The Geochemistry of the HGP-A Geothermal Well: A Review and an Update
- Key words
- Exploration; Geochemistry; Hawaii; Kilauea Volcano; Silica; Chloride; Geothermometers; Basalt; Chemistry
- Location
- Kilauea East Rift Zone, Hawaii
- Conference
- Geothermal Resources Council Transactions
- Year
- 1987
- Session
- Exploration; Geochemical surveys; Brine chemistry; Hydrogeol
- Language
- English
Abstract
The HGP-A geothermal well located on the lower east rift system o Kilauea volcano, has provided steam and hot water to a 3MWe wellhead generator facility on a continuous basis since December 1981. Since production began there have been substantial changes in the composition of the reservoir fluids that suggest several important conclusion s regarding the HGP-A well and the reservoir associated with the Kilauea east rift zone. Among these are: that preproduction reservoir fluids have moderate to low dissolve solids concentrations; that long term fluid production can result in encroachment of heavily modified seawater into the geothermal system; and that deposition of secondary minerals from the intruding seawater may result in the obstruction and eventual sealing of the saline aquifers.
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