| Title | Use of Seismic Imaging to Identify Geothermal Reservoirs at the Hot Pot Area, Nevada |
|---|---|
| Authors | Michael LANE, Richard SCHWEICKERT, Ted DeROCHER |
| Year | 2012 |
| Conference | Stanford Geothermal Workshop |
| Keywords | Hot Pot, Nevada, seismic reflection, geothermal reservoir, low angle thrust faults, Valmy Formation |
| Abstract | A five-line (23 mile) reflection seismic survey was conducted at the Hot Pot geothermal prospect in north-central Nevada under the USDOE (United States Department of Energy) Geothermal Technologies Program. The project objective was to utilize innovative seismic data processing, integrated with existing geological, geophysical and geochemical information, to identify high-potential drilling targets and to reduce drilling risk. Data acquisition and interpretation took place between October 2010 and April 2011. The first round of data processing resulted in large areas of relatively poor data, and obvious reflectors known from existing subsurface information either did not appear on the seismic profiles or appeared at the wrong depth. To resolve these issues, the velocity model was adjusted to include geologic input, and the lines were reprocessed. The resulting products were significantly improved, and additional detail was recovered within the high-velocity and in part acoustically isotropic basement. Features visible on the improved seismic images include interpreted low angle thrust faults within the Paleozoic Valmy Formation, which potentially are reactivated in the current stress field. Intermediate depth wells are currently targeted to test these features. The seismic images also suggest the existence of Paleogene sedimentary and volcanic rocks which potentially may function as a near-surface reservoir, charged by deeper structures in Paleozoic rocks. |