A Study of Production/injection Data from Slim Holes and Large-Diameter Production Wells at the Oguni Geothermal Field, Japan
- Key words
- Oguni geothermal field, slim holes, large-diameter wells, temperature/pressure data, discharge/injection data, productivity/injectivity indices
- Location
- Oguni, Japan
- Conference
- World Geothermal Congress
- Year
- 1995
- Session
- SECTION 7 - Field Management and Monitoring
- Language
- English
- Paper number
- 3-garg
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Abstract
Production and injection data from slim holes and large-diameter wells at the Oguni Geothermal Field, Japan, were examined in an effort to establish relationships (1) between productivity of large-diameter wells and slim holes, (2) between injectivity and productivity indices of slim holes and large-diameter wells, and (3) between productivity index and borehole diameter. The production data from Oguni boreholes imply that the mass production from large-diameter wells may be estimated based on data from slim holes. Test data from both large- and small-diameter boreholes indicate that to first order the productivity and the injectivity indices are equal. Somewhat surprisingly, the productivity index was found to be a strong function of borehole diameter; the cause for this phenomenon is not understood at this time.
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