Preliminary Evaluation of Geothermal Potential at the Cheyenee River Sioux Reservation, South Dakota

A geochemical investigation of well waters from the Cheyenne River Sioux Reservation in South Dakota revealed considerable diversity in the chemistry of the fluids and indicated that waters from the Dakota Formation were the best candidates for direct-use geothermal applications. Geothermometry calculations for all wells suggest that formation temperatures are <90 C. Potential scaling problems from utilization of the waters would most likely be restricted to carbonate scale and could be offset by maintaining CO{sub 2} gas in solution