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Reprinted from Hart Publications, Inc.
April 1990
Paving the way for a horizontal well, Mammoth Geo Inc.,
Barrackville, W. Va., has completed geophysical surveys for the U.S.
Department of Energy's Morgantown Energy Technology Center (METC).
Mammoth's work consisted of 5430 ft of dual-depth,
tri-potential earthresistivity geophysical surveys. The surveys mapped and
delineated natural fracture systems in the vicinity of the HW-1 Hardy
horizontal well, in Elmwood Quadrangle, Putnam County, W.Va.
The well, a joint venture between the DOW and Cabot Oil
& Gas Corp., was spudded in December 1989 with a planned horizontal
reach of 2000 ft in the Upper Devonian, Brallier Shale, at a vertical depth
of 4500 ft. Mammoth's resistivity survey mapped 21 well-defined natural
fracture zones ranging from near vertical to 75° orientation.
Additional work for the project included the remote
sensing lineament mapping of the Elmwood Quadrangle. More than 365 mi of
potential natural fracture zones were mapped from Side Looking Airborne
Radar and National High Altitude Photography.
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