Snake River Plain Idaho Geothermal Exploration Well

Abstract

Geology and geophysical data collected by the USGS, and test drilling by DOE indicates a potential moderate temperate geothermal resource beneath the eastern Idaho Snake River Plain (SRP). Young volcanics of the SRP could be supplying heat at depth. This, tied with structural controls of the SRP, is thought to provide hydrothermal resources at reasonable drilling depths. Based on these data, a drill site was selected on the Idaho National Engineering Laboratory (INEL) west of Idaho Falls, ID. Drilling began in February 1979 and completed May 27, 1979 to a total depth of 10,351 feet. At completion, bottomhole temperatures was nearly 300°F. The well is artisian pressured, but not flowing. Testing, coring and logging were performed on selected intervals during drilling. Well flow capabilities and maximum production temperatures should be determined when the tests are completed in late July 1979. If successful, the well will be used for process and space heat at INEL.