GEOTHERMAL ASSESSMENT Geophysical Techniques M. Batzle, Colorado School of Mines.

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Presentation transcript:

GEOTHERMAL ASSESSMENT Geophysical Techniques M. Batzle, Colorado School of Mines

GENERALIZED GEOTHERMAL SYSTEM HEAT SOURCE Hot Springs COLD WATER FLOW HOT WATER FLOW FRACTURE ZONE PERMEABLE BEDS IMPERMEABLE BEDS CRYSTALLINE ROCKS ALTERED / MINERALIZED

GEOTHERMAL ASSESSMENT with GEOPHYSICAL TECNIQUES TECHNIQUE INFORMATION ResistivityFluid Content SP Fluid Motion GravityStructure SeismicsStructure BoreholeLithology, Temperature, Flow

Gauss Newton Inversion algorithm

Seismic Acquisition

2009 E-W SEISMIC LINE W E

W E ? Eocene Unconformity ? Volcanics Mt. Princeton Granite Dry Union Fm PreCambrian Granite

2009 E-W SEISMIC LINE W E ? Proposed Well Path

Mt Princeton Hot Springs 2009 Seismic Line Passive Seismic Stations State Land Board Property County Roads Federal USFS/BLM Deep Seismic Lines Proposed 2008 Seismic Line Area of 3-D SP & Seismic Surveys Source: Chaffee county recreational map, 2004 N 1 mile Potential Injection Well Maxwell Park Potential Production Well Potential Return Pipeline Potential Hot Pipeline Potential Power Plant Correctional Facility

Pagosa Springs Seismic Line A. Lozier, et al. 2013

Pagosa Springs Preliminary Interpretation A. Lozier, et al. 2013

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