MISSISSIPPIAN 'WARSAW' PLAY MAKES WAVES IN ILLINOIS BASIN

01/09/1995
Zakaria Lasemi, John P. Grube Illinois State Geological Survey Champaign Recent completions of relatively prolific wells in the mid-Mississippian Ullin limestone (Fig. 1) (19015 bytes) have generated considerable excitement about this Illinois basin play. Reservoirs found within this limestone, commonly referred to by industry as the "Warsaw," are scattered (Fig. 2) (18434 bytes) and are prolific oil producers in some areas of the basin. The widespread development of reservoir quality facies at depths ranging from 2,400-4,400 ft and the stratigraphic proximity of thermally mature New Albany shale, the primary Illinois basin source rock, are f...
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