In Illinois and Indiana, 3,473 wells were drilled for oil and gas in 1953, as compared with 3,357 in 1952, an increase of 3 per cent. Total oil production decreased ½ of 1 per cent, from 72,008,000 barrels in 1952 to 71,606,000 barrels in 1953. Exploratory drilling decreased from 1,181 completions in 1952 to 949 in 1953. Forty-nine new pools, 63 extensions, and 20 new producing zones were discovered in the two states in 1953.

As in previous years, most of the discoveries in 1953 were in Mississippian formations. Six new pools produced from Pennsylvanian sandstones, 3 from Devonian or Silurian limestones, and 1 from Ordovician limestone.

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First page of Developments in Illinois and Indiana in 1953<xref ref-type="fn" rid="fn1"><sup>1</sup></xref>
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