ICEGS 2013


May 27, 2013 • Potsdam, Germany

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Stress and Fracture Characterization for EGS Stimulation: The Desert Peak Project

Measurements of in-situ stresses, geometry of natural fractures, and host rock properties were used to create a geomechanical model for planning of an EGS stimulation in well 27-15 at Desert Peak, Nevada, USA. This stimulation involved injecting fluids both below and above the magnitude of the least principal stress in multiple phases over a 2-1/2 year period. This combined low- and high-pressure stimulation resulted in a 175-fold injectivity gain in well 27-15, creating a strong hydrologic connection to active geothermal wells 0.5 to 2 km to the SSW.

With the support of

Helmholtz Centre Potsdam
GFZ German Research Centre for Geosciences
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