Hydrologic model based on deep test data from the Walker O No. 1 well, Terminal Geyser, California
The Shasta Forest No. 1 Well (renamed Walker O No. 1) at Terminal Geyser, California, was reentered and deepened from 1258 to 4008 feet. Temperature logs indicate the well penetrated a laterally flowing thermal aquifer between 1400 and 2200 feet. Large amounts of drilling fluids were lost in that zone. Maximum temperature in the well (10 months after drilling) was 348/sup 0/F at 2000 feet. A large reversed temperature gradient zone occurs below 2400 feet. Bottom hole temperature is 256/sup 0/F. After completion, the well was flowed for about five hours with nitrogen injection at 2000 feet. Samples taken throughout the flow indicate that fluids lost during drilling were not completely recovered. Salinity increased steadily during the flow period. Ratios of Na, K, and Ca were nearly constant, however, and application of Na-K and Na-K-Ca geothermometers indicate these fluids were in equilibrium with rocks at a temperature of 448-449/sup 0/F.
- Research Organization:
- Phillips Petroleum Co. Geothermal Operations, Salt Lake City, UT
- OSTI ID:
- 6740431
- Report Number(s):
- CONF-811015-
- Journal Information:
- Trans. - Geotherm. Resour. Counc.; (United States), Vol. 5; Conference: Geothermal Resources Council annual meeting, Houston, TX, USA, 25 Oct 1981
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GEOTHERMAL WELLS
HYDROLOGY
TESTING
AMMONIA
AQUIFERS
CALIFORNIA
FLOW RATE
FLUID INJECTION
GEOLOGIC MODELS
GEOTHERMOMETRY
NITROGEN
SALINITY
TEMPERATURE GRADIENTS
TEMPERATURE LOGGING
WELL DRILLING
DRILLING
ELEMENTS
FEDERAL REGION IX
HYDRIDES
HYDROGEN COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
NORTH AMERICA
USA
WELL LOGGING
WELLS
150901* - Geothermal Engineering- Drilling Technology & Well Hardware
150201 - Geology & Hydrology of Geothermal Systems- USA- (-1989)