Drilling and thermal gradient measurements at US Marine Corps Air Ground Combat Center, Twentynine Palms, California. Final report, October 1, 1983-March 31, 1984

Technical Report · Sun Jan 01 04:00:00 EST 1984

DOI:https://doi.org/10.2172/6990041· OSTI ID:6990041

Trexler, D T; Flynn, T; Ghusn, G Jr

Seven temperature gradient holes were drilled at the Marine Corps Air Ground Combat Center, Twentynine Palms, California, as part of a cooperative research and development program, jointly funded by the Navy and Department of Energy. The purpose of this program was to assess geothermal resources at selected Department of Defense installations. Drill site selection was based on geophysical anomalies delineated by combined gravity, ground magnetic and aeromagnetic surveys. Temperature gradients ranged from 1.3/sup 0/C/100 m (1/sup 0/F/100 ft.) in hole No. 1 to 15.3/sup 0/C/100 m (8.3/sup 0/F/100 ft.) in temperature gradient hole No. 6. Large, positive geothermal gradients in temperature gradient holes 5 and 6, combined with respective bottom hole temperatures of 51.6/sup 0/C (125/sup 0/F) and 67/sup 0/C (153/sup 0/F), indicate that an extensive, moderate-temperature geothermal resource is located on the MCAGCC. The geothermal reservoir appears to be situated in old, unconsolidated alluvial material and is structurally bounded on the east by the Mesquite Lake fault and on the west by the Surprise Spring fault. If measured temperature gradients continue to increase at the observed rate, temperatures in excess of 80/sup 0/C (178/sup 0/F) can be expected at a depth of 2000 feet.

• Research Organization: Nevada Univ., Las Vegas (USA). Div. of Earth Sciences
• DOE Contract Number: AC03-83SF11956
• OSTI ID: 6990041
• Report Number(s): DOE/SF/11956-1; ON: DE84012803
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150301* -- Geothermal Exploration & Exploration Technology-- Geophysical Techniques & Surveys
150303 -- Geothermal Exploration & Exploration Technology-- Exploratory Drilling & Well Logging
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CALIFORNIA
CAVITIES
DRILLING
FEDERAL REGION IX
GEOTHERMAL GRADIENTS
GEOTHERMAL RESOURCES
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RESERVOIR TEMPERATURE
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TEMPERATURE GRADIENTS
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WELL DRILLING
WELL TEMPERATURE