The East Texas Basin and southeastern Texas Gulf Coast contain a variety of co-located CO 2 sources and sinks that may facilitate development of new clean-coal facilities. These facilities can be linked to mature oil fields with potential for enhanced oil recovery (EOR) from miscible CO 2 floods. Twenty-three reservoirs in the East Texas Basin and southeastern Texas Gulf Coast, assuming a 15% recovery factor of original oil in place (OOIP), have a CO 2 -EOR potential for recovery of $9,697,000 m 3 [$62.2 million stock tank barrels] of oil. A network of new CO 2 pipelines can link these fields to existing power plants near lignite mine mouths in east and southeast Texas. Representative oil fields in the Woodbine Group illustrate fluvial and deltaic facies variability and different sandstone-body architectures with varying controls on potential CO 2 capacity. Reservoir heterogeneity, fluid flow, hydrocarbon production, and potential CO 2 capacity in the Woodbine Group in the structurally simple East Texas field are mainly a function of facies architecture. The Woodbine Group in East Texas field contains a lower section of narrow and lenticular sandstone bodies in a fluvially dominated deltaic system. Pressure and production data indicate that additional oil recovery in the lower Woodbine deltaic section in East Texas field is low in muddy, low-permeability prodelta, and distal-delta-front facies. In contrast, oil recovery is greater in sandy distributary-channel sandstones. Core-plug data show that distributary-channel and channel-mouthbar sandstones in the field have high median-permeability values, and therefore a greater potential for CO 2 capacity. These deltaic deposits are overlain disconformably by an upper section of continuous, coarse-grained fluvial deposits that favor high CO 2 capacity owing to Darcy-class permeability and extensive vertical and lateral reservoir continuity. In contrast, Woodbine fields in southeast Texas represent distal-deltaic facies. CO 2 capacity and EOR potential in these fields are limited by thin distributary-channel and crevasse-splay deposits that contain abundant mudstone beds that may serve to segregate-injected CO 2 into small reservoir compartments.
