC04-89AL58309 (A036), entitled Environmental Evaluation Group (EEG) Oversight Contract for the Waste Isolation Pilot Plant. Subject RFO was issued in FY 2001, and we believe the initials contract was awarded to a company named EG&G.

127

Dual excitation acoustic paramagnetic logging tool  

DOE Patents (OSTI)

New methods and apparatus are disclosed which allow measurement of the presence of oil and water in geological formations using a new physical effect called the Acoustic Paramagnetic Logging Effect (APLE). The presence of petroleum in formation causes a slight increase in the earth's magnetic field in the vicinity of the reservoir. This is the phenomena of paramagnetism. Application of an acoustic source to a geological formation at the Larmor frequency of the nucleons present causes the paramagnetism of the formation to disappear. This results in a decrease in the earth's magnetic field in the vicinity of the oil bearing formation. Repetitively frequency sweeping the acoustic source through the Larmor frequency of the nucleons present (approx. 2 kHz) causes an amplitude modulation of the earth's magnetic field which is a consequence of the APLE. The amplitude modulation of the earth's magnetic field is measured with an induction coil gradiometer and provides a direct measure of the amount of oil and water in the excitation zone of the formation. The phase of the signal is used to infer the longitudinal relaxation times of the fluids present, which results in the ability in general to separate oil and water and to measure the viscosity of the oil present. Such measurements may be performed in open boreholes and in cased well bores. The Dual Excitation Acoustic Paramagnetic Logging Tool employing two acoustic sources is also described. 6 figs.

Vail, W.B. III.

1989-02-14T23:59:59.000Z

128

Dual excitation acoustic paramagnetic logging tool  

DOE Patents (OSTI)

New methods and apparatus are disclosed which allow measurement of the presence of oil and water in gelogical formations using a new physical effect called the Acoustic Paramagnetic Logging Effect (APLE). The presence of petroleum in formation causes a slight increase in the earth's magnetic field in the vicinity of the reservoir. This is the phenomena of paramagnetism. Application of an acoustic source to a geological formation at the Larmor frequency of the nucleous present causes the paramagnetism of the formation to disappear. This results in a decrease in the earth's magnetic field in the vicinity of the oil bearing formation. Repetitively frequency sweeping the acoustic source through the Larmor frequency of the nucleons present (approx. 2 kHz) causes an amplitude modulation of the earth's magnetic field which is a consequence of the APLE. The amplitude modulation of the earth's magnetic field is measured with an induction coil gradiometer and provides a direct measure of the amount of oil and water in the excitation zone of the formation. The phase of the signal is used to infer the longitudinal relaxation times of the fluids present, which results in the ability in general to separate oil and water and to measure the viscosity of the oil present. Such measurements may be preformed in open boreholes and in cased well bores. The Dual Excitation Acoustic Paramagnetic Logging Tool employing two acoustic sources is also described.

Vail, III, William B. (Bothell, WA)

1989-01-01T23:59:59.000Z

129

Microsoft Word - FOIA Log FY 2007.doc  

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

7 FOIA - Request Log 7 FOIA - Request Log 1 Closed/ Date No. Dated Date Rec'd HQ or Dir. Subject Finalized 02/08/07 001 10/05/06 01/08/07 Transfer from DOE- EM-CBC Copies of contract modifications, performance evaluations, task orders and task order proposals related to contract AT30-05EW03000 with Navarro Research and Engineering, Inc. Finalized 01/31/07 002 01/11/07 01/11/07 Direct For a copy of contract DE-AC04-95AL89446 for the period of September 1995 through the end of the contract. Also, if not included in the above, a copy of the special provisions for the contract specifying the role of the CTAC Program Manager as the single point of contact with DOE. Finalized 02/06/07 003 01/31/07 02/05/07 Transfer from DOE/HQ Copies of the U.S. Department of Energy's ten oldest open or pending Freedom of

130

Geothermal Logging Instrumentation Development Program Plan (U)  

DOE Green Energy (OSTI)

This Geothermal Logging Instrumentation Development Program Plan outlines a nine-year, industry-based program to develop and apply high temperature instrumentation technology which is needed by the borehole logging industry to serve the rapidly expanding geothermal market. Specifically, this program will upgrade existing materials and sondes to improve their high-temperature reliability. To achieve this goal specialized equipment such as high temperature electronics, cables and devices for measuring formation temperature, flow rate, downhole pressure, and fractures will be developed. In order to satisfy critical existing needs, the near-term (FY80) goal is for operation at or above 275/sup 0/C in pressures up to 48.3 MPa (7,000 psi). The long-term (FY84) goal is for operation up to 350/sup 0/C and 138 MPa (20,000 psi). This program plan has been prepared for the Department of Energy's Division of Geothermal Energy (DGE) and is a portion of the DGE long-range Geothermal Well Technology Program.

Veneruso, A.F.; Polito, J.; Heckman, R.C.

1978-08-01T23:59:59.000Z

131

Dewarless Logging Tool - 1st Generation  

DOE Green Energy (OSTI)

This report focuses on Sandia National Laboratories' effort to create high-temperature logging tools for geothermal applications without the need for heat shielding. One of the mechanisms for failure in conventional downhole tools is temperature. They can only survive a limited number of hours in high temperature environments. For the first time since the evolution of integrated circuits, components are now commercially available that are qualified to 225 C with many continuing to work up to 300 C. These components are primarily based on Silicon-On-Insulator (SOI) technology. Sandia has developed and tested a simple data logger based on this technology that operates up to 300 C with a few limiting components operating to only 250 C without thermal protection. An actual well log to 240 C without shielding is discussed. The first prototype high-temperature tool measures pressure and temperature using a wire-line for power and communication. The tool is based around the HT83C51 microcontroller. A brief discussion of the background and status of the High Temperature Instrumentation program at Sandia, objectives, data logger development, and future project plans are given.

HENFLING,JOSEPH A.; NORMANN,RANDY A.

2000-08-01T23:59:59.000Z

132

Min-cuts and Shortest Cycles in Planar Graphs in O(n log log n) Time  

E-Print Network (OSTI)

We present a deterministic O(n log log n) time algorithm for finding shortest cycles and minimum cuts in planar graphs. The algorithm improves the previously known fastest algorithm by Italiano et al. in STOC'11 by a factor of log n. This speedup is obtained through the use of dense distance graphs combined with a divide-and-conquer approach.

\\L\\kacki, Jakub

2011-01-01T23:59:59.000Z

133

The Borneo Project : Indonesia Fails to Stop Illegal Logging, Report Says Indonesia Fails to Stop Illegal Logging, Report Says  

E-Print Network (OSTI)

The Borneo Project : Indonesia Fails to Stop Illegal Logging, Report Says Indonesia Fails to Stop Illegal Logging, Report Says by Irwan Firdaus, The Associated Press January 15th, 2003 JAKARTA, Indonesia -- Corruption in Indonesia's police and military has contributed to a surge in illegal logging that has

134

Formation Micro-Imager Logs (FMI) | Open Energy Information  

Open Energy Info (EERE)

Formation Micro-Imager Logs (FMI) Formation Micro-Imager Logs (FMI) Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Formation Micro-Imager Logs (FMI) Author Shakeel Ahmed Published Publisher Not Provided, 2013 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Formation Micro-Imager Logs (FMI) Citation Shakeel Ahmed. Formation Micro-Imager Logs (FMI) [Internet]. 2013. [cited 2013/10/09]. Available from: http://petphy.blogspot.com/2011/12/formation-micro-imager-logs-fmi.html Retrieved from "http://en.openei.org/w/index.php?title=Formation_Micro-Imager_Logs_(FMI)&oldid=687994" Categories: References Geothermal References Uncited References What links here Related changes Special pages Printable version Permanent link Browse properties

135

Chemical Logging At Raft River Geothermal Area (1979) | Open Energy  

Open Energy Info (EERE)

Logging At Raft River Geothermal Area (1979) Logging At Raft River Geothermal Area (1979) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Chemical Logging At Raft River Geothermal Area (1979) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Chemical Logging Activity Date 1979 Usefulness useful DOE-funding Unknown Exploration Basis To use new methods to assist geothermal well drilling. Notes Chemical logging resulted in the development of a technique to assist in geothermal well drilling and resource development. Calcium-alkalinity ratios plotted versus drill depth assisted in defining warm and hot water aquifers. Correlations between the calcium-alkalinity log and lithologic logs were used to determine aquifer types and detection of hot water zones

136

Cross-Dipole Acoustic Log | Open Energy Information  

Open Energy Info (EERE)

Cross-Dipole Acoustic Log Cross-Dipole Acoustic Log Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Cross-Dipole Acoustic Log Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Acoustic Logs Information Provided by Technique Lithology: Stratigraphic/Structural: Rock stress and fracture analysis Hydrological: Use for fracture identification in open and cased holes. Also used for evaluating hydro fracturing/well stimulation effectiveness. Thermal: Dictionary.png Cross-Dipole Acoustic Log: An acoustic logging technique where the acoustic transmitter and receivers are lowered down hole and waveforms that travel through the well mud,

137

Gamma Log At Coso Geothermal Area (1977) | Open Energy Information  

Open Energy Info (EERE)

Gamma Log At Coso Geothermal Area (1977) Gamma Log At Coso Geothermal Area (1977) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Gamma Log At Coso Geothermal Area (1977) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Gamma Log Activity Date 1977 Usefulness not indicated DOE-funding Unknown Notes extensive geophysical logging surveys were conducted: natural gamma and neutron porosity logs indicate gross rock type References Galbraith, R. M. (1 May 1978) Geological and geophysical analysis of Coso Geothermal Exploration Hole No. 1 (CGEH-1), Coso Hot Springs KGRA, California Goranson, C.; Schroeder, R. (1 June 1978) Static downhole characteristics of well CGEH-1 at Coso Hot Springs, China Lake, California Retrieved from "http://en.openei.org/w/index.php?title=Gamma_Log_At_Coso_Geothermal_Area_(1977)&oldid=510780"

138

Coal log pipeline research at University of Missouri. Second quarterly technical progress report, 1 April--30 June 1996  

SciTech Connect

During this quarter, significant progress has been made in the following, fronts of coal log pipeline research, development and technology transfer: 1. Design of the special 300-ton coal log compaction machine was completed, Furthermore, much progress has been made in the design of the system needed to feed coal into the coal log compaction machine, and the design of the system to remove logs automatically as soon as they are compacted. 2. Coal mixtures containing different amounts of moisture were compacted into 1.91- inch-diameter coal logs rapidly (in 6 seconds). It was found that for the Mettiki coal tested, the optimum moisture is around 8%. Under the test conditions (room temperature and 3% binders), the rapidly compacted coal logs with 8% moisture had less than 4% weight loss in 350 cycles of circulation. 3. Completed evaluation of the effectiveness of using wall lubricants to enhance coal log quality. Both calcium sterarate and MoS{sub 2} were found to be effective. 4. It was found that when the interior of a mold is not cleaned after coal log has been compacted, the coal mixture film clinging to the wall hardens in time and form a hard crust which affects the quality of the next log to be produced. But, if the second log is produced immediately after the first, no hard crust is formed and the quality of the second log, is not affected. 5. Coal logs made with the coal crushed by the Gundlach Company were found to be better than coal logs made with the coal crushed by the CPRC`s hammer mill. 7. A 320-ft-long, 6-inch-diameter coal log pipeline test facility was constructed in Rolla during this period. 8. Completed the simulation of an 8-inch-diameter, 20-mile-long coal log pipeline recirculating loop driven by a pump bypass. 9. Continued improvement was accomplished in the hydraulic model of HCP and CLP to predict pressure drop and capsule velocity for both single capsules and capsule train. Also, work has started to extend the analysis to sloped pipelines.

Liu, H.

1996-06-01T23:59:59.000Z

139

Armored instrumentation cable for geothermal well logging  

DOE Green Energy (OSTI)

Multiconductor armored well-logging cable is used extensively by the oil and natural gas industry to lower various instruments used to measure the geological and geophysical parameters into deep wellbores. Advanced technology in oil-well drilling makes it possible to achieve borehole depths of 9 km (30,000 ft). The higher temperatures in these deeper boreholes demand advancements in the design and manufacturing of wireline cable and in the electrical insulating and armoring materials used as integral components. If geothermal energy is proved an abundant economic resource, drilling temperatures approaching and exceeding 300/sup 0/C will become commonplace. The adaptation of teflons as electrical insulating material permitted use of armored cable in geothermal wellbores where temperatures are slightly in excess of 200/sup 0/C, and where the concentrations of corrosive minerals and gases are high. Teflon materials presently used in wireline cables, however, are not capable of continuous operation at the anticipated higher temperatures.

Dennis, B.R.; Johnson, J.; Todd, B.

1981-01-01T23:59:59.000Z

140

Geophysical well logging operations and log analysis in Geothermal Well Desert Peak No. B-23-1  

DOE Green Energy (OSTI)

Geothermal Well Desert Peak No. B-23-1 was logged by Dresser Atlas during April/May 1979 to a total depth of 2939 m (9642 ft). A temperature of 209/sup 0/C (408/sup 0/F) was observed on the maximum thermometer run with one of the logging tools. Borehole tools rated to a maximum temperature of 204.4/sup 0/C (400/sup 0/F) were utilized for logging except for the Densilog tool, which was from the other set of borehole instruments, rated to a still higher temperature, i.e., 260/sup 0/C (500/sup 0/F). The quality of the logs recorded and the environmental effects on the log response have been considered. The log response in the unusual lithologies of igneous and metamorphic formations encountered in this well could be correlated with the drill cutting data. An empirical, statistical log interpretation approach has made it possible to obtain meaningful information on the rocks penetrated. Various crossplots/histograms of the corrected log data have been generated on the computer. These are found to provide good resolution between the lithological units in the rock sequence. The crossplotting techniques and the statistical approach were combined with the drill cutting descriptions in order to arrive at the lithological characteristics. The results of log analysis and recommendations for logging of future wells have been included.

Sethi, D.K.; Fertl, W.H.

1980-03-01T23:59:59.000Z

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


141

Independent Component Analysis for Filtering Airwaves in Seabed Logging Application  

E-Print Network (OSTI)

Marine controlled source electromagnetic (CSEM) sensing method used for the detection of hydrocarbons based reservoirs in seabed logging application does not perform well due to the presence of the airwaves (or sea-surface). These airwaves interfere with the signal that comes from the subsurface seafloor and also tend to dominate in the receiver response at larger offsets. The task is to identify these air waves and the way they interact, and to filter them out. In this paper, a popular method for counteracting with the above stated problem scenario is Independent Component Analysis (ICA). Independent component analysis (ICA) is a statistical method for transforming an observed multidimensional or multivariate dataset into its constituent components (sources) that are statistically as independent from each other as possible. ICA-type de-convolution algorithm that is FASTICA is considered for mixed signals de-convolution and considered convenient depending upon the nature of the source and noise model. The res...

Ansari, Adeel; Said, Abas B Md; Ansari, Seema

2013-01-01T23:59:59.000Z

142

Chemical logging- a geothermal technique | Open Energy Information  

Open Energy Info (EERE)

logging- a geothermal technique logging- a geothermal technique Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Chemical logging- a geothermal technique Details Activities (1) Areas (1) Regions (0) Abstract: Chemical logging studies conducted at the Department of Energy's Raft River Geothermal Test Site in south central Idaho resulted in the development of a technique to assist in geothermal well drilling and resource development. Calcium-alkalinity ratios plotted versus drill depth assisted in defining warm and hot water aquifers. Correlations between the calcium-alkalinity log and lithologic logs were used to determine aquifer types and detection of hot water zones 15 to 120 m before drill penetration. INEL-1 at the Idaho National Engineering Laboratory site in

143

Green Energy Resources Inc formerly New York International Log Lumber  

Open Energy Info (EERE)

New York International Log Lumber New York International Log Lumber Company Jump to: navigation, search Name Green Energy Resources Inc (formerly New York International Log & Lumber Company) Place San Antonio, Texas Product GRGR aims to export wood fiber fuel, that is environmentally certified, to overseas power generation utilities. References Green Energy Resources Inc (formerly New York International Log & Lumber Company)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Green Energy Resources Inc (formerly New York International Log & Lumber Company) is a company located in San Antonio, Texas . References ↑ "Green Energy Resources Inc (formerly New York International Log & Lumber Company)"

144

Image Logs At Coso Geothermal Area (2011) | Open Energy Information  

Open Energy Info (EERE)

Image Logs At Coso Geothermal Area (2011) Image Logs At Coso Geothermal Area (2011) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Image Logs At Coso Geothermal Area (2011) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Image Logs Activity Date 2011 Usefulness useful DOE-funding Unknown Exploration Basis Determine crustul stress heterogeneity Notes Borehole induced structures in image logs of wells from the Coso Geothermal Field (CGF) record variation in the azimuth of principal stress. Image logs of these structures from five wells were analyzed to quantify the stress heterogeneity for three geologically distinct locations: two wells within the CGF (one in an actively produced volume), two on the margin of the CGF and outside the production area, and a control well several tens of km

145

Micro-Conductivity Imager Logging Tool | Open Energy Information  

Open Energy Info (EERE)

Micro-Conductivity Imager Logging Tool Micro-Conductivity Imager Logging Tool Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Micro-Conductivity Imager Logging Tool Author Hemisphere Technologies Published Publisher Not Provided, 2011 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Micro-Conductivity Imager Logging Tool Citation Hemisphere Technologies. Micro-Conductivity Imager Logging Tool [Internet]. 2011. [cited 2013/10/09]. Available from: http://www.hemisphereoil.com/mcit.html Retrieved from "http://en.openei.org/w/index.php?title=Micro-Conductivity_Imager_Logging_Tool&oldid=687995" Categories: References Geothermal References Uncited References What links here Related changes Special pages Printable version Permanent link

146

Acoustic Logs At Coso Geothermal Area (2005) | Open Energy Information  

Open Energy Info (EERE)

Coso Geothermal Area (2005) Coso Geothermal Area (2005) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Acoustic Logs Activity Date 2005 Usefulness not indicated DOE-funding Unknown Exploration Basis Well bore fracture analysis Notes Electrical and acoustic image logs have been collected from well 58A-10 in crystalline rock on the eastern margin. Electrical image logs appear to be sensitive to variations in mineralogy, porosity, and fluid content that highlight both natural fractures and rock fabrics. These fabric elements account for about 50% of the total population of planar structures seen in the electrical image log, but locally approach 100%. Acoustic image logs reveal a similar natural fracture population, but generally image slightly fewer fractures, and do not reveal rock fabric. Both logs also record

147

Western tight gas sands advanced logging workshop proceedings  

SciTech Connect

An advanced logging research program is one major aspect of the Western Tight Sands Program. Purpose of this workshop is to help BETC define critical logging needs for tight gas sands and to allow free interchange of ideas on all aspects of the current logging research program. Sixteen papers and abstracts are included together with discussions. Separate abstracts have been prepared for the 12 papers. (DLC)

Jennings, J B; Carroll, Jr, H B [eds.

1982-04-01T23:59:59.000Z

148

Well Log Techniques At Newberry Caldera Area (DOE GTP) | Open...  

Open Energy Info (EERE)

Newberry Caldera Area (DOE GTP) Exploration Activity Details Location Newberry Caldera Area Exploration Technique Well Log Techniques Activity Date Usefulness not indicated...

149

VEHICLE USAGE LOG Department ________________________________________ Vehicle Homebase ____________________________ Week Ended (Sunday) _________________  

E-Print Network (OSTI)

VEHICLE USAGE LOG Department ________________________________________ Vehicle Homebase of the owning Unit. Vehicle Homebase: Enter the City, Zip Code, Building, or other location designation. Week

Johnston, Daniel

150

Traveling Salesman Problem Formulations with $N \\log N$ Number ...  

E-Print Network (OSTI)

Feb 13, 2013 ... Traveling Salesman Problem Formulations with $N \\log N$ Number of Binary Variables. Thomas A. Pogiatzis(tp309 ***at*** cam.ac.uk)

151

Geophysical logs from water wells in the Yakima area, Washington  

DOE Green Energy (OSTI)

The logs include: natural gamma, gamma gamma, neutron neutron, neutron gamma, caliper, fluid temperature, fluid resistivity, wall resistivity, spontaneous potential, and flow meter.

Biggane, J.H.

1983-01-01T23:59:59.000Z

152

Pressure Temperature Log At Flint Geothermal Area (DOE GTP) ...  

Open Energy Info (EERE)

Area (DOE GTP) Exploration Activity Details Location Flint Geothermal Area Exploration Technique Pressure Temperature Log Activity Date Usefulness not indicated DOE-funding Unknown...

153

FMI Log At Wister Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Wister Area (DOE GTP) Exploration Activity Details Location Wister Area Exploration Technique FMI Log Activity Date Usefulness not indicated DOE-funding Unknown References (1...

154

Pressure Temperature Log At Colrado Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

Colrado Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Pressure Temperature Log At Colrado Area (DOE GTP) Exploration Activity...

155

Pressure Temperature Log At Alum Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

Alum Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Pressure Temperature Log At Alum Geothermal Area (DOE GTP) Exploration...

156

Pressure Temperature Log At Wister Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

Wister Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Pressure Temperature Log At Wister Area (DOE GTP) Exploration Activity...

157

Pressure Temperature Log At Fort Bliss Area (DOE GTP) | Open...  

Open Energy Info (EERE)

Edit History Facebook icon Twitter icon Pressure Temperature Log At Fort Bliss Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

158

Characterization of the Germania Spraberry unit from analog studies and cased-hole neutron log data  

E-Print Network (OSTI)

The need for characterization of the Germania unit has emerged as a first step in the review, understanding and enhancement of the production practices applicable within the unit and the trend area in general. Petrophysical characterization of the Germania Spraberry units requires a unique approach for a number of reasons ?? limited core data, lack of modern log data and absence of directed studies within the unit. In the absence of the afore mentioned resources, an approach that will rely heavily on previous petrophysical work carried out in the neighboring ET O??Daniel unit (6.2 miles away), and normalization of the old log data prior to conventional interpretation techniques will be used. A log-based rock model has been able to guide successfully the prediction of pay and non-pay intervals within the ET O??Daniel unit, and will be useful if found applicable within the Germania unit. A novel multiple regression technique utilizing non-parametric transformations to achieve better correlations in predicting a dependent variable (permeability) from multiple independent variables (rock type, shale volume and porosity) will also be investigated in this study. A log data base includes digitized formats of gamma ray, cased hole neutron, limited resistivity and neutron/density/sonic porosity logs over a considerable wide area.

Olumide, Babajide Adelekan

2004-08-01T23:59:59.000Z

159

Collaborative multi-agent rock facies classification from wireline well log data  

Science Conference Proceedings (OSTI)

Gas and oil reservoirs have been the focus of modeling efforts for decades as an attempt to locate zones with high volumes. Certain subsurface layers and layer sequences, such as those containing shale, are known to be impermeable to gas and/or liquid. ... Keywords: Applied artificial intelligence, Collaborative learning, Multi-agent systems, Rock classification, Well logs

Christopher M. Gifford; Arvin Agah

2010-10-01T23:59:59.000Z

160

Resistivity Log At Alum Area (Moos & Ronne, 2010) | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit History Facebook icon Twitter icon » Resistivity Log At Alum Area (Moos & Ronne, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Single-Well and Cross-Well Resistivity At Alum Geothermal Area (Moos & Ronne, 2010) Exploration Activity Details Location Alum Geothermal Area Exploration Technique Single-Well and Cross-Well Resistivity Activity Date Usefulness useful DOE-funding Unknown Notes Density and electrical resistivity data were important to calibrate structural models based on surface surveys. Fluid flow appeared to be concentrated beneath the detachment within an interval in which some mud losses occurred while drilling, and shallow-reading resistivity logs recorded much lower values than deeper-reading logs suggesting that

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


161

An Overview of Recent Logging Research at The University of Texas Petroleum Engineering Department  

SciTech Connect

Logging research at The University of Texas has been carried out in several areas. We have studied how rock resistivity varies with water saturation when other variables, such as rock wettability, stress, saturation history, and shale content are varied. Both experimental and theoretical work have been done. Rock wettability (oil or water wet) has by far the largest effect. Shale content and saturation history are also important. Rock stress is the least important, at least in the Berea sandstones and glass bed packs we have studied. We have published several papers and theses which describe this work in detail. We have also studied the effect of certain trace elements (boron, mainly) on the neutron log. Boron has a very high thermal neutron capture cross Section. Analyses of a number of Frio formation cores from the Texas Gulf Coast area show that boron occurs frequently in these rocks in amounts (up to 100 ppm or more) that would seriously affect several procedures in neutron log interpretation. It could, for example, reduce or even eliminate the neutron log--density log porosity reversal that is commonly used as a gas indicator. A recent paper reports details of our work in the Frio. We are currently extending our trace element studies to the West Texas area. The lower porosities occurring there make a given boron content in the rock even more important than in the higher porosity Gulf Coast area. Another effort has been the application of logging data to obtain better estimates of rock type, and inferentially, rock permeability. The work is semi-empirical, and results are usually limited in application geographically. These results can be very important, however; for example, when extrapolating core data to parts of a field where no cores were taken. Several papers have reported details of this work, which is continuing. Finally, we have advised the Department of Energy on logging programs and problems in the Geothermal-Geopressured research effort. In the early phases of the work we studied why water resistivities calculated from the self potential log were so often wrong. and showed that most of the error came from use of incorrect mud filtrate resistivities in the calculation. Several papers and theses give details of this research. A recent problem has been the estimation of free gas saturation in a deep, thick, geopressured sand in the Hulin Well in South Louisiana. A pulsed neutron log run recently in this well supports free gas indications from open hole resistivity logs run in this well earlier by Superior Oil Company. The presence of free gas here is important, since the gas/water ratio from this zone will be much larger if free gas is present. Future logging research under consideration or being started at The University of Texas includes (1) petrophysical problems in tight gas sands (bimodal porosity systems, trace element effects, etc.), (2) resistivity versus water saturation relations at high desaturation pressures (1500 psi), and (3) improved theoretical and computer modeling of rock resistivity as affected by water saturation, rock wettability, saturation history, etc. Support of logging research at The University of Texas is currently from the Department of Energy and from a consortium of companies and organizations (Gas Research Institute, logging companies, and oil companies).

Dunlap, H.F.

1989-03-21T23:59:59.000Z

162

Real-Time System Log Monitoring/Analytics Framework  

SciTech Connect

Analyzing system logs provides useful insights for identifying system/application anomalies and helps in better usage of system resources. Nevertheless, it is simply not practical to scan through the raw log messages on a regular basis for large-scale systems. First, the sheer volume of unstructured log messages affects the readability, and secondly correlating the log messages to system events is a daunting task. These factors limit large-scale system logs primarily for generating alerts on known system events, and post-mortem diagnosis for identifying previously unknown system events that impacted the systems performance. In this paper, we describe a log monitoring framework that enables prompt analysis of system events in real-time. Our web-based framework provides a summarized view of console, netwatch, consumer, and apsched logs in real- time. The logs are parsed and processed to generate views of applications, message types, individual/group of compute nodes, and in sections of the compute platform. Also from past application runs we build a statistical profile of user/application characteristics with respect to known system events, recoverable/non-recoverable error messages and resources utilized. The web-based tool is being developed for Jaguar XT5 at the Oak Ridge Leadership Computing facility.

Oral, H Sarp [ORNL; Dillow, David A [ORNL; Park, Byung H [ORNL; Shipman, Galen M [ORNL; Geist, Al [ORNL; Gunasekaran, Raghul [ORNL

2011-01-01T23:59:59.000Z

163

Policy auditing over incomplete logs: theory, implementation and applications  

Science Conference Proceedings (OSTI)

We present the design, implementation and evaluation of an algorithm that checks audit logs for compliance with privacy and security policies. The algorithm, which we name reduce, addresses two fundamental challenges in compliance checking that arise ... Keywords: audit, formal logic, incomplete logs, privacy policy

Deepak Garg; Limin Jia; Anupam Datta

2011-10-01T23:59:59.000Z

164

Mining web query logs to analyze political issues  

Science Conference Proceedings (OSTI)

We present a novel approach to using anonymized web search query logs to analyze and visualize political issues. Our starting point is a list of politically annotated blogs (left vs. right). We use this list to assign a numerical political leaning to ... Keywords: opinion mining and sentiment analysis, partisanship, political leaning, web search logs

Ingmar Weber; Venkata Rama Kiran Garimella; Erik Borra

2012-06-01T23:59:59.000Z

165

Image Logs At Coso Geothermal Area (2004) | Open Energy Information  

Open Energy Info (EERE)

Logs At Coso Geothermal Area (2004) Logs At Coso Geothermal Area (2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Image Logs At Coso Geothermal Area (2004) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Image Logs Activity Date 2004 Usefulness not indicated DOE-funding Unknown Exploration Basis EGS potential of Coso Geothermal Region Notes During the second year of this project, wellbore logs and stress data were acquired in a new production well drilled in the Coso Geothermal Field, 38C-9. The image analysis results include the discrimination of natural from drilling induced fractures in wellbore image data, natural fracture characterization, and wellbore failure analysis References Sheridan, J.; Hickman, S.H. (1 January 2004) IN SITU STRESS,

166

Selecting The Optimal Logging Suite For Geothermal Reservoir Evaluation-  

Open Energy Info (EERE)

Selecting The Optimal Logging Suite For Geothermal Reservoir Evaluation- Selecting The Optimal Logging Suite For Geothermal Reservoir Evaluation- Results From The Alum 25-29 Well, Nevada Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Selecting The Optimal Logging Suite For Geothermal Reservoir Evaluation- Results From The Alum 25-29 Well, Nevada Details Activities (6) Areas (1) Regions (0) Abstract: This paper presents the results of analysis of a state of the art set of wireline petrophysical and wellbore image logs recorded in the Alum 25-29 well, southwestern Nevada. The Alum well penetrated nearly 2000 ft (610 m) of volcano-clastic rocks and more than 1000 ft of basement, separated from the sediments by a shallowly dipping detachment fault. The logs were acquired both to characterize the site and also to select the

167

Log Homes in REScheck | Building Energy Codes Program  

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

Log Homes in REScheck Log Homes in REScheck This training includes an introduction to how log homes are handled in the REScheck(tm) software and demonstrates how to show compliance for log homes using REScheck. Estimated Length: 56 minutes Presenters: Rob Picket, Log Homes Council Heather Dillon and Pam Cole, Pacific Northwest National Laboratory Original Webcast Date: Thursday, February 16, 2006 - 13:00 CEUs Offered: 1.0 AIA/CES LU (HSW); .10 CEUs towards ICC renewal certification. Course Type: Video Downloads: Presentation Slides Video Watch on YouTube Visit the BECP Online Training Center for instructions on how to obtain a certificate of completion. Building Type: Residential Focus: Compliance Code Version: International Energy Conservation Code (IECC) Software: REScheck Target Audience:

168

Geothermal well log interpretation state of the art. Final report  

DOE Green Energy (OSTI)

An in-depth study of the state of the art in Geothermal Well Log Interpretation has been made encompassing case histories, technical papers, computerized literature searches, and actual processing of geothermal wells from New Mexico, Idaho, and California. A classification scheme of geothermal reservoir types was defined which distinguishes fluid phase and temperature, lithology, geologic province, pore geometry, salinity, and fluid chemistry. Major deficiencies of Geothermal Well Log Interpretation are defined and discussed with recommendations of possible solutions or research for solutions. The Geothermal Well Log Interpretation study and report has concentrated primarily on Western US reservoirs. Geopressured geothermal reservoirs are not considered.

Sanyal, S.K.; Wells, L.E.; Bickham, R.E.

1980-01-01T23:59:59.000Z

169

Fluid-temperature logs for selected wells in eastern Washington  

DOE Green Energy (OSTI)

This Open-File Report consists of fluid temperature logs compiled during studies of the geohydrology and low temperature geothermal resources of eastern Washington. The fluid temperature logs are divided into two groups. Part A consists of wells which are concentrated in the Moses Lake-Ritzville-Connell area. Full geophysical log suites for many of these wells are presented in Stoffel and Widness (1983) and discussed in Widness (1983, 1984). Part B consists of wells outside of the Moses Lake-Ritzville-Connell study area.

Stoffel, K.L.; Widness, S. (comps.)

1983-12-01T23:59:59.000Z

170

Acoustic Logs At Coso Geothermal Area (1977) | Open Energy Information  

Open Energy Info (EERE)

Coso Geothermal Area (1977) Coso Geothermal Area (1977) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Acoustic Logs At Coso Geothermal Area (1977) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Acoustic Logs Activity Date 1977 Usefulness not indicated DOE-funding Unknown Notes Acoustic logs indicate fractured rock and potentially permeable zones. References Galbraith, R. M. (1 May 1978) Geological and geophysical analysis of Coso Geothermal Exploration Hole No. 1 (CGEH-1), Coso Hot Springs KGRA, California Goranson, C.; Schroeder, R. (1 June 1978) Static downhole characteristics of well CGEH-1 at Coso Hot Springs, China Lake, California Retrieved from "http://en.openei.org/w/index.php?title=Acoustic_Logs_At_Coso_Geothermal_Area_(1977)&oldid=510216"

171

Symposium on high-temperature well-logging instrumentation  

DOE Green Energy (OSTI)

The symposium contains papers about developments in borehole logging instrumentation that can withstand downhole temperatures in excess of 300/sup 0/C and pressures greater than 103 MPa. Separate abstracts have been prepared for individual papers. (ACR)

Dennis, B.R. (comp.)

1986-06-01T23:59:59.000Z

172

Energy Efficiency in Log Homes | Department of Energy  

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

Energy Code Compliance Because log homes don't have conventional wood-stud walls and insulation, they often don't satisfy building code energy standards that require...

173

Logging, Testing and Monitoring Geothermal Wells | Open Energy Information  

Open Energy Info (EERE)

Logging, Testing and Monitoring Geothermal Wells Logging, Testing and Monitoring Geothermal Wells Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Logging, Testing and Monitoring Geothermal Wells Abstract Wells or boreholes are essential components in both geothermal research and utilization as they enable a drastic increase in geothermal energy production beyond natural out-flow as well as providing access deep into the systems, not otherwise possible. Wells also play a vital role in all geothermal reservoir physics (also called reservoir engineering) research, which would be particularly ineffec-tive without the access into geothermal systems provided by wells. During drilling the main reservoir physics research is performed through logging of different parameters as functions

174

Miniatuization of the flowing fluid electric conductivity logging tec hnique  

E-Print Network (OSTI)

but the excess oil drips into the well and accumulates onwater. In this well, the top of the oil layer began aboutincluding the well we logged, a layer of oil was present

Su, Grace W.; Quinn, Nigel W.T.; Cook, Paul J.; Shipp, William

2005-01-01T23:59:59.000Z

175

Shift Turnover and Log Keeping for Fossil Generating Stations  

Science Conference Proceedings (OSTI)

Decreases in staff productivity, lost generation, and adverse events are occurring in the industry as a result of less-than-effective communication during shift turnovers and log-keeping practices that do not provide sufficient information on plant and equipment status. The shift turnover and log-keeping practices observed at numerous fossil generating stations vary between best in the industry to ineffective, and most stations have had equipment failures and lost efficiencies as a result of less-than-ef...

2010-12-19T23:59:59.000Z

176

Fluid-Rock Characterization and Interactions in NMR Well Logging  

SciTech Connect

The objective of this project was to characterize the fluid properties and fluid-rock interactions that are needed for formation evaluation by NMR well logging. The advances made in the understanding of NMR fluid properties are summarized in a chapter written for an AAPG book on NMR well logging. This includes live oils, viscous oils, natural gas mixtures, and the relation between relaxation time and diffusivity.

Hirasaki, George J.; Mohanty, Kishore K.

2003-02-10T23:59:59.000Z

177

Computerized coal-quality prediction from digital geophysical logs  

SciTech Connect

A digital suite of geophysical logs, including gamma-ray, resistivity and gamma-gamma density, were used to develop and test a method for predicting coal quality parameters for the Wyodak coal in the Powder River basin of Wyoming. The method was developed by plotting the average of various log response increments (obtained from the contractor's 9-track digital tapes) versus the analytically determined ash, moisture, and Btu/lb for the same intervals of the coal seam. Standard curve-fitting techniques were then employed to determine which log response parameter most accurately predicted the various quality parameters. A computer program was written that reads 9-track, digital, log tapes and determines the coal quality parameters based on the relationships between log response and analytical values. The computer program was written in Fortran 77 for a VAX 11/780 minicomputer. The program was designed to run interactively with user-determined options depending on which geophysical logs were available. Preliminary results have been very encouraging to date with predicted versus analytically determined parameters being estimated to an accuracy of +/-300 Btu/lb (with the average being +/-150 Btu/lb), +/-2% ash and +/-3% moisture. This compares to ASTM lab-to-lab analytical standards of +/-100 Btu/lb, +/-0.7% ash, and +/-0.5% moisture. This prediction methods is applicable to coals from other basins and offers promise as a cost saving tool for exploration and production uses.

Nations, D.L.; Tabet, D.E.; Gerould, C.R.

1984-07-01T23:59:59.000Z

178

Monitoring Selective Logging in Tropical Evergreen Forests Using Landsat: Multitemporal Regional Analyses in Mato Grosso, Brazil  

Science Conference Proceedings (OSTI)

Selective logging degrades tropical forests. Logging operations vary in timing, location, and intensity. Evidence of this land use is rapidly obscured by forest regeneration and ongoing deforestation. A detailed study of selective logging ...

Eraldo A. T. Matricardi; David L. Skole; Mark A. Cochrane; Jiaguo Qi; Walter Chomentowski

2005-11-01T23:59:59.000Z

179

Data Compendium for the Logging Test Pits at the ERDA Grand Junction...  

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

Data Compendium for the Logging Test Pits at the ERDA Grand Junction Compound (December 1975) Data Compendium for the Logging Test Pits at the ERDA Grand Junction Compound...

180

Density Log at Fort Bliss Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Density Log at Fort Bliss Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Density Log at Fort Bliss Area (DOE GTP) Exploration...

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


181

Connect & Log In | Argonne Leadership Computing Facility  

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

Account Information Accounts and Access FAQ Connect & Log In Using CRYPTOCards SSH Keys on Surveyor Disk Space Quota Management Allocations Decommissioning of BG/P Systems and Resources Blue Gene/Q Versus Blue Gene/P Mira/Cetus/Vesta Intrepid/Challenger/Surveyor Tukey Eureka / Gadzooks Policies Documentation Feedback Please provide feedback to help guide us as we continue to build documentation for our new computing resource. [Feedback Form] Connect & Log In Users log into ALCF resources via ssh. ssh mira.alcf.anl.gov -l Resources that are accessible via ssh are vesta.alcf.anl.gov, mira.alcf.anl.gov, surveyor.alcf.anl.gov, intrepid.alcf.anl.gov, cetus.alcf.anl.gov, challenger.alcf.anl.gov, tukey.alcf.anl.gov, eureka.alcf.anl.gov, and gadzooks.alcf.anl.gov.

182

Acoustic Logs At Raft River Geothermal Area (1979) | Open Energy  

Open Energy Info (EERE)

Raft River Geothermal Area (1979) Raft River Geothermal Area (1979) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Acoustic Logs Activity Date 1979 Usefulness useful DOE-funding Unknown Exploration Basis To permit the lateral and vertical extrapolation of core and test data and bridged the gap between surface geophysical data and core analyses. Notes Televiewer logs permitted the location and orientation of numerous fractures and several features that may be faults. References Keys, W. S.; Sullivan, J. K. (1 June 1979) Role of borehole geophysics in defining the physical characteristics of the Raft River geothermal reservoir, Idaho Retrieved from "http://en.openei.org/w/index.php?title=Acoustic_Logs_At_Raft_River_Geothermal_Area_(1979)&oldid=473816"

183

Density Log at Valles Caldera - Redondo Area (Wilt & Haar, 1986) | Open  

Open Energy Info (EERE)

Valles Caldera - Redondo Area (Wilt & Haar, 1986) Valles Caldera - Redondo Area (Wilt & Haar, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Density at Valles Caldera - Redondo Area (Wilt & Haar, 1986) Exploration Activity Details Location Valles Caldera - Redondo Area Exploration Technique Density Log Activity Date Usefulness not indicated DOE-funding Unknown Notes The density log indicates three major density units within the well section : a surface layer of caldera fill, lake deposits, and other recent alluvium (2.12 g/cm3); the Bandelier Tuff and underlying volcanic and sedimentary units (2.3--2.5 g/cm3); and the basement unit, consisting of the lower Paleozoic and the upper Precambrian (2.65 g/cm3). There are, of course, significant density variations within each unit, but for modeling

184

Logging and Agricultural Residue Supply Curves for the Pacific Northwest  

DOE Green Energy (OSTI)

This report quantified the volume of logging residues at the county level for current timber harvests. The cost of recovering logging residues was determined for skidding, yearding, loading, chipping and transporting the residues. Supply curves were developed for ten candidate conversion sites in the Pacific Northwest Region. Agricultural field residues were also quantified at the county level using five-year average crop yields. Agronomic constraints were applied to arrive at the volumes available for energy use. Collection costs and transportation costs were determined and supply curves generated for thirteen candidate conversion sites.

Kerstetter, James D.; Lyons, John Kim

2001-01-01T23:59:59.000Z

185

SecLaaS: secure logging-as-a-service for cloud forensics  

Science Conference Proceedings (OSTI)

Cloud computing has emerged as a popular computing paradigm in recent years. However, today's cloud computing architectures often lack support for computer forensic investigations. Analyzing various logs (e.g., process logs, network logs) plays a vital ... Keywords: cloud forensics, cloud security, forensic investigation, logging-as-a-service

Shams Zawoad, Amit Kumar Dutta, Ragib Hasan

2013-05-01T23:59:59.000Z

186

Correlations to determine in-situ stress from open-hole logging data in sandstone reservoirs  

E-Print Network (OSTI)

Knowledge of in-situ stress distribution within reservoir sandstones and the surrounding formations is recognized as one of the most important factors in the design and analysis of hydraulic fractures. In-situ stress contrast between layers of rock ultimately controls the vertical fracture growth and, thus, directly affects fracture length and width. A new correlation model has been developed for estimating in-situ stress distribution within different interlayers. The method correlates values of minimum principal in-situ stress derived from both open-hole log data and cased-hole stress tests and gamma ray readings. The information used during this research project came from the Gas Research Institute (GRI's) Staged Field Experiment (SFE) No. I and No.2 wells. The new parameter correlation developed in this research has been applied to the Travis Peak Formation in East Texas. The advantages of the new correlation are (1) for a routine application, the correlations provide the most useful source of in-situ stress determination in the Travis Peak Formation, (2) the effect of shale has been considered in the correlation model, and (3) the model is easy to use once the lithology of the layer has been identified. This new model can be used to estimate in-situ stress distribution from logs and cores. However, it is important that these estimates be calibrated with actual field measurements of in-situ stress. Once the model correlation model has been calibrated, the petroleum engineer can reduce the cost of developing data sets for conducted reservoir studies by using only logs to estimate the in-situ stress profile.

Gongora, Cesar Augusto

1995-01-01T23:59:59.000Z

187

Vol. 43, No. 3 December 1999 Mariners Weather Log  

E-Print Network (OSTI)

approved by the director of the Office of Management and Budget through December 1999. The Mariners Weather Log (ISSN: 0025-3367) is published by the National Weather Service, Office of Meteorology, Integrated. Rick Kenney, the AMVER Maritime Relations Officer for more information (see contact information

188

Characterizing the usability of interactive applications through query log analysis  

Science Conference Proceedings (OSTI)

People routinely rely on Internet search engines to support their use of interactive systems: they issue queries to learn how to accomplish tasks, troubleshoot problems, and otherwise educate themselves on products. Given this common behavior, we argue ... Keywords: query log analysis, usability

Adam Fourney; Richard Mann; Michael Terry

2011-05-01T23:59:59.000Z

189

A unified representation of web logs for mining applications  

Science Conference Proceedings (OSTI)

The collective feedback of the users of an Information Retrieval (IR) system has been shown to provide semantic information that, while hard to extract using standard IR techniques, can be useful in Web mining tasks. In the last few years, several approaches ... Keywords: Query recommendations, Query similarity, Query suggestions, Text categorization for the web, User feedback, Web logs

Michelangelo Diligenti; Marco Gori; Marco Maggini

2011-06-01T23:59:59.000Z

190

Logging threatens Indonesia's biodiversity By Dianthus Saputra Estey in Jakarta  

E-Print Network (OSTI)

Logging threatens Indonesia's biodiversity By Dianthus Saputra Estey in Jakarta Monday 13 October 2003, 16:57 Makka Time, 13:57 GMT A tenth of the world's tropical rainforests lie in Indonesia year," Togu Manurung from Forest Watch Indonesia said. This ranks the depletion of Indonesia

191

Prediction of Web Page Accesses by Proxy Server Log  

Science Conference Proceedings (OSTI)

As the population of web users grows, the variety of user behaviors on accessing information also grows, which has a great impact on the network utilization. Recently, many efforts have been made to analyze user behaviors on the WWW. In this paper, we ... Keywords: WWW, data mining, prediction, proxy server log, suffix tree, user behavior

Yi-Hung Wu; Arbee L. P. Chen

2002-05-01T23:59:59.000Z

192

Mining Query Logs: Turning Search Usage Data into Knowledge  

Science Conference Proceedings (OSTI)

Web search engines have stored in their logs information about users since they started to operate. This information often serves many purposes. The primary focus of this survey is on introducing to the discipline of query mining by showing its foundations ...

Fabrizio Silvestri

2010-01-01T23:59:59.000Z

193

Dual-cone double-helical downhole logging device  

DOE Patents (OSTI)

A broadband downhole logging device includes a double-helix coil wrapped over a dielectric support and surrounded by a dielectric shield. The device may also include a second coil longitudinally aligned with a first coil and enclosed within the same shield for measuring magnetic permeability of downhole formations and six additional coils for accurately determining downhole parameters.

Yu, Jiunn S. (Albuquerque, NM)

1984-01-01T23:59:59.000Z

194

The Search for the Manila Galleon Log Books  

Science Conference Proceedings (OSTI)

Spanish merchant ships, called Manila Galleons, made the round-trip between the Philippine Islands and the ports on the west coast of what is now Mexico, almost every year for the 250-yr period between 1565 and 1815. The log books of these ...

Wayne V. Burt

1990-11-01T23:59:59.000Z

195

SPE-163690-MS Synthetic, Geomechanical Logs for Marcellus Shale  

E-Print Network (OSTI)

SPE-163690-MS Synthetic, Geomechanical Logs for Marcellus Shale M. O. Eshkalak, SPE, S. D of hydrocarbons from the reservoirs, notably shale, is attributed to realizing the key fundamentals of reservoir and mineralogy is crucial in order to identify the "right" pay-zone intervals for shale gas production. Also

Mohaghegh, Shahab

196

Well Log Techniques At Coso Geothermal Area (1985) | Open Energy  

Open Energy Info (EERE)

Coso Geothermal Area (1985) Coso Geothermal Area (1985) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Well Log Techniques Activity Date 1985 Usefulness not indicated DOE-funding Unknown Exploration Basis Impact of long term testing on the well pressure Notes The downhole pressure monitoring equipment for each well included a stainless steel pressure chamber attached to a 0.25 inch stainless steel capillary tubing. The surface end of the capillary tubing was connected to a Paroscientific quartz pressure trandsducer. References Sanyal, S.; Menzies, A.; Granados, E.; Sugine, S.; Gentner, R. (20 January 1987) Long-Term Testing of Geothermal Wells in the Coso Hot Springs KGRA Retrieved from "http://en.openei.org/w/index.php?title=Well_Log_Techniques_At_Coso_Geothermal_Area_(1985)&oldid=600462

197

Slimhole Drilling, Logging, and Completion Technology - An Update  

DOE Green Energy (OSTI)

Using slim holes (diameter < 15 cm) for geothermal exploration and small-scale power production can produce significant cost savings compared to conventional rotary-drilling methods. In addition, data obtained from slim holes can be used to lower the risks and costs associated with the drilling and completion of large-diameter geothermal wells. As a prime contractor to the U.S. Department of Energy (DOE), Sandia National Laboratories has worked with industry since 1992 to develop and promote drilling, testing, and logging technology for slim holes. This paper describes the current status of work done both in-house and contracted to industry. It focuses on drilling technology, case histories of slimhole drilling projects, data collection and rig instrumentation, and high-temperature logging tools.

FINGER,JOHN T.; JACOBSON,RONALD D.

1999-10-07T23:59:59.000Z

198

Evaluation of a geothermal well logging, DST and Pit test  

DOE Green Energy (OSTI)

This paper briefly discusses logging and testing operations and certain related physical aspects in geothermal well evaluations. A good understanding of thermal and hydrological characteristics of geothermal reservoirs are essential in geothermal well evaluations. Within geothermal reservoirs, in evaluating the wells, the two most important parameters that first could be estimated, then measured or calculated, are temperature and productivity. Well logs and wireline surveys are means of measuring formation temperatures. Drill Stem Tests (DST's) or Pit Tests are means of determining formation productivity. Geochemistry and Petrology are currently accepted as two evaluation yardsticks in geothermal well evaluations. investigations of cuttings and cores during drilling operations, along with studies on formation waters could be used in a predictive nature for temperature and productivity and could yield useful information on the resource.

Tansev, Erdal O.

1978-01-01T23:59:59.000Z

199

Gradually Truncated Log-normal distribution- Size distribution of firms  

E-Print Network (OSTI)

Many natural and economical phenomena are described through power law or log-normal distributions. In these cases, probability decreases very slowly with step size compared to normal distribution. Thus it is essential to cut-off these distributions for larger step size. Recently we introduce the gradually truncated power law distribution to successfully describe variation of financial, educational, physical and citation index. In the present work, we introduce gradually truncated log-normal distribution in which we gradually cut-off larger steps due to physical limitation of the system. We applied this distribution successfully to size distribution of USAs manufactoring firms which is measured through their annual sell. The physical limitation are due to limited market size or shortage of highly competent executives. I.

Hari M. Gupta; Jos R. Campanha

2008-01-01T23:59:59.000Z

200

Development of geothermal logging systems in the United States  

DOE Green Energy (OSTI)

Logging technologies developed for hydrocarbon resource evaluation have not migrated into geothermal applications even though data so obtained would strengthen reservoir characterization efforts. Two causative issues have impeded progress: (1) there is a general lack of vetted, high-temperature instrumentation, and (2) the interpretation of log data generated in a geothermal formation is in its infancy. Memory-logging tools provide a path around the first obstacle by providing quality data at a low cost. These tools feature on-board computers that process and store data, and newer systems may be programmed to make decisions. Since memory tools are completely self-contained, they are readily deployed using the slick line found on most drilling locations. They have proven to be rugged, and a minimum training program is required for operator personnel. Present tools measure properties such as temperature and pressure, and the development of noise, deviation, and fluid conductivity logs based on existing hardware is relatively easy. A more complex geochemical tool aimed at a quantitative analysis of (potassium, uranium and thorium) is in the calibration phase, and it is expandable into all nuclear measurements common in the hydrocarbon industry. A fluid sampling tool is in the design phase. All tools are designed for operation at conditions exceeding 400 C, and for deployment in the slim holes produced by mining-coring operations. Partnerships are being formed between the geothermal industry and scientific drilling programs to define and develop inversion algorithms relating raw tool data to more pertinent information. These cooperative efforts depend upon quality guidelines such as those under development within the international Ocean Drilling Program.

Lysne, P.

1994-04-01T23:59:59.000Z

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


201

Characterizing Application Runtime Behavior from System Logs and Metrics  

Science Conference Proceedings (OSTI)

Large-scale systems are heavily shared resource environments where a mix of applications are launched concurrently competing for network and storage resources. It is essential to characterize the runtime behavior of these applications for provisioning system resources and understanding the impact of application s performance when competing for resources. In this paper, we study the use of zero- and low-overhead system logs and other system metric data for characterizing the runtime behavior of several applications. We present our preliminary work on estimating individual application s I/O demands by observing file system usage pattern over multiple runs, and interpreting application s network utilization characteristics by observing link-layer error logs. We also present preliminary findings on using such information in making context-sensitive scheduling decisions that minimize potentially negative interactions between applications competing for shared resources. Our analysis is based on four months of system log data collected on one of the world s largest supercomputing facilities, the Jaguar XT5 petaflop system at Oak Ridge National Laboratory.

Gunasekaran, Raghul [ORNL; Dillow, David A [ORNL; Shipman, Galen M [ORNL; Vuduc, Richard [Georgia Institute of Technology; Chow, Edmond [Georgia Institute of Technology

2011-01-01T23:59:59.000Z

202

Gamma Log At Alum Area (Moos & Ronne, 2010) | Open Energy Information  

Open Energy Info (EERE)

Gamma Log At Alum Area (Moos & Ronne, 2010) Gamma Log At Alum Area (Moos & Ronne, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Gamma Log At Alum Geothermal Area (Moos & Ronne, 2010) Exploration Activity Details Location Alum Geothermal Area Exploration Technique Gamma Log Activity Date Usefulness useful DOE-funding Unknown Notes Density, photo-electric factor (PEF), neutron, and gamma ray (GR) logs provided sufficient information to clearly delineate basement lithologic variations, suggesting that pulsed neutron logs may not in many cases be needed, References Daniel Moos, Joel Ronne (2010) Selecting The Optimal Logging Suite For Geothermal Reservoir Evaluation- Results From The Alum 25-29 Well, Nevada Retrieved from "http://en.openei.org/w/index.php?title=Gamma_Log_At_Alum_Area_(Moos_%26_Ronne,_2010)&oldid=510779"

203

V-068: Citrix CloudPlatform Logs Potentially Sensitive Information in the  

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

8: Citrix CloudPlatform Logs Potentially Sensitive Information 8: Citrix CloudPlatform Logs Potentially Sensitive Information in the Log File V-068: Citrix CloudPlatform Logs Potentially Sensitive Information in the Log File January 14, 2013 - 12:15am Addthis PROBLEM: Citrix CloudPlatform Logs Potentially Sensitive Information in the Log File PLATFORM: Citrix CloudStack and CloudPlatform up to and including 3.0.5. ABSTRACT: A vulnerability was reported in Citrix CloudPlatform. REFERENCE LINKS: Document ID: CTX136163 SecurityTracker Alert ID: 1027978 CVE-2012-5616 IMPACT ASSESSMENT: Medium DISCUSSION: A vulnerability has been identified in Citrix CloudPlatform, formerly known as Citrix CloudStack, that could result in security-sensitive information being logged during the normal operation of the CloudPlatform server. IMPACT:

204

Well Log Techniques At Raft River Geothermal Area (1977) | Open Energy  

Open Energy Info (EERE)

Well Log Techniques At Raft River Geothermal Area Well Log Techniques At Raft River Geothermal Area (1977) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Well Log Techniques Activity Date 1977 Usefulness not indicated DOE-funding Unknown Exploration Basis Characterize the rock using well log data. Notes Information is given on the following logs: dual-induction focused log, including resistivity, sp, and conductivity; acoustic log; compensated neutron; compensated densilog; and caliper. Lithologic breaks for a drill core to a depth of 2840 ft are illustrated. References Covington, H.R. (1 January 1978) Deep drilling data, Raft River geothermal area, Idaho Raft River geothermal exploration well No. 4 Retrieved from "http://en.openei.org/w/index.php?title=Well_Log_Techniques_At_Raft_River_Geothermal_Area_(1977)&oldid=6004

205

Beehive: large-scale log analysis for detecting suspicious activity in enterprise networks  

Science Conference Proceedings (OSTI)

As more and more Internet-based attacks arise, organizations are responding by deploying an assortment of security products that generate situational intelligence in the form of logs. These logs often contain high volumes of interesting and useful information ...

Ting-Fang Yen, Alina Oprea, Kaan Onarlioglu, Todd Leetham, William Robertson, Ari Juels, Engin Kirda

2013-12-01T23:59:59.000Z

206

Multidimensional mining of large-scale search logs: a topic-concept cube approach  

Science Conference Proceedings (OSTI)

In addition to search queries and the corresponding clickthrough information, search engine logs record multidimensional information about user search activities, such as search time, location, vertical, and search device. Multidimensional mining of ... Keywords: olap, search log, topic-concept cube

Dongyeop Kang; Daxin Jiang; Jian Pei; Zhen Liao; Xiaohui Sun; Ho-Jin Choi

2011-02-01T23:59:59.000Z

207

Surface Soil Changes Following Selective Logging in an Eastern Amazon Forest  

Science Conference Proceedings (OSTI)

In the Brazilian Amazon, selective logging is second only to forest conversion in its extent. Conversion to pasture or agriculture tends to reduce soil nutrients and site productivity over time unless fertilizers are added. Logging removes ...

Lydia P. Olander; Mercedes M. Bustamante; Gregory P. Asner; Everaldo Telles; Zayra Prado; Plnio B. Camargo

2005-04-01T23:59:59.000Z

208

Neutron Log At Alum Area (Moos & Ronne, 2010) | Open Energy Information  

Open Energy Info (EERE)

Neutron Log At Alum Area (Moos & Ronne, 2010) Neutron Log At Alum Area (Moos & Ronne, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Neutron Log At Alum Geothermal Area (Moos & Ronne, 2010) Exploration Activity Details Location Alum Geothermal Area Exploration Technique Neutron Log Activity Date Usefulness useful DOE-funding Unknown Notes Density, photo-electric factor (PEF), neutron, and gamma ray (GR) logs provided sufficient information to clearly delineate basement lithologic variations, suggesting that pulsed neutron logs may not in many cases be needed, References Daniel Moos, Joel Ronne (2010) Selecting The Optimal Logging Suite For Geothermal Reservoir Evaluation- Results From The Alum 25-29 Well, Nevada Retrieved from "http://en.openei.org/w/index.php?title=Neutron_Log_At_Alum_Area_(Moos_%26_Ronne,_2010)&oldid=511025"

209

Logging technology for high-temperature geothermal boreholes  

DOE Green Energy (OSTI)

Research in materials, equipment, and instrument development was required in the Hot Dry Rock Energy Extraction Demonstration at Fenton Hill located in northern New Mexico. Results of this extensive development advanced the logging technology in geothermal boreholes to present state-of-the art. The new Phase II Energy Extraction System at the Fenton Hill Test Site will consist of two wellbores drilled to a depth of about 4570 m (15,000 ft) and then connected by a series of hydraulic-induced fractures. The first borehole (EE-2) was completed in May of 1980 at a depth of 4633 m (15,200 ft) of which approximately 3960 m (13,000 ft) is in Precambrian granitic rock. Starting at a depth of approximately 2930 m (9600 ft), the borehole was inclined up to 35/sup 0/ from vertical. Bottom-hole temperature in EE-2 is 320/sup 0/C. The EE-3 borehole was then drilled to a depth of 4236 m (13,900 ft). Its inclined part is positioned directly over the EE-2 wellbore with a vertical separation of about 450 m (1500 ft) between them. Many of the geophysical measurements needed to develop the hot dry rock concept are unique. Most of the routine instruments used in petroleum drilling fail in the hot and abrasive environment. New equipment developed includes not only the downhole sonde that houses the transducer and associated line driving electronics, but modifications also were needed on the entire data retrieval systems and associated data analysis technology. Successful performance of wellbore surveys in the EE-2 and EE-3 boreholes depended upon the capacity of the sensors, instrument sonde, cablehead, and armored logging cable to work in this severe environment. The major areas of materials development for surveying the boreholes in the high-temperature environment were on elastomeric seals, electrical insulation for logging cables, downhole sensors, and associated downhole electronic and electro-mechanical components.

Dennis, B.R.

1984-05-01T23:59:59.000Z

210

Hourly analysis of a very large topically categorized web query log  

Science Conference Proceedings (OSTI)

We review a query log of hundreds of millions of queries that constitute the total query traffic for an entire week of a general-purpose commercial web search service. Previously, query logs have been studied from a single, cumulative view. In contrast, ... Keywords: query log analysis, web search

Steven M. Beitzel; Eric C. Jensen; Abdur Chowdhury; David Grossman; Ophir Frieder

2004-07-01T23:59:59.000Z

211

User logs as a means to enrich and refine translation dictionaries  

Science Conference Proceedings (OSTI)

This paper presents the participation of the CACAO prototype to the Log Analysis for Digital Societies (LADS) task of LogCLEF 2009 track. In our experiment we investigated the possibility to exploit the TEL logs data as a source for inferring new translations, ...

Alessio Bosca; Luca Dini

2009-09-01T23:59:59.000Z

212

An Overview of Logging Safety Programs in the USA. Working Paper #43  

E-Print Network (OSTI)

An Overview of Logging Safety Programs in the USA. Working Paper #43 Louisiana Forest Products;1 An Overview of Logging Safety Programs in the USA. a paper presented by Cornelis F. de Hoop Associate throughout the USA to reduce logging accidents and assist loggers with safety programs. Driven by accident

213

Application of Self-Organizing Competitive Network in Lithologic Identification of the Logging Data  

Science Conference Proceedings (OSTI)

The geological information of logging data is very important for people to determine oil reserves and make the plan of exploitation. So it is essential to identify litho logy of the logging data. Neural network with self-organizing, self-learning and ... Keywords: self-organizing, competitive network, log data to identify lithology, MATLAB

Ren Guo-Feng; Tian Zhu-Mei

2012-07-01T23:59:59.000Z

214

Appendix A Lithologic and Monitor Well Completion Logs  

Office of Legacy Management (LM)

A A Lithologic and Monitor Well Completion Logs This page intentionally left blank WELL INSTALLATION BLANK CASING: 1.25 in. Stainless Steel 0.0 to 0.35 METHOD WELL SCREEN: 1.25 in. Stainless Steel 0.35 to 3.27 DATE DEVELOPED SUMPIEND CAP: 1.25 in. Stainless Steel 3.27 to 3.58 WATER LEVEL (FT BGS) SURFACE SEAL: LOGGED BY P. McKenzie REMARKS Drillers hit water at 5 fl: well point removed. LITHOLOGIC DESCRIPTION LOCATION SHIPROCK, NM SURFACE ELEV. ( FT NGVD) 4890.00 SITE SHIPROCK TOP OF CASING (FT) 4890.00 WELL NUMBER 0602 MEAS. PT. ELEV. (FT) 4890.00 SLOT SIZE (IN) 0.125 WELL INSTALLATION INTERVAL (FT) DRILLING METHOD BLANK CASING: 1.25 in. Stainless Steel 0.0 to 0.35 METHOD WELL SCREEN: 1.25 in. Stainless Steel 0.35 to 3.27 DATE DEVELOPED SUMPIEND CAP: 1.25 in. Stainless Steel 3.27 to 3.58

215

location privacy based on trusted computing and secure logging  

E-Print Network (OSTI)

Many operators of cellphone networks now offer locationbased services to their customers, whereby an operator often outsources service provisioning to a third-party provider. Since a persons location could reveal sensitive information about the person, the operator must ensure that the service provider processes location information about the operators customers in a privacy-preserving way. So far, this assurance has been based on a legal contract between the operator and the provider. However, there has been no technical mechanism that lets the operator verify whether the provider adheres to the privacy policy outlined in the contract. We propose an architecture for location-based services based on Trusted Computing and Secure Logging that provides such a technical mechanism. Trusted Computing lets an operator query the configuration of a location-based service. The operator will hand over location information to the service only if the service is configured such that the service provider cannot get access to location information using software-based attacks. This includes passive attacks, where the provider monitors information flowing into and out of its service, and active attacks, where the provider modifies or injects customer queries to the service. We introduce several requirements that must be satisfied by a location-based service to defend against passive attacks. Furthermore, we present Secure Logging, an auditing mechanism to defend against active attacks.

Urs Hengartner

2008-01-01T23:59:59.000Z

216

Regional well-log correlation in the New Mexico portion of the Delaware Basin  

SciTech Connect

Although well logs provide the most complete record of stratigraphy and structure in the northern Delaware Basin, regional interpretations of these logs generate problems of ambiguous lithologic signatures and on-hole anomalies. Interpretation must therefore be based on log-to-log correlation rather than on inferences from single logs. In this report, logs from 276 wells were used to make stratigraphic picks of Ochoan horizons (the Rustler, Salado, and Castile Formations) in the New Mexico portion of the Delaware Basin. Current log correlation suggests that: (1) the Castile is characterized by lateral thickening and thinning; (2) some Castile thinnings are of Permian age; (3) irregular topography in the Guadalupian Bell Canyon Formation may produce apparent structures in the overlying Ochoan units; and (4) extensive dissolution of the Salado is not apparent in the area of the Waste Isolation Pilot Project (WIPP) site. 13 refs., 37 figs.

Borns, D.J.; Shaffer, S.E.

1985-09-01T23:59:59.000Z

217

Filtering log data: finding the needles in the haystack  

SciTech Connect

Log data is an incredible asset for troubleshooting in large-scale systems. Nevertheless, due to the ever-growing system scale, the volume of such data becomes overwhelming, bringing enormous burdens on both data storage and data analysis. To address this problem, we present a 2-dimensional online filtering mechanism to remove redundant and noisy data via feature selection and instance selection. The objective of this work is two-fold: (i) to significantly reduce data volume without losing important information, and (ii) to effectively promote data analysis. We evaluate this new filtering mechanism by means of real environmental data from the production supercomputers at Oak Ridge National Laboratory and Sandia National Laboratory. Our preliminary results demonstrate that our method can reduce more than 85% disk space, thereby significantly reducing analysis time. Moreover, it also facilitates better failure prediction and diagnosis by more than 20%, as compared to the conventional predictive approach relying on RAS (Reliability, Availability, and Serviceability) events alone.

Yu, Li [Illinois Institute of Technology; Zheng, Ziming [Illinois Institute of Technology; Lan, Zhiling [Illinois Institute of Technology; Jones, Terry R [ORNL; Brandt, Jim [Sandia National Laboratories (SNL); Gentile, Ann [Sandia National Laboratories (SNL)

2012-01-01T23:59:59.000Z

218

Log-based Longitudinal Study Finds Window Thrashing  

E-Print Network (OSTI)

Although large displays are becoming more cost effective, most user interfaces are optimized for a single monitor of modest size even though many traditional workspaces such as desks and workbenches are much larger and some studies have found benefits from large displays. This paper explores whether a single monitor is sufficient for information work using standard software. A log-based longitudinal field study finds that most of the time a single monitor allows skilled information analysts to have a reasonable pattern of window activity. However, a novel visualization of the data shows that windows typically fill the monitor and the pattern is occasionally interrupted by window thrashing, the rapid manipulation of windows caused by limited display resource. Given these findings, we identify some common tasks that justify the development and the expense of wideband visual interfaces that are optimized for larger displays.

Jock Mackinlay And

2004-01-01T23:59:59.000Z

219

Examination of insulation wear modes in geothermal logging cables  

DOE Green Energy (OSTI)

The wear mode of the Tetrafluorethylene (TFE) insulation used on an electrical logging cable is described. The cable examined in this study was used repeatedly in various harsh geothermal environments. Considering the amount of abuse the cable was subjected to, the TFE performed very well. Grooves were formed on the outside of the insulation as a result of the fluid pressure and the loading from the inner layer of metal armor. Also, indentations on the inside of the insulation were caused by the insulation molding to the conductor strands. If this mode of wear were to continue, the conductors would eventually protrude from the insulation and short out against each other or the cable armor. 4 refs., 5 figs.

Grant, T.

1985-01-01T23:59:59.000Z

220

Monte Carlo Simulations of Neutron Oil well Logging Tools  

E-Print Network (OSTI)

Monte Carlo simulations of simple neutron oil well logging tools into typical geological formations are presented.The simulated tools consist of both 14 MeV pulsed and continuous Am-Be neutron sources with time gated and continuous gamma ray detectors respectively.The geological formation consists of pure limestone with 15% absolute porosity in a wide range of oil saturation.The particle transport was performed with the Monte Carlo N-Particle Transport Code System, MCNP-4B.Several gamma ray spectra were obtained at the detector position that allow to perform composition analysis of the formation.In particular, the ratio C/O was analyzed as an indicator of oil saturation.Further calculations are proposed to simulate actual detector responses in order to contribute to understand the relation between the detector response with the formation composition

Azcurra, M

2002-01-01T23:59:59.000Z

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


221

Application of oil-field well log interpretation techniques to the Cerro Prieto Geothermal Field  

DOE Green Energy (OSTI)

An example is presented of the application of oil-field techniques to the Cerro Prieto Field, Mexico. The lithology in this field (sand-shale lithology) is relatively similar to oil-field systems. The study was undertaken as a part of the first series of case studies supported by the Geothermal Log Interpretation Program (GLIP) of the US Department of Energy. The suites of logs for individual wells were far from complete. This was partly because of adverse borehole conditions but mostly because of unavailability of high-temperature tools. The most complete set of logs was a combination of Dual Induction Laterolog, Compensated Formation Density Gamma Ray, Compensated Neutron Log, and Saraband. Temperature data about the wells were sketchy, and the logs had been run under pre-cooled mud condition. A system of interpretation consisting of a combination of graphic and numerical studies was used to study the logs. From graphical studies, evidence of hydrothermal alteration may be established from the trend analysis of SP (self potential) and ILD (deep induction log). Furthermore, the cross plot techniques using data from density and neutron logs may help in establishing compaction as well as rock density profile with depth. In the numerical method, R/sub wa/ values from three different resistivity logs were computed and brought into agreement. From this approach, values of formation temperature and mud filtrate resistivity effective at the time of logging were established.

Ershaghi, I.; Phillips, L.B.; Dougherty, E.L.; Handy, L.L.

1979-10-01T23:59:59.000Z

222

3D Extended Logging for Geothermal Resources: Field Trials with the Geo-Bilt System  

DOE Green Energy (OSTI)

Geo-BILT (Geothermal Borehole Induction Logging Tool) is an extended induction logging tool designed for 3D resistivity imaging around a single borehole. The tool was developed for deployment in high temperature geothermal wells under a joint program funded by the California Energy Commission, Electromagnetic Instruments (EMI) and the U.S. Department of Energy. EM1 was responsible for tool design and manufacture, and numerical modeling efforts were being addressed at Lawrence Livermore Laboratory (LLNL) and other contractors. The field deployment was done by EM1 and LLNL. The tool operates at frequencies from 2 to 42 kHz, and its design features a series of three-component magnetic sensors offset at 2 and 5 meters from a three-component magnetic source. The combined package makes it possible to do 3D resistivity imaging, deep into the formation, from a single well. The manufacture and testing of the tool was completed in spring of 2001, and the initial deployment of Geo-BILT occurred in May 2001 at the Lost Hills oil field in southern California at leases operated by Chevron USA. This site was chosen for the initial field test because of the favorable geological conditions and the availability of a number of wells suitable for tool deployment. The second deployment occurred in April 2002 at the Dixie Valley geothermal field, operated by Caithness Power LLC, in central Nevada. This constituted the first test in a high temperature environment. The Chevron site features a fiberglass-cased observation well in the vicinity of a water injector. The injected water, which is used for pressure maintenance and for secondary sweep of the heavy oil formation, has a much lower resistivity than the oil bearing formation. This, in addition to the non-uniform flow of this water, creates a 3D resistivity structure, which is analogous to conditions produced from flowing fractures adjacent to geothermal boreholes. Therefore, it is an excellent site for testing the 3D capability of the tool in a low risk environment. The Dixie Valley site offered an environment where the tool could locate near-well fractures associated with steam development. The Lost Hills field measurements yielded a data set suitable for 3D imaging. The Geo-BLT data corresponded to existing conventional logging data and showed clear indications, in several depth intervals, of near-well 3D structure. Subsequent 3D inversion of these data produced a model consistent with non-planar water flow in specific layers. The Dixie Valley measurements identified structures associated with dike intrusions and water inflow at particular depths. Preliminary analysis suggests these structures are steeply dipping, which is consistent with the geology.

Mallan, R; Wilt, M; Kirkendall, B; Kasameyer, P

2002-05-29T23:59:59.000Z

223

Petrographic correlations and mathematical analysis of log signatures for clay identification  

Science Conference Proceedings (OSTI)

This report presents the results of correlation of log signature with information on distribution of the types and volumes of clays in the sandstone pore spaces determined from detailed CT-scan, XRD, SEM and thin section analyses of core samples from three sandstone reservoirs. The log signatures are then analyzed to determine if suitable mathematical/statistical parameter(s) could be calculated from the logs for identification of types and volumes of clays in sandstone reservoirs.

Sharma, B.

1992-04-01T23:59:59.000Z

224

"Tier","PRIORITY","Total Tickets Logged","Tickets Closed","Currently...  

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

"SCR",,421,404,17 ,,0.9952494062,0.3819951338 "Total Issues Report - STRIPES",,,,"20120101 - 20120418" "Tier","PRIORITY","Total Tickets Logged","Tickets...

225

Pressure Temperature Log At Silver Peak Area (DOE GTP) | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Pressure Temperature Log At Silver Peak Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Pressure Temperature Log At Silver Peak Area (DOE GTP) Exploration Activity Details Location Silver Peak Area Exploration Technique Pressure Temperature Log Activity Date Usefulness not indicated DOE-funding Unknown References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Pressure_Temperature_Log_At_Silver_Peak_Area_(DOE_GTP)&oldid=511053" Categories: Exploration Activities

226

Density Log at Fish Lake Valley Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

Login | Sign Up Search Page Edit History Facebook icon Twitter icon Density Log at Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home...

227

E-print Network Web Log News: Research Communications for Scientists...  

Office of Scientific and Technical Information (OSTI)

Description This Web Log provides the latest information about changes to E-print Network - its content, features, and functionality - as well as news or information of interest...

228

Density Log at Silver Peak Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Silver Peak Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Density Log at Silver Peak Area (DOE GTP) Exploration Activity Details...

229

Acoustic Logs At The Needles Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

The Needles Area (DOE GTP) Exploration Activity Details Location The Needles Area Exploration Technique Acoustic Logs Activity Date Usefulness not indicated DOE-funding Unknown...

230

Gamma Log At Flint Geothermal Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Flint Geothermal Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Gamma Log At Flint Geothermal Area (DOE GTP) Exploration Activity...

231

Gamma Log At Silver Peak Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Silver Peak Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Gamma Log At Silver Peak Area (DOE GTP) Exploration Activity Details...

232

Density Log at Gabbs Valley Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Gabbs Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Density Log at Gabbs Valley Area (DOE GTP) Exploration Activity...

233

Landscape of the Past: The 1815 Log House at Western Kentucky University.  

E-Print Network (OSTI)

??The 1815 Log House is located on the campus of Western Kentucky University. Built in the early 1800's by Archibald Felts, the house was occupied (more)

Alewine, Elizabeth

2008-01-01T23:59:59.000Z

234

Fluid-Rock Characterization and Interactions in NMR Well Logging  

DOE Green Energy (OSTI)

The objective of this project is to characterize the fluid properties and fluid-rock interactions that are needed for formation evaluation by NMR well logging. This is the first annual progress report submitted to the DOE. It reports on the work completed during the reporting period even if it may have started before this period. This project is a partnership between Professor George J. Hirasaki at Rice University and Professor Kishore Mohanty at University of Houston. In addition to the DOE, this project is supported by a consortium of oil companies and service companies. The fluid properties characterization has emphasized the departure of live oils from correlations based on dead oils. Also, asphaltic components can result in a difference between the T1 and T2 relaxation time distributions as well as reduce the hydrogen index. The fluid rock characterizations that are reported here are the effects of wettability and internal magnetic field gradients. A pore reconstruction method ha s been developed to recreate three-dimensional porous media from two-dimensional images that reproduce some of their key statistical properties. A Monte Carlo simulation technique has been developed to calculate the magnetization decay in fluid saturated porous media given their pore structure.

Hirasaki, George J.; Mohanty, Kishore, K.

2001-07-13T23:59:59.000Z

235

Numerical Analysis Of Three Component Induction Logging In Geothermal Reservoirs  

DOE Green Energy (OSTI)

This project is supporting the development of the ''Geo-Bilt'', geothermal electromagnetic-induction logging tool that is being built by ElectroManetic Instruments, Inc. The tool consists of three mutually orthogonal magnetic field antennas, and three-component magnetic field receivers located at different distances from the source. In its current configuration, the source that has a moment aligned along the borehole axis consists of a 1m long solenoid, while the two trans-axial sources consist of 1m by 8cm loops of wire. The receivers are located 2m and 5m away from the center of the sources, and five frequencies from 2 kHz to 40 kHz are being employed. This study is numerically investigating (1) the effect of the borehole on the measurements, and (2) the sensitivity of the tool to fracture zone-geometries that might be encountered in a geothermal field. The benefits of the results are that they will lead to a better understanding of the data that the tool produces during its testing phase and an idea of what the limitations of the tool are.

Dr. David L. Alumbaugh

2002-01-09T23:59:59.000Z

236

CAPRI: a tool for mining complex line patterns in large log data  

Science Conference Proceedings (OSTI)

Log files provide important information for troubleshooting complex systems. However, the structure and contents of the log data and messages vary widely. For automated processing, it is necessary to first understand the layout and the structure of the ... Keywords: association rule, line, term, type-casting, value pattern mining

Farhana Zulkernine; Patrick Martin; Wendy Powley; Sima Soltani; Serge Mankovskii; Mark Addleman

2013-08-01T23:59:59.000Z

237

"I know what you did last summer": query logs and user privacy  

Science Conference Proceedings (OSTI)

We investigate the subtle cues to user identity that may be exploited in attacks on the privacy of users in web search query logs. We study the application of simple classifiers to map a sequence of queries into the gender, age, and location of the user ... Keywords: k-anonymity, privacy, query log analysis

Rosie Jones; Ravi Kumar; Bo Pang; Andrew Tomkins

2007-11-01T23:59:59.000Z

238

A new inversion method for (T2, D) 2D NMR logging and fluid typing  

Science Conference Proceedings (OSTI)

One-dimensional nuclear magnetic resonance (1D NMR) logging technology has some significant limitations in fluid typing. However, not only can two-dimensional nuclear magnetic resonance (2D NMR) provide some accurate porosity parameters, but it can also ... Keywords: Diffusion coefficient (D), Fluid typing, Transverse relaxation time (T2), Two-dimensional NMR (2D NMR) logging

Maojin Tan; Youlong Zou; Cancan Zhou

2013-02-01T23:59:59.000Z

239

Annual Logging Symposium, June 3-6, 2007 INTERPRETATION OF FREQUENCY-DEPENDENT DUAL-  

E-Print Network (OSTI)

METHOD Wei Yang, and Carlos Torres-Verdín, The University of Texas at Austin; Ridvan Akkurt, Saleh Al at the SPWLA 48th Annual Logging Symposium held in Austin, Texas, United States, June 3-6, 2007. ABSTRACT configuration of Halliburton Energy Services' Dual Laterolog Logging Tool (DLLT-BTM ) to reproduce measurements

Torres-Verdín, Carlos

240

Annual Logging Symposium, June 3-6, 2007 QUANTITATIVE STUDIES OF RELATIVE DIP ANGLE AND BED -  

E-Print Network (OSTI)

. Mendoza, and C. Torres-Verdín, The University of Texas at Austin; W.E. Preeg, Consultant, E. Stockhausen; Chevron Energy Technology Company Copyright 2007, held jointly by the Society of Petrophysicists and Well 48th Annual Logging Symposium held in Austin, Texas, June 3-6, 2007. ABSTRACT Logging While Drilling

Torres-Verdín, Carlos

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


241

Coherence-Centric Logging and Recovery for Home-Based Software Distributed Shared Memory  

E-Print Network (OSTI)

Coherence-Centric Logging and Recovery for Home-Based Software Distributed Shared Memory Angkul, called the coherence-centric logging (CCL) and re- covery protocol, for home-based SDSM. Our CCL mini access latency by overlapping disk accesses with coherence-induced com- munication existing in home-based

Tzeng, Nian-Feng

242

Small Log Conference Creating Capacity to Compete Coeur d'Alene, Idaho, USA, 1 April 2005  

E-Print Network (OSTI)

Small Log Conference ­ Creating Capacity to Compete Coeur d'Alene, Idaho, USA, 1 April 2005 F A O Conference ­ Creating Capacity to Compete Coeur d'Alene, Idaho, USA, 1 April 2005 F A O Contents I. Forest. Growing the market #12;Small Log Conference ­ Creating Capacity to Compete Coeur d'Alene, Idaho, USA, 1

243

Improving the performance of log-structured file systems with adaptive block rearrangement  

Science Conference Proceedings (OSTI)

Log-Structured File System (LFS) is famous for its optimization for write performance. Because of its append-only nature, garbage collection is needed to reclaim the space occupied by the obsolete data. The cleaning overhead could significantly decrease ... Keywords: data rearrangement, garbage collection, log-structured file system

Mei-Ling Chiang; Jia-Shin Huang

2007-03-01T23:59:59.000Z

244

A review of log-polar imaging for visual perception in robotics  

Science Conference Proceedings (OSTI)

Log-polar imaging consists of a type of methods that represent visual information with a space-variant resolution inspired by the visual system of mammals. It has been studied for about three decades and has surpassed conventional approaches in robotics ... Keywords: Active vision, Foveal imaging, Log-polar mapping, Real-time robotics

V. Javier Traver; Alexandre Bernardino

2010-04-01T23:59:59.000Z

245

Adaptive Fluid Electrical Conductivity Logging to Determine the Salinity Profiles in Groundwater  

E-Print Network (OSTI)

Adaptive Fluid Electrical Conductivity Logging to Determine the Salinity Profiles in Groundwater(t) Analysis Method · Integrate C(z,t), or FEC profile, over z of logged interval to get salinity mass per unit salinity TMDL requires wetland management of salt loads to the San Joaquin River · Dearth of groundwater

Quinn, Nigel

246

Annual Logging Symposium, June 16-20, 2012 SATURATION-HEIGHT AND INVASION CONSISTENT HYDRAULIC  

E-Print Network (OSTI)

neutron source, geochemical logs, B:153­155 caliper logs, vs. depth, A:88­91 carbon dioxide vs. crustal compensated neutron tool coercivity, basalts, B:149 compensated neutron tool, Site 843, B:153. carbon dioxide of basalts, B:144 crust, oceanic geochemistry, B:116 physical properties, B:161

Torres-Verdín, Carlos

247

Pressure Temperature Log At Mccoy Geothermal Area (DOE GTP) | Open Energy  

Open Energy Info (EERE)

Pressure Temperature Log At Mccoy Geothermal Area (DOE GTP) Pressure Temperature Log At Mccoy Geothermal Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Pressure Temperature Log At Mccoy Geothermal Area (DOE GTP) Exploration Activity Details Location Mccoy Geothermal Area Exploration Technique Pressure Temperature Log Activity Date Usefulness not indicated DOE-funding Unknown References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Pressure_Temperature_Log_At_Mccoy_Geothermal_Area_(DOE_GTP)&oldid=511052" Categories: Exploration Activities DOE Funded Activities ARRA Funded Activities What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load)

248

U-039: ISC Update: BIND 9 Resolver crashes after logging an error in  

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

9: ISC Update: BIND 9 Resolver crashes after logging an error 9: ISC Update: BIND 9 Resolver crashes after logging an error in query.c U-039: ISC Update: BIND 9 Resolver crashes after logging an error in query.c November 16, 2011 - 2:30pm Addthis PROBLEM: ISC Update: BIND 9 Resolver crashes after logging an error in query.c. PLATFORM: Versions of BIND, 9.4-ESV, 9.6-ESV, 9.7.x, 9.8.x ABSTRACT: A remote server can cause the target connected client to crash. Organizations across the Internet are reporting crashes interrupting service on BIND 9 nameservers performing recursive queries. Affected servers crash after logging an error in query.c with the following message: "INSIST(! dns_rdataset_isassociated(sigrdataset))" Multiple versions are reported as being affected, including all currently supported release versions of ISC BIND 9. ISC is actively investigating the root cause and

249

Acoustic Logs At Alum Area (Moos & Ronne, 2010) | Open Energy Information  

Open Energy Info (EERE)

Acoustic Logs At Alum Geothermal Area (Moos & Ronne, Acoustic Logs At Alum Geothermal Area (Moos & Ronne, 2010) Exploration Activity Details Location Alum Geothermal Area Exploration Technique Acoustic Logs Activity Date Usefulness useful DOE-funding Unknown Notes The results revealed that acoustic images are superior to electrical images to detect structurally important natural fractures and stress-induced wellbore breakouts and tensile wall fractures, and were adequate to detect stratigraphic features. References Daniel Moos, Joel Ronne (2010) Selecting The Optimal Logging Suite For Geothermal Reservoir Evaluation- Results From The Alum 25-29 Well, Nevada Retrieved from "http://en.openei.org/w/index.php?title=Acoustic_Logs_At_Alum_Area_(Moos_%26_Ronne,_2010)&oldid=510215" Categories: Exploration Activities

250

Pressure Temperature Log At Vale Hot Springs Area (Combs, Et Al., 1999) |  

Open Energy Info (EERE)

Vale Hot Springs Area (Combs, Et Al., 1999) Vale Hot Springs Area (Combs, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Pressure Temperature Log At Vale Hot Springs Area (Combs, Et Al., 1999) Exploration Activity Details Location Vale Hot Springs Area Exploration Technique Pressure Temperature Log Activity Date Usefulness not indicated DOE-funding Unknown Notes Numerous temperature logs were taken with Sandia's platinum-resistance-thermometer (PRT) tool which along with a Sandia logging truck remained on-site for the entire project. Static temperature logs (no flow in hole) were done with this tool when coring operations were suspended for bit trips, rig maintenance, or other time intervals that would permit the hole to warm up near its static temperature K580gradient.

251

Geophysical logging case history of the Raft River geothermal system, Idaho  

Open Energy Info (EERE)

Geophysical logging case history of the Raft River geothermal system, Idaho Geophysical logging case history of the Raft River geothermal system, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Geophysical logging case history of the Raft River geothermal system, Idaho Details Activities (1) Areas (1) Regions (0) Abstract: Drilling to evaluate the geothermal resource in the Raft River Valley began in 1974 and resulted in the discovery of a geothermal reservoir at a depth of approximately 1523 m (500 ft). Several organizations and companies have been involved in the geophysical logging program. There is no comprehensive report on the geophysical logging, nor has there been a complete interpretation. The objectives of this study are to make an integrated interpretation of the available data and compile a case history. Emphasis has been on developing a simple interpretation

252

Bounds and Approximations for Sums of Dependent Log-Elliptical Random Variables  

E-Print Network (OSTI)

Dhaene, Denuit, Goovaerts, Kaas & Vyncke (2002a,b) have studied convex bounds for a sum of dependent random variables and applied these to sums of log-normal random variables. In particular, they have shown how these convex bounds can be used to derive closed-form approximations for several of the risk measures of such a sum. In this paper we investigate to which extent their general results on convex bounds can also be applied to sums of log-elliptical random variables which incorporate sums of log-normals as a special case. Firstly, we show that unlike the log-normal case, for general sums of log-ellipticals the convex lower bound does no longer result in closed form approximations for the different risk measures. Secondly, we demonstrate how instead the weaker stop-loss order can be used to derive such closed form approximations. We also present numerical examples to show the accuracy of the proposed approximations.

unknown authors

2008-01-01T23:59:59.000Z

253

Cross-Dipole Acoustic Log At Alum Area (Moos & Ronne, 2010) | Open Energy  

Open Energy Info (EERE)

Dipole Acoustic Log At Alum Area (Moos & Ronne, 2010) Dipole Acoustic Log At Alum Area (Moos & Ronne, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Cross-Dipole Acoustic Log At Alum Geothermal Area (Moos & Ronne, 2010) Exploration Activity Details Location Alum Geothermal Area Exploration Technique Cross-Dipole Acoustic Log Activity Date Usefulness useful DOE-funding Unknown Notes A crossed-dipole acoustic log detected stress induced anisotropy in the sediments, and also appeared to be able to identify and orient steeply dipping, compliant and therefore possibly conductive fractures in basement rocks. Because the shear-wave velocity was extremely low throughout most of the sedimentary section dipole data was required for its determination. The analysis results, which included a stress determination based on an

254

Well Log Techniques At Snake River Plain Region (DOE GTP) | Open Energy  

Open Energy Info (EERE)

Well Log Techniques At Snake River Plain Region (DOE GTP) Well Log Techniques At Snake River Plain Region (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Well Log Techniques At Snake River Plain Region (DOE GTP) Exploration Activity Details Location Snake River Plain Geothermal Region Exploration Technique Well Log Techniques Activity Date Usefulness not indicated DOE-funding Unknown References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Well_Log_Techniques_At_Snake_River_Plain_Region_(DOE_GTP)&oldid=600470" Categories: Exploration Activities DOE Funded Activities ARRA Funded Activities What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load)

255

U-038: BIND 9 Resolver crashes after logging an error in query.c |  

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

8: BIND 9 Resolver crashes after logging an error in query.c 8: BIND 9 Resolver crashes after logging an error in query.c U-038: BIND 9 Resolver crashes after logging an error in query.c November 16, 2011 - 8:37am Addthis PROBLEM: BIND 9 Resolver crashes after logging an error in query.c. PLATFORM: Multiple version of BIND 9. Specific versions under investigation ABSTRACT: A remote server can cause the target connected client to crash. Organizations across the Internet are reporting crashes interrupting service on BIND 9 nameservers performing recursive queries. Affected servers crash after logging an error in query.c with the following message: "INSIST(! dns_rdataset_isassociated(sigrdataset))" Multiple versions are reported as being affected, including all currently supported release versions of ISC BIND 9. ISC is actively investigating the root cause and

256

Baseline neutron logging measurements in the drift scale test  

Science Conference Proceedings (OSTI)

The Drift Scale Test (DST) is one of the thermal tests being conducted in the Exploratory Studies Facility (ESF). One of the objectives of the DST is to study the coupled thermal-mechanical- hydrological-chemical (TMHC) processes in the ESF at the repository horizon of the potential high-level nuclear waste repository in Yucca Mountain, Nevada. The objectives, the test design, and the test layouts of the DST are included in the test design report by CRWMS M&O Contractor LLNL. The configuration of the DST includes a declining Observation Drift driven mostly east and downward from main tunnel in the ESF, at about 2.827 km from the North portal. The downward slope of the Observation Drift (11.5 to 14.0 percent) ensures a minimum 10 m of middle nonlithophysal Topopah Spring Tuff as the overburden for the DST. The length of the Observation Drift is about 136 m. At the elevation of the DST crown (nominally 10 m below the upper extent of the middle nonlithophysal Topopah Spring Tuff) the Connecting Drift breaks out to the north from the Observation Drift, 136 m from the main tunnel of the ESF. The Connecting Drift extends approximately 40 m to the north from the Observation Drift. A Heater Drift breaks out westward from the Connecting Drift at about 30 m from the Observation Drift. The Heater Drift consists of an 11 m long entry, which includes a plate- loading niche, and a 47 m long heated drift. The nominal diameter of the drifts is 5 m. The detail configuration of the DST, including diagrams showing the drift and borehole layout, is included in the test design report by CRWMS M&O Contractor LLNL. Thermal neutron logging is a method used to determine moisture content in rocks and soils and will be used to monitor moisture content in boreholes ESF-HD-NEU-1 to ESF-HD-NEU-10 (Boreholes 47 to 51 and 64 to 68), ESF-HD-TEMP-1 (Borehole 79), and ESF-HD-TEMP-2 (Borehole 80) in the DST. The neutron probe contains a source of high energy neutrons and a detector for slow (thermal) neutrons. Water present in rocks slows down the neutrons making them detectable (because of the presence of hydrogen).

Lin, W.; Carlson, R.; Neubaurer, D.

1998-01-01T23:59:59.000Z

257

Development and anlysis of fast, approximate 3D Algorithms for interpretation of multi-component induction logging data  

DOE Green Energy (OSTI)

This report addresses the effects of electrical anisotropy on the 3D inversion of single-well induction logging data when anisotropy is not considered. Of concern are possible artifacts that may lead to an incorrect interpretation of the formation about the borehole. Comparison is made of 3D isotropic inversion on a suite of model data, with and without anisotropy, consisting of an infinite layer and layer terminated at the borehole. In both cases, the layer dip (or well deviation) is varied. Inversion of the anisotropic data result in an overestimate of the layer conductivity, and the lateral extent of the layer about the borehole.

David L. Alumbaugh

2006-07-03T23:59:59.000Z

258

Temperature logging as an aid to understanding groundwater flow in boreholes  

SciTech Connect

Borehole temperatures are affected by a range of physical phenomena, including drilling and engineering procedures, thermal resistivity of the rock, surface climatic changes, local heat sources and sinks, free convection of the borehole fluid, and water flows inside the borehole. As a result, temperature logs provide unique information not available from other logs. On the other hand, because the temperature log is sensitive to a variety of phenomena, one or more of these may obscure the effect being studied. In the case where groundwater is entering the borehole at one depth and exiting at another depth (or at the surface) the temperature disturbance resulting from this flow is likely to be a prominent feature of the temperature profile of the borehole. Because of this, water flows in boreholes are often a source of noise in temperature logs, obscuring the features of interest. Recently, however, unusual groundwater behavior was noted in several boreholes at the Nevada Test Site (NTS), and temperature logs were run as part of a program to study this phenomenon. In this case the groundwater flow has been the feature of interest in the logs, and the logs have been useful as an aid in understanding the water flow in those boreholes.

Conaway, J.G.

1987-01-01T23:59:59.000Z

259

Density logging and density of rocks in Rainier Mesa Area, Nevada Test Site  

SciTech Connect

Density logs from all 35 vertical drill holes in the Rainier Mesa area in which logs were obtained were evaluated and the distribution of densities of units in the geologic section was derived. Densities were obtained in only 10 holes in which calibrated logging tools had been run. The logs from an additional 10 holes were calibrated with core. Densities vary from nearly 1 g/cc in tunnel bed 5 to over 2.8 g/cc in the dolomitic rocks. Log densities were found to agree well with core data in those subunits (chiefly within tunnel beds 3 and 4) where an adequate number of core measurements were available for comparison. Lithologic correlations based on density log signatures were found to extend for more than 8 km in several units and subunits in the area. Although the volcanic rocks in the Rainier Mesa area are comprised of a wider spectrum of minerals than the petroliferous rocks generally involved in most commercial logging applications, grain density may be estimated with good accuracy with only a knowledge of glass and zeolite content. The variability of the Z/A ratio of the matrix in these volcanic rocks is also negligible compared to the value of 0.5 generally assumed in density logging. However, due to the assumptions made concerning the Z/A of water in deriving the output of commercial density tools, one should be aware of the errors inherent in assuming that recorded log densities are true densities. These errors are normally small, being less than 3 percent for compensated limestone'' tools and 2 percent for tools which output electron density. 35 refs., 25 figs., 12 tabs.

Carroll, R.D.

1989-01-01T23:59:59.000Z

260

Coal log pipeline research at the University of Missouri. 1st Quarterly report for 1995, January 1, 1995--March 31, 1995  

SciTech Connect

Work continued on the study of coal log pipeline research. Individual projects described include fast compaction of coal logs; effect of cooling on coal log quality; coal log capping; effectiveness of adding fiber to enhance coal log quality; fabrication using hydrophobic binders; cost estimation of different lubricants; automatic control of coal log pipeline system; CLP design; coal log train transport; economics of coal log pipeline; legal aspects; heating, cooling, and drying of logs; vacuum systems to enhance production; design; and effect of piston modification on capping.

Liu, H.

1995-08-01T23:59:59.000Z

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


261

Search Log Analysis of the ARTstor Cultural Heritage Image Database  

E-Print Network (OSTI)

Dupret. 2005. Modeling User Search Behavior. In Proceedings2002. A taxonomy of web search. SIGIR Forum 36, no. 2: 3-10.Image searching on the Excite Web search engine. Information

Lowe, Heather Ann

2013-01-01T23:59:59.000Z

262

Nonprofit Organizations: Have Your Los Alamos Employees/Retirees Log Hours  

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

Nonprofit Organizations: Have Your Los Alamos Employees/Retirees Log Nonprofit Organizations: Have Your Los Alamos Employees/Retirees Log Hours in VolunteerMatch Community Connections: Our link to Northern New Mexico Communities Latest Issue:Dec. 2013 - Jan. 2014 All Issues » submit Nonprofit Organizations: Have Your Los Alamos Employees/Retirees Log Hours in VolunteerMatch Lab employees and retirees should log their VolunteerMatch hours to benefit local nonprofits. March 1, 2013 Volunteers help fill sandbags during flood season Volunteers help in many different roles including in healthcare. Contacts Editor Linda Anderman Email Community Programs Office Kurt Steinhaus Email So far, employees and retirees have volunteered more than 1.2 million volunteer hours. If you are a nonprofit organization that has Lab employees or retirees as

263

Neutron Log At Fort Bliss Area (Combs, Et Al., 1999) | Open Energy  

Open Energy Info (EERE)

Area (Combs, Et Al., 1999) Area (Combs, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Neutron Log At Fort Bliss Area (Combs, Et Al., 1999) Exploration Activity Details Location Fort Bliss Area Exploration Technique Neutron Log Activity Date Usefulness not indicated DOE-funding Unknown Notes Three principal types of data were obtained from this drilling project: core samples of the lithology penetrated by the holes, records of drilling behavior (such as water level in the hole, changes in rate of penetration etc.), and multiple temperature logs (both during and after drilling) in each well. A suite of geophysical logs (gamma ray, neutron, sonic, and resistivity) was also run after completion of drilling. References Jim Combs, John T. Finger, Colin Goranson, Charles E. Hockox Jr.,

264

LOG-IN Africa local governance and ICTs research network for Africa  

Science Conference Proceedings (OSTI)

LOG-IN Africa is an emergent pan-African network of researchers and research institutions from nine countries (Egypt, Ethiopia, Kenya, Mauritius, Morocco, Mozambique, Senegal, South Africa, and Uganda). It will assess the current state and outcomes of ...

Gianluca Misuraca

2006-05-01T23:59:59.000Z

265

NERC corporate Planet Earth online Grants Studentships Science benefits Research papers Contact us | Log in  

E-Print Network (OSTI)

cooling schemes Atomic bombs date fake drams MOST POPULAR NEWS 1. Atomic bombs date fake drams 2 | Log in SEARCH Search term(s) HOME LATEST NEWS FEATURES & SPECIAL REPORTS MULTIMEDIA BLOGS

Cambridge, University of

266

Poster for the paper "A Log Service Package for the ATLAS TDAQ/DCS Group"  

E-Print Network (OSTI)

This is the poster for the paper "A new design and implementation of the ATLAS Log Service package", which has been accepted in the International Conference on Computing in High Energy and Nuclear Physics (CHEP) 2010.

Murillo Garca, R; The ATLAS collaboration

2010-01-01T23:59:59.000Z

267

Acoustic Logs At Newberry Caldera Area (Combs, Et Al., 1999) | Open Energy  

Open Energy Info (EERE)

Acoustic Logs At Newberry Caldera Area (Combs, Et Al., 1999) Acoustic Logs At Newberry Caldera Area (Combs, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Acoustic Logs At Newberry Caldera Area (Combs, Et Al., 1999) Exploration Activity Details Location Newberry Caldera Area Exploration Technique Acoustic Logs Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes The acoustic borehole televiewer (BHTV) was run twice in the wellbore with limited success. There were several problems with the tool's fimctions, but images were successfully obtained over the interval from 2748' to 3635'. References Jim Combs, John T. Finger, Colin Goranson, Charles E. Hockox Jr., Ronald D. Jacobsen, Gene Polik (1999) Slimhole Handbook- Procedures And Recommendations For Slimhole Drilling And Testing In Geothermal Exploration

268

Technical memorandum on analysis of the EU ETS using the community independent transaction log  

E-Print Network (OSTI)

This memorandum provides an overview of three deficiencies within the current presentation of the Community Independent Transaction Log (CITL) data that have implications for researchers' ability to accurately analyze the ...

McGuinness, Meghan

2007-01-01T23:59:59.000Z

269

Precise inversion of logged slownesses for elastic parameters in a gas shale formation  

E-Print Network (OSTI)

Dipole sonic log data recorded in a vertical pilot well and the associated production well are analyzed over a 2001100-ft section of a North American gas shale formation. The combination of these two wells enables angular ...

Miller, Douglas E.

270

Lithology and hydrothermal alteration determination from well logs for the Cerro Prieto Wells, Mexico  

DOE Green Energy (OSTI)

The purpose of this study is to examine the characteristics of geophysical well logs against the sand-shale series of the sedimentary column of the Cerro Prieto Geothermal Field, Mexico. The study shows that the changes in mineralogy of the rocks because of hydrothermal alteration are not easily detectable on the existing logs. However, if the behavior of clay minerals alone is monitored, the onset of the hydrothermally altered zones may be estimated from the well logs. The effective concentration of clay-exchange cations, Q/sub v/, is computed using the data available from conventional well logs. Zones indicating the disappearance of low-temperature clays are considered hydrothermally altered formations with moderate to high-permeability and temperature, and suitable for completion purposes.

Ershaghi, I.; Ghaemian, S.; Abdassah, D.

1981-10-01T23:59:59.000Z

271

COMPARISON OF ACOUSTIC AND ELECTRICAL IMAGE LOGS FROM THE COSO GEOTHERMAL  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » COMPARISON OF ACOUSTIC AND ELECTRICAL IMAGE LOGS FROM THE COSO GEOTHERMAL FIELD, CA Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: COMPARISON OF ACOUSTIC AND ELECTRICAL IMAGE LOGS FROM THE COSO GEOTHERMAL FIELD, CA Details Activities (1) Areas (1) Regions (0) Abstract: Electrical and acoustic image logs collected from well 58A-10 in crystalline rock on the eastern margin of the Coso Geothermal Field, CA, reveal different populations of planar structures intersecting the borehole. Electrical image logs appear to be sensitive to variations in

272

ITTF-016 Website Development-Maintenance Log 09_0909 EOTA - Business Form  

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

6 Website Development-Maintenance Log 09_0909 6 Website Development-Maintenance Log 09_0909 EOTA - Business Form Document Title: ITTP-015 Web Site Development / Maintenance Document Number: Website Development and Maintenance log ITT Melissa Otero N/A Referenced Documents: Parent Document: ITTF-016 Rev. 11_0419 Approvers: Melissa Otero Document Owner: Ben Aragon Backup Owner: Notify of Changes: A B 08_0818 Revision History: Rev. Description of Change Intitial Release. Added headings to address to include: Performance Requirements, Statutory and Regulatory Requirements, Information from Previous Similar Designs, and Other Requirements. Added additional column to indicate "Estimated Completion Date" of WSD projects. "Design Verification Complete" and "Design Validation Complete" columns removed from log.

273

Gamma Log At Raft River Geothermal Area (1979) | Open Energy Information  

Open Energy Info (EERE)

Gamma Log At Raft River Geothermal Area (1979) Gamma Log At Raft River Geothermal Area (1979) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Gamma Log At Raft River Geothermal Area (1979) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Gamma Log Activity Date 1979 Usefulness useful DOE-funding Unknown Exploration Basis To allow for the lateral and vertical extrapolation of core and test data and bridged the gap between surface geophysical data and core analyses. Notes Borehole gamma spectrometry can be used to identify anomalous concentration of uranium, thorium, and potassium which are probably due to transportation by hydrothermal solutions. Computer crossplotting was used as an aid to the identification of such rock types as quartzite, quartz monzonite, and

274

Gamma Log At Fort Bliss Area (Combs, Et Al., 1999) | Open Energy  

Open Energy Info (EERE)

Fort Bliss Area (Combs, Et Al., 1999) Fort Bliss Area (Combs, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Gamma Log At Fort Bliss Area (Combs, Et Al., 1999) Exploration Activity Details Location Fort Bliss Area Exploration Technique Gamma Log Activity Date Usefulness not indicated DOE-funding Unknown Notes Three principal types of data were obtained from this drilling project: core samples of the lithology penetrated by the holes, records of drilling behavior (such as water level in the hole, changes in rate of penetration etc.), and multiple temperature logs (both during and after drilling) in each well. A suite of geophysical logs (gamma ray, neutron, sonic, and resistivity) was also run after completion of drilling. References Jim Combs, John T. Finger, Colin Goranson, Charles E. Hockox Jr.,

275

Multipole logging in a formation with stress-relief-induced anisotropy  

SciTech Connect

The stress relief associated with the drilling of a borehole may induce a mechanically damaged zone with radial transverse isotropy (RTI), where the properties in the radial direction differ from those in the axial and tangential directions. The effect of such a zone on multipole acoustic full-waveform logging is investigated using a numerical model based on the frequency-axial-wavenumber method. Calculations of the spectral behavior show that the fundamental mode associated with the multipole source behaves the same way in a TRI zone as it does in a damaged zone with isotropic properties. In a slow virgin formation, calculations of full waveforms show that the presence of a damaged zone with RTI is more difficult to detect than a damaged zone with isotropic elasticity because the refracted P-wave encounters an isotropic zone but not a RTI zone. The results indicate that a damaged zone with RTI, which is a precursor to destructive events such as borehole instability and sand production, can be detected only by analyzing the spectral behavior of the fundamental mode.

Renlie, L. (IKU Petroleum Research, Trondheim (Norway))

1994-12-01T23:59:59.000Z

276

Geological structures from televiewer logs of GT-2, Fenton Hill, New Mexico: Part 1, Feature extraction  

DOE Green Energy (OSTI)

Patterns in reflected sonic intensity recognized during examination of televiewer logs of basement gneiss at the Hot Dry Rock Site, Fenton Hill, New Mexico, are due to geological fractures and foliations and to incipient breakouts. These features are obscured by artifacts caused by wellbore ellipticity, tool off-centering, and tool oscillations. An interactive method, developed for extraction of the structural features (fractures and foliations), uses human perception as a pattern detector and a chi-square test of harmonic form as a pattern discriminator. From imagery of GT-2, 733 structures were recovered. The acceptance rate of the discriminator was 54%. Despite these positive results, the general conclusion of this study is that intensity-mode imagery from Fenton Hill is not directly invertible for geological information because of the complexity of the televiewer imaging process. Developing a forward model of the intensity-imaging process, or converting to caliper-mode imagery, or doing both, will be necessary for high-fidelity feature extraction from televiewer data.

Burns, K.L.

1987-07-01T23:59:59.000Z

277

Study of well logs from Cove Fort-Sulphurdale KGRA, Millard and Beaver Counties, Utah  

DOE Green Energy (OSTI)

Union Oil Company drilled four geothermal test wells in the Cove Fort-Sulphurdale KGRA between 1975 and 1979. A fairly complete suite of well logs were recorded for the three deeper holes, and these data are presented as composite well log plots in this report. The composite well log plots have facilitated the interpretation of limestone, dolomite, sandstone, quartz-monzonite, serpentine, and volcanic lithologies and the identification of numerous fractures. This has been especially helpful because of the extensive lost circulaton zones and poor cuttings recovery. Intraformational flow was identified by a fluid migration-temperature tracer log at depth in CFSU 31-33. Well log crossplots were computed to assist in lithologic identification and the determination of physical properties for specific depth intervals in a given hole. The presence of hydrous minerals sometimes results in neutron porosity somewhat higher than the true nonfracture porosity, which is generally less than 4%. Permeability is clearly controlled by fractures. A maximum well temperature of 178.9/sup 0/C, low flow rates and low probable percent flash indicate these wells are subeconomic for electric generation at present. The well log study has substantially improved our understanding of the reservoir as presently drilled.

Glenn, W.E.; Ross, H.P.

1982-07-01T23:59:59.000Z

278

Results of investigations at the Zunil geothermal field, Guatemala: Well logging and brine geochemistry  

DOE Green Energy (OSTI)

The well logging team from Los Alamos and its counterpart from Central America were tasked to investigate the condition of four producing geothermal wells in the Zunil Geothermal Field. The information obtained would be used to help evaluate the Zunil geothermal reservoir in terms of possible additional drilling and future power plant design. The field activities focused on downhole measurements in four production wells (ZCQ-3, ZCQ-4, ZCQ-5, and ZCQ-6). The teams took measurements of the wells in both static (shut-in) and flowing conditions, using the high-temperature well logging tools developed at Los Alamos National Laboratory. Two well logging missions were conducted in the Zunil field. In October 1988 measurements were made in well ZCQ-3, ZCQ-5, and ZCQ-6. In December 1989 the second field operation logged ZCQ-4 and repeated logs in ZCQ-3. Both field operations included not only well logging but the collecting of numerous fluid samples from both thermal and nonthermal waters. 18 refs., 22 figs., 7 tabs.

Adams, A.; Dennis, B.; Van Eeckhout, E.; Goff, F.; Lawton, R.; Trujillo, P.E.; Counce, D.; Archuleta, J. (Los Alamos National Lab., NM (USA)); Medina, V. (Instituto Nacional de Electrificacion, Guatemala City (Guatemala). Unidad de Desarollo Geotermico)

1991-07-01T23:59:59.000Z

279

In-home demonstration of the reduction of woodstove emissions from the use of densified logs  

DOE Green Energy (OSTI)

There is a need to reduce emissions from conventional wood stoves in the short-term while stove replacement takes place over the longer term. One possible is to use fuels that would burn cleaner than cordwood. Densified fuels have been commercially available for years and offer such a possibility. The objective of this project was to evaluate the emissions and efficiency performance of two commercially available densified log types in homes and compare their performance with cordwood. Researchers measured particulate matter (PM), carbon monoxide (CO), and volatile organic matter (VOC) emissions. Both total VOC and methane values are presented. Each home used an Automated Woodstove Emissions Sampler system, developed for the EPA and Bonneville Power Administration, in a series of four week-long tests for each stove. The sequence of tests in each stove was cordwood, Pres-to-Logs, Eco-Logs, and a second, confirming test using Pres-to-Logs. Results show an average reduction of 52% in PM grams per hour emissions overall for the nine stoves using Pres-to-Logs. All nine stoves displayed a reduction in PM emissions. CO emissions were more modestly reduced by 27%, and VOCs were reduced 39%. The emissions reduction percentage was similar for both types of stoves.

Barnett, S.G.; Bighouse, R.D.

1992-07-07T23:59:59.000Z

280

In-Home Demonstration of the Reduction of Woodstove Emissions from the Use of Densified Logs.  

DOE Green Energy (OSTI)

There is a need to reduce emissions from conventional wood stoves in the short-term while stove replacement takes place over the longer term. One possible is to use fuels that would burn cleaner than cordwood. Densified fuels have been commercially available for years and offer such a possibility. The objective of this project was to evaluate the emissions and efficiency performance of two commercially available densified log types in homes and compare their performance with cordwood. Researchers measured particulate matter (PM), carbon monoxide (CO), and volatile organic matter (VOC) emissions. Both total VOC and methane values are presented. Each home used an Automated Woodstove Emissions Sampler system, developed for the EPA and Bonneville Power Administration, in a series of four week-long tests for each stove. The sequence of tests in each stove was cordwood, Pres-to-Logs, Eco-Logs, and a second, confirming test using Pres-to-Logs. Results show an average reduction of 52% in PM grams per hour emissions overall for the nine stoves using Pres-to-Logs. All nine stoves displayed a reduction in PM emissions. CO emissions were more modestly reduced by 27%, and VOCs were reduced 39%. The emissions reduction percentage was similar for both types of stoves.

Barnett, Stockton G.; Bidhouse, Roger D.

1992-07-07T23:59:59.000Z

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


281

Benefit/cost analysis for research in geothermal log interpretation. Final report  

DOE Green Energy (OSTI)

Well log interpretation, the process of inferring subsurface geology from geophysical measurements made in boreholes, is the most versatile and direct means available of assessing important physical and structural reservoir properties. Historically, well logging has been developed primarily for use in oil and gas wells, and its application in a different environment such as a geothermal reservoir creates complex problems. Present geothermal development is severely hindered by lack of data. Adaptation of well logging techniques holds the promise of reducing development costs, encouraging investment, and assisting regulatory permitting. Such benefits will translate directly into lower power costs and an increased domestic energy supply. A significant acceleration of geothermal power-on-line is possible plus cost reductions through reduction of drilling failure rate, reduction of average well cost, earlier recognition of bad wells, reduced flow testing, and savings due to provision of better data for regulatory decisions. Net undiscounted benefits in 1979 dollars from improving logging and interpretation in geothermal areas can exceed half a billion dollars in slightly more than a decade, about 300 million of this should be regarded as the potential benefit of the Los Alamos Scientific Laboratory Geothermal Log Interpretation Program or similar research.

Rigby, F.A.; Reardon, P.

1979-07-01T23:59:59.000Z

282

Acoustic methods for detecting water-filled fractures using commercial logging tools  

DOE Green Energy (OSTI)

The Los Alamos Scientific Laboratory Hot Dry Rock Geothermal Energy Development Project, under the Department of Energy and in cooperation with Dresser Atlas, has conducted single- and dual-well acoustic measurements to detect fractures in the artificial geothermal reservoir at the Fenton Hill New Mexico experimental site. The measurements were made using modified Dresser Atlas logging tools. Signals traversed distances of from 48 to 150 feet between two wells. Signals intersecting hydraulic fractures in the reservoir under both hydrostatic and pressurized conditions were simultaneously detected in both wells. Upon reservoir pressurization, signals along many ray paths were severely attenuated throughout their entire coda. In addition obvious shear wave arrivals were notably absent. The signals were processed to obtain Full-Wave Acoustic, Power, and Normalized Equi-Power Logs. Analysis of these logs identified the effective ''top'' of a region of hydraulically activated fractures and fractures intersecting the injection well behind casing.

Albright, J.N.; Aamodt, R.L.; Potter, R.M.; Spence, R.W.

1978-01-01T23:59:59.000Z

283

Feasibility investigation and design study of optical well logging methods for high temperature geothermal wells  

DOE Green Energy (OSTI)

The objective of this project was exploration of a novel approach to high temperature well logging, based on a system of optical transducers and an optical transmission line both theoretically capable of operation to at least 600/sup 0/C. The scope of the work involved the accomplishment of ten specific tasks. These had as their objective the determination of feasibility, and identification of major problem areas, in the implementation of continuous temperature logging of geothermal wells using optical techniques. The following tasks are reported: literature review and data compilation, measurement of fiber properties production fiber procurement, investigation of methods of fiber termination, cable design and fabrication, and sensor and system studies. (MHR)

Swanson, R.K.; Anderson, R.E.; Ash, J.I.; Beissner, R.E.; Smith, V.D.

1978-03-01T23:59:59.000Z

284

Comprehensive study of LASL Well C/T-2 Roosevelt Hot Springs KGRA, Utah, and applications to geothermal well logging  

DOE Green Energy (OSTI)

Utah State Geothermal Well 9-1 in the Roosevelt Hot Springs KGRA, Beaver County, Utah, has been donated by Phillips Petroleum Company for calibration and testing of well-logging equipment in the hot, corrosive, geothermal environment. It is the second Calibration/Test Well (C/T-2) in the Geothermal Log Interpretation Program. A study of cuttings and well logs from Well C/T-2 was completed. This synthesis and data presentation contains most of the subsurface geologic information needed to effect the total evaluation of geophysical logs acquired in this geothermal calibration/test well, C/T-2.

Glenn, W.E.; Hulen, J.B.; Nielson, D.L.

1981-02-01T23:59:59.000Z

285

Borehole Logging Methods for Exploration and Evaluation of Uranium Deposits (1967)  

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

Borehole logging methods for exploration Borehole logging methods for exploration and evaluation o f uranium deposits . Philip H. O d d , Robert F. Bmullad and Carl P. Lathan rej~rinkttl fnlm Mining and Groundwater Geophysiall967 Borehole logging methods for exploration and evaluation of uranium deposits Philip H. Dodd, Robert F. Droullard and Carl P. Lathan US. Atomic Energy Commhwn GmrPd Jtinct&n, Colorado Abstract, M o l e 1 - i s thc geophysical methad mast exten&@ w r t i n the Udtrrd States for exploratio~ md edwtim of wanhi &pod&. dammow lop, C o r n r n d j suppkrnentd with a singbz-pobt msfstailee log, m t l y supply about 80 percent of the bask data for om regerve c W t i o R a d mu& of the w ~ k r 6 . p ~ &ngk inf~nnatio~ Tmck-mounted 'rotmy eqnipmcnt i s EMhmody emphy&& holes usually hwre a nominai b

286

Annual Logging Symposium, June 22-26, 2013 FAST ESTIMATION OF PERMEABILITY FROM FORMATION-TESTER  

E-Print Network (OSTI)

permeability (or mobility) from transient measurements of pressure and fractional flow. We develop a new method was prepared for presentation at the SPWLA 54th Annual Logging Symposium held in New Orleans, Louisiana, June mobility because more streamlines track flow into probes from large-mobility layers. In the presence of 5

Torres-Verdín, Carlos

287

Spectrum shape-analysis techniques applied to the Hanford Tank Farms spectral gamma logs  

SciTech Connect

Gamma-ray spectra acquired with high-energy resolution by the spectral gamma logging systems (SGLSs) at the U.S. Department of Energy Hanford Tank Farms, Richland, Washington, are being analyzed for spectral shape characteristics. These spectral shapes, together with a conventional peak-area analysis, enable an analyst not only to identify the gamma-emitting species but also to determine in many instances its spatial distribution around a borehole and to identify the presence of the bremsstrahlung-producing contaminant {sup 90}Sr. The analysis relies primarily on the results of computer simulations of gamma spectra from the predominant radionuclide {sup 137}Cs for various spatial distributions. This log analysis methodology has evolved through an examination of spectral features from spectral logs taken at the SX, BY, and U Tank Farms at the Hanford Site. Initial results determined with this technique show it is possible, in most cases, to distinguish between concentrations of {sup 137}Cs. Work is continuing by experimentally measuring shape factors, incorporating spectrum shape processing in routine log analysis, and extending the techniques to additional radionuclides.

Wilson, R.D.

1997-05-01T23:59:59.000Z

288

Property:Building/SPPurchasedEngyNrmlYrMwhYrLogs | Open Energy Information  

Open Energy Info (EERE)

SPPurchasedEngyNrmlYrMwhYrLogs SPPurchasedEngyNrmlYrMwhYrLogs Jump to: navigation, search This is a property of type String. Logs Pages using the property "Building/SPPurchasedEngyNrmlYrMwhYrLogs" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + 0.0 + Sweden Building 05K0002 + 0.0 + Sweden Building 05K0003 + 0.0 + Sweden Building 05K0004 + 0.0 + Sweden Building 05K0005 + 0.0 + Sweden Building 05K0006 + 0.0 + Sweden Building 05K0007 + 0.0 + Sweden Building 05K0008 + 0.0 + Sweden Building 05K0009 + 0.0 + Sweden Building 05K0010 + 0.0 + Sweden Building 05K0011 + 0.0 + Sweden Building 05K0012 + 0.0 + Sweden Building 05K0013 + 0.0 + Sweden Building 05K0014 + 0.0 + Sweden Building 05K0015 + 0.0 + Sweden Building 05K0016 + 0.0 + Sweden Building 05K0017 + 0.0 +

289

Property:Building/SPPurchasedEngyForPeriodMwhYrLogs | Open Energy  

Open Energy Info (EERE)

SPPurchasedEngyForPeriodMwhYrLogs SPPurchasedEngyForPeriodMwhYrLogs Jump to: navigation, search This is a property of type String. Logs Pages using the property "Building/SPPurchasedEngyForPeriodMwhYrLogs" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + 0.0 + Sweden Building 05K0002 + 0.0 + Sweden Building 05K0003 + 0.0 + Sweden Building 05K0004 + 0.0 + Sweden Building 05K0005 + 0.0 + Sweden Building 05K0006 + 0.0 + Sweden Building 05K0007 + 0.0 + Sweden Building 05K0008 + 0.0 + Sweden Building 05K0009 + 0.0 + Sweden Building 05K0010 + 0.0 + Sweden Building 05K0011 + 0.0 + Sweden Building 05K0012 + 0.0 + Sweden Building 05K0013 + 0.0 + Sweden Building 05K0014 + 0.0 + Sweden Building 05K0015 + 0.0 + Sweden Building 05K0016 + 0.0 +

290

Property:Building/SPPurchasedEngyPerAreaKwhM2Logs | Open Energy Information  

Open Energy Info (EERE)

Logs Logs Jump to: navigation, search This is a property of type String. Logs Pages using the property "Building/SPPurchasedEngyPerAreaKwhM2Logs" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + 0.0 + Sweden Building 05K0002 + 0.0 + Sweden Building 05K0003 + 0.0 + Sweden Building 05K0004 + 0.0 + Sweden Building 05K0005 + 0.0 + Sweden Building 05K0006 + 0.0 + Sweden Building 05K0007 + 0.0 + Sweden Building 05K0008 + 0.0 + Sweden Building 05K0009 + 0.0 + Sweden Building 05K0010 + 0.0 + Sweden Building 05K0011 + 0.0 + Sweden Building 05K0012 + 0.0 + Sweden Building 05K0013 + 0.0 + Sweden Building 05K0014 + 0.0 + Sweden Building 05K0015 + 0.0 + Sweden Building 05K0016 + 0.0 + Sweden Building 05K0017 + 0.0 +

291

Quantitative interpretation of pulsed neutron capture logs: Part 1 --Fast numerical simulation  

E-Print Network (OSTI)

NEUTRON CAPTURE LOGS IN THINLY-BEDDED FORMATIONS Jordan G. Mimoun and Carlos Torres-Verdín, The University to capture neutrons. The lower the neutron energy, the more likely capture phenomena will take place; hence neutrons at thermal energies are the most likely to be absorbed. Consequently, monitoring the population

Torres-Verdín, Carlos

292

RC 22275 (Log# W0112-022) (12/05/2001) Computer Science/Mathematics  

E-Print Network (OSTI)

RC 22275 (Log# W0112-022) (12/05/2001) Computer Science/Mathematics IBM Research Report Scalable Center 650 Harry Road San Jose, CA 95120-6099 LIMITED DISTRIBUTION NOTICE This report has been submitted for publication outside of IBM and will probably be copyrighted if accepted for publica- tion. It has been issued

Shaikh, Anees

293

RC 22275 (Log# W0112022) (12/05/2001) Computer Science/Mathematics  

E-Print Network (OSTI)

RC 22275 (Log# W0112­022) (12/05/2001) Computer Science/Mathematics IBM Research Report Scalable Center 650 Harry Road San Jose, CA 95120­6099 LIMITED DISTRIBUTION NOTICE This report has been submitted for publication outside of IBM and will probably be copyrighted if accepted for publica­ tion. It has been issued

Shaikh, Anees

294

RC 22566 (Log# W0202-013) (09/25/2002) Computer Science/Mathematics  

E-Print Network (OSTI)

Heights, New York 10598 LIMITED DISTRIBUTION NOTICE This report has been submitted for publication outsideRC 22566 (Log# W0202-013) (09/25/2002) Computer Science/Mathematics IBM Research Report Protecting Report for early dissemination of its contents. In view of the transfer of copyright to the outside

Shaikh, Anees

295

Drillers' logs of wells in the Hanford reservation. Volume II  

SciTech Connect

Transcribed drillers' logs, in the same order as presented in Hanford Wells, 1973, are included for some 200 wells. The geologic structures at various depths are recorded. Drillers' notes are included when they help define the character of the strata being drilled or the nature or quality of the samples taken.

Summers, W.K.; Schwab, G.

1977-01-01T23:59:59.000Z

296

Annual Logging Symposium, June 22-26, 2013 JOINT STOCHASTIC INTERPRETATION OF CONVENTIONAL WELL  

E-Print Network (OSTI)

-Verdín, The University of Texas at Austin Copyright 2013, held jointly by the Society of Petrophysicists and Well Log-bearing shale has become a major source of energy in recent years. Assessment of rock properties is extremely porosity, low permeability, and organic-rich shale has become a major source of energy in recent years due

Torres-Verdín, Carlos

297

A user term visualization analysis based on a social question and answer log  

Science Conference Proceedings (OSTI)

The authors of this paper investigate terms of consumers' diabetes based on a log from the Yahoo!Answers social question and answers (Q&A) forum, ascertain characteristics and relationships among terms related to diabetes from the consumers' perspective, ... Keywords: Diabetes, Information seeking pattern, Q&A, Social question and answers, Term analysis, Visualization analysis

Jin Zhang, Yiming Zhao

2013-09-01T23:59:59.000Z

298

Similarity motion estimation and active tracking through spatial-domain projections on log-polar images  

Science Conference Proceedings (OSTI)

To cope with the huge amount of visual data in the environment, foveal sensing is not only an elegant biological solution, but also an appropriate mechanism in computer-based vision of artificial agents such as robots. An extremely important visual behavior ... Keywords: active tracking, active vision, log-polar mapping, motion estimation, projections

V. Javier Traver; Filiberto Pla

2005-02-01T23:59:59.000Z

299

AquaLog: an ontology-portable question answering system for the semantic web  

Science Conference Proceedings (OSTI)

As semantic markup becomes ubiquitous, it will become important to be able to ask queries and obtain answers, using natural language (NL) expressions, rather than the keyword-based retrieval mechanisms used by the current search engines. AquaLog is a ...

Vanessa Lopez; Michele Pasin; Enrico Motta

2005-05-01T23:59:59.000Z

300

On the implementation of a log-barrier progressive hedging method for multistage stochastic programs  

Science Conference Proceedings (OSTI)

A progressive hedging method incorporated with self-concordant barrier for solving multistage stochastic programs is proposed recently by Zhao [G. Zhao, A Lagrangian dual method with self-concordant barrier for multistage stochastic convex nonlinear ... Keywords: Lagrangian dual, Log-barrier method, Multistage stochastic programs, Progressive hedging method

Xinwei Liu; Kim-Chuan Toh; Gongyun Zhao

2010-05-01T23:59:59.000Z

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


301

Position-logging Drifting Buoys Using Decca Navigator and Argos for High-Resolution Spatial Sampling  

Science Conference Proceedings (OSTI)

The need for a precision current-tracking system that could he deployed for up to 12 months as part of the U.K. Natural Environment Research Council's North Sea Project led to the development of a position-logging drifting buoy, which employs ...

G. Roberts; J. D. Last; E. W. Roberts; A. E. Hill

1991-10-01T23:59:59.000Z

302

Log Cabins  

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

had to roof it; cut openings for the door, fireplace and a window or two; and chink the walls with splints of wood held in place by clay, moss, or crude lime mortar. Sometimes he...

303

Milestone Log  

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

suggestions for reducing this burden, to Office of Information Resources Management, AD-241.2 - GTN, Paperwork Reduction Project (1910-0400), U.S. Department of Energy, 1000...

304

Model Documentation Report: Residential Demand Module of the ...  

U.S. Energy Information Administration (EIA)

New home heating technology choice model log-linear parameter ?. ... Percent of homes meeting ENERGY STAR Home criteria or better by heating technology

305

Parameter estimation from flowing fluid temperature logging data in unsaturated fractured rock using multiphase inverse modeling  

E-Print Network (OSTI)

Drift Scale Test at Yucca Mountain, Nevada, J. of Contam.the Drift Scale Test at Yucca Mountain Figure 1a. Figure 1b.pneumatic response at Yucca Mountain, Journal of Contaminant

Mukhopadhyay, S.

2009-01-01T23:59:59.000Z

306

Parameter estimation from flowing fluid temperature logging data in unsaturated fractured rock using multiphase inverse modeling  

E-Print Network (OSTI)

conductivity, and heat capacity measurements for boreholesconductivity, or specific heat capacity) and/or the initialand specific heat capacity. While it is possible in

Mukhopadhyay, S.

2009-01-01T23:59:59.000Z

307

Lithology identification of aquifers from geophysical well logs and fuzzy logic analysis: Shui-Lin Area, Taiwan  

Science Conference Proceedings (OSTI)

The purpose of this study is to construct a fuzzy lithology system from well logs to identify formation lithology of a groundwater aquifer system in order to better apply conventional well logging interpretation in hydro-geologic studies because well ... Keywords: Aquifer characterization, Artificial intelligence, Groundwater, Hydrogeology, Soft computing

Bieng-Zih Hsieh; Charles Lewis; Zsay-Shing Lin

2005-04-01T23:59:59.000Z

308

Illegal Logging The US Forest Service, through its International Programs office, actively works around the globe to  

E-Print Network (OSTI)

Illegal Logging The US Forest Service, through its International Programs office, actively works to enforce the recent amendment to the Lacey Act), the Forest Service's International Programs plays illegal logging from a robust and comprehensive suite of initiatives. Its programs are wide ranging

309

Coal log pipeline research at the University of Missouri. 3rd Quarterly report, July 1, 1993--September 30, 1993  

SciTech Connect

This report summarizes a research program on the transport of coal by formation of coal logs, and subsequent transport in pipelines. Separate projects within this program address questions on the formation of the coal logs, flow in pipelines, including slurry pipelines, interaction with water, wear in pipelines, and questions on economics and legal aspects.

Liu, H.

1994-05-01T23:59:59.000Z

310

Resistivity Log At Fort Bliss Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Resistivity Log At Fort Bliss Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Single-Well and Cross-Well Resistivity At Fort Bliss Area (DOE GTP) Exploration Activity Details Location Fort Bliss Area Exploration Technique Single-Well and Cross-Well Resistivity Activity Date Usefulness not indicated DOE-funding Unknown References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Resistivity_Log_At_Fort_Bliss_Area_(DOE_GTP)&oldid=689878" Categories: Exploration Activities

311

Acoustic Logs At Steamboat Springs Area (Combs, Et Al., 1999) | Open Energy  

Open Energy Info (EERE)

Steamboat Springs Area (Combs, Et Al., 1999) Steamboat Springs Area (Combs, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Acoustic Logs At Steamboat Springs Area (Combs, Et Al., 1999) Exploration Activity Details Location Steamboat Springs Area Exploration Technique Acoustic Logs Activity Date Usefulness useful DOE-funding Unknown Notes Two other Sandia instruments were used briefly: the acoustic borehole televiewer (BHTV) yielded wellbore images down to 520';and a Sandia memory tool gave pressuretemperature data for a shut-in test at the end of the project. Because no oriented core has been collected in this field, the televiewer images giving fracture direction were extremely M.ormative, but the BHTV could not be used at greater depths because of its temperature

312

LLNL CATEGORICAL EXCLUSION DETERMINATION FORM ESPD LOG No: !ESH-EFA-NEPA-12-26401  

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

CATEGORICAL EXCLUSION DETERMINATION FORM CATEGORICAL EXCLUSION DETERMINATION FORM ESPD LOG No: !ESH-EFA-NEPA-12-26401 I NNSA/LSO LoG No: !NA-12-2~ 1. PROJECT/ACTIVITY TITLE: RADIOGRAPHY OF EXPLOSIVE SAMPLES 8321 C 2. PROJECT DESCRIPTION: I DATE: 8/13/2012 This proposed project would use existing radiography systems located in B321 C to provide useful, non-destntctive, three dimensional imaging and characterization of explosive samples. Current B321 C operations include non- destructive evaluations of up to 10 mg of explosive samples. Storage and use of explosives are controlled to ensure that the facility limits are within the definitions of a LSI hazard classification. The total building inventory of explosives shall not exceed 200 grams for all types of explosives except for Hazard Division 1.4S materials meeting the conditions stated below. The room inventoty

313

Resistivity Log At Fish Lake Valley Area (DOE GTP) | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Resistivity Log At Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Single-Well and Cross-Well Resistivity At Fish Lake Valley Area (DOE GTP) Exploration Activity Details Location Fish Lake Valley Area Exploration Technique Single-Well and Cross-Well Resistivity Activity Date Usefulness not indicated DOE-funding Unknown References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Resistivity_Log_At_Fish_Lake_Valley_Area_(DOE_GTP)&oldid=689876" Categories:

314

Test facility for well logging cables (in air at atmospheric pressure)  

DOE Green Energy (OSTI)

A system has been built to test, in air at ambient pressure, short sections of electromechanical cables which are potentially useful for geothermal well logging service. Electrical characteristics of the test cable are monitored while the cable is exposed to elevated temperature and tensioned in a manner simulating loading experienced by a typical well logging cable. Cable conductor resistance, dielectric resistance and capacitance are measured. The cable can be exposed to bending, simulating that which occurs when passing over sheaves or wound on or off a drum. Cable anchors are arranged to permit nearly 100 percent strength tensioning in the heated section. Electrical connectors are made at the unstrained ends at ambient temperature. The system can also be used to tension test cable terminations at elevated temperatures.

Not Available

1977-02-01T23:59:59.000Z

315

Pressure Temperature Log At Steamboat Springs Area (Combs, Et Al., 1999) |  

Open Energy Info (EERE)

Steamboat Springs Area (Combs, Et Al., 1999) Steamboat Springs Area (Combs, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Pressure Temperature Log At Steamboat Springs Area (Combs, Et Al., 1999) Exploration Activity Details Location Steamboat Springs Area Exploration Technique Pressure Temperature Log Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Downhole data during production and injection tests were acquired using pressure/temperature/spinner (PTS) tools from two dtierent service companies. Although details differed, all the commercial downhole instruments were designed to take data and to transmit that data uphole in real time, using a singleconductor wireline. All the instruments (each company used more than one) employed a dewar, or thermal flasIq to protect

316

LLNL CATEGORICAL EXCLUSION DETERMINATION FORM ESPD LOG No: !ESH-EFA-NEPA-12-26401  

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

CATEGORICAL EXCLUSION DETERMINATION FORM CATEGORICAL EXCLUSION DETERMINATION FORM ESPD LOG No: !ESH-EFA-NEPA-12-26401 I NNSA/LSO LoG No: !NA-12-2~ 1. PROJECT/ACTIVITY TITLE: RADIOGRAPHY OF EXPLOSIVE SAMPLES 8321 C 2. PROJECT DESCRIPTION: I DATE: 8/13/2012 This proposed project would use existing radiography systems located in B321 C to provide useful, non-destntctive, three dimensional imaging and characterization of explosive samples. Current B321 C operations include non- destructive evaluations of up to 10 mg of explosive samples. Storage and use of explosives are controlled to ensure that the facility limits are within the definitions of a LSI hazard classification. The total building inventory of explosives shall not exceed 200 grams for all types of explosives except for Hazard Division 1.4S materials meeting the conditions stated below. The room inventoty

317

Resistivity Log At The Needles Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Resistivity Log At The Needles Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Single-Well and Cross-Well Resistivity At The Needles Area (DOE GTP) Exploration Activity Details Location The Needles Area Exploration Technique Single-Well and Cross-Well Resistivity Activity Date Usefulness not indicated DOE-funding Unknown References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Resistivity_Log_At_The_Needles_Area_(DOE_GTP)&oldid=689880" Categories: Exploration Activities

318

Hourly analysis of a very large topically categorized web query log  

E-Print Network (OSTI)

We review a query log of hundreds of millions of queries that constitute the total query traffic for an entire week of a generalpurpose commercial web search service. Previously, query logs have been studied from a single, cumulative view. In contrast, our analysis shows changes in popularity and uniqueness of topically categorized queries across the hours of the day. We examine query traffic on an hourly basis by matching it against lists of queries that have been topically pre-categorized by human editors. This represents 13 % of the query traffic. We show that query traffic from particular topical categories differs both from the query stream as a whole and from other categories. This analysis provides valuable insight for improving retrieval effectiveness and efficiency. It is also relevant to the development of enhanced query disambiguation, routing, and caching algorithms.

Steven M. Beitzel; Eric C. Jensen; Abdur Chowdhury; David Grossman; Ophir Frieder

2004-01-01T23:59:59.000Z

319

Evaluation of Non-Nuclear Techniques for Well Logging: Final Report  

SciTech Connect

The focus of this study is the understanding of the technical obstacles that hinder the replacement of and the disadvantages from the loss of extensive interpretation experience based on data accumulated with AmBe. Enhanced acoustic and electromagnetic sensing methods in combination with non-isotope-based well logging techniques have the potential to complement and/or replace existing isotope-based techniques, providing the opportunity to reduce oil industry dependence on isotopic sources such as AmBe.

Bond, Leonard J.; Griffin, Jeffrey W.; Harris, R. V.; Denslow, Kayte M.; Moran, Traci L.

2011-08-01T23:59:59.000Z

320

Acoustic logging through casing to detect hydrocarbons and determine porosity in the Wilmington Field, CA  

SciTech Connect

The Wilmington Field, located in the Los Angeles Basin, CA, is composed of relatively unconsolidated turbiditic sands waterflooded for more than 40 years. As is common in this and other oil fields in California and elsewhere, considerable bypassed oil remains in place. The water-oil ratio from one well selectively completed in high-oil saturation sands is significantly lower than the water-oil ratio in adjacent wells. We have begun a 2-year test program to identify sands with high remaining oil saturations by logging old cased wells using a high power low frequency acoustic logging tool as part of a project co-funded by the Department of Energy (DOE PON PS22-94BC14972). Formation compressional-wave velocity is obtained from monopole data. Formation shear-wave velocity is obtained by analyzing dipole wave modes. In some wells, however, problems associated with poor cement-casing and cement-formation bond, casing eccentricity in the well, and tool eccentricity in the casing make it difficult to detect the dipole mode. Where good data has been obtained, compressional-wave velocities determined in the same cased hole from logs recorded by two different companies agree quite well, as do open- and cased-hole compressional and shear-wave velocities. Porosities determined through casing using shear-wave velocities match conventional open-hole log values. Saturations determined from the velocities and their ratio are similar to those calculated using Archie's Law. Relationships between porosities, saturations, and velocities are consistent with theoretical expectations. The results indicate that it is possible to determine porosity and saturation through casing using acoustic methods even in relatively unconsolidated sands such as those found in the Wilmington Field, provided sufficiently good monopole and dipole waveforms can be obtained.

Moos, D. (Stanford Univ., CA (United States)); Hooks, A. (MPI, Houston, TX (United States)); Walker, S. (Tidelands Oil Production Co., Long Beach, CA (United States))

1996-01-01T23:59:59.000Z

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


321

Interpretation of well log data from four drill holes at Roosevelt Hot Springs KGRA  

DOE Green Energy (OSTI)

Well logs from four drill holes, Utah State Geothermal Wells 14-2, 52-21 and 72-16 and Geothermal Power Corporation's thermal gradient hole GPC-15 have been digitized, plotted and studied. This study had three objectives: (1) to present the well log data in a convenient format for easy study, (2) to determine the nature of the geothermal reservoir rock and fluid properties, and (3) to make some inference on fluid entry locations in the boreholes and their effect on heat flow. The temperature logs and gradients computed from these logs have been used to examine heat flow in the vicinity of the four drill holes. Assumed and calculated thermal conductivities have been used in the analyses, 4 mcal/cm /sup 0/C sec for the alluvium and 7 mcal/cm /sup 0/C sec for the crystalline rocks. The data indicate that 14-2 and 72-16 reside in a dominantly convective heat flow environment, whereas GPC-15 and 52-21 reside in a dominantly conductive heat flow environment. The convective regions are believed to be fracture controlled and only portions of each hole reside totally in a convective region; in each case it is the upper bedrock portion of the hole. In every case the alluvium or upper portion of the alluvium acts as a thermal blanket over the system. Maximum heat flow among the holes, 40 ..mu.. cal/cm/sup 2/ sec, occurs in the vicinity of 72-16 and the lowest heat flow, 4 ..mu.. cal/cm/sup 2/ sec, in the vicinity of GPC-15. (MHR)

Glenn, W.E.; Hulen, J.B.

1979-12-01T23:59:59.000Z

322

Measuring Logging Impacts on Forest Carbon Stocks Using Ground and Aerial-based Methods  

Science Conference Proceedings (OSTI)

The research conducted under this project contributes to EPRI member efforts to identify science-based, cost-effective methods to measure and monitor forest management carbon offsets. Specifically, this project tested the use of aerial photography to monitor forest carbon stock changes that result from logging in Ohio and Bolivia. This report covers all phases of the work under this contract and compares methods used in Ohio and Bolivia. It discusses the applicability of methods to the monitoring of dual...

2005-11-30T23:59:59.000Z

323

Drillers' logs of wells in the Hanford reservation. Volume I  

SciTech Connect

More than 3000 wells and test holes have been drilled within the Hanford Reservation. Information on these wells range from complete sample suites complemented by bore hole geophysical studies to no record at all. Often the driller's log is the only record available for a well. This report is a product of the continuing project aimed at quantifying the hydraulic parameters of the synthetic flow system of the Hanford Reservation. The subsurface geology of the Hanford Reservation must be understood before the hydrologic parameters of the rocks can be estimated with any accuracy. To refine the state of our knowledge of the hydrologic regime all available data concerning the reservation geology must be considered and evaluated. Transcriptions are presented of 417 drillers' logs. This compilation includes every original driller's report we could obtain for the 600, 1100, and 3000 areas of the Hanford Reservation, but only a few logs from each of the 100, 200, and 300 areas where holes are very close together. The standard format consists of two parts: a heading that gives the general information for the well, and the description of the material penetrated.

Summers, W.K.; Schwab, G.

1977-01-01T23:59:59.000Z

324

Spatial Domain Watermarking Scheme for Colored Images Based on Log-average Luminance  

E-Print Network (OSTI)

In this paper a new watermarking scheme is presented based on log-average luminance. A colored-image is divided into blocks after converting the RGB colored image to YCbCr color space. A monochrome image of 1024 bytes is used as the watermark. To embed the watermark, 16 blocks of size 8X8 are selected and used to embed the watermark image into the original image. The selected blocks are chosen spirally (beginning form the center of the image) among the blocks that have log-average luminance higher than or equal the log-average luminance of the entire image. Each byte of the monochrome watermark is added by updating a luminance value of a pixel of the image. If the byte of the watermark image represented white color (255) a value is added to the image pixel luminance value, if it is black (0) the is subtracted from the luminance value. To extract the watermark, the selected blocks are chosen as the above, if the difference between the luminance value of the watermarked image pixel and the original image pixe...

Hussein, Jamal A

2010-01-01T23:59:59.000Z

325

On the use of cluster-based partial message logging to improve fault tolerance for MPI HPC applications  

Science Conference Proceedings (OSTI)

Fault tolerance is becoming a major concern in HPC systems. The two traditional approaches for message passing applications, coordinated checkpointing and message logging, have severe scalability issues. Coordinated checkpointing protocols make all processes ...

Thomas Ropars; Amina Guermouche; Bora Uar; Esteban Meneses; Laxmikant V. Kal; Franck Cappello

2011-08-01T23:59:59.000Z

326

An $O(\\sqrt{n}\\log \\frac{(x^0)^Ts^0}{\\epsilon})$ iteration primal-dual ...  

E-Print Network (OSTI)

An $O(\\sqrt{n}\\log \\frac{(x^0)^Ts^0}{\\epsilon})$ iteration primal-dual path- following method, based on wide neighborhoods and large updates, for monotone...

327

Method of assaying uranium with prompt fission and thermal neutron borehole logging adjusted by borehole physical characteristics. [Patient application  

DOE Patents (OSTI)

Uranium formations are assayed by prompt fission neutron logging techniques. The uranium in the formation is proportional to the ratio of epithermal counts to thermal or epithermal dieaway. Various calibration factors enhance the accuracy of the measurement.

Barnard, R.W.; Jensen, D.H.

1980-11-05T23:59:59.000Z

328

Method of assaying uranium with prompt fission and thermal neutron borehole logging adjusted by borehole physical characteristics  

DOE Patents (OSTI)

Uranium formations are assayed by prompt fission neutron logging techniques. The uranium in the formation is proportional to the ratio of epithermal counts to thermal or eqithermal dieaway. Various calibration factors enhance the accuracy of the measurement.

Barnard, Ralston W. (Albuquerque, NM); Jensen, Dal H. (Albuquerque, NM)

1982-01-01T23:59:59.000Z

329

Space age telemetry for geothermal well logging: the wireline transmission link  

DOE Green Energy (OSTI)

The development of aerospace telemetry has opened new communication data links for making measurements in deep boreholes in the earth's crust. However, now a transmission line must be used since high-frequency signals will not propagate through this medium. Further restrictions are imposed upon well-logging transmission lines in high-temperature boreholes. It is possible to extend the bandwidth and number of data channels to enhance measurements in geothermal boreholes by combining aerospace telemetry techniques with thermal protection systems and careful selection of wireline data transmission configurations. 5 refs., 2 figs.

Kolar, J.D.; Dennis, B.R.; Stephani, E.L.; Gutierrez, P.

1985-01-01T23:59:59.000Z

330

High-voltage supply for neutron tubes in well-logging applications  

DOE Patents (OSTI)

A high voltage supply is provided for a neutron tube used in well logging. The biased pulse supply of the invention combines DC and full pulse techniques and produces a target voltage comprising a substantial negative DC bias component on which is superimposed a pulse whose negative peak provides the desired negative voltage level for the neutron tube. The target voltage is preferably generated using voltage doubling techniques and employing a voltage source which generates bipolar pulse pairs having an amplitude corresponding to the DC bias level.

Humphreys, D.R.

1982-09-15T23:59:59.000Z

331

A Numerical Feasibility Study of Three-Component Induction Logging for Three Dimensional Imaging About a Single Borehole  

Science Conference Proceedings (OSTI)

A theoretical analysis has been completed for a proposed induction logging tool designed to yield data which are used to generate three dimensional images of the region surrounding a well bore. The proposed tool consists of three mutually orthogonal magnetic dipole sources and multiple 3 component magnetic field receivers offset at different distances from the source. The initial study employs sensitivity functions which are derived by applying the Born Approximation to the integral equation that governs the magnetic fields generated by a magnetic dipole source located within an inhomogeneous medium. The analysis has shown that the standard coaxial configuration, where the magnetic moments of both the source and the receiver are aligned with the axis of the well bore, offers the greatest depth of sensitivity away from the borehole compared to any other source-receiver combination. In addition this configuration offers the best signal-to-noise characteristics. Due to the cylindrically symmetric nature of the tool sensitivity about the borehole, the data generated by this configuration can only be interpreted in terms of a two-dimensional cylindrical model. For a fill 3D interpretation the two radial components of the magnetic field that are orthogonal to each other must be measured. Coil configurations where both the source and receiver are perpendicular to the tool axis can also be employed to increase resolution and provide some directional information, but they offer no true 3D information.

ALUMBAUGH, DAVID L.; WILT, MICHAEL J.

1999-08-01T23:59:59.000Z

332

Recovery Efficiency Test Project: Phase 1, Activity report. Volume 1: Site selection, drill plan preparation, drilling, logging, and coring operations  

SciTech Connect

The recovery Efficiency Test well project addressed a number of technical issues. The primary objective was to determine the increased efficiency gas recovery of a long horizontal wellbore over that of a vertical wellbore and, more specifically, what improvements can be expected from inducing multiple hydraulic fractures from such a wellbore. BDM corporation located, planned, and drilled a long radius turn horizontal well in the Devonian shale Lower Huron section in Wayne County, West Virginia, demonstrating that state-of-the-art technology is capable of drilling such wells. BDM successfully tested drilling, coring, and logging in a horizontal well using air as the circulating medium; conducted reservoir modeling studies to protect flow rates and reserves in advance of drilling operations; observed two phase flow conditions in the wellbore not observed previously; cored a fracture zone which produced gas; observed that fractures in the core and the wellbore were not systematically spaced (varied from 5 to 68 feet in different parts of the wellbore); observed that highest gas show rates reported by the mud logger corresponded to zone with lowest fracture spacing (five feet) or high fracture frequency. Four and one-half inch casting was successfully installed in the borehole and was equipped to isolate the horizontal section into eight (8) zones for future testing and stimulation operations. 6 refs., 48 figs., 10 tabs.

Overbey, W.K. Jr.; Carden, R.S.; Kirr, J.N.

1987-04-01T23:59:59.000Z

333

A borehole fluid conductivity logging method for the determination of fracture inflow parameters  

DOE Green Energy (OSTI)

It is of much current interest to determine the flow characteristics of fractures intersecting a wellbore to provide data in the estimation of the hydrologic behavior of fractured rocks. The fluid inflow rates from the fractures into the wellbore are important quantities to measure. Often these inflows are at very low rates. One often finds that only a few percent of the fractures identified by core inspection and geophysical logging are water-conducting fractures, the rest being closed, clogged, or isolated from the water flow system. A new procedure is proposed and a corresponding method of analysis developed to locate water-conducting fractures and obtain fracture inflow parameters by means of a time sequence of electric conductivity logs of the borehole fluid. The physical basis of the analysis method is discussed. The procedure is applied to an existing set of data, which shows initiation and growth of nine conductivity peaks in a 900-m section of a 1690-m borehole, corresponding to nine water-conducting fractures intersecting the borehole. We are able to match all nine peaks and determine the flow rates from these fractures. 16 refs., 28 figs., 5 tabs.

Tsang, Chin-Fu

1987-10-01T23:59:59.000Z

334

Evaluation of Non-Nuclear Techniques for Well Logging: Technology Evaluation  

SciTech Connect

This report presents an initial review of the state-of-the-art nuclear and non-nuclear well logging methods and seeks to understand the technical and economic issues if AmBe, and potentially other isotope sources, are reduced or even eliminated in the oil-field services industry. Prior to considering alternative logging technologies, there is a definite need to open up discussions with industry regarding the feasibility and acceptability of source replacement. Industry views appear to range from those who see AmBe as vital and irreplaceable to those who believe that, with research and investment, it may be possible to transition to electronic neutron sources and employ combinations of non-nuclear technologies to acquire the desired petro-physical parameters. In one sense, the simple answer to the question as to whether petro-physical parameters can be sensed with technologies other than AmBe is probably "Yes". The challenges come when attention turns to record interpretation. The many decades of existing records form a very valuable proprietary resource, and the interpretation of subtle features contained in these records are of significant value to the oil-gas exploration community to correctly characterize a well. The demonstration of equivalence and correspondence/correlation between established and any new sensing modality, and correlations with historic records is critical to ensuring accurate data interpretation. Establishing the technical basis for such a demonstration represents a significant effort.

Bond, Leonard J.; Denslow, Kayte M.; Griffin, Jeffrey W.; Dale, Gregory E.; Harris, Robert V.; Moran, Traci L.; Sheen, David M.; Schenkel, Thomas

2010-11-01T23:59:59.000Z

335

Identification of MHF (massive hydraulic fracturing) fracture planes and flow paths: A correlation of well log data with patterns in locations of induced seismicity  

DOE Green Energy (OSTI)

One of the critical steps in developing a hot dry rock geothermal system is the creation of flow paths through the rock between two wellbores. To date, circulation systems have only been created by drilling one wellbore, hydraulically fracturing the well (which induces microearthquakes), locating the microearthquakes and then drilling a second wellbore through the zone of seismicity. A technique for analyzing the pattern of seismicity to determine where fracture planes are located in the seismically active region has recently been developed. This allows us to distinguish portions of the seismically active volume which are most likely to contain significant flow paths. We applied this technique to seismic data collected during a massive hydraulic fracturing (MHF) treatment and found that the fracture planes determined by the seismic method are confirmed by borehole temperature and caliper logs which indicate where permeable fractures and/or zones of weakness intersect the wellbores. A geometric model based on these planes and well log data has enhanced our understanding of the reservoir flow paths created by fracturing and is consistent with results obtained during production testing of the reservoir.

Dreesen, D.; Malzahn, M.; Fehler, M.; Dash, Z.

1987-01-01T23:59:59.000Z

336

Formation evaluation using wavelet analysis on logs of the Chinji and Nagri Formations, northern Pakistan  

E-Print Network (OSTI)

The relatively new method of using wavelets in well log analysis is a powerful tool for defining multiple superimposed scales of lithic trends and contacts. Interpreting depositional processes associated with different scales of vertical variation within well log responses allows prediction of the lateral extent of sands and the distribution of internal flow barriers important for development of oil field recovery strategies. Wavelet analysis of grain-size variations in a 2.1 km thick fluvial section including the fluvial Chinji and Nagri Formations, northern Pakistan, revealed three major wavelengths. Reliability of the wavelength values was tested and confirmed by multiple sectioning of the dataset. These dominant wavelengths are interpreted to reflect vertical variations within individual channels, the stacking of channel belts within overbank successions due to river avulsion, and larger-scale channel stacking patterns within this foreland basin that may reflect allocyclic influences. Wavelet analysis allows quantification of the scales of periodic vertical variations that may not be strictly cyclic in nature. Comparison of total wavelet energies over all scales for each depth to the grain size and sand percentages yielded good correlations with sand proportion curves. Although changes in the wavelet energy profile were much more distinct with respect to grain size, lithic boundaries' locations were not detected based solely on the total of the wavelet energies. The data were also analyzed using Fourier transforms. Although Fourier transforms of the data yielded the smallest scale cyclicities, the higher-order cyclicities were not defined. This comparison demonstrates the power of wavelet analysis in defining types of repetitive, but not strictly cyclic, variations that are commonly observed in the sedimentary record. Assessments of Milankovitch cyclicities were performed for the Chinji and the Nagri Formations using statistical and analytical analysis methods. A clear match between Milankovitch frequency ratios and vertical lithic variations was not observed, and thus distinct climatic control on cyclic lithological trends was not demonstrated. Analysis using wavelets to determine wavelet coefficients helps quantify characteristic scales of vertical variations, cyclicities, zone thicknesses, and locations of abrupt lithic boundaries. Wavelet analysis provides methods that could be used to help automate well log analysis.

Tanyel, Emre Doruk

2006-08-01T23:59:59.000Z

337

U-067:WebSVN Input Validation Flaw in getLog() Permits Cross-Site Scripting  

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

7:WebSVN Input Validation Flaw in getLog() Permits Cross-Site 7:WebSVN Input Validation Flaw in getLog() Permits Cross-Site Scripting Attacks U-067:WebSVN Input Validation Flaw in getLog() Permits Cross-Site Scripting Attacks December 22, 2011 - 8:15am Addthis PROBLEM: WebSVN Input Validation Flaw in getLog() Permits Cross-Site Scripting Attacks PLATFORM: WebSVN 2.3.0 and prior versions ABSTRACT: A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the WebSVN software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user. reference LINKS: SecurityTracker Alert ID: 1026438 WebSVN version update WebSVN News IMPACT ASSESSMENT: Medium Discussion: The getLog() function does not properly filter HTML code from user-supplied

338

Resistivity Log At Valles Caldera - Sulphur Springs Area (Wilt & Haar,  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Resistivity Log At Valles Caldera - Sulphur Springs Area (Wilt & Haar, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Single-Well and Cross-Well Resistivity At Valles Caldera - Sulphur Springs Area (Wilt & Haar, 1986) Exploration Activity Details Location Valles Caldera - Sulphur Springs Area Exploration Technique Single-Well and Cross-Well Resistivity Activity Date Usefulness useful DOE-funding Unknown Notes The generalized resistivity tog (Fig. 8) indicates a multilayer section with considerable resistivity contrast between the layers. The near-surface

339

Planning, drilling, logging, and testing of energy extraction hole EE-1, Phases I and II  

DOE Green Energy (OSTI)

Energy Extraction Hole No. 1 (EE-1) is the second deep hole drilled into the Precambrian-age granitic rocks of the Jemez Mountains of north-central New Mexico. EE-1 was drilled to intersect a hydraulic fracture extending outward from near the bottom of previously drilled hole GT-2, thus completing the underground circulation loop required for the hot dry rock geothermal energy extraction experiment. Directional drilling techniques were used to intersect the fracture zone. In addition, high-temperature instrumentation and equipment development, hydraulic fracturing experiments, pressure-flow testing of the fracture systems, and fracture mapping and borehole-ranging technique activities were conducted. The drilling, logging, and testing operations in EE-1 are described.

Pettitt, R.A.

1977-08-01T23:59:59.000Z

340

Resistivity Log At Fort Bliss Area (Combs, Et Al., 1999) | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Resistivity Log At Fort Bliss Area (Combs, Et Al., 1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Single-Well and Cross-Well Resistivity At Fort Bliss Area (Combs, Et Al., 1999) Exploration Activity Details Location Fort Bliss Area Exploration Technique Single-Well and Cross-Well Resistivity Activity Date Usefulness not indicated DOE-funding Unknown Notes Three principal types of data were obtained from this drilling project: core samples of the lithology penetrated by the holes, records of drilling behavior (such as water level in the hole, changes in rate of penetration

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While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Geological structures from televiewer logs of GT-2, Fenton Hill, New Mexico: Part 2, Rectification  

DOE Green Energy (OSTI)

Televiewer logs from drill hole GT-2 at the Fenton Hill, New Mexico, Hot Dry Rock Site, have been rectified by conversion of structural traces on the scanner imagery to geographic location and orientation. The rectification method was direct inversion that consisted of mapping from the image to the wellbore, inverting the trace on the wellbore for principal points, and rotating from wellbore to geographic coordinates. From the test imagery of GT-2, 733 structures (fractures and foliations) were measured, compared with 42 structures from recovered core. The 733 new measurements listed in this report are a unique and unrepeatable collection of structural information from the Precambrian basement of northern New Mexico. This direct inversion method is accurate where the magnetic field vector is constant and the tool is centered and aligned in a circular wellbore. In other cases this method yields only approximate results.

Burns, K.L.

1987-08-01T23:59:59.000Z

342

Use of pulsed-neutron capture logs to identify steam breakthrough  

Science Conference Proceedings (OSTI)

This paper reports on identification of steam-breakthrough zones in a stacked sand/shale sequence with variable lateral continuity which is difficult. Such identification, however, would allow the modification of field operations to enhance recovery through improved vertical sweep and heat injection. Twenty pulsed-neutron capture (PNC) logs were run to identify the steam-breakthrough zone(s) in a seven-pattern area of Mobil's Middle expansion (MIDX) Steamflood Project in the South Belridge field. These PNC data were combined with data from recent replacement wells and a detailed geologic analysis. Evaluation of this combined information allowed identification of potential steam-breakthrough zone(s), and operations were modified to reduce and eliminate steam breakthrough.

Masse, P.J.; Gosney, T.C. (Mobil E and P U.S. Inc. (US)); Long, D.L. (Halliburton Logging Services Inc. (US))

1991-09-01T23:59:59.000Z

343

Electric Micro Imager Log At Coso Geothermal Area (2003) | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Electric Micro Imager Log At Coso Geothermal Area (2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Single-Well and Cross-Well Resistivity At Coso Geothermal Area (2003) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Single-Well and Cross-Well Resistivity Activity Date 2003 Usefulness not indicated DOE-funding Unknown Exploration Basis Fracture/stress analysis Notes A preliminary fracture/stress analysis was conducted for the recently drilled well 38C-9 as part of a continuing effort to characterize the

344

Tool development and application: pressure, temperature, spectral gamma ray logging of the SB-15 well  

DOE Green Energy (OSTI)

Sandia`s involvement with downhole instrumentation dates from the mid 1970s when work was centered on the development of a high-temperature acoustic borehole televiewer, and the establishment of a list of high- temperature component parts such as resistors, integrated circuits, and sensors. This work evolved into the development of memory logging devices for the US Continental Scientific Drilling Program. These tools were of low cost and very easy to use. Their deployment resulted in scientific advancement in understanding geothermal formations, and a thrust of the current program is to move memory tools from the scientific realm to the commercial environment. The tools developed and utilized in the SB-15 well among other field tests are completely self- contained in that power is obtained from batteries and data are stored in an electronic memory system. Three memory tools form the backbone of the initial Sandia tool suite. Pressure/temperature measurements are necessary for the evaluation of geothermal reservoirs, and they are relatively simple to make. Thus, the initial Sandia program concentrated on such a tool, and it has been successfully used in SB-15. This tool will form the basis for future tools since many engineering principles were proven in its evolution. This pressure/temperature tool combination is very useful in characterizing the geothermal reservoir. Another tool in the Sandia suite measures the natural gamma rays from the formation. This spectral gamma ray tool is useful in defining lithology, paleoflows, and certain clays. SB-15 well logging history and a preliminary interpretation of the data is presented in this report.

Sattler, A.R.; Norman, R.; Henfling, J.A.

1996-12-01T23:59:59.000Z

345

Multiple model inference.  

SciTech Connect

This paper compares three approaches for model selection: classical least squares methods, information theoretic criteria, and Bayesian approaches. Least squares methods are not model selection methods although one can select the model that yields the smallest sum-of-squared error function. Information theoretic approaches balance overfitting with model accuracy by incorporating terms that penalize more parameters with a log-likelihood term to reflect goodness of fit. Bayesian model selection involves calculating the posterior probability that each model is correct, given experimental data and prior probabilities that each model is correct. As part of this calculation, one often calibrates the parameters of each model and this is included in the Bayesian calculations. Our approach is demonstrated on a structural dynamics example with models for energy dissipation and peak force across a bolted joint. The three approaches are compared and the influence of the log-likelihood term in all approaches is discussed.

Swiler, Laura Painton; Urbina, Angel

2010-07-01T23:59:59.000Z

346

Research and development of improved geothermal well logging techniques, tools and components (current projects, goals and status). Final report  

DOE Green Energy (OSTI)

One of the key needs in the advancement of geothermal energy is availability of adequate subsurface measurements to aid the reservoir engineer in the development and operation of geothermal wells. Some current projects being sponsored by the U. S. Department of Energy's Division of Geothermal Energy pertaining to the development of improved well logging techniques, tools and components are described. An attempt is made to show how these projects contribute to improvement of geothermal logging technology in forming key elements of the overall program goals.

Lamers, M.D.

1978-01-01T23:59:59.000Z

347

Basalt features observed in outcrops, cores, borehole video imagery and geophysical logs, and basalt hydrogeologic study at the Idaho National Engineering Laboratory, Eastern Idaho  

Science Conference Proceedings (OSTI)

A study was undertaken to examine permeable zones identified in boreholes open to the underlying basalt and to describe the vertical cross flows present in the boreholes. To understand the permeable zones in the boreholes detailed descriptions and measurements of three outcrops in the Snake River Plain, three cores at the Idaho Chemical Processing Plant (ICPP) at the INEL, and over fifty borehole TV logs from the INEL were carried out. Based on the observations made on the three outcrops an idealized basalt lava flow model was generated that used a set of nomenclature that would be standard for the basalt lava flows studied. An upper vesicular zone, a sometimes absent columnar zone, central zone, and lower vesicular zone make up the basalt lava flow model. The overall distinction between the different zones are based on the vesicle shape size, vesicularity, and fractures present. The results of the studies also indicated that the basalt lava flows at the INEL are distal to medial facies pahoehoe lava flows with close fitting contacts. The most permeable zones identified in these basalts are fractured vesiculated portions of the top of the lava flow, the columnar areas, and basalt-flow contacts in order of importance. This was determined from impeller flowmeter logging at the INEL. Having this information a detailed stratigraphy of individual basalt lava flows and the corresponding permeable units were generated. From this it was concluded that groundwater flow at the ICPP prefers to travel along thin basalt lava flows or flow-units. Flow direction and velocity of intrawell flows detected by flowmeter is controlled by a nearby pumping well.

Bennecke, W.M.

1996-10-01T23:59:59.000Z

348

A Brief Review of the Basis for, and the Procedures Currently Utilized in, Gross Gamma-Ray Log Calibration (October 1976)  

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

A Brief Review of the Basis for, and the Procedures Currently Utilized in, Gross Gamma-Ray Log Calibration (October 1976)

349

Remedial action plan and site design for stabilization of the inactive uranium mill tailings sites at Slick Rock, Colorado. Appendix B to Attachment 3, Lithologic logs  

SciTech Connect

This report consists of well logging information gathered during work on the Remedial Action Plan and Site Design for Stabilization program.

Not Available

1993-07-01T23:59:59.000Z

350

Spatial Variability of Net Radiation and Soil Heat Flux Density on Two Logged Sites at Montmorency, Quebec  

Science Conference Proceedings (OSTI)

Net radiation data from 32 sample points and soil heat flux density values from six sample points on two logged sites at Montmorency in 1979 are presented. The two sites were of different ages; one had been clearcut in 1975 and the other in 1978. ...

J. H. McCaughey

1982-06-01T23:59:59.000Z

351

Annual Logging Symposium, June 21-24, 2009 Wireline and While-Drilling Formation-Tester Sampling with Oval, Focused,  

E-Print Network (OSTI)

- Filtrate Invasion in Deviated Wells Abdolhamid Hadibeik, The University of Texas at Austin, Mark Proett, Halliburton Energy Services, Carlos Torres-Verdín, Kamy Sepehrnoori, and Renzo Angeles, The University of Texas at Austin Copyright 2009, held jointly by the Society of Petrophysicists and Well Log Analysts

Torres-Verdín, Carlos

352

Back-propagating modes in elastic logging-while-drilling collars and their effect on PML stability  

Science Conference Proceedings (OSTI)

The Perfectly Matched Layer (PML) approach is widely used to implement the absorbing boundary conditions for coupled multi-physics wave propagation problems. However, it has been recognized that the solution in the PML absorbing layer can become unstable ... Keywords: Acoustic logging, Back-propagating mode, Borehole acoustics, Coupled problems, Perfectly matched layer, Wave propagation

Pawe? Jerzy Matuszyk, Carlos Torres-Verdn

2013-12-01T23:59:59.000Z

353

TREE-RING DATING OF OLD-GROWTH LONGLEAF PINE (PINUS PALUSTRIS MILL.) LOGS FROM AN EXPOSED TIMBER CRIB  

E-Print Network (OSTI)

as a timber crib dam. Inspection revealed these logs to be old-growth longleaf pines, which are now rare and Grashot 1976; Stahle 1979; Bortolot et al. 2001; Mann 2002; Grissino-Mayer and van de Gevel 2007), infer to help date other historical structures and prehistoric archaeological sites (Stahle 1979) and create

Grissino-Mayer, Henri D.

354

Improved Detection of Bed Boundaries for Petrophysical Evaluation with Well Logs: Applications to Carbonate and Organic-Shale Formations  

E-Print Network (OSTI)

: Applications to Carbonate and Organic-Shale Formations Zoya Heidari, SPE, Texas A&M University and Carlos of well logs acquired in organic shales and carbonates is challenging because of the presence of thin beds acquired in thinly bedded carbonates and in the Haynesville shale-gas formation. Estimates of petrophysical

Torres-Verdín, Carlos

355

Information extraction from noisy televiewer logs of inclined holes in hard rock  

DOE Green Energy (OSTI)

A feature-extraction method was adapted from satellite image-processing to the problem of extracting information from extremely noisy and narrow-range televiewer imagery from GT-2 at Fenton Hill. From televiewer logs, 733 structures were recovered, compared with 42 from core. The average spacings were 3.13 and 0.55 feet, respectively, indicating that the televiewer yielded only 17.5% of the information available from core. Two televiewer runs overlapped between 4000 and 4275 feet depth, but no detectable structures were repeated on both runs. The lack of repetition was explained as due to random processes arising from thermally-induced electronic noise and manually-operated narrow-range recording. Two new coefficients of association were defined, termed ''coplanarity'' P, and ''collinearity'', L, respectively. The coplanarity of foliations demonstrated that, despite no repetition of individuals, the two runs could be correlated. The coplanarity averaged 60 degrees, falling to 43.5 degrees at match, at a lag of -4.5 feet. There was no systematic maximum in the coplanarity for fractures, indicating that these were not serially-correlated. A periodicity in the collinearity for foliations indicated a set of folds with wavelength of 80 feet. 8 refs., 10 figs.

Burns, K.L.

1985-01-01T23:59:59.000Z

356

NETL: News Release - DOE's Oil and Gas Produced-Water Program Logs Key  

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

July 20, 2007 July 20, 2007 DOE's Oil and Gas Produced-Water Program Logs Key Milestones Cost-Effectively Treating Coproduced Water Boosts U.S. Energy, Water Supplies MORGANTOWN, WV - A research program funded by the U.S. Department of Energy (DOE) is making significant progress in developing new ways to treat and use water coproduced with oil and natural gas. The ultimate benefit is a two-for-one solution that expects to boost domestic energy supplies while enhancing the Nation's water supply. Coproduced water-some of which occurs naturally in subsurface formations, and some that is recovered following injection of water into an oil or gas reservoir to boost production-accounts for 98 percent of all waste generated by U.S. oil and natural gas operations. Produced-water volumes average nine barrels for each barrel of oil produced. Handling, treating, and safely disposing of this produced water has been a tough, costly challenge for oil and natural gas producers for decades. Much of the produced water has high concentrations of minerals or salts that make it unsuitable for beneficial use or surface discharge. An oilfield operator often must reinject such produced water into deep formations, sometimes resorting to costly trucking of the water to deep-injection well sites specially designated by the U.S. Environmental Protection Agency.

357

Improved geothermal well logging tools using no downhole electronics. Final report  

DOE Green Energy (OSTI)

A geothermal sonde for measuring temperature and pressure using no downhole electronics was designed and tested for operation at temperatures up to 275/sup 0/C (527/sup 0/F) and pressures of at least 10,000 psi. The measurement system uses variable resistance transducers which are powered in series by an uphole constant current supply. The output signals from the transducers are measured with a digital voltmeter having very high common mode and normal mode rejection ratios. The high rejection ratios of the digital voltmeter virtually eliminate any noise or pickup introduced into the measurement system. The system was tested in a hydroclave at temperatures up to 288/sup 0/C (550/sup 0/F) and at pressure up to 8,000 psi. The sonde was also tested in the Los Alamos geothermal well at temperatures up to 186/sup 0/C (366/sup 0/F) and pressures up to 4100 psi. The main problems encountered were associated with pressure transducers and the logging cable or the cable head and connector. The results of this project indicate that this is a feasible method of making geothermal measurements without the use of downhole electronics and that with further development the technique could be extended to higher temperatures and pressures.

Kratz, H.R.; Day, E.A.; Ginn, W.G.

1979-07-01T23:59:59.000Z

358

Log-parabolic spectra and particle acceleration in blazars. III: SSC emission in the TeV band from Mkn 501  

E-Print Network (OSTI)

Curved broad-band spectral distributions of non-thermal sources like blazars are described well by a log-parabolic (LP) law where the second degree term measures the curvature. LP energy spectra can be obtained for relativistic electrons by means of a statistical acceleration mechanism whose probability of acceleration depends on energy. In this paper we compute the spectra radiated by an electron population via synchrotron (S) and Synchro-Self Compton(SSC) processes to derive the relations between the LP parameters. These spectra were obtained by means of an accurate numerical code. We found that the ratio between the curvature parameters of the S spectrum to that of the electrons is equal to about 0.2 instead of 0.25, the value foreseen in the delta approximation. Inverse Compton spectra are also intrinsically curved and can be approximated by a log-parabola only in limited ranges. The curvature parameter, estimated around the SED peak, may vary from a lower value than that of the S spectrum up to that of emitting electrons depending on whether the scattering is in the Thomson or in the Klein-Nishina regime. We applied this analysis to computing the SSC emission from the BL Lac object Mkn 501 during the large flare of April 1997. We fit simultaneous BeppoSAX and CAT data and reproduced intensities and spectral curvatures of both components with good accuracy. The large curvature observed in the TeV range was found to be mainly intrinsic, and therefore did not require a large pair production absorption against the extragalactic background. We regard this finding as an indication that the Universe is more transparent at these energies than previously assumed by several models found in the literature. This conclusion is supported by recent detection of two relatively high redshift blazars with H.E.S.S.

E. Massaro; A. Tramacere; M. Perri; P. Giommi; G. Tosti

2005-11-23T23:59:59.000Z

359

Log-parabolic spectra and particle acceleration in blazars - II: The BeppoSAX wide band X-ray spectra of Mkn 501  

E-Print Network (OSTI)

We present the results of a spectral and temporal study of the complete set of BeppoSAX NFI (11) and WFC (71) observations of the BL Lac object Mkn 501. The WFC 2-28 keV data, reported here for the first time, were collected over a period of about five years, from September 1996 to October 2001. These observations, although not evenly distributed, show that Mkn 501, after going through a very active phase from spring 1997 to early 1999, remained in a low brightness state until late 2001. The data from the LECS, MECS and PDS instruments, covering the wide energy interval 0.1-150 keV, have been used to study in detail the spectral variability of the source. We show that the X-ray energy distribution of Mkn 501 is well described by a log-parabolic law in all luminosity states. This model allowed us to obtain good estimates of the SED synchrotron peak energy and of its associated power. The strong spectral variability observed, consisting of strictly correlated changes between the synchrotron peak energy and bolometric flux, suggests that the main physical changes are not only due to variations of the maximum Lorentz factor of the emitting particles but that other quantities must be varying as well. During the 1997 flare the high energy part of the spectrum of Mkn 501 shows evidence of an excess above the best fit log-parabolic law suggesting the existence of a second emission component that may be responsible for most of the observed variability.

E. Massaro; M. Perri; P. Giommi; R. Nesci; F. Verrecchia

2004-05-07T23:59:59.000Z

360

Probabilistic model for contextual retrieval  

Science Conference Proceedings (OSTI)

Contextual retrieval is a critical technique for facilitating many important applications such as mobile search, personalized search, PC troubleshooting, etc. Despite of its importance, there is no comprehensive retrieval model to describe the contextual ... Keywords: contextual retrieval, probabilistic model, query expansion, query log

Ji-Rong Wen; Ni Lao; Wei-Ying Ma

2004-07-01T23:59:59.000Z

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


361

Precision correlation of Kansas Pennsylvanian cyclothems emphasizing wire-line logs and conodonts in a sequence stratigraphic framework  

SciTech Connect

The lithologic components and genetic interpretation of classic Pennsylvanian cyclothems have clear counterparts in sequence stratigraphy. Blocky mudstones (paleosols) and associated extensive subaerial exposure surfaces bound individual cyclothems and represent type-1 sequence boundaries. The 'middle limestones' represent flooding units that may be thin or absent, depending on the relative rate of marine inundation. Most 'core shales' correspond to condensed sections accumulated during maximum flooding and are persistent from the basin to the upper shelf. Dense well-control with occasional cores provides a means to apply sequence-stratigraphic analysis to thin cyclothemic strata, which are below the resolution of conventional seismic profiles. A lithostratigraphic framework can be established by correlating the 'core shales' using their distinctive gamma-ray log signature. Rapid conodont evolution has resulted in a characteristic fauna for most of these 'core shales,' thus providing biostratigraphic confirmation of the lithostratigraphic correlations. The wide spread nature of these maximum transgressive deposits extends the utility of the conodont indicators across dissimilar biofacies and lithofacies that would otherwise be difficult to correlate. Integration of wire-line log and conodont indicators across dissimilar biofacies and lithofacies that would otherwise be difficult to correlate. Integration of wire-line log and conodont data by core and outcrop study could lay the groundwork for biostratigraphic analysis of 'core shale' cuttings obtained during drilling.

Lambert, L.L.; Heckel, P.H. (Univ. of Iowa, Iowa City (United States)); Watney, W.L.; Stevenson, G.M. (Kansas Geological Survey, Lawrence (United States)); Barrick, J.E.; Boardman, D.R. II (Texas Tech Univ., Lubbock (United States))

1991-03-01T23:59:59.000Z

362

WELLOG: computer software system for analyzing and plotting well log data (a user's guide to WELLOG. REV2)  

DOE Green Energy (OSTI)

WELLOG is a software system that has been developed to plot digitized well log data in a manner suitable for analysis. Multiple logs can be plotted side by side for correlation analysis, and up to three logs can be plotted on a cross plot. Data entry, editing, and modification functions are also provided by the program. Digitizing is accomplished by a TEKTRONIX 4954 (on-line) digitizing tablet, and plotting is done on a TEKTRONIX 4014 graphics terminal, a STATOS 42 electrostatic plotter, or a CALCOMP pen plotter using a device independent plotting system. This program (WELLOG.REV2) is not as system-dependent as the former version (WELLOG.REV1). The user must supply a program to digitize the data and supply subroutines to interface the program with file manipulation and plotting routines of their system. One major improvement is the use of an on-line digitizing system whereby the program accesses disk files rather than reading the data from tape. In REV2 the merge file has been automated such that the file is initialized automatically upon creation and also delete protected. The randomly spaced data capabilities have been greatly improved allowing the averaging and cross plotting of the data. Routines have been added which allow all of the cross plots excepting the Z-plot to be printed on a line printer. Dresser Atlas' A-K plot has also been added. The program is almost completely self-contained needing only a few interfacing and system subroutines.

Atwood, J.W.; Killpack, T.J.; Glenn, W.E.; Nutter, C.

1980-11-01T23:59:59.000Z

363

Geothermal: Sponsored by OSTI -- A numerical model ofhydro-thermo...  

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

A numerical model of hydro-thermo-mechanical coupling in a fractured rock mass Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On HomeBasic...

364

Correlation of wireline log characteristics with hydrothermal alteration and other reservoir properties of the Salton Sea and Westmorland geothermal fields, Imperial Valley, California, USA  

Science Conference Proceedings (OSTI)

A detailed study of wireline logs from 11 wells in the Salton Sea and Westmorland geothermal systems was undertaken in order to determine the effects of hydrothermal alteration on the response of electrical and gamma-gamma density well logs. For the Salton Sea geothermal field, definite correspondence between log responses and hydrothermal mineralogy is evident, which in turn is related to the physical properties of the rocks. Three hydrothermal and one unaltered zone can be identified from log data on shales. These are: (1) the unaltered montmorillonite zone (290/sup 0/ to 300/sup 0/C). The characteristic responses on well logs by which these zones are identified result primarily from changes in clay mineralogy of the shales and increases in density with progressive hydrothermal metamorphism. In the Westmorland geothermal field, differentiating mineral zones from log responses was only partially successful. However, analyses of both well log and petrologic data for wells Landers 1 and Kalin Farms 1 suggest that the former is heating up and the latter is cooling.

Muramoto, F.S.; Elders, W.A.

1984-05-01T23:59:59.000Z

365

Correlation of wireline log characteristics with hydrothermal alteration and other reservoir properties of the Salton Sea and Westmorland geothermal fields, Imperial Valley, California, USA  

DOE Green Energy (OSTI)

A detailed study of wireline logs from 11 wells in the Salton Sea and Westmorland geothermal systems was undertaken in order to determine the effects of hydrothermal alteration on the response of electrical and gamma-gamma density well logs. For the Salton Sea geothermal field, definite correspondence between log responses and hydrothermal mineralogy is evident, which in turn is related to the physical properties of the rocks. Three hydrothermal and one unaltered zone can be identified from log data on shales. These are: (1) the unaltered montmorillonite zone (<100/sup 0/ to 190/sup 0/C); (2) the illite zone (100/sup 0/ to 190/sup 0/C to 230/sup 0/ to 250/sup 0/C); (3) the chlorite zone (230/sup 0/ to 250/sup 0/C to 290/sup 0/ to 300/sup 0/C); and (4) the feldspar zone (>290/sup 0/ to 300/sup 0/C). The characteristic responses on well logs by which these zones are identified result primarily from changes in clay mineralogy of the shales and increases in density with progressive hydrothermal metamorphism. In the Westmorland geothermal field, differentiating mineral zones from log responses was only partially successful. However, analyses of both well log and petrologic data for wells Landers 1 and Kalin Farms 1 suggest that the former is heating up and the latter is cooling.

Muramoto, F.S.; Elders, W.A.

1984-05-01T23:59:59.000Z

366

Interpretation of Flow Logs from Nevada Test Site Boreholes to Estimate Hydraulic conductivity Using Numerical Simulations Constrained by Single-Well Aquifer Tests  

SciTech Connect

Hydraulic conductivities of volcanic and carbonate lithologic units at the Nevada Test Site were estimated from flow logs and aquifer-test data. Borehole flow and drawdown were integrated and interpreted using a radial, axisymmetric flow model, AnalyzeHOLE. This integrated approach is used because complex well completions and heterogeneous aquifers and confining units produce vertical flow in the annular space and aquifers adjacent to the wellbore. AnalyzeHOLE simulates vertical flow, in addition to horizontal flow, which accounts for converging flow toward screen ends and diverging flow toward transmissive intervals. Simulated aquifers and confining units uniformly are subdivided by depth into intervals in which the hydraulic conductivity is estimated with the Parameter ESTimation (PEST) software. Between 50 and 150 hydraulic-conductivity parameters were estimated by minimizing weighted differences between simulated and measured flow and drawdown. Transmissivity estimates from single-well or multiple-well aquifer tests were used to constrain estimates of hydraulic conductivity. The distribution of hydraulic conductivity within each lithology had a minimum variance because estimates were constrained with Tikhonov regularization. AnalyzeHOLE simulated hydraulic-conductivity estimates for lithologic units across screened and cased intervals are as much as 100 times less than those estimated using proportional flow-log analyses applied across screened intervals only. Smaller estimates of hydraulic conductivity for individual lithologic units are simulated because sections of the unit behind cased intervals of the wellbore are not assumed to be impermeable, and therefore, can contribute flow to the wellbore. Simulated hydraulic-conductivity estimates vary by more than three orders of magnitude across a lithologic unit, indicating a high degree of heterogeneity in volcanic and carbonate-rock units. The higher water transmitting potential of carbonate-rock units relative to volcanic-rock units is exemplified by the large difference in their estimated maximum hydraulic conductivity; 4,000 and 400 feet per day, respectively. Simulated minimum estimates of hydraulic conductivity are inexact and represent the lower detection limit of the method. Minimum thicknesses of lithologic intervals also were defined for comparing AnalyzeHOLE results to hydraulic properties in regional ground-water flow models.

Garcia, C. Amanda; Halford, Keith J.; Laczniak, Randell J.

2010-02-12T23:59:59.000Z

367

Daily Crime Log Monday, June 18, 2012 11:05:50 AM  

E-Print Network (OSTI)

2) and the concentration of 65Cu2+ estimated by the speciation model WHAM (1.0 (28)), we could]e^ equals zero and that [65 Cu2+ ] was constant (i.e., nominal [65 Cu2+ ] ) 5.2-µg L-1). That is, WHAM the speciation model WHAM (28) assuming that the lake water has a pH near 8 (30), a dissolved organic carbon

368

Application of direct-fitting, mass-integral, and multi-rate methods to analysis of flowing fluid electric conductivity logs from Horonobe, Japan  

E-Print Network (OSTI)

traces of drilling mud) and formation fluid flowing into theof drilling mud in the wellbore may impact fluid logging twodrilling mud itself is presumably significantly denser than formation fluid,

Doughty, C.; Tsang, C.-F.; Hatanaka, K.; Yabuuchi, S.; Kurikami, H.

2008-01-01T23:59:59.000Z

369

The application of borehole logging to characterize the hydrogeology of the Faultless site, Central Nevada Test Area  

SciTech Connect

The Central Nevada Test Area was the site of the Faultless underground nuclear test that could be a source of radionuclide contamination to aquifers in Hot Creek Valley, Nevada. Field studies in 1992 and 1993 have used hydrologic logging and water sampling to determine the adequacy of the current groundwater monitoring network and the status of water-level recovery to pre-shot levels in the nuclear chimney. The field studies have determined that there is a possibility for contaminant migration away from the Faultless event though the pre-event water level has not been attained, while new data raise questions about the ability of the current monitoring network to detect migration. Hydrologic logs from the postshot hole (drilled into the chimney created by the nuclear detonation) reveal inflow around 485 m below land surface. The physical and chemical characteristics of the inflow water indicate that its source is much deeper in the chimney, perhaps driven upward in a convection cell generated by heat near the nuclear cavity. Logging and sampling at monitoring wells HTH-1 and HTH-2 revealed that the completion of HTH-1 may be responsible for its elevated water level (as compared to pre-nuclear test levels) and may have also created a local mound in the water table in the alluvium that accounts for higher post-test water levels at HTH-2. This mound would serve to divert flow around the monitoring wells, so that only migration of contaminants through the underlying, higher pressure, volcanic units is currently monitored. A hydraulic high found in an abandoned hole located between the nuclear chimney and the monitoring wells further reduces the likelihood of HTH-1 or HTH-2 intercepting contaminant migration.

Chapman, J.B.; Mihevc, T.M.; Lyles, B.F.

1994-08-01T23:59:59.000Z

370

Impact evaluation of energy conservation measures installed at Mayr Brothers Logging Company under the Energy Savings Plan  

SciTech Connect

This impact evaluation of adjustable speed drives (ASDs), programmble logic controllers (PLCs), and high efficiency motors (HEMs) that were recently installed at Mayr Brothers Logging Co., Inc. (Mayr Bros.) was conducted for the Bonneville Power Administration (Bonneville) as part of an evaluation of its Energy $avings Plan (E$P) Program. The project consists of ASDs, PLCs, and HEMs that were installed at the Mayr Bros. new small log nill at their facility in Hoquiam, Washington. Energy savings directly accrue through improved motor efficiency and indirectly accrue via an increase in production rate. This latter effect reduces energy consumption per unit of production by spreading fixed energy requirements over a greater number of units. The objective of this impact evaluation was to assess how much electricity is being saved at Mayr Bros. as a result of the E$P and to determine how much the savings cost Bonneville and the region. The impact of the project was evaluated with a combination of engineering analysis, financial analysis, interviews, and submittal reviews (Mayr Bros. proposal and completion report). The energy conservation measures were incorporated into the small log mill while the mill was constructed in 1992 and 1993. Financing the new mill had stretched Mayr Bros. cash and credit resources to the limit. Without the acquisition payment, Mayr Bros. would not have been able to afford the additional investment in the energy conservation measures. Therefore, all of the project`s impact can be attributed to the E$P. The key recommendation resulting from this impact evaluation is to avoid the direct comparison of energy consumption estimates derived via engineering calculations and metering. If ``before and after`` metering is not possible, engineering calculations should be calibrated against metered data to enhance comparability.

Brown, D.R.; Spanner, G.E.

1995-05-01T23:59:59.000Z

371

Summary Report of Geophysical Logging For The Seismic Boreholes Project at the Hanford Site Waste Treatment Plant.  

SciTech Connect

During the period of June through October 2006, three deep boreholes and one corehole were drilled beneath the site of the Waste Treatment Plant (WTP) at the U.S. Department of Energy (DOE) Hanford Site near Richland, Washington. The boreholes were drilled to provide information on ground-motion attenuation in the basalt and interbedded sediments underlying the WTP site. This report describes the geophysical logging of the deep boreholes that was conducted in support of the Seismic Boreholes Project, defined below. The detailed drilling and geological descriptions of the boreholes and seismic data collected and analysis of that data are reported elsewhere.

Gardner, Martin G.; Price, Randall K.

2007-02-01T23:59:59.000Z

372

A new 5th-order differential type class-AB log-domain elliptic lowpass filter for video frequency applications  

Science Conference Proceedings (OSTI)

This paper proposes a new current-mode 5th-order differential type class-AB log-domain elliptic lowpass filter for video frequency applications. The design is based on the state-space synthesis method. The proposed filter has 5.75 MHz cut-off frequency ... Keywords: Current-mode circuits, Differential type class-AB circuits, Elliptic filters, Log-domain filters, State-space synthesis, Video frequency

Ali Kircay; Ugur Cam

2009-09-01T23:59:59.000Z

373

Models  

E-Print Network (OSTI)

A very typical statistical/econometric model assumes something like yt ? i.i.d. f (y, x, ?) (1) where f () is a parametric family known up to parameters ?. Parameter estimation: maximum likelihood ?n = arg max ? ln f (Yt, Xt, ?) (2) t What if the basic model assumptions of (1) are violated? The parametric family may not contain the true model f0(x, y) that generated the data; or the data may not be i.i.d.; etc. Misspecified

Stas Kolenikov; U Of Missouri; U Of Missouri

2007-01-01T23:59:59.000Z

374

Identification and Characterization of Hydrogeologic Units at the Nevada Test Site Using Geophysical Logs: Examples from the Underground Test Area Project  

Science Conference Proceedings (OSTI)

The diverse and complex geology of the Nevada Test Site region makes for a challenging environment for identifying and characterizing hydrogeologic units penetrated by wells drilled for the U.S. Department of Energy, National Nuclear Security Administration, Underground Test Area (UGTA) Environmental Restoration Sub-Project. Fortunately, UGTA geoscientists have access to large and robust sets of subsurface geologic data, as well as a large historical knowledge base of subsurface geological analyses acquired mainly during the underground nuclear weapons testing program. Of particular importance to the accurate identification and characterization of hydrogeologic units in UGTA boreholes are the data and interpretation principles associated with geophysical well logs. Although most UGTA participants and stakeholders are probably familiar with drill hole data such as drill core and cuttings, they may be less familiar with the use of geophysical logs; this document is meant to serve as a primer on the use of geophysical logs in the UGTA project. Standard geophysical logging tools used in the UGTA project to identify and characterize hydrogeologic units are described, and basic interpretation principles and techniques are explained. Numerous examples of geophysical log data from a variety of hydrogeologic units encountered in UGTA wells are presented to highlight the use and value of geophysical logs in the accurate hydrogeologic characterization of UGTA wells.

Lance Prothro, Sigmund Drellack, Margaret Townsend

2009-03-25T23:59:59.000Z

375

Annual Logging Symposium, May 25-28, 2008 COMPARISON OF WIRELINE FORMATION-TESTER SAMPLING  

E-Print Network (OSTI)

or an underbalanced drilling environment, there is no difference between the performances of focused or conventional-implicit compositional reservoir simulator is used to model both invasion and filtrate-cleanup processes. Comparison to a variety of circumstances, including the drilling environment, formation properties, and radial extent

Torres-Verdín, Carlos

376

Reading between the lines of failure logs: Understanding how HPC systems fail  

Science Conference Proceedings (OSTI)

As the component count in supercomputing installations continues to increase, system reliability is becoming one of the major issues in designing HPC systems. These issues will become more challenging in future Exascale systems, which are predicted to ... Keywords: Correlation,Probability,Hardware,Reliability,Program processors,Analytical models

Nosayba El-Sayed, Bianca Schroeder

2013-06-01T23:59:59.000Z

377

Geo topic model: joint modeling of user's activity area and interests for location recommendation  

Science Conference Proceedings (OSTI)

This paper proposes a method that analyzes the location log data of multiple users to recommend locations to be visited. The method uses our new topic model, called Geo Topic Model, that can jointly estimate both the user's interests and activity area ... Keywords: location recommendation, topic model

Takeshi Kurashima; Tomoharu Iwata; Takahide Hoshide; Noriko Takaya; Ko Fujimura

2013-02-01T23:59:59.000Z

378

Characterization of injection wells in a fractured reservoir using PTS logs, Steamboat Hills Geothermal Field, Nevada, USA  

DOE Green Energy (OSTI)

The Steamboat Hills Geothermal Field in northwestern Nevada, about 15 km south of Reno, is a shallow (150m to 825m) moderate temperature (155 C to 168 C) liquid-dominated geothermal reservoir situated in highly-fractured granodiorite. Three injection wells were drilled and completed in granodiorite to dispose of spent geothermal fluids from the Steamboat II and III power plants (a 30 MW air-cooled binary-type facility). Injection wells were targeted to depths below 300m to inject spent fluids below producing fractures. First, quasi-static downhole pressure-temperature-spinner (PTS) logs were obtained. Then, the three wells were injection-tested using fluids between 80 C and 106 C at rates from 70 kg/s to 200 kg/s. PTS logs were run both up and down the wells during these injection tests. These PTS surveys have delineated the subsurface fracture zones which will accept fluid. The relative injectivity of the wells was also established. Shut-in interzonal flow within the wells was identified and characterized.

Goranson, Colin; Combs, Jim

1995-01-26T23:59:59.000Z

379

The CERN Accelerator Logging Service- 10 Years in Operation: A Look at the Past, Present and Future  

E-Print Network (OSTI)

During the 10 years since it's first operational use, the scope and scale of the CERN Accelerator Logging Service (LS) has evolved significantly: from an LHC specific service expected to store 1TB / year; to a CERN-wide service spanning the complete accelerator complex (including related sub-systems and experiments) currently storing more than 50 TB / year on-line for some 1 million signals. Despite the massive increase over initial expectations the LS remains reliable, and highly usable - this can be attested to by the 5 million daily / average number of data extraction requests, from close to 1000 users. Although a highly successful service, demands on the LS are expected to increase significantly as CERN prepares LHC for running at top energy, which is likely to result in at least doubling current data volumes. Furthermore, focus is now shifting firmly towards a need to perform complex analysis on logged data, which in-turn presents new challenges. This paper reflects on 10 years as an operational service,...

Roderick, C; Kruk, G

2013-01-01T23:59:59.000Z

380

Modeling  

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

ALE-AMR ALE-AMR code Wangyi Liu, John Bernard, Alex Friedman, Nathan Masters, Aaron Fisher, Velemir Mlaker, Alice Koniges, David Eder June 4, 2011 Abstract In this paper we describe an implementation of a single-fluid inter- face model in the ALE-AMR code to simulate surface tension effects. The model does not require explicit information on the physical state of the two phases. The only change to the existing fluid equations is an additional term in the stress tensor. We show results of applying the model to an expanding Al droplet surrounded by an Al vapor, where additional droplets are created. 1 Introduction The Neutralized Drift Compression Experiment II (NDCX II) is an induction accelerator planned for initial commissioning in 2012. The final design calls for a 3 MeV, Li+ ion beam, delivered in a bunch with characteristic pulse duration of 1 ns, and transverse dimension of order 1 mm. The

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While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Methods and apparatus to produce stick-slip motion of logging tool attached to a wireline drawn upward by a continuously rotating wireline drum  

DOE Patents (OSTI)

Methods and apparatus are described to produce stick-slip motion of a logging tool within a cased well attached to a wireline that is drawn upward by a continuously rotating wireline drum. The stick-slip motion results in the periodic upward movement of the tool in the cased well described in terms of a dwell time during which time the tool is stationary, the move time during which time the tool moves, and the stroke that is upward distance that the tool translates during the "slip" portion of the stick-slip motion. This method of measurement is used to log the well at different vertical positions of the tool. Therefore, any typical "station-to-station logging tool" may be modified to be a "continuous logging tool", where "continuous" means that the wireline drum continually rotates while the tool undergoes stick-slip motion downhole and measurements are performed during the dwell times when the tool is momentarily stationary. The stick-slip methods of operation and the related apparatus are particularly described in terms of making measurements of formation resistivity from within a cased well during the dwell times when the tool is momentarily stationary during the periodic stick-slip motion of the logging tool.

Vail, III, William Banning (Bothell, WA); Momii, Steven Thomas (Seattle, WA)

1998-01-01T23:59:59.000Z

382

Methods and apparatus to produce stick-slip motion of logging tool attached to a wireline drawn upward by a continuously rotating wireline drum  

DOE Patents (OSTI)

Methods and apparatus are described to produce stick-slip motion of a logging tool within a cased well attached to a wireline that is drawn upward by a continuously rotating wireline drum. The stick-slip motion results in the periodic upward movement of the tool in the cased well described in terms of a dwell time during which time the tool is stationary, the move time during which time the tool moves, and the stroke that is upward distance that the tool translates during the ``slip`` portion of the stick-slip motion. This method of measurement is used to log the well at different vertical positions of the tool. Therefore, any typical ``station-to-station logging tool`` may be modified to be a ``continuous logging tool,`` where ``continuous`` means that the wireline drum continually rotates while the tool undergoes stick-slip motion downhole and measurements are performed during the dwell times when the tool is momentarily stationary. The stick-slip methods of operation and the related apparatus are particularly described in terms of making measurements of formation resistivity from within a cased well during the dwell times when the tool is momentarily stationary during the periodic stick-slip motion of the logging tool. 12 figs.

Vail, W.B. III; Momii, S.T.

1998-02-10T23:59:59.000Z

383

Feasibility investigation and design study of optical well logging methods for high temperature geothermal wells. Final report  

DOE Green Energy (OSTI)

The results are reported of a one-year program designed to investigate the feasibility of optical techniques applied to well-logging, to extend measurement capabilities in high-temperature geothermal boreholes. The basic concept is shown schematically. It makes use of a special armored cable containing fiber optic wave guides, connected to passive, downhole optical transducers. The latter modulate an optical carrier in response to borehole parameters. The optical carrier is a beam of infrared light transmitted from an optical source at the surface over an optical fiber. The modulated beam from the transducer is then returned to the surface over a second fiber, where conventional optical communications techniques are used to detect and decode the down hole information. (MHR)

Swanson, R.K.; Anderson, R.E.; Ash, J.I.; Beissner, R.E.; Smith, V.D.

1977-12-01T23:59:59.000Z

384

Application of sonic waveform analysis in carbonate reservoir of Angola  

SciTech Connect

The reservoir under study is a massive clastic carbonate with subvertical and large extended open fractures. Fracture detection by logs is correlated to cores in one well and the method is extended to non-cored wells. The logs concerned are primarily long spacing sonic waveforms and microresistivity anomalies on dipmeter records. Acoustic waveform validity is first verified by evaluating the headwave velocity ratio which must conform to the matrix lithology shown by Lithodensity and neutron logs. The amplitude spectrum of the compressional headwave is compared to the shear spectrum and the differences are explained in terms of reduction or conversion of the transmitted energy in the presence of large extended fractures. Other geometrical parameters are assumed constant as the reservoir is massive and of constant lithology and the recording sonde is kept centralized in a perfectly gauged borehole.

Gouder de Beauregard, C.; Paul, A.; Logar, L.; Blenkinsop, M.

1984-01-01T23:59:59.000Z

385

Fluid-Rock Characterization for NMR Well Logging and Special Core Analysis  

SciTech Connect

The overall objective of this effort is to develop, build and test a high-speed drilling motor that can meet the performance guidelines of the announcement, namely: 'The motors are expected to rotate at a minimum of 10,000 rpm, have an OD no larger than 7 inches and work downhole continuously for at least 100 hours. The motor must have common oilfield thread connections capable of making up to a drill bit and bottomhole assembly. The motor must be capable of transmitting drilling fluid through the motor'. To these goals, APS would add that the motor must be economically viable, in terms of both its manufacturing and maintenance costs, and be applicable to as broad a range of markets as possible. APS has taken the approach of using a system using planetary gears to increase the speed of a conventional mud motor to 10,000 rpm. The mud flow is directed around the outside of the gear train, and a unique flow diversion system has been employed. A prototype of the motor was built and tested in APS's high-pressure flow loop. The motor operated per the model up to {approx}4200 rpm. At that point a bearing seized and the performance was severely degraded. The motor is being rebuilt and will be retested outside of this program.

George Hirasaki; Kishore Mohanty

2007-12-31T23:59:59.000Z

386

SoilAtmosphere Exchange of Nitrous Oxide, Nitric Oxide, Methane, and Carbon Dioxide in Logged and Undisturbed Forest in the Tapajos National Forest, Brazil  

Science Conference Proceedings (OSTI)

Selective logging is an extensive land use in the Brazilian Amazon region. The soilatmosphere fluxes of nitrous oxide (N2O), nitric oxide (NO), methane (CH4), and carbon dioxide (CO2) are studied on two soil types (clay Oxisol and sandy loam ...

Michael Keller; Ruth Varner; Jadson D. Dias; Hudson Silva; Patrick Crill; Raimundo Cosme de Oliveira Jr.; Gregory P. Asner

2005-11-01T23:59:59.000Z

387

Development of improved gaskets, sealants and cables for use in geothermal well logging equipment. Final summary report  

DOE Green Energy (OSTI)

The inventigation of materials which could be used for fabricating elastomeric seals for geothermal well logging equipment is described. The seals were to be made either from a methylphenylcarborane-siloxane base gum stock, or from new fluoroelastomer compounds synthesized at Hughes Aircraft Company. A literature search was made to obtain data on carborane-siloxane polymers, synthesis routes for fluorinated elastomers and high temperature hydrolytic stability tests of elastomers. Information was obtained on the first two topics, but very little was available on hydrolysis testing. A number of compounds, based on carborane-siloxane, were formulated and cured. Compression set, hardness and shrinkage tests with postcure variations were made on the most promising formulations. A simple hydrolytic stability test at 275/sup 0/C (525/sup 0/F) and 830 psi was developed which indicated that both the carborane and siloxane bonds were easily broken after short exposure periods. Thermodynamic calculatons indicated that this result could be expected. Because of the agreement between empirical and theoretical data, work on the carborane-siloxanes was discontinued after approximately the first year. Synthesis efforts to produce a highly fluorinated elastomer based on perfluorolkylene oxide were continued through the entrie program. None of these routes produced a satisfactory elastomer.

Schwartz, S.; Basiulis, D.; Leyden, R.; Landis, A.

1978-10-01T23:59:59.000Z

388

The usability of switchgrass, rice straw, and logging residue as feedstocks for power generation in East Texas  

E-Print Network (OSTI)

This thesis examines the economic implications of using agriculturally based feedstock for bio-energy production in East Texas. Specifically I examined the use of switchgrass, rice straw, and logging residue as a feedstock for electrical power generation in East Texas replacing coal. To examine the effects of such a substitution, an environmental bio-complexity approach is used to analyze the interactions of agricultural, technological, economic, and environmental factors. In particular, lifecycle analysis (LCA) and Cost-Benefit analysis is used. The results show that as we use more bio-energy for power generation, we will get less Greenhouse Gas (GHG) emission, which will be an environmental benefit in the long run. The main problem is that cost increases. Current biomass feedstock production costs are generally too high for biomass feedstock to replace coal in power generation. However I find that GHG offset prices can make biomass economically attractive. In particular GHG offset prices and forgiveness for the emissions from combustion based on photosynthetic absorption would raise the price people would be willing to pay for biomass feedstock making it competitive.

Hong, Sung Wook

2003-05-01T23:59:59.000Z

389

teacher_logs.rtf  

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

Interpret data (e.g., compare, estimate, recognize patterns) 1 2 3 Engage in thinking skills (e.g., predict, infer, evaluate) 1 2 3 Develop skills in working collaboratively 1 2 3...

390

(wizard) and (analyst) logged ...  

Science Conference Proceedings (OSTI)

... Increased "nutrients" caused an overproduction of phytoplankton, which block the light reaching the sea grasses and algae. ...

2002-12-12T23:59:59.000Z

391

EXPGUI Revision Log  

Science Conference Proceedings (OSTI)

... 03/24 fix bug in save options Add unix capability to print selected text (should work on OS X if lpr points to desired printer -- I think) orient.tcl 1.9 2005 ...

392

(wizard) and (analyst) logged ...  

Science Conference Proceedings (OSTI)

... understanding calling for Amkor's staged equity purchase of ... MIC is an investment fund created by NTT ... first British Company to offer tax-free sports ...

2002-12-17T23:59:59.000Z

393

Conceptual Model At Raft River Geothermal Area (1988) | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Conceptual Model At Raft River Geothermal Area (1988) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Conceptual Model At Raft River Geothermal Area (1988) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Conceptual Model Activity Date 1988 Usefulness not indicated DOE-funding Unknown Exploration Basis Use geophysical logs to determine the reservoir transmissivity Notes Seven fracture orientation sets are recognized in the sedimentary and metamorphic rock units. Although the conventional geophysical logs showed

394

On business activity modeling using grammars  

Science Conference Proceedings (OSTI)

Web based applications offer a mainstream channel for businesses to manage their activities. We model such business activity in a grammar-based framework. The Backus Naur form notation is used to represent the syntax of a regular grammar corresponding ... Keywords: data mining, web log analysis

Savitha Srinivasan; Arnon Amir; Prasad Deshpande; Vladimir Zbarsky

2005-05-01T23:59:59.000Z

395

User's manual for TEDPED, an interactive code for testing the hypothesis of log-normally or normally distributed data. [In FORTRAN IV for PDP-10  

Science Conference Proceedings (OSTI)

TEDPED is an interactive computer code that produces both graphical and numerical descriptions of a set of data based on the user's assumption of either a normal or a log-normal distribution. Numerical statistics calculated by TEDPED at the user's option are the chi-square, Kolmogorov-Smirnov, and Pearson's. The linearized cumulative-probability distribution of the data may be plotted, together with a least-squares fit, consistent with either the normal or log-normal assumption. Data input may be by named data file or via the user's terminal keyboard. The code is written in FORTRAN and runs on a Digital Equipment Corporation PDP-10 computer; typical central-processor-unit execution time is about 0.32 s. 50 figures, 1 table.

Fields, D.E.; Little, C.A.; Shaeffer, D.L.

1980-06-01T23:59:59.000Z

396

Generalised Bayesian matrix factorisation models  

E-Print Network (OSTI)

PCA. . . . . . . . . . . . . . . . . . . . 24 2.2 Graphical model for Bayesian exponential family PCA. . . . . . . . . . . 33 2.3 Reconstruction of data from samples at various stages of the sampling. The top plot shows the change in the energy... and for the exponential family of distributions, ? is the conjugate dual of the log-partition function A?(?), giving ?(?) = A?(?). The conjugate dual function corresponds to the negative entropy of the particular exponential family distribution (Wainwright and Jordan...

Mohamed, Shakir

2011-03-15T23:59:59.000Z

397

Assessment of effectiveness of geologic isolation systems. CIRMIS data system. Volume 4. Driller's logs, stratigraphic cross section and utility routines  

SciTech Connect

The Assessment of Effectiveness of Geologic Isolation Systems (AEGIS) Program is developing and applying the methodology for assessing the far-field, long-term post-closure safety of deep geologic nuclear waste repositories. AEGIS is being performed by Pacific Northwest Laboratory (PNL) under contract with the Office of Nuclear Waste Isolation (ONWI) for the Department of Energy (DOE). One task within AEGIS is the development of methodology for analysis of the consequences (water pathway) from loss of repository containment as defined by various release scenarios. Analysis of the long-term, far-field consequences of release scenarios requires the application of numerical codes which simulate the hydrologic systems, model the transport of released radionuclides through the hydrologic systems to the biosphere, and, where applicable, assess the radiological dose to humans. The various input parameters required in the analysis are compiled in data systems. The data are organized and prepared by various input subroutines for use by the hydrologic and transport codes. The hydrologic models simulate the groundwater flow systems and provide water flow directions, rates, and velocities as inputs to the transport models. Outputs from the transport models are basically graphs of radionuclide concentration in the groundwater plotted against time. After dilution in the receiving surface-water body (e.g., lake, river, bay), these data are the input source terms for the dose models, if dose assessments are required. The dose models calculate radiation dose to individuals and populations. CIRMIS (Comprehensive Information Retrieval and Model Input Sequence) Data System is a storage and retrieval system for model input and output data, including graphical interpretation and display. This is the fourth of four volumes of the description of the CIRMIS Data System.

Friedrichs, D.R.

1980-01-01T23:59:59.000Z

398

Application of direct-fitting, mass-integral, and multi-ratemethods to analysis of flowing fluid electric conductivity logs fromHoronobe, Japan  

Science Conference Proceedings (OSTI)

The flowing fluid electric conductivity (FFEC) loggingmethod is an efficient way to provide information on the depths,salinities, and transmissivities of individual conductive featuresintercepted by a borehole, without the use of specialized probes. Usingit in a multiple-flow-rate mode allows, in addition, an estimate of theinherent "far-field" pressure heads in each of the conductive features.The multi-rate method was successfully applied to a 500-m borehole in agranitic formation and reported recently. The present paper presents theapplication of the method to two zones within a 1000-m borehole insedimentary rock, which produced, for each zone, three sets of logs atdifferent pumping rates, each set measured over a period of about oneday. The data sets involve a number of complications, such as variablewell diameter, free water table decline in the well, and effects ofdrilling mud. To analyze data from this borehole, we apply varioustechniques that have been developed for analyzing FFEC logs:direct-fitting, mass-integral, and the multi-rate method mentioned above.In spite of complications associated with the tests, analysis of the datais able to identify 44 hydraulically conducting fractures distributedover the depth interval 150-775 meters below ground surface. Thesalinities (in FEC), and transmissivities and pressure heads (indimensionless form) of these 44 features are obtained and found to varysignificantly among one another. These results are compared with datafrom eight packer tests with packer intervals of 10-80 m, which wereconducted in this borehole over the same depth interval. They are foundto be consistent with these independent packer-test data, thusdemonstrating the robustness of the FFEC logging method under non-idealconditions.

Doughty, C.; Tsang, C.-F.; Hatanaka, K.; Yabuuchi, S.; Kurikami, H.

2007-08-01T23:59:59.000Z

399

IN-SITU ASSAY OF TRANSURANIC RADIONUCLIDES IN THE VADOSE ZONE USING HIGH-RESOLUTION SPECTRAL GAMMA LOGGING - A HANFORD CASE STUDY  

Science Conference Proceedings (OSTI)

High-resolution spectral gamma logging in steel-cased boreholes is used to detect and quantify transuranic radionuclides in the subsurface. Pu-239, Pu-241, Am-241, and Np-237 are identified based on characteristic decay gammas. Typical minimum detectable levels are on the order of 20 to 40 nCi/g. In intervals of high transuranic concentrations, gamma rays from other sources may complicate analysis and interpretation. Gamma rays detected in the borehole may originate from three sources: decay of the parent transuranic radionuclide or a daughter; alpha interactions; and interactions with neutrons resulting from either spontaneous fission or alpha particle interactions.

ROHAY VJ; HENWOOD P; MCCAIN R

2009-11-30T23:59:59.000Z

400

State-Of-The-Art in Permeability Determination From Well Log Data: Part 2-Verifiable, Accurate Permeability Predictions, the Touch-Stone of All Models  

E-Print Network (OSTI)

, 1985. 12. Mohaghegh, S., Neural Network: What Can It Do for 8. Wendt, W. A., Sakurai, S., and Nelson, P

Mohaghegh, Shahab

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


401

An Information-based Cross-Language Information Retrieval Model  

E-Print Network (OSTI)

An Information-based Cross-Language Information Retrieval Model Bo Li and Eric Gaussier Universit in the information-based family for information retrieval, namely the LL (log-logistic) and SPL (smoothed power law, yielding the best performance overall. 1 Introduction Cross-Language Information Retrieval (CLIR

Paris-Sud XI, Université de

402

A model of job satisfaction for collaborative development processes  

Science Conference Proceedings (OSTI)

Modern software development relies on collaborative work as a means for sharing knowledge, distributing tasks and responsibilities, reducing risk of failures, and increasing the overall quality of the software product. Such objectives are achieved with ... Keywords: Job satisfaction, Log linear model, Pair programming

Witold Pedrycz; Barbara Russo; Giancarlo Succi

2011-05-01T23:59:59.000Z

403

Overpressure prediction by mean total stress estimate using well logs for compressional environments with strike-slip or reverse faulting stress state  

E-Print Network (OSTI)

Predicting correct pore-pressure is important for drilling applications. Wellbore stability problems, kicks, or even blow-outs can be avoided with a good estimate of porepressure. Conventional pore-pressure estimation methods are based on one-dimensional compaction theory and depend on a relationship between porosity and vertical effective stress. Strike-slip or reverse faulting environments especially require a different way to determine pore-pressure, since the overburden is not the maximum stress. This study proposes a method which better accounts for the three-dimensional nature of the stress field and provides improved estimates of pore-pressure. We apply the mean total stress estimate to estimate pore-pressure. Pore pressure is then obtained by modifying Eatonâ??s pore-pressure equations, which require either resistivity or sonic log data. The method was tested in the Snorre Field in the Norwegian North Sea, where the field changes from strike-slip to reverse stress state. Eatonâ??s resistivity and sonic equations were used to predict pore-pressure in this region by replacing the vertical stress by the mean total stress estimate. Results suggest that the modified Eaton method with resistivity log data gives better results for the area than the conventional method. The ratio of maximum horizontal stress to minimum horizontal stress throughout each well should be known for best results.

Ozkale, Aslihan

2006-12-01T23:59:59.000Z

404

New Model Atmospheres: Testing the Solar Spectrum in the UV  

E-Print Network (OSTI)

We present preliminary results on the calculation of synthetic spectra obtained with the stellar model atmospheres developed by Cardona, Crivellari, and Simonneau. These new models have been used as input within the SYNTHE series of codes developed by Kurucz. As a first step we have tested if SYNTHE is able to handle these models which go down to log tau(Ross)= -13. We have successfully calculated a synthetic solar spectrum in the wavelength region 2000--4500 A at high resolution (R=522,000). Within this initial test we have found that layers at optical depths with log tau(Ross) spectrum computed from a solar model. We anticipate that these new extended models will be a valuable tool for the analysis of UV stellar light arising from the outermost layers of the atmospheres.

Rodrguez-Merino, L H; Bertone, E; Chavez, M; Buzzoni, A

2007-01-01T23:59:59.000Z

405

New Model Atmospheres: Testing the Solar Spectrum in the UV  

E-Print Network (OSTI)

We present preliminary results on the calculation of synthetic spectra obtained with the stellar model atmospheres developed by Cardona, Crivellari, and Simonneau. These new models have been used as input within the SYNTHE series of codes developed by Kurucz. As a first step we have tested if SYNTHE is able to handle these models which go down to log tau(Ross)= -13. We have successfully calculated a synthetic solar spectrum in the wavelength region 2000--4500 A at high resolution (R=522,000). Within this initial test we have found that layers at optical depths with log tau(Ross) spectrum computed from a solar model. We anticipate that these new extended models will be a valuable tool for the analysis of UV stellar light arising from the outermost layers of the atmospheres.

L. H. Rodriguez-Merino; O. Cardona; E. Bertone; M. Chavez; A. Buzzoni

2007-10-05T23:59:59.000Z

406

"Tier","PRIORITY","Total Tickets Logged","Tickets Closed","Currently Open"  

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

Appendix 4 - iManage Help Desk Ticket - Select Systems - Total Issues Report",,,,"2012/01/01 - 2012/04/18" Appendix 4 - iManage Help Desk Ticket - Select Systems - Total Issues Report",,,,"2012/01/01 - 2012/04/18" "Tier","PRIORITY","Total Tickets Logged","Tickets Closed","Currently Open" "Others" ,"Critical" ,"High",5,8,1 ,"Medium",3,,1 ,"Low",,1 "CSC Helpdesk" ,"Critical" ,"High" ,"Medium" ,"Low" "Tier 1" ,"Critical",3 ,"High",819,288 ,"Medium",6669,3930,10 ,"Low",368,270,1 "Tier 2" ,"Critical",,3 ,"High",28,469,24 ,"Medium",721,3061,116 ,"Low",51,147,2 "Tier 3" ,"Critical"

407

The Economic Mobility in Money Transfer Models  

E-Print Network (OSTI)

In this paper, we investigate the economic mobility in some money transfer models which have been applied into the research on monetary distribution. We demonstrate the mobility by recording the agents' ranks time series and observing the volatility. We also compare the mobility quantitatively by employing an index, "the per capita aggregate change in log-income", raised by economists. Like the shape of distribution, the character of mobility is also decided by the trading rule in these transfer models. It is worth noting that even though different models have the same type of distribution, their mobility characters may be quite different.

Ding, N; Wang, Y; Ding, Ning; Xi, Ning; Wang, Yougui

2005-01-01T23:59:59.000Z

408

Database development and 3D modeling of textural variations in heterogeneous, unconsolidated aquifer media: Application to the Milan plain  

Science Conference Proceedings (OSTI)

The textural and hydrogeologic properties of loose deposits are closely connected to the sedimentary processes occurring in fluvial and glacio-fluvial systems. The proposed procedure combines geologic knowledge, coded well data logs stored in a hydrogeologic ... Keywords: Hydrogeologic flow model, Hydrogeologic structural model, Stratigraphic data, Water wells

Tullia Bonomi

2009-01-01T23:59:59.000Z

409

Development of improved gaskets, sealants and cables for use in geothermal well logging equipment. Interim summary report, January 1--December 31, 1977  

DOE Green Energy (OSTI)

Work is presented on materials which could be used for fabricating elastomeric seals for geothermal well logging equipment. A literature search was made to obtain data on carborane--siloxane polymers, synthesis routes for fluorinated elastomers, and high temperature hydrolytic stability tests of elastomers. Information was obtained on the first two topics, but very little was available on hydrolysis testing. A number of compounds, based on carbonane--siloxane, were formulated and cured. Compression set, hardness and shrinkage tests with post-cure variations were made on the most promising formulations. Hydrolytic stability tests at 275/sup 0/C (525/sup 0/F) and 830 psi and thermodynamic calculations indicated that the carborane and the siloxane bonds were easily broken after short exposure periods. Work on this polymer was therefore discontinued. Synthetic efforts to produce a perfluorinated elastomer are still continuing. A second elastomer ''Fasil'', not in the original proposal, based on a fluorinated siloxane, was also synthesized. A gum stock was prepared and subjected to the hydrolytic stability test. Extensive deterioration was observed after a short period of time. Work was discontinued on this polymer. Additional hydrolysis tests were run on other promising polymers. These included polyphenylene oxide, polyphenylene sulfide and pentaphenyl oxide. Good resistance was shown by the phenylene oxides and the polyphenylene sulfide.

Schwartz, S.; Basiulis, D.

1978-01-01T23:59:59.000Z

410

Topical report on subsurface fracture mapping from geothermal wellbores. Phase I. Pulsed radar techniques. Phase II. Conventional logging methods. Phase III. Magnetic borehole ranging  

DOE Green Energy (OSTI)

To advance the state-of-the-art in Hot Dry Rock technology, an evaluation is made of (i) the use of radar to map far-field fractures, (ii) the use of more than twenty different conventional well logging tools to map borehole-fracture intercepts, and (iii) the use of magnetic dipole ranging to determine the relative positions of the injection well and the production well within the fractured zone. It is found that according to calculations, VHF backscatter radar has the potential for mapping fractures within a distance of 50 +- 20 meters from the wellbore. A new technique for improving fracture identification is presented. Analyses of extant data indicate that when used synergistically the (1) caliper, (2) resistivity dipmeter, (3) televiewer, (4) television, (5) impression packer, and (6) acoustic transmission are useful for mapping borehole-fracture intercepts. Improvements in both data interpretation techniques and high temperature operation are required. The surveying of one borehole from another appears feasible at ranges of up to 200 to 500 meters by using a low frequency magnetic field generated by a moderately strong dipole source (a solenoid) located in one borehole, a sensitive B field detector that traverses part of the second borehole, narrow band filtering, and special data inversion techniques.

Hartenbaum, B.A.; Rawson, G.

1980-09-01T23:59:59.000Z

411

Evaluation of a Distributed Fiber-Optic Temperature Sensor for Logging Wellbore Temperature at the Beowawe and Dixie Valley Geothermal Fields  

DOE Green Energy (OSTI)

A distributed temperature sensor (DTS) system, utilizing Raman backscattering to measure temperatures of optical fiber, has recently been installed in production wells at the Beowawe and Dixie Valley, NV, geothermal fields. The system has the potential to reduce the cost and complexity of acquiring temperature logs. However, the optical transmission of the initial fibers installed at Beawawe degraded over several months, resulting in temperature errors. Optical transmission spectra of the failed fibers indicate hydroxide contamination via hydrogen diffusion as a possible failure mechanism. Additional fibers with coatings designed to resist hydrogen diffusion were installed and have maintained their optical transmission over several months in the 340-360 F Beowawe wells. The same fibers installed in a 470 F Dixie Valley well rapidly failed. Possible methods to prevent fiber degradation include encasing the fiber in metallic buffer layer that resists hydrogen diffusion. Additional methods to correct temperature errors include using additional optical sources to measure fiber losses at the operating wavelengths. Although the DTS system is expected to have one degree F accuracy, we have observed an average accuracy of five degrees. The fiber connections appear to be the uncertainty source. Using connectors with greater stability should restore accuracy.

Smithpeter, Colin; Norman, Randy; Krumhansl, James; Benoit, Dick; Thompson, Steve

1999-07-19T23:59:59.000Z

412

D-Dimensional Log Gravity  

E-Print Network (OSTI)

We study Einstein gravity in dimensions $D\\geq 4$ modified by curvature squared at critical point where the theory contains only massless gravitons. We show that at the critical point a new mode appears leading to a logarithmic gravity in the theory. The corresponding logarithmic solution may provide a gravity description of logarithmic CFT in higher dimensions.

Alishahiha, Mohsen

2011-01-01T23:59:59.000Z

413

NERSC Job Logs and Analytics  

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

& Allocations Policies Data Analytics & Visualization Science Gateways User Surveys NERSC Users Group User Announcements Help Operations for: Passwords & Off-Hours Status...

414

Hello, Log In Advanced Search  

E-Print Network (OSTI)

grid is critical to taking advantage of green energy," Smitherman said. "Resources like hydro and wind Environmental Hydro Project Activity Technology & Equipment Dams & Civil Structures Regulation & Policy Tenders & Notices World Regions Welcome to HydroWorld.com! Breaking News: Hydro Currents http

Neff, Jason

415

Modeling Wet Snow Accretion on Power Lines: Improvements to Previous Methods Using 50 Years of Observations  

Science Conference Proceedings (OSTI)

Methods to model wet snow accretion on structures are developed and improved, based on unique records of wet snow icing events as well as large datasets of observed and simulated weather. Hundreds of observed wet snow icing events are logged in ...

Bjrn Egil Kringlebotn Nygaard; Hlfdn gstsson; Katalin Somfalvi-Tth

2013-10-01T23:59:59.000Z

416

Modeling Wet Snow Accretion on Power Lines: Improvements to Previous Methods Using 50 Years of Observations  

Science Conference Proceedings (OSTI)

Methods to model wet snow accretion on structures are developed and improved, based on unique records of wet snow icing events as well as large datasets of observed and simulated weather. Hundreds of observed wet snow icing events are logged in ...

Bjrn Egil Kringlebotn Nygaard; Hlfdn gstsson; Katalin Somfalvi-Tth

417

Performance analysis of different checkpointing and recovery schemes using stochastic model  

Science Conference Proceedings (OSTI)

Several schemes for checkpointing and rollback recovery have been reported in the literature. In this paper, we analyze some of these schemes under a stochastic model. We have derived expressions for average cost of checkpointing, rollback recovery, ... Keywords: checkpointing, message logging, performance evaluation, rollback recovery

Partha Sarathi Mandal; Krishnendu Mukhopadhyaya

2006-01-01T23:59:59.000Z

418

3D geological modelling from boreholes, cross-sections and geological maps, application over former natural gas storages in coal mines  

Science Conference Proceedings (OSTI)

In a wide range of applications involving geological modelling, geological data available at low cost usually consist of documents such as cross-sections or geological maps and punctual data like borehole logs or outcrop descriptions. In order to build ... Keywords: 3D geological modelling, Data structuration, GIS, Geomodeler

Olivier Kaufmann; Thierry Martin

2008-03-01T23:59:59.000Z

419

Five forest harvesting simulation models, part 1: modeling characteristics  

SciTech Connect

This paper is the first of two describing the conclusions from a study to determine the state of the art in timber harvesting computer simulation modeling. Five models were evaluated -- Forest Harvesting Simulation Model (FHSM), Full Tree Field Chipping (FTFC), Harvesting System Simulator (HSS), Simulation Applied to Logging Systems (SAPLOS), and Timber Harvesting and Transport Simulator (THATS) -- for their potential use in southern forest harvesting operations. In Part I, modeling characteristics and overall model philosophy are identified and illustrated. This includes a detailed discussion of the wood flow process in each model, accounting strategies for productive/non-productive times, performance variables, and the different types of harvesting systems modelable. In Part II we discuss user implementation problems. Those dealt with in detail are: What questions can be asked of the model. What are the modeling tradeoffs, and how do they impact on the analysis. What are the computer skills necessary to effectively work with the model. What computer support is needed. Are the models operational. The results provide a good picture of the state of the art in timber harvesting computer simulation. Much learning has occurred in the generation of these models, and many modeling and implementation problems have been uncovered, some of which remain unsolved. Hence, the user needs to examine closely the model and the intended application so that results will represent usable, valid data. It is recommended that the development of timber harvesting computer simulation modeling continue, so that existing and proposed timber harvesting strategies can be adequately evaluated. A set of design criteria are proposed. (Refs. 21).

Goulet, D.V.; Iff, R.H.; Sirois, D.L.

1980-01-01T23:59:59.000Z

420

GEO-ENGINEERING MODELING THROUGH INTERNET INFORMATICS (GEMINI)  

Science Conference Proceedings (OSTI)

GEMINI (Geo-Engineering Modeling through Internet Informatics) is a public-domain web application focused on analysis and modeling of petroleum reservoirs and plays (http://www.kgs.ukans.edu/Gemini/index.html). GEMINI creates a virtual project by ''on-the-fly'' assembly and analysis of on-line data either from the Kansas Geological Survey or uploaded from the user. GEMINI's suite of geological and engineering web applications for reservoir analysis include: (1) petrofacies-based core and log modeling using an interactive relational rock catalog and log analysis modules; (2) a well profile module; (3) interactive cross sections to display ''marked'' wireline logs; (4) deterministic gridding and mapping of petrophysical data; (5) calculation and mapping of layer volumetrics; (6) material balance calculations; (7) PVT calculator; (8) DST analyst, (9) automated hydrocarbon association navigator (KHAN) for database mining, and (10) tutorial and help functions. The Kansas Hydrocarbon Association Navigator (KHAN) utilizes petrophysical databases to estimate hydrocarbon pay or other constituent at a play- or field-scale. Databases analyzed and displayed include digital logs, core analysis and photos, DST, and production data. GEMINI accommodates distant collaborations using secure password protection and authorized access. Assembled data, analyses, charts, and maps can readily be moved to other applications. GEMINI's target audience includes small independents and consultants seeking to find, quantitatively characterize, and develop subtle and bypassed pays by leveraging the growing base of digital data resources. Participating companies involved in the testing and evaluation of GEMINI included Anadarko, BP, Conoco-Phillips, Lario, Mull, Murfin, and Pioneer Resources.

W. Lynn Watney; John H. Doveton

2004-05-13T23:59:59.000Z

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421

INTEGRATED APPROACH FOR THE PETROPHYSICAL INTERPRETATION OF POST-AND PRE-STACK 3-D SEISMIC DATA, WELL-LOG DATA, CORE DATA, GEOLOGICAL INFORMATION AND RESERVOIR PRODUCTION DATA VIA BAYESIAN STOCHASTIC INVERSION  

SciTech Connect

The present report summarizes the work carried out between September 30, 2000 and September 30, 2004 under DOE research contract No. DE-FC26-00BC15305. During the three-year project period, we carried out extensive studies on the inversion post-stack and pre-stack data together with well logs, petrophysical information and fluid flow data. We have achieved all the project goals including development of algorithm for joint inversion of pre-stack seismic data, well logs, and time records of fluid production measurements using stochastic inversion algorithms which were demonstrated on realistic synthetic and field data. Our accomplishments are: (1) Joint inversion of post-stack seismic, well log, fluid flow, and petrophysical data: we demonstrated the technique with application to data from the Gulf of Mexico. (2) Development of a robust pre-stack full waveform inversion algorithm: A new approach based on iteration-adaptive regularization that makes use of plane wave transformed seismic data, was developed and applied to OBC dataset from the Gulf of Thailand. The algorithm was also implemented on a cluster of personal computers. (3) Joint inversion of pre-stack seismic and well-log data: A new stochastic optimization algorithm that makes use of the essential features of seismic and well log data was developed and tested on realistic synthetic dataset. (4) Joint inversion of pre-stack seismic and fluid flow data: A novel technique was developed to optimally combine seismic and flow data. The technique makes very realistic estimate of porosity; sensitivity of the flow parameters to two disparate datasets was studied extensively. (5) Direct estimation of petrophysical parameters from seismic data: The pre-stack waveform inversion was modified to invert directly for porosity and saturation using the Biot-Gassmann equation at each iteration step. The final report contains abridged versions of some of our inventions. The works resulted in several peer-reviewed publications. Five papers have been communicated for peer-reviewed publication, and seven papers were presented at conferences. All of these publications and presentations stemmed from work directly related to the goals of our DOE project.

Carlos Torres-Verdin; Mrinal K. Sen

2004-09-01T23:59:59.000Z

422

Reprint of "3D geological modelling from boreholes, cross-sections and geological maps, application over former natural gas storages in coal mines" [Comput. Geosci. 34 (2008) 278-290  

Science Conference Proceedings (OSTI)

In a wide range of applications involving geological modelling, geological data available at low cost usually consist of documents such as cross-sections or geological maps and punctual data like borehole logs or outcrop descriptions. In order to build ... Keywords: 3D geological modelling, Data structuration, GIS, Geomodeler

Olivier Kaufmann; Thierry Martin

2009-01-01T23:59:59.000Z

423

Depletion modeling of liquid dominated geothermal reservoirs  

DOE Green Energy (OSTI)

Depletion models for liquid-dominated geothermal reservoirs are derived and presented. The depletion models are divided into two categories: confined and unconfined. For both cases depletion models with no recharge (or influx), and depletion models including recharge, are used to match field data from the Svartsengi high temperature geothermal field in Iceland. The influx models included with the mass and energy balances are adopted from the petroleum engineering literature. The match to production data from Svartsengi is improved when influx was included. The Schilthuis steady-state influx gives a satisfactory match. The finite aquifer method of Fetkovitch, and the unsteady state method of Hurst gave reasonable answers, but not as good. The best match is obtained using Hurst simplified solution when lambda = 1.3 x 10{sup -4} m{sup -1}. From the match the cross-sectional area of the aquifer was calculated as 3.6 km{sup 2}. The drawdown was predicted using the Hurst simplified method, and compared with predicted drawdown from a boiling model and an empirical log-log model. A large difference between the models was obtained. The predicted drawdown using the Hurst simplified method falls between the other two. Injection has been considered by defining the net rate as being the production rate minus the injection rate. No thermal of transient effects were taken into account. Prediction using three different net rates shows that the pressure can be maintained using the Hurst simplified method if there is significant fluid reinjection. 32 refs., 44 figs., 2 tabs.

Olsen, G.

1984-06-01T23:59:59.000Z

424

Integrated Analysis and Application of Reservoir Models to Early Permian Detrital Carbonate Deposits, Midland Basin, Texas  

E-Print Network (OSTI)

A 3-D seismic volume, wireline logs and core data were integrated to determine the spatial distribution of porous reservoirs within the Wolfcampian-Leonardian detrital carbonate slope and basin strata in Glasscock County, Texas. A 3-D seismic amplitude volume was used to construct a seismic facies analysis of the detrital carbonate section, and generated attribute volumes helped identify detrital carbonate depositional trends, as well as establish a potential correlation between thick detrital carbonate intervals and associated amplitude response. Eight lithofacies were identified in core and were subsequently classified into three main facies: debris flow, grain flow/turbidite, and basinal shale. A facies type log was then created, which was used to supervise the creation of facies logs within other wells to ultimately use in the creation of a 3-D facies model. Cross sections through the study area show an increase in bathymetric relief beginning in Wolfcampian time and continuing through the Leonardian. Detrital carbonate deposition increases dramatically during the Leonardian, consisting of large gravity flows deposited basinward in a northwest-southeast linear trend, rapidly thinning basinward. Individual flows are discontinuous and bounded by basinal shale facies. Four seismic facies were identified within the interval of interest using a structurally smoothed attribute volume, while an RMS amplitude attribute volume provided a correlation between high RMS amplitude values and detrital carbonate thickness. A high RMS amplitude value corresponding to the debris flow facies was extracted from the RMS attribute volume in the form of a seismic geobody. Two facies models and one porosity model were generated by using upscaled values from the gamma ray, total porosity, and lithofacies logs, which were applied over areas with the densest well control. Although the facies model populated from upscaled GR values was useful in stratigraphic interpretation, it is determined that the models should be applied over areas with denser well spacing in order to provide a more accurate and geologically viable subsurface model.

Johnston, Travis 1987-

2012-12-01T23:59:59.000Z

425

HST STIS Ultraviolet Spectral Evidence of Outflow in Extreme Narrow-line Seyfert 1 Galaxies: II. Modeling and Interpretation  

E-Print Network (OSTI)

We present modeling to explore the conditions of the broad-line emitting gas in two extreme Narrow-line Seyfert 1 galaxies, using the observational results described in the first paper of this series. Photoionization modeling using Cloudy was conducted for the broad, blueshifted wind lines and the narrow, symmetric, rest-wavelength-centered disk lines separately. A broad range of physical conditions were explored for the wind component, and a figure of merit was used to quantitatively evaluate the simulation results. Of the three minima in the figure-of-merit parameter space, we favor the solution characterized by an X-ray weak continuum, elevated abundances, a small column density (log(N_H)\\approx 21.4), relatively high ionization parameter (log(U)\\approx -1.2 - -0.2), a wide range of densities (log(n)\\approx 7 - 11), and a covering fraction of ~0.15. The presence of low-ionization emission lines implies the disk component is optically thick to the continuum, and the SiIII]/CIII] ratio implies a density of 10^10 - 10^10.25 cm^-3. A low ionization parameter (log(U)=-3) is inferred for the intermediate-ionization lines, unless the continuum is ``filtered'' through the wind before illuminating the intermediate-line emitting gas, in which case log(U)=-2.1. The location of the emission regions was inferred from the photoionization modeling and a simple ``toy'' dynamical model. A large black hole mass (1.3 x 10^8 M_\\odot) radiating at 11% of the Eddington luminosity is consistent with the kinematics of both the disk and wind lines, and an emission radius of ~10^4 R_S is inferred for both. We compare these results with previous work and discuss implications.

Karen M. Leighly

2004-02-19T23:59:59.000Z

426

Agent-Based Modeling of Intracellular Transport  

E-Print Network (OSTI)

We develop an agent-based model of the motion and pattern formation of vesicles. These intracellular particles can be found in four different modes of (undirected and directed) motion and can fuse with other vesicles. While the size of vesicles follows a log-normal distribution that changes over time due to fusion processes, their spatial distribution gives rise to distinct patterns. Their occurrence depends on the concentration of proteins which are synthesized based on the transcriptional activities of some genes. Hence, differences in these spatio-temporal vesicle patterns allow indirect conclusions about the (unknown) impact of these genes. By means of agent-based computer simulations we are able to reproduce such patterns on real temporal and spatial scales. Our modeling approach is based on Brownian agents with an internal degree of freedom, $\\theta$, that represents the different modes of motion. Conditions inside the cell are modeled by an effective potential that differs for agents dependent on their...

Birbaumer, Mirko; 10.1140/epjb/e2011-20283-x

2011-01-01T23:59:59.000Z

427

Model expert system MES  

Science Conference Proceedings (OSTI)

The comprehensive oil log interpretation is a procedure of numerical calculation and logical (or plausible) inference. In other words, the results of preliminary inference will provide a basis for the choice of parameters of calculation formula, and ...

Guan Jiwen; Xu Ying; Chang Minche; Zhao Jizhi

1985-08-01T23:59:59.000Z

428

Empirical models for Dark Matter Halos. I. Nonparametric Construction of Density Profiles and Comparison with Parametric Models  

E-Print Network (OSTI)

We use techniques from nonparametric function estimation theory to extract the density profiles, and their derivatives, from a set of N-body dark matter halos. We consider halos generated from LCDM simulations of gravitational clustering, as well as isolated, spherical collapses. The logarithmic density slopes gamma = d(log rho)/d(log r) of the LCDM halos are found to vary as power-laws in radius, reaching values of gamma ~ -1 at the innermost resolved radii (~0.01 r_virial). This behavior is significantly different from that of broken power-law models like the NFW profile, but similar to that of models like de Vaucouleurs'. Accordingly, we compare the N-body density profiles with various parametric models to find which provide the best fit. We consider an NFW-like model with arbitrary inner slope; Dehnen & McLaughlin's anisotropic model; Einasto's model (identical in functional form to Sersic's model but fit to the space density); and the density model of Prugniel & Simien that was designed to match the deprojected form of Sersic's R^{1/n} law. Overall, the best-fitting model to the LCDM halos is Einasto's, although the Prugniel-Simien and Dehnen-McLaughlin models also perform well. With regard to the spherical collapse halos, both the Prugniel-Simien and Einasto models describe the density profiles well, with an rms scatter some four times smaller than that obtained with either the NFW-like model or the 3-parameter Dehnen-McLaughlin model. Finally, we confirm recent claims of a systematic variation in profile shape with halo mass.

David Merritt; Alister W. Graham; Ben Moore; Juerg Diemand; Balsa Terzic

2005-09-15T23:59:59.000Z

429

Conceptual Model At Coso Geothermal Area (2006) | Open Energy Information  

Open Energy Info (EERE)

6) 6) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Conceptual Model Activity Date 2006 Usefulness useful DOE-funding Unknown Exploration Basis Determine boiling zones and their relation to production zones by developing a fluid model Notes A fluid model for the Coso geothermal reservoir is developed from Fluid Inclusion Stratigraphy (FIS) analyses. Fluid inclusion gas chemistry in well cuttings collected at 20 ft intervals is analyzed and plotted on well log diagrams. Models are created using cross-sections and fence diagrams. References Dilley, L.M.; Norman, D.I.; Moore, J.; McCullouch, J. (1 January 2006) FLUID STRATIGRAPHY OF THE COSO GEOTHERMAL RESERVOIR Retrieved from "http://en.openei.org/w/index.php?title=Conceptual_Model_At_Coso_Geothermal_Area_(2006)&oldid=473688

430

Results of investigation at the Miravalles Geothermal Field, Costa Rica: Part 1, Well logging. Resultados de las investigaciones en el campo geotermico de Miravalles, Costa Rica: Parte 1, Registros de pozos  

DOE Green Energy (OSTI)

The well-logging operations performed in the Miravalles Geothermal Field in Costa Rica were conducted during two separate field trips. The Phase I program provided the deployment of a suite of high-temperature borehole instruments, including the temperature/rabbit, fluid sampler, and three-arm caliper in Well PGM-3. These same tools were deployed in Well PGM-10 along with an additional survey run with a combination fluid velocity/temperature/pressure instrument used to measure thermodynamic properties under flowing well conditions. The Phase II program complemented Phase I with the suite of tools deployed in Wells PGM-5, PGM-11, and PGM-12. 4 refs., 25 figs., 1 tab.

Dennis, B.R.; Lawton, R.G.; Kolar, J.D.; Alvarado, A.

1989-03-01T23:59:59.000Z

431

$^7$Li Abundances in Halo Stars: Testing Stellar Evolution Models and the Primordial $^7$Li Abundance  

E-Print Network (OSTI)

A large number of stellar evolution models with [Fe/H] = -2.3 and -3.3 have been calculated in order to determine the primordial $^7$Li abundance and to test current stellar evolution models by a comparison to the extensive database of Li abundances in extremely metal poor halo stars observed by Thorburn (1994). Standard models do a good job of fitting the observed Li abundances in stars hotter than 5600 K. They predict a primordial $^7$Li abundance of Log N(Li) = 2.24\\pm 0.03$. Models which include microscopic diffusion predict a downward curvature in the $^7$Li destruction isochrones at hot temperatures which is not present in the observations. Thus, the observations clearly rule out models which include uninhibited microscopic diffusion of $^7$Li from the surface of the star. The [Fe/H] = -2.3 stellar models which include both diffusion and rotational mixing provide an excellent match to the observations. Both the plateau stars and the heavily depleted cool stars are well fit by these models. The rotational mixing leads to considerable $^7$Li depletion in these models and the primordial $^7$Li abundance inferred from these models is Log N(Li) = $3.08\\pm 0.1$.

Brian Chaboyer; P. Demarque

1994-03-21T23:59:59.000Z

432

A fracture network model for water flow and solute transport  

DOE Green Energy (OSTI)

This paper summarizes code development work and sample calculations for FRACNET, a two-dimensional steady state simulator of fluid flow and solute transport in fractured porous media. The model analyzes flow and transport by generating a fracture network based on statistical characteristics of fractures obtained from well logs and other data. After a network is generated, flow and tracer transport are computed for appropriate boundary conditions and wellbore source/sink terms. In addition, for a given realization, the code can be used to indicate whether the medium can be treated as an equivalent porous medium. 18 refs., 7 figs.

Robinson, B.A.

1989-01-01T23:59:59.000Z

433

Yunnan-III models for Evolutionary population synthesis  

E-Print Network (OSTI)

We build the Yunnan-III evolutionary population synthesis (EPS) models by using the MESA stellar evolution code, BaSeL stellar spectra library and the initial mass functions (IMFs) of Kroupa and Salpeter, and present colours and integrated spectral energy distributions (ISEDs) of solar-metallicity stellar populations (SPs) in the range of 1Myr-15 Gyr. The main characteristic of the Yunnan-III EPS models is the usage of a set of self-consistent solar-metallicity stellar evolutionary tracks (the masses of stars are from 0.1 to 100Msun). This set of tracks is obtained by using the state-of-the-art MESA code. MESA code can evolve stellar models through thermally pulsing asymptotic giant branch (TP-AGB) phase for low- and intermediate-mass stars. By comparisons, we confirm that the inclusion of TP-AGB stars make the V-K, V-J and V-R colours of SPs redder and the infrared flux larger at ages log(t/yr)>7.6 (the differences reach the maximum at log(t/yr)~8.6, ~0.5-0.2mag for colours, ~2 times for K-band flux). The st...

Zhang, F; Han, Z; Zhuang, Y; Kang, X

2012-01-01T23:59:59.000Z

434

Correlated Resource Models of Internet End Hosts  

E-Print Network (OSTI)

Understanding and modelling resources of Internet end hosts is essential for the design of desktop software and Internet-distributed applications. In this paper we develop a correlated resource model of Internet end hosts based on real trace data taken from the SETI@home project. This data covers a 5-year period with statistics for 2.7 million hosts. The resource model is based on statistical analysis of host computational power, memory, and storage as well as how these resources change over time and the correlations between them. We find that resources with few discrete values (core count, memory) are well modeled by exponential laws governing the change of relative resource quantities over time. Resources with a continuous range of values are well modeled with either correlated normal distributions (processor speed for integer operations and floating point operations) or log-normal distributions (available disk space). We validate and show the utility of the models by applying them to a resource allocation ...

Heien, Eric M; David, Anderson

2010-01-01T23:59:59.000Z

435

Modeling and Analysis of Oligonucleotide Microarray Data for Pathogen Detection  

E-Print Network (OSTI)

function for log ratio data, using a B-spline basis with 13weighted sums of cubic B-spline basis functions, evaluatedM ? log where F is an n? B-spline basis matrix with F iak =

McLoughlin, Kevin Shane

2013-01-01T23:59:59.000Z

436

Quantum Circuit Model Topological Model  

E-Print Network (OSTI)

Quantum Circuit Model Topological Model Comparison of Models Topological Quantum Computation Eric Rowell Texas A&M University October 2010 Eric Rowell Topological Quantum Computation #12;Quantum Circuit Model Topological Model Comparison of Models Outline 1 Quantum Circuit Model Gates, Circuits

Rowell, Eric C.

437

NETL F 451.1-1/1 Categorical Exclusion (CX) Designation Form  

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

Log Porosity and Saturations from Mud Logs and Drilling Rates Using Artificial Intelligence Develop a model to predict conventional log porosities and saturations in the...

438

Labelled tree sequents, Tree hypersequents and Nested (Deep) Sequents  

E-Print Network (OSTI)

model yields the linear trend log W(s) + log s + log C, (33) where + is simply obtained via a standard

Goré, Rajeev

439

Ranking entities using web search query logs  

Science Conference Proceedings (OSTI)

Searching for entities is an emerging task in Information Retrieval for which the goal is finding well defined entities instead of documents matching the query terms. In this paper we propose a novel approach to Entity Retrieval by using Web search engine ...

Bodo Billerbeck; Gianluca Demartini; Claudiu S. Firan; Tereza Iofciu; Ralf Krestel

2010-09-01T23:59:59.000Z

440

Advertise Subscribe Log in Register Advanced search  

E-Print Network (OSTI)

fusion reactor. The European Parliament today approved !650 million in additional funding to cover cost overruns at the international nuclear fusion project, ITER. In December, MEPs and EU member states agreed in principle to cover !1.3 billion in additional costs for the reactor in 2012-13. The vote in Strasbourg today

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


441

All public logs | Open Energy Information  

Open Energy Info (EERE)

28 June 2013 Rmckeel (Talk | contribs) automatically marked revision 643989 of page Test patrolled 14:09, 28 June 2013 Rmckeel (Talk | contribs) deleted page Category:Ryan's...

442

Microsoft Word - FOIA Log FY 2004.doc  

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

their agents or representatives. Yes 060204 004 060104 060604 Transfer from Hanford Copies of responsive agency records (1) DOE, 1999a, Letter, PG. Loscoe, DOE-RL, to...

443

Definition: Tlr Log | Open Energy Information  

Open Energy Info (EERE)

is electronically filed in a public area of the NERC Web site.1 References Glossary of Terms Used in Reliability Standards An LikeLike UnlikeLike You like this.Sign Up...

444

Methane Hydrates - Mt. Elbert Well Log Data  

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

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

445

Accessing Pathway Logging in to Pathway  

E-Print Network (OSTI)

the appropriate semester appears in the Select a Term box and click the yellow Continue button. 4. Search. Type in an answer to the question and press Enter 3. Click the Continue Button b. Now you must set be based on a word in the dictionary, or any UM/campus related terms (like UMKC or Roo) 3. cannot be based

Zeng, Yong - Department of Mathematics and Statistics, University of Missouri

446

Definition: Well Log Techniques | Open Energy Information  

Open Energy Info (EERE)

Clean Energy Analysis Low Emission Development Strategies Oil & Gas Smart Grid Solar U.S. OpenLabs Utilities Water Wind Page Actions View form View source History View...

447

Aether: a scalable approach to logging  

Science Conference Proceedings (OSTI)

The shift to multi-core hardware brings new challenges to database systems, as the software parallelism determines performance. Even though database systems traditionally accommodate simultaneous requests, a multitude of synchronization barriers serialize ...

Ryan Johnson; Ippokratis Pandis; Radu Stoica; Manos Athanassoulis; Anastasia Ailamaki

2010-09-01T23:59:59.000Z

448

All public logs | Open Energy Information  

Open Energy Info (EERE)

May 2013 Brianlips (Talk | contribs) set 609444 as the approved revision for "Multifamily Energy Savings Program (Existing Buildings and New Construction) (Wisconsin)" 13:17, 24...

449

NEW ATLAS9 AND MARCS MODEL ATMOSPHERE GRIDS FOR THE APACHE POINT OBSERVATORY GALACTIC EVOLUTION EXPERIMENT (APOGEE)  

Science Conference Proceedings (OSTI)

We present a new grid of model photospheres for the SDSS-III/APOGEE survey of stellar populations of the Galaxy, calculated using the ATLAS9 and MARCS codes. New opacity distribution functions were generated to calculate ATLAS9 model photospheres. MARCS models were calculated based on opacity sampling techniques. The metallicity ([M/H]) spans from -5 to 1.5 for ATLAS and -2.5 to 0.5 for MARCS models. There are three main differences with respect to previous ATLAS9 model grids: a new corrected H{sub 2}O line list, a wide range of carbon ([C/M]) and {alpha} element [{alpha}/M] variations, and solar reference abundances from Asplund et al. The added range of varying carbon and {alpha}-element abundances also extends the previously calculated MARCS model grids. Altogether, 1980 chemical compositions were used for the ATLAS9 grid and 175 for the MARCS grid. Over 808,000 ATLAS9 models were computed spanning temperatures from 3500 K to 30,000 K and log g from 0 to 5, where larger temperatures only have high gravities. The MARCS models span from 3500 K to 5500 K, and log g from 0 to 5. All model atmospheres are publicly available online.

Meszaros, Sz.; Allende Prieto, C.; De Vicente, A. [Instituto de Astrofisica de Canarias (IAC), E-38200 La Laguna, Tenerife (Spain); Edvardsson, B.; Gustafsson, B. [Department of Physics and Astronomy, Division of Astronomy and Space Physics, Box 515, SE-751 20 Uppsala (Sweden); Castelli, F. [Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Trieste, via Tiepolo 11, I-34143 Trieste (Italy); Garcia Perez, A. E.; Majewski, S. R. [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904-4325 (United States); Plez, B. [Laboratoire Univers et Particules de Montpellier, Universite Montpellier 2, CNRS, F-34095 Montpellier (France); Schiavon, R. [Gemini Observatory, 670 North A'ohoku Place, Hilo, HI 96720 (United States); Shetrone, M. [McDonald Observatory, University of Texas, Austin, TX 78712 (United States)

2012-10-01T23:59:59.000Z

450

Modelling environmental risk  

Science Conference Proceedings (OSTI)

As environmental issues have become increasingly important in economic research and policy for sustainable development, firms in the private sector have introduced environmental and social issues in conducting their business activities. Such behaviour ... Keywords: Asymmetry, Conditional volatility, Dow Jones Sustainability Indexes, Environmental risk, Environmental sustainability index, GARCH, GJR, Log-moment condition, Moment condition, Persistence, Shocks

Suhejla Hoti; Michael McAleer; Laurent L. Pauwels

2005-10-01T23:59:59.000Z

451

Comparison of models for predicting landfill methane recovery. Final report  

DOE Green Energy (OSTI)

Landfill methane models are tools used to project methane generation over time from a mass of landfilled waste. These models are used for sizing landfill gas (LFG) collection systems, evaluations and projections of LFG energy uses, and regulatory purposes. The objective of this project was to select various landfill methane models and to provide a comparison of model outputs to actual long-term gas recovery data from a number of well managed and suitable landfills. Another objective was to use these data to develop better estimates of confidence limits that can be assigned to model projections. This project assessed trial model forms against field data from available landfills where methane extraction was maximized, waste filling history was well-documented, and other pertinent site information was of superior quality. Data were obtained from 18 US landfills. Four landfill methane models were compared: a zero-order, a simple first order, a modified first order, and a multi-phase first order model. Models were adjusted for best fit to field data to yield parameter combinations based on the minimized residual errors between predicted and experienced methane recovery. The models were optimized in this way using two data treatments: absolute value of the differences (arithmetic error minimization) and absolute value of the natural log of the ratios (logarithmic error minimization).

Vogt, W.G. [SCS Engineers, Reston, VA (United States); Augenstein, D. [Institute for Environmental Management, Palo Alto, CA (United States)

1997-03-01T23:59:59.000Z

452

Uranium favorability of tertiary sedimentary rocks of the Pend Oreille River valley, Washington. [Measurement and sampling of surface sections, collection of samples from isolated outcrops, chemical and mineralogical analyses of samples, and examination of available water logs  

SciTech Connect

Tertiary sedimentary rocks in the Pend Oreille River valley were investigated in a regional study to determine the favorability for potential uranium resources of northeastern Washington. This project involved measurement and sampling of surface sections, collection of samples from isolated outcrops, chemical and mineralogical analyses of samples, and examination of available water well logs. The Box Canyon Dam area north of Ione is judged to have very high favorability. Thick-bedded conglomerates interbedded with sandstones and silty sandstones compose the Tiger Formation in this area, and high radioactivity levels are found near the base of the formation. Uranophane is found along fracture surfaces or in veins. Carbonaceous material is present throughout the Tiger Formation in the area. Part of the broad Pend Oreille valley surrounding Cusick, Washington, is an area of high favorability. Potential host rocks in the Tiger Formation, consisting of arkosic sandstones interbedded with radioactive shales, probably extend throughout the subsurface part of this area. Carbonaceous material is present and some samples contain high concentrations of uranium. In addition, several other possible chemical indicators were found. The Tiger-Lost Creek area is rated as having medium favorability. The Tiger Formation contains very hard, poorly sorted granite conglomerate with some beds of arkosic sandstone and silty sandstone. The granite conglomerate was apparently derived from source rocks having relatively high uranium content. The lower part of the formation is more favorable than the upper part because of the presence of carbonaceous material, anomalously high concentrations of uranium, and other possible chemical indicators. The area west of Ione is judged to have low favorability, because of the very low permeability of the rocks and the very low uranium content. (auth)

Marjaniemi, D.K.; Robins, J.W.

1975-08-01T23:59:59.000Z

453

Model Validation  

Science Conference Proceedings (OSTI)

...thus establishing appropriate and important benchmarks. Benchmarking can go beyond validation and also measure relative computational speed, accuracy, and breadth for available modeling approaches and implementations, providing valuable information for users to discern the best models and for modelers...

454

Modeling & Simulation  

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

Modeling & Simulation Modeling & Simulation Research into alternative forms of energy, especially energy security, is one of the major national security imperatives of this...

455

Checking UML Model Consistency A. Baruzzo1  

E-Print Network (OSTI)

nodes is spread over an area A and each possible connection has capacity W . Also, assume is a guard) where )( mFC is the number of nodes in the set relative to node m . )(log ),(log),( ),( m Fk tktk tm FC

Comini, Marco

456

Modeling-Computer Simulations At Fish Lake Valley Area (Deymonaz, Et Al.,  

Open Energy Info (EERE)

Modeling-Computer Simulations At Fish Lake Valley Area (Deymonaz, Et Al., Modeling-Computer Simulations At Fish Lake Valley Area (Deymonaz, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Fish Lake Valley Area (Deymonaz, Et Al., 2008) Exploration Activity Details Location Fish Lake Valley Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes (4) synthesis of geologic mapping results and lithologic logs for 3_D geologic characterization of the prospect area; (5) compilation of relevant data from the foregoing sub_activities into a Geographic Information Systems (GIS) database for visualization and mapping, and to facilitate the development of an exploration model; and (6) development of a refined

457

Joint inversion of marine seismic AVA and CSEM data using statistical rock-physics models and Markov random fields: Stochastic inversion of AVA and CSEM data  

SciTech Connect

Joint inversion of seismic AVA and CSEM data requires rock-physics relationships to link seismic attributes to electrical properties. Ideally, we can connect them through reservoir parameters (e.g., porosity and water saturation) by developing physical-based models, such as Gassmanns equations and Archies law, using nearby borehole logs. This could be difficult in the exploration stage because information available is typically insufficient for choosing suitable rock-physics models and for subsequently obtaining reliable estimates of the associated parameters. The use of improper rock-physics models and the inaccuracy of the estimates of model parameters may cause misleading inversion results. Conversely, it is easy to derive statistical relationships among seismic and electrical attributes and reservoir parameters from distant borehole logs. In this study, we develop a Bayesian model to jointly invert seismic AVA and CSEM data for reservoir parameter estimation using statistical rock-physics models; the spatial dependence of geophysical and reservoir parameters are carried out by lithotypes through Markov random fields. We apply the developed model to a synthetic case, which simulates a CO{sub 2} monitoring application. We derive statistical rock-physics relations from borehole logs at one location and estimate seismic P- and S-wave velocity ratio, acoustic impedance, density, electrical resistivity, lithotypes, porosity, and water saturation at three different locations by conditioning to seismic AVA and CSEM data. Comparison of the inversion results with their corresponding true values shows that the correlation-based statistical rock-physics models provide significant information for improving the joint inversion results.

Chen, J.; Hoversten, G.M.

2011-09-15T23:59:59.000Z

458

Context: Modeling  

Science Conference Proceedings (OSTI)

... Yang, JC; Huber, ML; Boyer, CI; 1995. Modeling of Hydrogen Fluoride Formation From Flame Suppressants During Combustion.. ...

2013-05-03T23:59:59.000Z

459

Modeling Portal  

Science Conference Proceedings (OSTI)

... News And Events. 24th NIST Computer Modeling Workshop. New Quantum Computing Algorithm Could Simulate Giant Particle Accelerators. ...

2011-02-14T23:59:59.000Z

460

DISTRIBUTION AND RANGE OF RADIONUCLIDE SORPTION COEFFICIENTS IN A SAVANNAH RIVER SITE SUBSURFACE: STOCHASTIC MODELING CONSIDERATIONS  

SciTech Connect

The uncertainty associated with the sorption coefficient, or K{sub d} value, is one of the key uncertainties in estimating risk associated with burying low-level nuclear waste in the subsurface. The objective of this study was to measure >648 K{sub d} values and provide a measure of the range and distribution (normal or log-normal) of radionuclide K{sub d} values appropriate for the E-Area disposal site, within the Savannah River Site, near Aiken South Carolina. The 95% confidence level for the mean K{sub d} was twice the mean in the Aquifer Zone (18-30.5 m depth), equal to the mean for the Upper Vadose Zone (3.3-10 m depth), and half the mean for the Lower Vadose Zone (3.10-18 m depth). The distribution of K{sub d} values was log normal in the Upper Vadose Zone and Aquifer Zone, and normal in the Lower Vadose Zone. To our knowledge, this is the first report of natural radionuclide Kd variability in the literature. Using ranges and distribution coefficients that are specific to the hydrostratigraphic unit improved model accuracy and reduced model uncertainty. Unfortunately, extension of these conclusions to other sites is likely not appropriate given that each site has its own sources of hydrogeological variability. However, this study provides one of the first examples of the development stochastic ranges and distributions of K{sub d} values for a hydrological unit for stochastic modeling.

Kaplan, D.; et. al

2010-01-11T23:59:59.000Z

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


461

Model atmospheres for M (sub)dwarfs; 1, the base model grid  

E-Print Network (OSTI)

We have calculated a grid of more than 700 model atmospheres valid for a wide range of parameters encompassing the coolest known M~dwarfs M~subdwarfs and brown dwarf candidates: 1500\\le \\teff \\le 4000\\,K, 3.5\\le \\log(g)\\le 5.5, and -4.0\\le { [M/H]}\\le +0.5. Our equation of state includes 105 molecules and up to 27 ionization stages of 39 elements. In the calculations of the base grid of model atmospheres presented here, we include over 300 molecular bands of 4 molecules (TiO, VO, CaH, FeH) in the JOLA approximation, the water opacity of Ludwig (1971), collision induced opacities, b-f and f-f atomic processes, as well as about 2 million spectral lines selected from a list with more than 42 million atomic and 24 million molecular (H_2, CH, NH, OH, MgH, SiH, C_2, CN, CO, SiO) lines. High-resolution synthetic spectra are obtained using an opacity sampling method. The model atmospheres and spectra are calculated with the generalized stellar atmosphere code PHOENIX, assuming LTE, plane-parallel geometry, energy (ra...

Hauschildt, P H

1996-01-01T23:59:59.000Z

462

Petrophysical evaluation of subterranean formations  

DOE Patents (OSTI)

Methods and systems are provided for evaluating petrophysical properties of subterranean formations and comprehensively evaluating hydrate presence through a combination of computer-implemented log modeling and analysis. Certain embodiments include the steps of running a number of logging tools in a wellbore to obtain a variety of wellbore data and logs, and evaluating and modeling the log data to ascertain various petrophysical properties. Examples of suitable logging techniques that may be used in combination with the present invention include, but are not limited to, sonic logs, electrical resistivity logs, gamma ray logs, neutron porosity logs, density logs, NRM logs, or any combination or subset thereof.

Klein, James D; Schoderbek, David A; Mailloux, Jason M

2013-05-28T23:59:59.000Z

463

Conceptual Model Summary Report Simulation Framework for Regional Geologic CO{sub 2} Storage Along Arches Province of Midwestern United States  

Science Conference Proceedings (OSTI)

A conceptual model was developed for the Arches Province that integrates geologic and hydrologic information on the Eau Claire and Mt. Simon formations into a geocellular model. The conceptual model describes the geologic setting, stratigraphy, geologic structures, hydrologic features, and distribution of key hydraulic parameters. The conceptual model is focused on the Mt. Simon sandstone and Eau Claire formations. The geocellular model depicts the parameters and conditions in a numerical array that may be imported into the numerical simulations of carbon dioxide (CO{sub 2}) storage. Geophysical well logs, rock samples, drilling logs, geotechnical test results, and reservoir tests were evaluated for a 500,000 km{sup 2} study area centered on the Arches Province. The geologic and hydraulic data were integrated into a three-dimensional (3D) grid of porosity and permeability, which are key parameters regarding fluid flow and pressure buildup due to CO{sub 2} injection. Permeability data were corrected in locations where reservoir tests have been performed in Mt. Simon injection wells. The final geocellular model covers an area of 600 km by 600 km centered on the Arches Province. The geocellular model includes a total of 24,500,000 cells representing estimated porosity and permeability distribution. CO{sub 2} injection scenarios were developed for on-site and regional injection fields at rates of 70 to 140 million metric tons per year.

None

2011-06-30T23:59:59.000Z

464

Numerical Modeling  

Science Conference Proceedings (OSTI)

Feb 28, 2011... or field repair, durability, weight and cost efficiency, and extreme climate. ... Cohesive zone model is implemented to investigate the interfacial...

465

PREDICTIVE MODELS  

Science Conference Proceedings (OSTI)

PREDICTIVE MODELS is a collection of five models - CFPM, CO2PM, ICPM, PFPM, and SFPM - used in the 1982-1984 National Petroleum Council study of enhanced oil recovery (EOR) potential. Each pertains to a specific EOR process designed to squeeze additional oil from aging or spent oil fields. The processes are: 1) chemical flooding; 2) carbon dioxide miscible flooding; 3) in-situ combustion; 4) polymer flooding; and 5) steamflood. CFPM, the Chemical Flood Predictive Model, models micellar (surfactant)-polymer floods in reservoirs, which have been previously waterflooded to residual oil saturation. Thus, only true tertiary floods are considered. An option allows a rough estimate of oil recovery by caustic or caustic-polymer processes. CO2PM, the Carbon Dioxide miscible flooding Predictive Model, is applicable to both secondary (mobile oil) and tertiary (residual oil) floods, and to either continuous CO2 injection or water-alternating gas processes. ICPM, the In-situ Combustion Predictive Model, computes the recovery and profitability of an in-situ combustion project from generalized performance predictive algorithms. PFPM, the Polymer Flood Predictive Model, is switch-selectable for either polymer or waterflooding, and an option allows the calculation of the incremental oil recovery and economics of polymer relative to waterflooding. SFPM, the Steamflood Predictive Model, is applicable to the steam drive process, but not to cyclic steam injection (steam soak) processes. The IBM PC/AT version includes a plotting capability to produces a graphic picture of the predictive model results.

Ray, R.M. (DOE Bartlesville Energy Technology Center, Bartlesville, OK (United States))

1988-10-01T23:59:59.000Z

466

Bayesian inference through encompassing priors and importance sampling for a class of marginal models for categorical data  

E-Print Network (OSTI)

We develop a Bayesian approach for selecting the model which is the most supported by the data within a class of marginal models for categorical variables formulated through equality and/or inequality constraints on generalised logits (local, global, continuation or reverse continuation), generalised log-odds ratios and similar higher-order interactions. For each constrained model, the prior distribution of the model parameters is formulated following the encompassing prior approach. Then, model selection is performed by using Bayes factors which are estimated by an importance sampling method. The approach is illustrated through three applications involving some datasets, which also include explanatory variables. In connection with one of these examples, a sensitivity analysis to the prior specification is also considered.

Bartolucci, Francesco; Farcomeni, Alessio

2012-01-01T23:59:59.000Z

467

ISDAC Modeling  

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

Modeling Modeling Modeling of aerosol effects on Arctic stratiform clouds: Preliminary results from the ISDAC case study (poster 13J) Mikhail Ovchinnikov, Steve Ghan, Jiwen Fan, Xiaohong Liu (PNNL), Alexei Korolev, Peter Liu (Env. Canada) Shaocheng Xie (LLNL), Hugh Morrison (NCAR), ISDAC PI's, and members of the CMWG 2 Indirect Semi-Direct Aerosol Campaign Science questions: How do properties of the arctic aerosol during April differ from those measured during the MPACE in October? To what extent do the different properties of the arctic aerosol during April produce differences in the microphysical and macrophysical properties of clouds and the surface energy balance? To what extent can cloud models and the cloud parameterizations used in climate models simulate the sensitivity of arctic clouds and

468

Biosystems Modeling  

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

Biosystems Modeling Biosystems Modeling Phantoms We are a leader nationally and internationally in the development of models and methods for predicting the behavior of radionuclides and chemicals in the body, assessing the health effects of environmental hazards, and determining the exposure-dose relationships for environmental pollutants. Our work has been a key resource to the medical community in providing the basis for dose estimates in nuclear medicine. Our tools and skills are also applicable to the areas of occupational health and safety, public health and safety, radiation protection, environmental dosimetry, and battlefield effects. Our technology base includes mathematical modeling, bone dosimetry, phantom development, and neutron dosimetry. Please direct any questions concerning the Biosystems Modeling Group to:

469

OSPREY Model  

SciTech Connect

The absence of industrial scale nuclear fuel reprocessing in the U.S. has precluded the necessary driver for developing the advanced simulation capability now prevalent in so many other countries. Thus, it is essential to model complex series of unit operations to simulate, understand, and predict inherent transient behavior and feedback loops. A capability of accurately simulating the dynamic behavior of advanced fuel cycle separation processes will provide substantial cost savings and many technical benefits. The specific fuel cycle separation process discussed in this report is the off-gas treatment system. The off-gas separation consists of a series of scrubbers and adsorption beds to capture constituents of interest. Dynamic models are being developed to simulate each unit operation involved so each unit operation can be used as a stand-alone model and in series with multiple others. Currently, an adsorption model has been developed within Multi-physics Object Oriented Simulation Environment (MOOSE) developed at the Idaho National Laboratory (INL). Off-gas Separation and REcoverY (OSPREY) models the adsorption of off-gas constituents for dispersed plug flow in a packed bed under non-isothermal and non-isobaric conditions. Inputs to the model include gas, sorbent, and column properties, equilibrium and kinetic data, and inlet conditions. The simulation outputs component concentrations along the column length as a function of time from which breakthrough data is obtained. The breakthrough data can be used to determine bed capacity, which in turn can be used to size columns. It also outputs temperature along the column length as a function of time and pressure drop along the column length. Experimental data and parameters were input into the adsorption model to develop models specific for krypton adsorption. The same can be done for iodine, xenon, and tritium. The model will be validated with experimental breakthrough curves. Customers will be given access to OSPREY to used and evaluate the model.

Veronica J. Rutledge

2013-01-01T23:59:59.000Z

470

Modeling-Computer Simulations (Ranalli & Rybach, 2005) | Open...  

Open Energy Info (EERE)

Notes re: Heat Flow and Temp Logs References G. Ranalli, L. Rybach (2005) Heat Flow, Heat Transfer And Lithosphere Rheology In Geothermal Areas- Features And Examples...

471

Modeling and analysis of cost-efficient Web advertisement  

E-Print Network (OSTI)

mapping clones Case control consortium type 1 diabetes trend -log10 P-value RefSeq Genes 4q27 BBS7 BBS7

Maguire Jr., Gerald Q.

472

Flow and Solidification Modeling of Al Castings  

Science Conference Proceedings (OSTI)

Readings were data logged into a computer at a rate of 50 per second. ... to the ingate and not that at the geometric center of the plate, which illustrated a useful...

473

Modelling I  

Science Conference Proceedings (OSTI)

Mar 15, 2012 ... Current Distribution and Lorentz Field Modelling Using Cathode Designs: A ... The electrical conductivity of the cathode-block and the collector bar is so ... load, creating a very uneven current distribution within the cathode.

474

PGMA Model  

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

PGMA Model PGMA Model PM-G1-F1-012802.doc Revised January 28, 2002 Page 1 The PGMA (Policy, Guidance, Metrics, Assessments) was originally conceived as a model to provide the framework for developing the components for DOE Information Technology (IT) related policies. Its specific purpose is to drive the development of the four components and ensure a corresponding element within each component. The model components are: POLICY C A concise statement supporting the Department=s needs for quality business solutions. C Link to existing IT policy statements without redundancy. GUIDANCE C Documentation, templates, references, checklists, training, (using Web and other means) to provide implementation mechanisms and techniques for policy adherence.

475

Modelling approaches  

Science Conference Proceedings (OSTI)

Understanding and mitigating risks and threats to critical infrastructures relies heavily on the ability to construct and validate models often involving physical systems or even human intervention. This, together with the wide range of scales from critical ...

Nils Kalstad Svendsen; Stephen D. Wolthusen

2012-01-01T23:59:59.000Z

476

Batteries - Modeling  

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

Battery Modeling Over the last few decades, a broad range of battery technologies have been examined at Argonne for transportation applications. Today the focus is on lithium-ion...

477

Model Atmospheres for M (Sub)Dwarfs: I. The base model grid  

E-Print Network (OSTI)

We have calculated a grid of more than 700 model atmospheres valid for a wide range of parameters encompassing the coolest known M~dwarfs, M~subdwarfs and brown dwarf candidates: $1500\\le \\teff \\le 4000\\,$K, $3.5\\le \\log(g)\\le 5.5$, and $-4.0\\le { [M/H]}\\le +0.5$. Our equation of state includes 105 molecules and up to 27 ionization stages of 39 elements. In the calculations of the base grid of model atmospheres presented here, we include over 300 molecular bands of 4 molecules (TiO, VO, CaH, FeH) in the JOLA approximation, the water opacity of Ludwig (1971), collision induced opacities, b-f and f-f atomic processes, as well as about 2 million spectral lines selected from a list with more than 42 million atomic and 24 million molecular (H$_2$, CH, NH, OH, MgH, SiH, C$_2$, CN, CO, SiO) lines. High-resolution synthetic spectra are obtained using an opacity sampling method. The model atmospheres and spectra are calculated with the generalized stellar atmosphere code PHOENIX, assuming LTE, plane-parallel geometry, energy (radiative plus convective) conservation, and hydrostatic equilibrium. The model spectra give close agreement with observations of M~dwarfs across a wide spectral range from the blue to the near-IR, with one notable exception: the fit to the water bands. We discuss several practical applications of our model grid, e.g., broadband colors derived from the synthetic spectra. In light of current efforts to identify genuine brown dwarfs, we also show how low-resolution spectra of cool dwarfs vary with surface gravity, and how the high-resolution line profile of the Li~I resonance doublet depends on the Li abundance.

France Allard; Peter H. Hauschildt

1996-01-25T23:59:59.000Z

478

PREDICTIVE MODELS  

SciTech Connect

PREDICTIVE MODELS is a collection of five models - CFPM, CO2PM, ICPM, PFPM, and SFPM - used in the 1982-1984 National Petroleum Council study of enhanced oil recovery (EOR) potential. Each pertains to a specific EOR process designed to squeeze additional oil from aging or spent oil fields. The processes are: 1) chemical flooding, where soap-like surfactants are injected into the reservoir to wash out the oil; 2) carbon dioxide miscible flooding, where carbon dioxide mixes with the lighter hydrocarbons making the oil easier to displace; 3) in-situ combustion, which uses the heat from burning some of the underground oil to thin the product; 4) polymer flooding, where thick, cohesive material is pumped into a reservoir to push the oil through the underground rock; and 5) steamflood, where pressurized steam is injected underground to thin the oil. CFPM, the Chemical Flood Predictive Model, models micellar (surfactant)-polymer floods in reservoirs, which have been previously waterflooded to residual oil saturation. Thus, only true tertiary floods are considered. An option allows a rough estimate of oil recovery by caustic or caustic-polymer processes. CO2PM, the Carbon Dioxide miscible flooding Predictive Model, is applicable to both secondary (mobile oil) and tertiary (residual oil) floods, and to either continuous CO2 injection or water-alternating gas processes. ICPM, the In-situ Combustion Predictive Model, computes the recovery and profitability of an in-situ combustion project from generalized performance predictive algorithms. PFPM, the Polymer Flood Predictive Model, is switch-selectable for either polymer or waterflooding, and an option allows the calculation of the incremental oil recovery and economics of polymer relative to waterflooding. SFPM, the Steamflood Predictive Model, is applicable to the steam drive process, but not to cyclic steam injection (steam soak) processes.

Ray, R.M. (DOE Bartlesville Energy Technology Technology Center, Bartlesville, OK (United States))

1986-12-01T23:59:59.000Z

479

TIME-LAPSE MODELING AND INVERSION OF CO{sub 2} SATURATION FOR SEQUESTRATION AND ENHANCED OIL RECOVERY  

SciTech Connect

In the second quarter of this DOE NETL project, we have continued Phase I and Phase II activities for researching and developing new technology to quantitatively model the rock physics effects of CO{sub 2}-oil-water systems. These activities included completing a literature search of currently available equation-of-state methods, initiating work in molecular dynamics modeling, and building a prototype seismic modeling code for predicting time-lapse CO{sub 2} changes in well-log models. We have also received permission to use the Sleipner time-lapse CO{sub 2} data set from the North Sea for the current NETL project, and have issued a formal request for the data.

Mark A. Meadows

2004-05-10T23:59:59.000Z

480

DISTRIBUTION AND RANGE OF RADIONUCLIDE SORPTIOIN COEFFICIENTS IN A SAVANNAH RIVER SITE SUBSURFACE: STOCHASTIC MODELING CONSIDERATIONS - 10259  

SciTech Connect

The uncertainty associated with the sorption coefficient, or K{sub d} value, is one of the key uncertainties in estimating risk associated with burying low-level nuclear waste in the subsurface. The objective of this study was to measure >648 K{sub d} values and provide a measure of the range and distribution (normal or log-normal) of radionuclide K{sub d} values appropriate for the E-Area disposal site, within the Savannah River Site, near Aiken South Carolina. The 95% confidence level for the mean K{sub d} was twice the mean in the Aquifer Zone (18-30.5 m depth), equal to the mean for the Upper Vadose Zone (3.3-10 m depth), and half the mean for the Lower Vadose Zone (3.3-18 m depth). The distribution of K{sub d} values was log normal in the Upper Vadose Zone and Aquifer Zone, and normal in the Lower Vadose Zone. To our knowledge, this is the first report of natural radionuclide K{sub d} variability in the literature. Using ranges and distribution coefficients that are specific to the hydrostratigraphic unit improved model accuracy and reduced model uncertainty. Unfortunately, extension of these conclusions to other sites is likely not appropriate given that each site has its own sources of hydrogeological variability. However, this study provides one of the first examples of the development stochastic ranges and distributions of K{sub d} values for a hydrological unit for stochastic modeling.

Kaplan, D.

2010-01-04T23:59:59.000Z

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481

Model replication: transformations to address model scalability  

Science Conference Proceedings (OSTI)

In model-driven engineering, it is often desirable to evaluate different design alternatives as they relate to scalability issues of the modeled system. A typical approach to address scalability is model replication, which starts by creating base models ... Keywords: domain-specific modeling, model transformation, model-driven engineering, scalability

Yuehua Lin; Jeff Gray; Jing Zhang; Steve Nordstrom; Aniruddha Gokhale; Sandeep Neema; Swapna Gokhale

2008-11-01T23:59:59.000Z

482

Criticality Model  

Science Conference Proceedings (OSTI)

The ''Disposal Criticality Analysis Methodology Topical Report'' (YMP 2003) presents the methodology for evaluating potential criticality situations in the monitored geologic repository. As stated in the referenced Topical Report, the detailed methodology for performing the disposal criticality analyses will be documented in model reports. Many of the models developed in support of the Topical Report differ from the definition of models as given in the Office of Civilian Radioactive Waste Management procedure AP-SIII.10Q, ''Models'', in that they are procedural, rather than mathematical. These model reports document the detailed methodology necessary to implement the approach presented in the Disposal Criticality Analysis Methodology Topical Report and provide calculations utilizing the methodology. Thus, the governing procedure for this type of report is AP-3.12Q, ''Design Calculations and Analyses''. The ''Criticality Model'' is of this latter type, providing a process evaluating the criticality potential of in-package and external configurations. The purpose of this analysis is to layout the process for calculating the criticality potential for various in-package and external configurations and to calculate lower-bound tolerance limit (LBTL) values and determine range of applicability (ROA) parameters. The LBTL calculations and the ROA determinations are performed using selected benchmark experiments that are applicable to various waste forms and various in-package and external configurations. The waste forms considered in this calculation are pressurized water reactor (PWR), boiling water reactor (BWR), Fast Flux Test Facility (FFTF), Training Research Isotope General Atomic (TRIGA), Enrico Fermi, Shippingport pressurized water reactor, Shippingport light water breeder reactor (LWBR), N-Reactor, Melt and Dilute, and Fort Saint Vrain Reactor spent nuclear fuel (SNF). The scope of this analysis is to document the criticality computational method. The criticality computational method will be used for evaluating the criticality potential of configurations of fissionable materials (in-package and external to the waste package) within the repository at Yucca Mountain, Nevada for all waste packages/waste forms. The criticality computational method is also applicable to preclosure configurations. The criticality computational method is a component of the methodology presented in ''Disposal Criticality Analysis Methodology Topical Report'' (YMP 2003). How the criticality computational method fits in the overall disposal criticality analysis methodology is illustrated in Figure 1 (YMP 2003, Figure 3). This calculation will not provide direct input to the total system performance assessment for license application. It is to be used as necessary to determine the criticality potential of configuration classes as determined by the configuration probability analysis of the configuration generator model (BSC 2003a).

A. Alsaed

2004-09-14T23:59:59.000Z

483