Self-Potential Survey in Hachijojima
- Key words
- geothermal, self-potential, hachijojima island, monitoring
- Location
- Hachijojima, Japan
- Conference
- World Geothermal Congress
- Year
- 2000
- Session
- Reservoir Evaluation
- Language
- English
- Paper number
- R0603
Full text
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Abstract
Self-potential survey was carried out around Hachijojima geothermal power station. The regional self-potential distribution indicates that the power plant is located near the northeastern margin of the central part of a NW-SE trending high-potential zone, which presumably originated in an up-current of hydrothermal solutions. The continuous monitoring of self-potential indicates that a potential-fall zone formed some 200 m southeast of the power plant after the beginning of steam production. The change in self-potential probably resulted from a change in reservoir related to the steam production. Periodical surveys on the self-potential will be carried out in the future to study how to extract and analyze self-potential fluctuations caused by a change in reservoirs.
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