Cross-Dipole Acoustic Log At Alum Area (Moos & Ronne, 2010)

From Open Energy Information

Exploration Activity: Cross-Dipole Acoustic Log At Alum Area (Moos & Ronne, 2010)

Exploration Activity Details
Location Alum Geothermal Area
Exploration Technique Cross-Dipole Acoustic Log
Activity Date
Usefulness useful
DOE-funding Unknown

A crossed-dipole acoustic log detected stress induced anisotropy in the sediments, and also appeared to be able to identify and orient steeply dipping, compliant and therefore possibly conductive fractures in basement rocks. Because the shear-wave velocity was extremely low throughout most of the sedimentary section dipole data was required for its determination. The analysis results, which included a stress determination based on an extended leakoff test to determine SHmin and observations of intermittent breakouts and tensile fractures, revealed a normal faulting environment, with SHmax oriented in the strike direction of the fault and of the dipping sediments.

Additional References