The Coso EGS Project, recent developments (in International collaboration for geothermal energy in the Americas)

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Conference Proceedings: The Coso EGS Project, recent developments (in International collaboration for geothermal energy in the Americas)

Abstract
A preliminary fracture/stress analysis was conducted for the recently drilled well 38C-9 as part of a continuing effort to characterize the stress state within the east flank of the Coso geothermal field. Electric Micro Imager (EMI) data were analyzed over the logged interval of 5,881-9,408 ft. Naturally occurring fractures were analyzed in order to determine both fracture dip and azimuth. Most of the fractures dip steeply with dip azimuths approximately to the east, with a subset dipping steeply in a westerly direction. Drilling induced tensile fractures were used to determine that the orientation of the maximum horizontal stress is 14 degrees + or -16 degrees , although this is approximate as the data have to be corrected for wellbore deviation. Petrologic analyses of cuttings from several wells were used to construct a vein-mineral paragenesis of the Coso east flank. Fluid inclusion analyses of cuttings from well 83-16 were used to determine the temperatures of vein mineralization.

Authors 
Rose, P.; Barton, C.; McCulloch, J.; Moore, J.N.; Kovac, K.; Sheridan, J.; Spielman, P.; Berard and B.  








Published 
Transactions - Geothermal Resources Council, 1/1/2003





DOI 
Not Provided
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Citation

Rose, P.; Barton, C.; McCulloch, J.; Moore, J.N.; Kovac, K.; Sheridan, J.; Spielman, P.; Berard, B.  . 1/1/2003. The Coso EGS Project, recent developments (in International collaboration for geothermal energy in the Americas). Proceedings of (!) ; (!) : Transactions - Geothermal Resources Council.