In all, 3,571 wells were drilled for oil and gas in Illinois and Indiana in 1948 as compared with 2,727 in 1947, an increase of 31 per cent. Total oil production decreased a fraction of 1 per cent from 72,901,000 barrels in 1947 to 72,480,000 barrels in 1948. Wildcat drilling increased from 792 completions in 1947 to 955 completions in 1948. Fifty-one new pools, 63 extensions, and 48 new producing zones were discovered in the two states in 1948.

Most of the discoveries in 1948 were in Mississippian formations but the Devonian limestone produced oil in five new pools, three in Indiana (Spring Hill in Vigo County and Wilfred and Marts in Sullivan County), and two in Illinois (Assumption and Assumption North, both in Christian County).

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First page of Developments in Illinois and Indiana in 1948<xref ref-type="fn" rid="fn1"><sup>1</sup></xref>
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