| Title | Geothermal Exploration, Drilling, and Reservoir Assessment for a 30 Mw Power Project at the Naval Air Station, Fallon, Nevada, U |
|---|---|
| Authors | Jim Combs, Francis C. Monastero, Kenneth R. Bonin Sr., David M. Meade |
| Year | 1995 |
| Conference | World Geothermal Congress |
| Keywords | basin and range, geothermal exploration, production-type, slim-hole, electrical generating potential, Naval Air Station Fallon, Nevada |
| Abstract | A moderate- to high-temperature geothermal reservoir, situated at economically exploitahle depths. has hecn identified at Naval Air Station, Fallon. Nevada. USA. Based on the analysis and interpretation of temperatures, thermal gradients. and heat flow determinations in shallow and intermediate-depth boreholes; (2) the assessment of hydrothermal alteration patterns these boreholes: the distrihution of trace mercury in surface soils; (4) the surface and suhsurface structural patterns indicated hy the position and orientation of lineaments. fractures, and faults in the area: and, the interpretation of surface geophysical anomalies; a geothermal reservoir of 200?C was predicted to encountered as shallow as m. The reservoir rock type appears to he a pre-Tertiary hasement complex that is extensively fractured. suggested hy surface fault patterns and the results of the trace mercury study. Chemical analyses of suhsurface fluids and fluid from a hot well as well Na-K-Ca geothermometry, indicate that the maximum estimated of the reservoir is to 204?C. flow test data on a deep production-type hole of 2,119 total depth demonstrates the fracture in the hasement complex and the productive capacity of the geothermal reservoir. The estimated temperature of the geothermal resource is 190?C to 220?C with the reservoir situated at 1,500 to meters. Therefore, the reservoir heneath NAS Fallon should supply geothermal fluids in sufficient quantities at temperatures necessary for the economic development of a minimum of 30 MW geothermal electric power project. |