Unit 15

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

Basic Information
Author: 
Sanyal, S.K.
Author: 
Klein, C.W.
Author: 
McNitt, J.R.
Author: 
Henneberger, R.C.
Author: 
MacLeod, K.
Description: 
This paper presents a technical feasibility analysis of the Western Geopower Corporation’s (“WGP”) 25.5 MW Unit 1 power project at The Geysers steam field, California; the WGP leasehold covers 567 acres. A commercial power plant (P.G.&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: 
Monday, January 1, 2007
Resource Language: 
English
Intelectual Originator Contact
Organization Name: 
GeothermEx, Inc.
Street Address: 
3260 Blume Drive,Suite 220
City: 
Richmond
State/Province: 
CA
Postal Code: 
94806
Country: 
United States
Phone: 
510-527-9876
Fax: 
510-527-8164
Resource Information
Access Statement: 
Abstract available online at http://www.geothermex.com/files/Sanyal_2007-3.pdf | For a copy of this paper please e-mail us at mw@geothermex.com
Resource Distribution Contact
Organization Name: 
GeothermEx, Inc.
Street Address: 
3260 Blume Drive,Suite 220
City: 
Richmond
State/Province: 
CA
Postal Code: 
94806
Country: 
United States
Phone: 
510-527-9876
Fax: 
510-527-8164
Geographic Extent
North bounding latitude: 
39.0643
South bounding latitude: 
37.1454
West bounding longitude: 
-123.772
East bounding longitude: 
-121.113
Previous Citation
Bibliographic Citation: 
Sanyal, S.K., Klein, C.W., McNitt, J.R.Henneberger, R.C., and MacLeod, K., 2007.Assessment of Power Generation Capacity of the Western Geopower Leasehold at The Geysers Geothermal Field, California. GeothermEx, Inc., Richmond, California. Western Geopower Corporation, Vancouver, B.C., Canada
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