Assessment of Power Generation Capacity of the Western Geopower Leasehold at The Geysers Geothermal Field, California

Basic Information
Author: MacLeod, K., Henneberger, R.C., McNitt, J.R., Klein, C.W., and Sanyal, S.K.
Description:This paper presents a technical feasibility analysis of the Western Geopower Corporations (WGP) 25.5 MW Unit 1 power project at The Geysers steam field, California; the WGP lease hold covers 567 acres. A commercial power plant (P.G.and E.Unit 15) operated at this leasehold during 1979 to 1989; the plant was shut down and dismantled, and the wells were plugged and abandoned, mainly due to the unduly high rate of decline in well productivity then experienced throughout The Geysers field. A new geothermal power development at this site has several attractive attributes: (a) a long production history and a large amount of resource data are available; (b) a substantial infrastructure still exists intact at the site; and (c) the decline rates in reservoir pressure and well productivity throughout The Geysers field are far lower today than when the original plant operated. An assessment of the geological characteristics of the field indicates that at least 423 acres of the leasehold can potentially supply steam to a power plant. Based on the potentially productive acreage and the 10 year production history of the original wells, steam reserves within supply a 25.5 MW plant for a project life of at least 20 years.
Publication Date:
Author Contact Information
Distributor Contact Information
Organization Name: Arizona Geological Survey
Street: 416 W. Congress St. Ste. 100
City: Tucson
State: Arizona
Zip: 85701
Phone: 520-770-3500
Geographic Extent
North Bounding Latitude: 39.0391706023
South Bounding Latitude: 38.4995333149
East Bounding Longitude: -122.627619612
West Bounding Longitude: -123.264826643