Understanding Constraints on Geothermal Sustainability Through Reservoir Characterization at Brady Geothermal Field, Nevada PattersonMSThesis2018.pdf

The vast supply of geothermal energy stored throughout the Earth and the exceedingly long time required to dissipate that energy makes the world's geothermal energy supply nearly limitless. As such, this resource holds the potential to provide a large supply of the world's energy demands; however, like all natural resources, it must be utilized in an appropriate manner if it is to be sustainable. Understanding sustainable use of geothermal resources requires thorough characterization efforts aimed at better understanding subsurface properties. The goal of this work is to understand which critical subsurface properties exert the most influence on sustainable geothermal production as a means to provide targeted future resource characterization strategies.

Borehole temperature and reservoir pressure data were analyzed to estimate reservoir thermal and hydraulic properties at an active geothermal site. These reservoir properties then served as inputs for an analytical model which simulated net power production over a 30-year period. The analytical model was used to conduct a sensitivity analysis to determine which parameters were most critical in constraining the sustainability of a geothermal reservoir. Modeling results reveal that the number of preferential flow pathways (i.e. fractures) used for heat transport provides the greatest impact on geothermal reservoir sustainability. These results suggest that early and pre-production geothermal reservoir exploration would achieve the greatest benefit from characterization strategies which seek to delineate the number of active flow pathways present in the system. M.S. Thesis written by Jeremy R. Patterson focused on thermal and hydraulic characterization at Brady Geothermal Field supporting the PoroTomo project.

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Citation Date 2018-07-11T00:00:00-06:00

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Original ID f0000000-58cc-4372-a567-000000001077
Index Date 2018-08-23T13:24:31-06:00
Original Format ISO-USGIN
Original Version 1.2


Name Jeremy Patterson
Position primary contact
Organization University of Wisconsin
Email jpatterson7@wisc.edu

Geographic Extent

North Bound 39.9883
South Bound 39.5883
East Bound -118.8167
West Bound -119.2167