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Reprinted from Hart Publications, Inc.
August 1988
Mammoth Geo Inc., Barrackville, W. Va., has completed its
phase of the Offset Well Test Facility project for the BDM Corp. BDM is
under contract to the U.S. Department of Energy's Morgantown Energy
Technology Center.
Mammoth's work consisted of remote sensing natural
fracture mapping of 38,000 acres in Whitley County, Ky. Landsat satellite
imagery, National High Altitude Photography and Side Looking Airborne Radar
imagery were used in the mapping. More than 1.2 million linear feet of
potential natural fractures were mapped. Natural fracture density contour,
rose diagrams and 6th degree trend surface maps were constructed to aid in
the natural fracture analysis. Earth Resistivity Profiling Surveys (ERPS)
were run over a distance of 2380 ft. The geophysical survey mapped and
confirmed 12 natural fracture zones. Near-surface soil gas geochemical
survey samples were taken every 50 ft along the ERPS geophysical survey. Six
positive geochemical anomalies were identified in the geochemical survey
data. Three of the geochemical anomalies were identified as related to
natural fracture zones. Overall there was a positive correlation between the
remote sensing, geophysical and geochemical data.
Mammoth also surveyed locations for 12 tiltmeter sites,
constructed the sites, assisted with tiltmeter installation, derigged and
reclaimed the sites. The tiltmeters were used to detect and measure minute
movements in the earth caused by hydraulic fracturing in a nearby well.
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