Hot Dry Rock Experiment in Tuff at Akinomiya, Northern Japan
- Key words
- HDR; Japan; Akita; Akinomiya; Sites; Engineering; Hydraulic Fracturing; Testing
- Location
- Akinomiya, Japan
- Conference
- Geothermal Resources Council Transactions
- Year
- 1990
- Session
- HDR/EGS; Hydraulic fracturing; Well testing; Injection testi
- Language
- English
Abstract
A small scale Hot Dry Rock experiment in using 400 m depth wells was conducted in Tertiary lapilli tuff at Akinomiya in Akita, Japan. In this experiment a new hydraulic fracturing system in a well without using open hole packers. A water circulation test was conducted between two wells that were hydraulically connected through the fracture system. The results showed that the production rate of circulated water was very low (1-2% of injection flow rte) compared to that of results in granite. However, including post injection venting, the total volume of water recovered in the production well is expected to be more than 10% of the injected water volume.
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