Self Potential Measurements At Raft River Geothermal Area (1983)

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Exploration Activity: Self Potential Measurements At Raft River Geothermal Area (1983)

Exploration Activity Details
Location Raft River Geothermal Area
Exploration Technique Self Potential Measurements
Activity Date 1983

Usefulness not indicated
DOE-funding Unknown

 
Notes
Self-potential measurements before and during injection tests at Raft River KGRA, Idaho indicate a small negative change. The magnitude of the change (5 to 10 mV) is near the noise level (5 mV) but they extend over a fairly broad area. The presence of a cathodic protection system clouds the issue of the validity of the changes, however the form of the observed changes cannot be explained by any simple change in the current strength of the protection system. Furthermore, similar changes are observed for two separate tests, months apart. Modeling of the changes indicate that they are likely caused by a fracture extending from the reservoir (1400 m) to close to the surface.


Additional References