1,578 wells drilled in 1981, an increase of 13.5% over 1980. The total footage drilled exceeds 18 million ft with a per well average depth of 11,568 ft. Wildcat wells numbered 319, other exploratory wells numbered 318, and development wells numbered 941. The successful completion rate includes the following: 8% for wildcat wells, 33% for other exploratory tests, and 54% for development wells. Wildcat wells discovered 26 new fields, 7 more than in 1980. Leasing activity totaled 1,766,536 acres, an 18% increase over 1980. Three carbon dioxide-enhanced oil recovery projects were initiated in onshore south Louisiana fields.--Modified journal abstract

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