North Texas′ Hardeman Basin contains a number of prolific Mississippian carbonate oil fields discovered mainly in the last ten years. A statistical study of reserves and success rates has been made of nearly all the wells drilled in Hardeman County, including the shallower formations. The study shows the primary Mississippian objectives have a current success rate of 18% and will average 169,500 bbl (26,948 m3) per well; uneconomic at present oil prices and costs.

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