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An integrated study of the Grayburg/San Andres reservoir, Foster and south Cowden fields, Ector County, Texas. Quarterly report, January 1--March 31, 1996

Description: The principal objective of this research is to demonstrate in the field that 3D seismic data can be used to aid in identifying porosity zones, permeability barriers and thief zones and thereby improve waterflood design. Geologic and engineering data will be integrated with the geophysical data to result in a detailed reservoir characterization. Reservoir simulation will then be used to determine infill drilling potential and the optimum waterflood design for the project area. This design will be implemented and the success of the waterflood evaluated.
Date: June 17, 1996
Creator: Trentham, R.C.; Weinbrandt, R. & Reeves, J.J.
Partner: UNT Libraries Government Documents Department

An integrated study of the Grayburg/San Andres reservoir, Foster and South Cowden fields, Ector County, Texas. Quarterly report, October--December, 1996

Description: Seismic objectives addressed during the fourth quarter concerned seismic recognition of Grayburg carbonate porosity and development of maps of the distribution of seismic properties which can be related to reservoir porosity. Synthetic seismograms representing various porosity combinations for the Grayburg A sequence were interpolated in forward models to demonstrate waveform character, and a seismic inversion model was used as the basis for work with seismic-guided attribute maps which have been instrumental in defining porosity within the upper Grayburg. The geologic objectives addressed during the quarter were the integration of the geologic model into the 3D to accurately portray the lithologic markers, the coring and logging of the Witcher {number_sign}12, and working toward the development of a successful completion technique for the lower Grayburg and San Andres. Considerable effort went into developing a usable seismic velocity/log porosity transform. There were a number of engineering objectives this quarter. The development of a successful completion technique for the lower Grayburg and San Andres which would contact the maximum volume of reservoir, minimize potential water production, and be cost effective was a high priority. The Witcher {number_sign}12 was drilled, and Foster-Pegues {number_sign} 4 re-entered and converted to injection this Quarter. The first steps in the quantitative integration of seismic data into the reservoir simulation were taken this quarter. Work on water quality, buildup and fall off tests and the update of production and injection data in the model was ongoing.
Date: March 17, 1997
Creator: Trentham, R.C.; Weinbrandt, R. & Robertson, W.
Partner: UNT Libraries Government Documents Department

An integrated study of the Grayburg/San Andres Reservoir, Foster and South Cowden fields, Ector County, Texas. Quarterly report, April 1--June 31, 1996

Description: The principal objective of this research is to demonstrate in the field that 3D seismic data can be used to aid in identifying porosity zones, permeability barriers and thief zones and thereby improve waterflood design. Geologic and engineering data will be integrated with the geophysical data to result in a detailed reservoir characterization. Reservoir simulation will then be used to determine infill drilling potential and the optimum waterflood design for the project area. This design will be implemented and the success of the waterflood evaluated.
Date: October 17, 1996
Creator: Trentham, R.C.; Weinbrandt, R. & Robertson, W.
Partner: UNT Libraries Government Documents Department

An integrated study of the Grayburg/San Andres reservoir, Foster and South Cowden fields, Ector County, Texas. Quarterly report, April 1--June 31, 1996. Revision

Description: The principal objective of this research is to demonstrate in the field that 3D seismic data can be used to aid in identifying porosity zones, permeability barriers and thief zones and thereby improve waterflood design. Geologic and engineering data will be integrated with the geophysical data to result in a detailed reservoir characterization. Reservoir simulation will then be used to determine infill drilling potential and the optimum waterflood design for the project area. This design will be implemented and the success of the waterflood evaluated.
Date: October 17, 1996
Creator: Trentham, R. C.; Weinbrandt, R. & Robertson, W.
Partner: UNT Libraries Government Documents Department

Numerical studies of fluid-rock interactions in EnhancedGeothermal Systems (EGS) with CO2 as working fluid

Description: There is growing interest in the novel concept of operating Enhanced Geothermal Systems (EGS) with CO{sub 2} instead of water as heat transmission fluid. Initial studies have suggested that CO{sub 2} will achieve larger rates of heat extraction, and can offer geologic storage of carbon as an ancillary benefit. Fluid-rock interactions in EGS operated with CO{sub 2} are expected to be vastly different in zones with an aqueous phase present, as compared to the central reservoir zone with anhydrous supercritical CO{sub 2}. Our numerical simulations of chemically reactive transport show a combination of mineral dissolution and precipitation effects in the peripheral zone of the systems. These could impact reservoir growth and longevity, with important ramifications for sustaining energy recovery, for estimating CO{sub 2} loss rates, and for figuring tradeoffs between power generation and geologic storage of CO{sub 2}.
Date: January 17, 2008
Creator: Xu, Tianfu; Pruess, Karsten & Apps, John
Partner: UNT Libraries Government Documents Department

EPRI geothermal energy R and D 5-year program plan (1975 to 1979)

Description: The recommended EPRI Geothermal Research and Development 5-Year Program Plan has been defined to complement and provide focus for federally sponsored geothermal energy R and D efforts. The scope of the program includes: verification of hydrothermal reservoir capability and low salinity brine heat transfer characteristics at a potential demonstration site followed by design, development and construction of a low salinity hydrothermal demonstration plant in conjunction with an electric utility or utility consortium. Development of a comprehensive set of Guidelines Manuals for use by utility management and engineers spanning the full range of geothermal resource utilization from exploration through plant startup, including not only technical, but environmental, institutional and regulatory factors. A subprogram to define the potential and requirements for Geothermal Systems. A supporting research and technology subprogram oriented toward minimizing the risk associated with utilization of low and high salinity hydrothermal sources. An Advanced Research and Technology subprogram to assess the potential of geopressure resources in conjunction with the Federal government and limited R and D on advanced concepts for utilization of hydrothermal fluids. (MHR)
Date: October 17, 1974
Creator: Spencer, D.F.
Partner: UNT Libraries Government Documents Department