U.S. WILDCAT SUCCESS RATE FIGURES 1946-88 REVEAL DISTURBING TREND

George G. Leckie Spanstride Ltd. Surrey, U.K. Examination of the statistics on drilling and discoveries for the U.S. 1946-88, as published by Murray in the American Association of Petroleum Geologists 1989 yearbook on World Energy Developments, reveals some puzzling trends. The data for the U.S. are the most comprehensive national statistics of this type covering a prolonged period that embraces changes in technology. The chart above, almost entirely derived from the AAPG statistics, shows:

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