| Title | Mise-A-La-Masse Mapping of the HGP-A Geothermal Reservoir, Hawaii |
|---|---|
| Authors | Kauahikaua, James; Mattice, Mark; Jackson, Dallas |
| Year | 1980 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Exploration; USA; Hawaii; Puna; Geophysical Survey; Electrical Conductivity |
| 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. |