Exploratory Well At Long Valley Caldera Geothermal Area (Smith & Rex, 1977)

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Exploration Activity: Exploratory Well At Long Valley Caldera Geothermal Area (Smith & Rex, 1977)

Exploration Activity Details
Location Long Valley Caldera Geothermal Area
Exploration Technique Exploratory Well
Activity Date 1976 - 1976

Usefulness useful
DOE-funding Unknown

 
Exploration Basis
Despite the favorable results from the early production test wells drilled at Casa Diablo, no additional commercial exploration drilling was conducted until 1976, when Republic Geothermal, Inc. drilled the 66-29 well into the southeastern portion of the caldera.
 
Notes
This was the first deep exploratory well sited within the caldera, drilled to 2,109 m depth just east of the northern extension of the Hilton Creek fault. Data from well 66-29 are available online[1] through the California Department of Conservation Division of Oil, Gas & Geothermal Resources and have been contributed to studies of the temperature distribution within the caldera conducted by the U.S. Geological Survey.[2] Maximum temperatures of 72°C encountered at the bottom of the hole were too low for commercial power production.

 
References


Additional References
  1. State of California Department of Conservation. Casa Diablo/Long Valley Caldera Area, Mono County. [Map]. Place of publication not provided. State of California Department of Conservation. 2009. Available from: http://www.conservation.ca.gov/dog/geothermal/maps/Pages/Index.aspx#g1.
  2. Christopher Farrar,Jacob DeAngelo,Colin Williams,Frederick Grubb,Shaul Hurwitz. 2010. Temperature Data From Wells in Long Valley Caldera, California. (!) : U.S. Geological Survey. Report No.: Data Series 523.