Marble Falls horizontal oil play developing in Fort Worth basin

James D. Henry Old Aulacogen LP Frisco, Tex. At about the time in the mid-20th century that the Fort Worth basin of North Central Texas was being abandoned by the major oil companies as a worn-out backwater area, a young man named George Mitchell began drilling there for Pennsylvanian-age Atokan (aka Boonesville Bend) sandstones and conglomerates. Mitchell Energy eventually became the largest independent oil and gas company in Texas, and George Mitchell became a billionaire. By 1980 the Atoka had been pretty well exhausted. George Mitchell began drilling deeper gas wells in the late Mississippian Barnett shale and experimenting with massive frac jobs and new stimulation techniques. By the...

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