Determination of Minimum Miscibility Pressure by Analytical Method

Document Type : Research Article


1 Department of Chemical Engineering, Tarbiat Modarres University, Tehran, I.R. IRAN

2 Research Institute of Petroleum Industry (RIPI), Tehran, I.R. IRAN



The analytical theory of one dimensional, dispersion free miscible displacement of oil by injection gas with nc component has shown that: the MMP is the lowest pressure at which any one of the initial oil, injection gas or crossover key tie lines becomes critical, which means that its length approaches to zero. In this paper, we propose a method for a solving multi component system based on analytical calculation of ternary systems, which simplifies and converts the multi component system into a pseudo ternary system and estimates the minimum miscibility pressure without solving complex and time consuming equations of crossover tie lines.


Main Subjects

[1] Danesh, A., “PVT and Phase Behavior of Petroleum Reservoir Fluids”, Academic Press., Elsevier Science, (1998).
[2] Benham, A.L., Dowden, W.E. and Kunzman, W.J., Miscible Fluid Displacement Prediction of Misci-bility, J. Pet. Tech., 219, p. 229 (1960).
[3] Pedrood, P., “Prediction of Minimum Miscibility Pressure in Rich Gas Injection”, M.Sc. Thesis, University of Tehran, Tehran, (1995).
[4] Orr, F.M., Jr. and Silva, M.K., Effect of Oil Composition on Minimum Miscibility Pressure - Part 2: Correlation, Soc. Pet. Eng. Res. Eng. J., 2, p. 479 (1987).
[5] Christiansen, R.L. and Haines, H.k., Rapid Measurement of Minimum Miscibility Pressure with Rising Bubble Apparatus, Soc. Pet. Eng. Res. J., 2, p. 523 (1987).
[6] Metcalfe, R.S., Fussell, D.D. and Shelton, J.L., A  Multicell  Equilibrium  Separation  Model  for the         Study of Multiple Contact Miscibility in Rich-Gas, Soc. Pet. Eng. J., 13, p. 147 (1973).
[7] Welge, H.J., Johnson, E.F., Ewing, S.P. and Brinkman, F.H., The Linear Displacement of Oil from Porous Media by Enriched Gas, J. Pet. Tech., 13, p. 787 (1961).
[8] Monroe, W.W., Silva, M.K., Larsen, L.L. and Orr, F.M., Jr., Composition Paths in Four-Component Systems: Effect of Dissolved Methane on 1D CO2 Flooding Performance, Soc. Pet. Eng. Res. Eng. J., 5, p. 423 (1990).
[9] Wang, Y. and Orr, F.M., Jr., Analytical Calculation of Minimum Miscibility Pressure, Fluid Phase Equilibria J., 139, p. 101 (1997).
[10] Sim, W.J, Daubert, T.E, "Prediction of Liquid-Vapor Equlibria of Undefined Mixture, Ind. Eng. Chem. Process J., 19 (3), p. 380 (1980).
[11] Riazi, M. R. and Daubert, T. E., Characterization Parameters for Petroleum Fractions, Ind. Eng. Chem. Res. J., 26 (24), p. 755 (1987).
[12] Edmister W.C., “The Applied Hydrocarbon Thermo-dynamics,” Part 4, Petroleum Refiner, 37, pp 173-179 (1958).
[13] Wang, Y. and Orr, F.M., Jr, Calculation of Minimum Miscibility Pressure, Petroleum Science and Engineering, 27 (3-4), p. 151 (2000).
[14] Hearn, C.L. and Whitson, C., Evaluating Miscible and Immiscible Gas Injection in the Safah Field, Oman, paper SPE 29115 presented at the 13th SPE Symposium on Reservoir Simulation, San Antonio, TX, USA (1995).