Simulation Study On Carbon Dioxide Enhanced Oil Recovery

Carbon dioxide injection, with the development of carbon dioxide capture technology, is regarded as a promising method for enhanced oil recovery (EOR). Miscible flooding of carbon dioxide EOR theoretically provides a high recovery factor. However, there exists a minimum pressure requirement to achieve miscible flooding, which is minimal miscible pressure (MMP). The study in this paper investigates the carbon dioxide flooding based on simulation. The feasibility of reducing minimal miscible pressure by enriching the injected carbon dioxide is first analyzed through phase behavior simulation. Then, a carbon dioxide flooding test has been simulated and compared with real laboratory data. The sensitive parameters in carbon dioxide flooding were ranked in sensitivity analysis and updated through inverse history matching. The updated relative permeability curves not only reflect a residual oil saturation reduction due to the carbon dioxide interacting with a fluid but also reduce the uncertainty of measurement in laboratory tests.