The objective of this project is to significantly improve oil recovery at Eucutta Field, Wayne County, Mississippi and Little Creek Field, Lincoln and Pike counties, Mississippi by combining an established procedure, carbon dioxide water-after-gas (WAG) flood, with a new technology, microbial permeability profile modification (MPPM), developed at Mississippi State University (MSU) under prior DOE contract. Simply stated, the MPPM technology utilizes environmentally friendly nutrient solutions to simulate the growth of the indigenous microflora in the most permeable zones of the reservoir, thereby forcing water or carbon dioxide to divert to less permeable, previously unswept zones of the reservoir.