Locating earthquakes in west Texas oil fields using 3-D anisotropic velocity models
- Univ. of Texas, El Paso, TX (United States). Dept. of Geological Sciences
Earthquakes within the War-Wink gas field, Ward County, Texas, that have been located with a 1-D velocity model occur near the edges and top of a naturally occurring overpressured zone. Because the War-Wink field is a structurally controlled anticline with significant velocity anisotropy associated with the overpressured zone and finely layered evaporites, the authors have attempted to re-locate earthquakes using a 3-D anisotropic velocity model. Preliminary results with this model give the unsatisfactory result that many earthquakes previously located at the top of the overpressured zone (3-3.5 km) moved into the evaporites (1-1.5 km) above the field. They believe that this result could be caused by: (1) aliasing the velocity model; or (2) problems in determining the correct location minima when several minima exist. They are currently attempting to determine which of these causes is more likely for the unsatisfactory result observed.
- OSTI ID:
- 6103729
- Report Number(s):
- CONF-9303212-; CODEN: GAAPBC
- Journal Information:
- Geological Society of America, Abstracts with Programs; (United States), Vol. 25:1; Conference: 27. annual Geological Society of America (GSA) South-Central Section meeting, Fort Worth, TX (United States), 15-16 Mar 1993; ISSN 0016-7592
- Country of Publication:
- United States
- Language:
- English
Similar Records
Review of earthquake activity and current status of seismic monitoring in the region of the Bradley Lake Hydroelectric Project, southern Kenai Peninsula, Alaska, December 1981-May 1983
Seismomagnetic effect generated by the October 18, 1989, M sub L 7. 1 Loma Prieta, California, earthquake
Related Subjects
03 NATURAL GAS
58 GEOSCIENCES
GEOPRESSURED SYSTEMS
EARTHQUAKE FOCI
EARTHQUAKES
TEXAS
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
ACCURACY
ANISOTROPY
ANTICLINES
DATA ANALYSIS
EVAPORITES
GEOGRAPHICAL VARIATIONS
GEOLOGIC MODELS
THREE-DIMENSIONAL CALCULATIONS
VELOCITY
DEVELOPED COUNTRIES
ENERGY SYSTEMS
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MINERAL RESOURCES
NORTH AMERICA
RESOURCES
ROCKS
SEDIMENTARY ROCKS
SEISMIC EVENTS
USA
VARIATIONS
020200* - Petroleum- Reserves
Geology
& Exploration
030200 - Natural Gas- Reserves
Geology
& Exploration
580000 - Geosciences