Empirical Study of Minimum Miscibility Pressure Determination of CO2 and Associate Gas in Iranian Off-shore Oil

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Esmaeili Rad, Farnaz | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 45912 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Tghikhani, Vahid; Ghotbi, Cyrus; Badakhshan, Amir
Abstract:
The main EOR method after heat recovery is gas injection. Minimum miscibility pressure is one of the parameters that affect gas injection. This project includes computational and laboratory sections to estimate the MMP. The MMP were estimated during the injection of CO2, Ga, Gb and methane gases into two oil samples. In the computational part of the project, MMP is estimated through cell to cell simulation and using Peng_Robinson equation of state. Also, the MMP is measured by using slim tube apparatus which is used so widely in the industry. According to the results, CO2 has the lowest miscibility pressure among other gases. It was miscible into oil even at pressures near the bubble pressure and the oil production efficiency was achieved higher than 90%. Due to the MMPs obtained for Ga and Gb gases, Ga gas gets miscible at lower pressure compared with the Gb gas. Methane has the highest MMP among gases which are injected. The error of the calculation method was 9.54 for Ga gas nad A oil, 0.92 for Gb gas and A oil and it was 3.86 for methane and B oil
Keywords:
Minimum Miscibility Pressure (MMP) ; Cell to Cell Simulation ; Slimtube Test

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