Positive factors dominate negatives for Illinois basin coalbed methane

03/31/2003
Positive factors dominate negatives for Illinois basin coalbed methaneThe Illinois basin is an elliptical, intracratonic basin that covers 34 million acres in Illinois, southwestern Indiana, and western Kentucky (Fig. 1). Click here to enlarge imageAll coals of economic interest are found in the Pennsylvanian age strata in which 75 individual seams have been identified and of which 20 have been actively mined since the 1800s. The coals that have potential for gas production are found in the Middle and Upper Lower Pennsylvanian rocks of the Carbondale and Spoon formations.The coals vary in thickness from a few inches to more than 15 ft. They vary in rank from high volatile A in the southe...
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