Overview of the Terra Tek Geothermal Rock Mechanics Program

Abstract

The lack of geothermal material property data at simulated in situ conditions has been identified as a major obstacle to the development and commercialization of geothermal resources. A test facility was designed and constructed to specifically meet the geothermal community's data requirements in the areas of surface exploration, subsurface evaluation (logging), drilling, stimulation, reservoir engineering and subsidence. Testing capabilities include confining and pore fluid pressures to 200 MPa and temperatures in excess of 500°C. Sample sizes to 10.2 cm can be accommodated. Available test programs include: mechanical response (with axial and transverse strains), thermal conductivity, thermal diffusivity, thermal expansion, permeability, electrical resistivity and ultrasonic velocities.