A Case Study of Wide Diameter Casing for Geothermal Wells
- Conference
- New Zealand Geothermal Workshop
- Year
- 1995
- Language
- English
Full text
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Abstract
Three wells have been drilled in the central resistivity area of a geothermal field in the Taupo Volcanic Zone, New Zealand. Using a well bore simulator, WELL V3.0,reservoir conditions and well characteristics are evaluated to determine the increase in output by increasing production casing diameters from either OD or OD.to OD. Increases in well drilling costs are determined to provide a commentary on the economics. While open hole size is effectively doubled, well costs increaseby 10%and, in this study, output increases by an average of 18%.
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