Conceptual Model At Raft River Geothermal Area (2011)

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Exploration Activity: Conceptual Model At Raft River Geothermal Area (2011)

Exploration Activity Details
Location Raft River Geothermal Area
Exploration Technique Conceptual Model
Activity Date 2011

Usefulness not indicated
DOE-funding Unknown

Exploration Basis
Explore for development of an EGS demonstration project
The reservoir is developed in fractured Proterozoic schist and quartzite, and Archean quartz monzonite cut by younger diabase intrusions. The basement complex was deformed during the mid Tertiary and covered by approximately 5000 ft of late Tertiary sedimentary and volcanic deposits. Listric normal faults of Cenozoic age disrupt the Tertiary deposits but do not offset the basement rocks. RRG-9, the target well, was drilled southwest of the main well field to a measured depth (MD) of 6089 ft. The well is deviated to the west and cased to a depth of 2316 ft MD. It penetrated the Proterozoic reservoir rocks at a depth of 5286 ft MD and encountered a maximum temperature of 1390 C. Bottomhole temperatures in other deep wells range from 133 to 149 0C.


Additional References