Mise-A-La-Masse Mapping of the HGP-A Geothermal Reservoir, Hawaii
- Key words
- Exploration; USA; Hawaii; Puna; Geophysical Survey; Electrical Conductivity
- Location
- Puna, Hawaii; Kilauea East Rift Zone, Hawaii
- Conference
- Geothermal Resources Council Transactions
- Year
- 1980
- Session
- Exploration; Geophysical surveys; Resistivity surveys
- Language
- English
Abstract
The HGP-A well casing was used as an electrode in a mise-a-la-masse experiment to define the boundaries of the geothermal reservoir. Electric potentials were measured to distances of 2 km from the drill holes. Although cased or lined the full 1967 m, only the top 670 m of the HGP-A casing are electrically contiguous; the electrode did not extend into the high temperature part of the reservoir. Nevertheless, the date did define a compartment of dike-impounded freshwater of higher resistivity than the surrounding saltwater saturated rock. This dike-impounded water is warm and apparently overlies the actual reservoir; however, the lateral boundaries impounding this water probably confine geothermal fluids at depth.
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