A Study of Production/Injection Data from Slim Holes and Large-Diameter Wells at the Okuaizu Geothermal Field, Tohoku, Japan
Discharge from the Okuaizu boreholes is accompanied by in situ boiling. Analysis of cold-water injection and discharge data from the Okuaizu boreholes indicates that the two-phase productivity index is about an order of magnitude smaller than the injectivity index. The latter conclusion is in agreement with analyses of similar data from Oguni, Sumikawa, and Kirishima geothermal fields. A wellbore simulator was used to examine the effect of borehole diameter on the discharge capacity of geothermal boreholes with two-phase feedzones. Based on these analyses, it appears that it should be possible to deduce the discharge characteristics of largediameter wells using test data from slim holes with two-phase feeds.
- Research Organization:
- Idaho National Laboratory (INL)
- Sponsoring Organization:
- DOE - EE
- DOE Contract Number:
- AC07-99ID13727
- OSTI ID:
- 910749
- Report Number(s):
- INEEL/EXT-02-01429
- Country of Publication:
- United States
- Language:
- English
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