. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. 85 1990 Figure 16 Oil production per well per day. Innovation and research in oil production technology are urgently needed because current practices leave about 60% of known oil in the ground. Reservoir hetero- geneity and other unfavorable geologic factors cause the loss of large quantities of oil reserves in the state at a time when more than 90% of the state's oil needs have to be met by out-of-
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. 85 1990 Figure 16 Oil production per well per day. Innovation and research in oil production technology are urgently needed because current practices leave about 60% of known oil in the ground. Reservoir hetero- geneity and other unfavorable geologic factors cause the loss of large quantities of oil reserves in the state at a time when more than 90% of the state's oil needs have to be met by out-of-state or overseas sources. About 1960, when the brief surge in Illinois' oil produc- tion was foundering, oil consumption in the state was rapidly rising (fig. 17), up nearly 70% in less than 20 years. A temporary drop in consumption was observed after the 1973-1974 oil price increase. Because of the lead time required to respond to higher oil prices, con- sumption of oil in Illinois continued to increase during 1976-1978, but was already on the decline when another oil price hike hit world markets in 1980 and 1981. Since 1982, oil consumption in Illinois has aver- aged about 225 million barrels per year, as compared with the 1978 high of about 335 million barrels. 1935 40 45 50 55 60 65 70 75 80 85 1990 Figure 15 Annual crude oil production in 1960 Figure 17 Oil consumption in Illinois. 14. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Dept. of Energy and Natural Resources; Critical Trends Assessment Project. Springfield, Ill. : Ill. Dept. of Energy and Natural Resources
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