In this project, Oxy USA, Inc., is demonstrating the advantages of applying advanced reservoir management techniques, hydraulic fracturing and cyclic CO2 stimulation to improve the economics and efficiencies of CO2 floods in previously waterflooded carbonate reservoirs in the Permian Basin of West Texas. Working in the South Welch Unit, Oxy used advanced three-dimensional seismic imaging and log and core analysis to obtain a thorough description of the San Andres Formation reservoir to assist in the design of the most effective recovery processes Fractures were created by injecting pressurized fluids into the reservoir strata to provide gas injection efficiency. The length and orientation of the fractures were determined to design the most efficient reservoir fluid flow patterns.