Development

Utility of the Data Gathered From the Fenton Hill Project for Development of Enhanced Geothermal Systems

Basic Information
Author: 
Robertson-Tait, A.
Author: 
Klein, C.W.
Author: 
McLarty, L.
Description: 
To prioritize information for archiving and to determine the applicability of the Fenton Hill experience to the future development of Enhanced Geothermal Systems (EGS), an integrated review was made of five categories of Fenton Hill information: hydraulic fracturing data, well logs, seismic data, flow test data and tracer test data. Major experiments were identified, the methods of data collection and analysis were determined, the location and format of the data were determined, and further analyses that would yield information of value to EGS developers were suggested. Such analyses would be directed toward the determination of: I) if and how the state of stress in the reservoir changed during sequential fracturing jobs; 2) how the orientation of fractures changed with depth and location; 3) how the reservoir size increased as fracturing and flow testing operations proceeded; 4) how the hydraulic properties and heat-transfer characteristics of the reservoir varied with changes in operating conditions; and 5) how the Phase II reservoir (the deeper and hotter of the two reservoirs developed) would behave over the long term under various operating conditions.
Publication Date: 
Saturday, January 1, 2000
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
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: 
36.0345
South bounding latitude: 
35.7184
West bounding longitude: 
-106.729
East bounding longitude: 
-106.293

The Economics of Sustainable Geothermal Development

Basic Information
Author: 
Lovekin, J.W.
Description: 
In planning the development of a geothermal field, there is a trade-off between plant capacity and the cost of make-up drilling. A larger plant benefits from economies of scale in the construction and operation of surface facilities. On the other hand, a larger plant also places a greater load on the geothermal reservoir, which causes higher rates of decline in well productivity. Greater decline rates for existing wells require a larger number of make-up wells. Because the cost of make-up wells occurs later in the project life, this cost has relatively less impact on project economics than the up-front cost of plant construction. Similarly, the loss of revenue from a decline in output late in a project's life is much less significant than revenue foregone at the start of a project due to limited plant capacity.
Publication Date: 
Saturday, January 1, 2000
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
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: 
75
South bounding latitude: 
17
West bounding longitude: 
-180
East bounding longitude: 
-64

Cost of Geothermal Power and Factors that Affect it.

Basic Information
Author: 
Sanyal, S.K.
Description: 
This paper presents an analysis of the sensitivity of the cost of geothermal power to: (a) capital cost; (b) operations-and-maintenance (O&M) cost; (c) make-up well drilling cost; (d) resource characteristics (well productivity and its rate of decline); (e) development and operational options (installed plant capacity, number of years of make-up well drilling, and project life); and (f) macro-economic climate (interest and inflation rates). The power cost here represents levelized cost (in cents per kilowatt-hour) over the project life, the capital cost being amortized over 30 years; any royalties, tax burden, or tax credit are ignored. A range of development sizes, from 5 to 150 MW, is considered. The economy of scale in both capital cost and O&M cost, as well as the higher productivity decline rate due to increased installed capacity, are taken into account.
Publication Date: 
Thursday, January 1, 2004
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/file_4a8dad8ae2bf2.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: 
41.9864
South bounding latitude: 
32.79
West bounding longitude: 
-124.805
East bounding longitude: 
-113.73
Previous Citation
Bibliographic Citation: 
Subir K. Sanya, 2004. Cost of Geothermal Power and Factors that Affect it. GeothermEx, Inc., Richmond, California.
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