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Slimtube experiments are used as a determination of Minimum Miscibility Pressure (MMP) for different Enhanced Oil Recovery (EOR) techniques. It is the most reliable technique available for MMP determination. Since slimtube experiments are time consuming, simulation of the process is highly beneficial for fast determination of MMP. This article presents a new set of slimtube simulations to obtain MMP of pure hydrocarbons by CO 2. Pure hydrocarbons are subjected to CO 2 flooding in slimtube simulationsat different temperatures. Pure hydrocarbons MMP cannot be determined by present correlations used in petroleum industry. At the end, CO 2 MMP for each pure hydrocarbon up to C8 is obtained in temperatures varying from 15 to 70°C. As liquid CO 2 is also used in these simulations, it showed that by using liquid CO 2, the dependency of MMP to molecular weight of hydrocarbon will be decreased and usage of liquid CO 2 will yield almost same result for all pure hydrocarbons used in this research.

CO<sub>2</sub> Minimum Miscibility Pressure Determination of Pure Hydrocarbons in Different Temperatures Using Slimtube Simulations