The Geology of Appalachian Geothermal Resources - West Virginia ...

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The Geology of Appalachian Geothermal Resources - West Virginia ...

Geology of West Virginia GeothermalResourcesMichael Hohn,Director and State GeologistRonald McDowell, Jessica Moore, and Sue PoolWest Virginia Geological and Economic Survey


Geology of West Virginia GeothermalResources• What is geothermal energy?• Why West Virginia?• Geological context• Sources of information: WV geothermalenergy website


What is Geothermal Energy?• “Heat from the Earth”• A conventional geothermal system requires heat,permeability, and water.


How Do We Produce Geothermal Energy?• Conventional geothermal systems• Geothermal Heat Pumps• Enhanced (Engineered) Geothermal Systems


Geothermal Heat Pumps• Exploit relatively constanttemperatures at 10-300 ft.depths• Do not need water orpermeability


Enhanced Geothermal Systems• “Hot Dry Rock”• Permeability created by fracturing rock atdepth• Heat extracted by circulating a fluid


Conceptual Models of Engineered (Enhanced) Geothermal Systems(Note the Depth and Temperature Ranges)Potter DrillingAltaRock Energy


Why West Virginia?


Google Earth Model of Geothermal Resource Potential for North America(Note the Depth and Temperature Ranges)


Google Earth Model of Geothermal Resource Potential for West Virginia(Note the Depth and Temperature Ranges)


Depth to Temperature: 250°FSource: ims.wvgs.wvnet.edu/WVGeothermal


Temperature at Depth: 15,000 ftSource: ims.wvgs.wvnet.edu/WVGeothermal


Temperature, Faults, and Data PointsSource: ims.wvgs.wvnet.edu/WVGeothermal


Kulander andDean, 1978


Kulander andDean, 1978


Basement Deepens to NortheastDepth inThousands ofFeetKulander and Dean, 1978


Generalized Schematic ofDetachment and ThrustingWestEastKulander and Dean, 1978


Cross-Strike Structural DiscontinuitesKulander andDean, 1978


Kulander and Dean, 1978


Are CSSD’s and Temperature Gradient Related?Source of Temperature Map: ims.wvgs.wvnet.edu/WVGeothermal


Location of Cross Section 1


DepthBelowSurfaceMarcellus5,000 ft.ReedsvilleUtica10,000 ft.15,000 ft.20,000 ft.Source of Cross Section: U.S.G.S. Scientific Investigation Map 3067


Location of Cross Section 2


DepthBelowSurfaceMarcellus5,000 ft.Utica10,000 ft.15,000 ft.20,000 ft.Source of Cross Section: U.S.G.S. Scientific Investigation Map 2985


WV Geothermal Energy Website


Interactive Map


Depth to 300°


Electricity Distribution


Kilns


Brownfields

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