Seismic Mapping of the Subsurface Structure at the Ryepatch Geothermal Reservoir

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Description

In 1998 a 3-D surface seismic survey was conducted to explore the structure of the Rye Patch geothermal reservoir (Nevada) to determine if modern seismic techniques could be successfully applied in geothermal environments. Furthermore, it was intended to map the structural features which may control geothermal production in the reservoir. The results suggested the presence of at least one dominant fault responsible for the migration of fluids in the reservoir. In addition to the surface receivers, a 3-component seismometer was deployed in a borehole at a depth of 3900 ft within the basement below the reservoir, which recorded the waves ... continued below

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Gritto, R.; Daley, T.M. & Majer, E.L. October 1, 2000.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

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  • Geothermal Energy Program (U.S.)
    Publisher Info: DOEEEGTP (USDOE Office of Energy Efficiency and Renewable Energy Geothermal Tech Pgm)
    Place of Publication: United States

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Description

In 1998 a 3-D surface seismic survey was conducted to explore the structure of the Rye Patch geothermal reservoir (Nevada) to determine if modern seismic techniques could be successfully applied in geothermal environments. Furthermore, it was intended to map the structural features which may control geothermal production in the reservoir. The results suggested the presence of at least one dominant fault responsible for the migration of fluids in the reservoir. In addition to the surface receivers, a 3-component seismometer was deployed in a borehole at a depth of 3900 ft within the basement below the reservoir, which recorded the waves generated by all surface sources. The subject of this report is use this data set to determine the subsurface structure as a function of azimuth. A total or 2005 first arrival travel times were determined out of 2134 possible traces. 2-D ray tracing was performed to simulate wave propagation from the surface sources to the receiver at depth. The ray tracing was based on a 2-D laterally homogeneous velocity model derived from a velocity profile calculated from a VSP recorded in the same well. It was assumed that differences in travel time between the observed and modeled data are caused by structural deviations from a homogeneously layered model as determined by the VSP profile, and thus were mapped into topographic changes at depth. The results suggest an east-west-trending structure (possibly a horst) with boundaries that match the location of faults found in the analysis of the 3-D seismic surface data.

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  • Report No.: LBNL-47032
  • Grant Number: DE-AC0376SF00098
  • DOI: 10.2172/893481 | External Link
  • Office of Scientific & Technical Information Report Number: 893481
  • Archival Resource Key: ark:/67531/metadc876398

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  • October 1, 2000

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

Description Last Updated

  • Dec. 7, 2016, 9:08 p.m.

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Gritto, R.; Daley, T.M. & Majer, E.L. Seismic Mapping of the Subsurface Structure at the Ryepatch Geothermal Reservoir, report, October 1, 2000; United States. (digital.library.unt.edu/ark:/67531/metadc876398/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.