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in subjects: "Vapor-Dominated Systems"  
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The Clearlake Hot Dry Rock geothermal project: Institutional policies, administrative issues, and technical tasks

Description: The Clearlake Project is a three-party collaboration between the California Energy Commission, City of Clearlake, and Los Alamos National Laboratory. It aims to develop a deep hot, dry geothermal resource under the city. The project is funded by the Commission, and administered by the City. Technical operations are conducted by Laboratory staff and resources seconded from the Hot Dry Rock program. In addition to the normal geothermal exploration problems of predicting geological and geophysical… more
Date: January 1, 1991
Creator: Burns, K.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Tenth workshop on geothermal reservoir engineering: proceedings

Description: The workshop contains presentations in the following areas: (1) reservoir engineering research; (2) field development; (3) vapor-dominated systems; (4) the Geysers thermal area; (5) well test analysis; (6) production engineering; (7) reservoir evaluation; (8) geochemistry and injection; (9) numerical simulation; and (10) reservoir physics. (ACR)
Date: January 22, 1985
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Modeling studies of cold water injection into fluid-depleted, vapor-dominated geothermal reservoirs

Description: The physical processes involved in cold water injection into a ''superheated'' fractured reservoir are not yet fully understood, and this insufficient knowledge of the fundamental mechanisms limits the possibility of forecasting future resevoir behavior and optimizing the heat extraction process. Numerical simulation can be a very effective tool in the study of the complex phenomena involved, allowing a rapid examination of different situations and conditions, a systematic investigation of the … more
Date: January 1, 1986
Creator: Calore, C.; Pruess, K. & Celati, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Heat flow and microearthquake studies, Coso Geothermal Area, China Lake, California. Final report

Description: The present research effort at the Coso Geothermal Area located on the China Lake Naval Weapons Center, China Lake, California, was concerned with: (1) heat flow studies and (2) microearthquake studies associated with the geothermal phenomena in the Coso Hot Springs area. The sites for ten heat flow boreholes were located primarily using the available seismic ground noise and electrical resistivity data. Difficulty was encountered in the drilling of all of the holes due to altered, porous, faul… more
Date: January 1, 1975
Creator: Combs, J.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Geothermal Research and Development Program

Description: Results are reported on adsorption of water vapor on reservoir rocks, physics of injection of water into vapor-dominated geothermal reservoirs, earth-tide effects on downhole pressures, injection optimization at the Geysers, effects of salinity in adsorption experiments, interpreting multiwell pressure data from Ohaaki, and estimation of adsorption parameters from transient experiments.
Date: January 25, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On fluid and heat transfer in deep zones of vapor-dominated geothermal reservoirs

Description: Little is known about fluid and heat transfer process, and thermodynamic conditions of formation fluids beneath the main permeable zones of vapor-dominated systems. Temperature data is presented for deep horizons at Larderello, Italy. The data was analyzed with a view to identifying reservoir conditions and processes at depth. Of particular interest were the mechanisms and rates of fluid and heat flow in the natural state and in response to exploitation, and the permeability structure of the re… more
Date: January 1, 1987
Creator: Pruess, K.; Celati, R.; Calore, C. & Cappetti, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Well-bore effects in the analysis of two-phase geothermal well tests

Description: A method of designing and analyzing pressure transient well tests of two-phase (steam-water) reservoirs is given. Wellbore storage is taken into account and the duration of it is estimated. It is shown that the wellbore flow can completely dominate the downhole pressure signal such that large changes in the downhole pressure that might be expected because of changes in kinematic mobility are not seen. Changes in the flowing enthalpy from the reservoir can interact with the wellbore flow so that… more
Date: January 1, 1981
Creator: Miller, C. W.; Benson, S.; O'Sullivan, M. J. & Pruess, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Geothermal Research and Development Program. Quarterly technical report, September--December 1992

Description: Results are reported on adsorption of water vapor on reservoir rocks, physics of injection of water into vapor-dominated geothermal reservoirs, earth-tide effects on downhole pressures, injection optimization at the Geysers, effects of salinity in adsorption experiments, interpreting multiwell pressure data from Ohaaki, and estimation of adsorption parameters from transient experiments.
Date: January 25, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pressure-Temperature-Spinner Survey in a Well at the Geysers

Description: This paper presents results from a flowing pressure-temperature-spinner log run in a well drilled by GEO Operator Corporation (GEOOC) at The Geysers. Analysis and interpretation of the log data are also presented. The data indicated superheated steam with a temperature of 600 F (316 C) and an enthalpy of 1316 BTU/lbm (725 cal/gm) entered the wellbore below 8000 feet (2438 meters). This temperature and enthalpy is much higher than most Geysers steam wells which produce steam at or below 475 F (2… more
Date: January 21, 1986
Creator: Drenick, Andy
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effects of capillarity and vapor adsorption in the depletion of vapor-dominated geothermal reservoirs

Description: Vapor-dominated geothermal reservoirs in natural (undisturbed) conditions contain water as both vapor and liquid phases. The most compelling evidence for the presence of distributed liquid water is the observation that vapor pressures in these systems are close to saturated vapor pressure for measured reservoir temperatures (White et al., 1971; Truesdell and White, 1973). Analysis of natural heat flow conditions provides additional, indirect evidence for the ubiquitous presence of liquid. From … more
Date: January 1, 1992
Creator: Pruess, Karsten & O'Sullivan, Michael
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Lassen geothermal system

Description: The Lassen geothermal system consists of a central vapor-dominated reservoir underlain by hot water that discharges peripherally at lower elevations. The major thermal upflow at Bumpass Hell (elevation 2500 m) displays numerour superheated fumaroles, one of which in 1976 was 159/sup 0/C. Gas geothermometers from the fumarole areas and water geothermometers from boiling Cl-bearing waters at Morgan Hot Springs (elevation 1530 m; 8 km south of Bumpass Hell) and from 176/sup 0/C waters in a well 12… more
Date: January 1, 1982
Creator: Muffler, L. J. Patrick; Nehring, Nancy L.; Truesdell, Alfred H.; Janik, Cathy J.; Clynne, Michael A. & Thompson, J. Michael
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental and Theoretical Studies of Liquid Injection into Vapour-Dominated Reservoirs

Description: We analyze the injection of liquid into a depleted geothermal reservoir using numerical, analytical and experimental techniques. We first investigate the injection of liquid at the base of a uniformly heated reservoir and show how an ascending liquid layer develops. Ahead of the liquid-vapor interface the temperature rises sharply and, for cases in which the permeability is sufficiently high, the vapor is approximately isobaric. The region immediately behind the advancing liquid-vapor interface… more
Date: January 1, 1995
Creator: Fitzgerald, S. D. & Woods, A. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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