Developing a 3-D Seismic-Attribute Framework Model of Yucca Flat, Nevada National Security Site
- National Security Technologies, LLC. (NSTec), Mercury, NV (United States)
- GeoHydros, LLC
Using data collected during underground nuclear testing in Yucca Flat at the Nevada National Security Site, an existing 3-D hydrostratigraphic framework model (HFM) that was developed for groundwater modeling is being converted to a 3-D seismic-attribute framework model (SFM). The resulting SFM can be used to better understand seismic wave propagation from underground chemical explosive tests planned for Yucca Flat as part of the Source Physics Experiment. The Yucca Flat HFM covers 1,250 square kilometers and depicts the distribution of subsurface geologic units, called hydrostratigraphic units, according to their ability to transmit groundwater. Many of the rock properties and geologic structures that control groundwater flow also influence seismic wave transmission, so the team reasoned that the HFM could be modified to create an SFM. Existing geologic and geophysical data, including interval velocity measurements from down-hole seismic surveys conducted in 188 holes across Yucca Flat, were used to evaluate the HFM and develop a 3-D velocity property model. The velocity model was integrated with the HFM so that unit volumes within the HFM could be evaluated according to their seismic character. Results to date show, as anticipated, that most of the 3-D hydrostratigraphic unit volumes in the HFM can function as seismic-stratigraphic unit volumes. Thus, with relatively minor modifications, the HFM can be converted to an SFM.
- Research Organization:
- Nevada Test Site (NTS), Mercury, NV (United States)
- Sponsoring Organization:
- USDOE NA Office of Nonproliferation and Verification Research and Development (NA-22)
- DOE Contract Number:
- DE-AC52-06NA25946
- OSTI ID:
- 1241548
- Report Number(s):
- DOE/NV/25946-2409
- Resource Relation:
- Conference: Seismological Society of America www.seismosoc.org/meetings/2015, Pasadena, CA, 21 - 23 April 2015
- Country of Publication:
- United States
- Language:
- English
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