The oil and gas producing region of Illinois has nearly 6 billion barrels of oil which will be left in the ground, or "stranded", following the use of today's oil recovery practices. A major portion of this "stranded oil" is in reservoirs technically and economically amenable to enhanced oil recovery (EOR) using carbon dioxide (CO2) injection. This report evaluates the future oil recovery potential in the large oil fields of Illinois and the barriers that stand in the way of realizing this potential. The report then discusses how a concerted set of "basin-oriented strategies" could help the region's oil production industry overcome these barriers.