ABSTRACT
In Illinois 1,922 wells were drilled for oil and gas in 1960, a decrease of 5% compared with the 2,032 total in 1959. These figures are exclusive of water- or gas-input wells, salt-water disposal wells, and old wells worked over.
Exploratory drilling increased 23.6% from 535 wells3 in 1959 to 661 in 1960. Eleven new pools, 43 extensions, and 26 new pays in pools were discovered in 1960. Total oil production increased from 76,727,000 bbls. in 1959 to 77,341,000 bbls. in 1960.
Of the 11 new pools discovered in 1960, 5 oil pools and 1 gas pool produced from Mississippian sandstones and limestones, 2 oil pools from limestone of Devonian age, and 3 from carbonates of Silurian age.
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