Abstract
A total of 4,784 wells was drilled during 1965, 531 of which were exploratory wells. One hundred fifty-nine new fields were found. The greatest concentration of wildcat activity was on the northern flank of the Anadarko basin; Pennsylvanian, Mississippian, and Siluro-Devonian rocks are the principal objectives in that area. Elsewhere, discoveries were made in every Paleozoic system except the Cambrian. Most discoveries were in the Pennsylvanian. Of all discoveries, 55% were in sandstone and 37% were in limestone. The very high wildcat success ratios in this district are considered to be the result of the widespread application of geology and geophysics.
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