The project conducted extensive reservoir characterization to evaluate the potential for CO2 flooding of the reservoirs. Phase I focused on reservoir characterization of the Antelope and Brown shales, however the results indicated that very low oil saturation at Buena Vista Hills field did make it a viable candidate for CO2 recovery. Phase II was conducted at Lost Hills field. The application of state-of-the-art reservoir characterization and reservoir management? techniques attempted to establish the viability of CO2 enhanced oil recovery. The reservoir characterization phase at Buena Vista Hills field produced several firsts. The first coreflood analysis of siliceous shales compiled data from 160 wells into a database. The first high-resolution crosswell reflection images of any oil field in the San Joaquin Valley were made. The project demonstrated the first successful application of the TomoSeis acquisition system in siliceous shales. The study at Buena Vista Hills was the first detailed reservoir characterization of the Brown and Antelope siliceous shales in the San Joaquin Valley. Chevron made numerous Technology Transfer workshops, presentations and publications making knowledge of the siliceous shales available to the public for the first time. Transfer of the project to Lost Hills Field for Phase II provided the opportunity to conduct and publish a detailed reservoir characterization of the Belridge Diatomite. The Belridge Diatomite has an unusual composition and characteristics. It has high oil saturation (50%) and high porosity (45%-70%), but low permeability ? 1 millidarcy). CO2 flood production forecasts generated by Chevron's proprietary reservoir simulation software suggested that CO2 injectivity is two to three times greater than water or steam.