New opportunities in the mature fields of the central Illinois Basin : a case study of the Mode field, Shelby County, IL, USA
Wells that produce less than 10 barrels of oil per day account for up to 96% of the Illinois Basin’s (ILB) total production. Little has been done to study the potential exploitation of unswept mobile or immobile oil through improved recovery in the Illinois Basin in a systematic field-by-field study. Department of Energy (DOE) data resource appraisals indicate that 2 billion barrels of bypassed mobile oil and more than 5.4 billion barrels of immobile oil are potential targets for future exploitation in the Illinois Basin. Heterogeneities in the basin’s reservoirs and standardized well spacing ...
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