Exploratory Well At Long Valley Caldera Geothermal Area (Smith & Rex, 1977)
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|
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.
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 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. Maximum temperatures of 72°C encountered at the bottom of the hole were too low for commercial power production.
- J.L. Smith, R.W. Rex (1977) Drilling results from eastern Long Valley Caldera
- Michael L. Sorey, Robert Edward Lewis, F.H. Olmsted (1978) The Hydrothermal System of Long Valley Caldera, California
- 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.
- 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.