ABSTRACT
In Illinois and Indiana, 4,553 wells were drilled for oil and gas in 1955, as compared with 4,181 in 1954, an increase of 9 per cent. Total oil production increased 17 per cent, from 77,813,000 barrels in 1954 to 92,008,000 barrels in 1955. Exploratory drilling increased 7 per cent, from 999 completions in 1954 to 1,075 completions in 1955.
Forty-two new pools, 91 extensions, and 41 new pays in producing areas were discovered in the two states in 1955.
As in previous years, most of the discoveries in 1955 were in Mississippian formations. Two new pools produced from Pennsylvanian sandstone, 30 from Mississippian sandstone and limestone, 6 from Devonian limestone and sandstone, and 4 from Silurian limestone.
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