EFFECT OF CO2 INJECTION IN RESERVOIR PERFORMANCE BY SIMULATING A COMPARATIVE SOLUTION PROJECT

Enhanced Oil Recovery (EOR) is a generic term for techniques for increasing the amount of crude oil that can be extracted from an oil field. Miscible gas injection has been identified to be the most amenable EOR process. Due to economic and availability reason, carbon dioxide (CO2) is the most potential source of gas for this process. The greatest advantage compared to other gases is that CO2 can extract heavier components up to C30. The high solubility of CO2 inhydrocarbon causes the oil to swell more and reduces its viscosity. Oil viscosity reduction and the oil swelling effect lead tomobility improvement, while the miscibility between crude oil and CO2 improves the sweep efficiency. In other words when the injected CO2 and residual oil are miscible, the physical forces holding the two phases apart (interfacial tension) effectively disappears. Usually, CO2 is not miscible at first contact with crude oils but may reach the dynamic miscibility through multiple contacts. The minimum miscible pressure (MMP) is used to indicate whether there exists miscibilitybetween crude oil and CO2 at a given pressure. In addition, zero IFT can be used to characterize the so-called complete miscibility because there is no interface between the two phases of interest under the miscible condition. This enables the CO2 to displace the oil from the rock pores, pushing it towards a producing well just as a cleaning solvent would remove oil from your tools. At the same time we have an optimal use of an environmental contaminant as a useful gas. Much discussion has centered on methods to reduce or eliminate CO2 emissions from industrial sources due to concerns over CO2 as a greenhouse gas

Keywords:

Enhanced Oil Recovery , Minimum Miscible Pressure