Northwest Geysers

Drilling and completion of Multiple-Legged Wells in the Northwest Geysers

Basic Information
Author: 
Henneberger, R.C.
Author: 
Quinn, D.G.
Author: 
Chase, D.
Author: 
Gardner, M.C.
Description: 
The technique of completing or recompleting production wells as multiple-legged or "forked" wells has been successfully applied in the Aidlin area of the northwest Geysers field. Wells in the Aidlin area are deeper, hotter and have smaller diameter casings than wells in the southeastern part of the field, where forked wells have been drilled previously. These factors, plus frequently unstable formation conditions at the production casing shoe, add further complications to the forking technique. During 1992-1993, two producing wells at Aidlin were worked over and recompleted as two-legged producers, and one new well was completed with three producing legs. Despite a variety of drilling problems, each of the recompletions resulted in a significant increase in well productivity, with an average increase per well of 58 %. In addition to yielding steam production at a cost that is relatively low compared with drilling new wells, multiple-legged recompletions allow for more flexible scheduling, budgeting and permitting of drilling programs.
Publication Date: 
Friday, January 1, 1993
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/Henneberger_1993-1.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: 
39.4556
South bounding latitude: 
35.4096
West bounding longitude: 
-122.695
East bounding longitude: 
-116.543
Previous Citation
Bibliographic Citation: 
Roger C. Henneberger, Donald G. Quinn, Daniel Chase, and Murray C. Gardner, 1993. Drilling and completion of Multiple-Legged Wells in the Northwest Geysers. GeothermEx, Inc., Richmond, California. Northern California Power Agency, Roseville, California. Geothermal Energy Partner, Irvine, California.
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