An Analysis of Reservoir Production Strategies in Miscible and Immiscible Gas Injection Projects
Successful design and implementation of a miscible gas injection project depends upon the minimum miscibility pressure (MMP) and other factors such as reservoir and fluid characterization. The experimental methods available for determining MMP are both costly and time consuming. Therefore, the use of correlations that prove to be reliable for a wide range of fluid types would likely be considered acceptable for preliminary screening studies. This work includes a comparative evaluation of MMP correlations and thermodynamic models using an equation of state by PVTsim software (Schlumberger, 2001a). We observed that none of the evaluated MMP correlations studied in this investigation is sufficiently reliable. EOSbased analytical methods seemed to be more conservative in predicting MMP values. Following an acceptable estimate of MMP, several compositional simulation runs were conducted to determine the sensitivity of the oil recovery to variations in injection pressure (at pressures above, equal to and below the estimated MMP), stratification and mobility ratio parameters in miscible and immiscible gas injection projects. Simulation results indicated that injection pressure was a key parameter that affects oil recovery to a high degree. MMP determined to be the optimum injection pressure. Stratification and mobility ratio could also affect the recovery efficiency of the reservoir in a variety of ways.
Key words: Reservoir production; Miscible gas injection; Immiscible gas; Minimum miscibility pressure
 Alston, R. B., Kokolis, G. P., & James, C. F. (1985). CO2 Minimum Miscibility Pressure: A Correlation for Impure CO2 Streams and Live Oil Systems. SPE Journal, 25(2), 268-274.
 Benham, A.L., Dowden, W.E., & Kunzman, W.J. (1960). Miscible Fluid Displacement-Prediction of Fluid Miscibility. Petroleum Transactions, AIME, 219, 229-237.
 Cook, A.B., Walter, C.J., & Spencer, G.C. (1969). Realistic K-Values of C7+ Hydrocarbons for Calculating Oil Vaporization During Gas Cycling at High Pressure. JPT, 21(7), 901-915.
 Eakin, B.E., & Mitch, F.J. (1988). Measurement and Correlation of Miscibility Pressure of Reservoir Oils. SPE 18065, Presented at the Annual Technical Conference and Exhibition, 2-5 Oct, 1988, Houston, TX.
 Firoozabadi, A., & Aziz, K. (1986). Analysis and Correlation of Nitrogen and Lean-Gas Miscibility Pressure. SPE J., 1(6), 575–582.
 Glasø, Ø. (1980). Generalized Pressure-Volume-Temperature Correlations. Journal of Petroleum Technology, 32(5), 785-795.
 Glasø, Ø. (1985). Generalized Minimum Miscibility Pressure Correlation. SPE 12893. Presented at the SPE Annual Technical Conference and Exhibition. Dec. 1985, San Antonio, TX.
 Johns, R. T., Dindoruk, B., & Orr, F. M., Jr. (1993). Analytical Theory of Combined Condensing/Vaporizing Gas Drives. SPE Adv. Tech. Ser., 2(3), 7-16.
 Kay, W. B. (1936). Density of Hydrocarbon Gases and Vapors at High Temperatures and Pressure. Ind. Eng. Chem., 28(9), 1014-1019.
 Metcalfe, R. S., Fussell, D. D., & Shelton, J. L. (1972). A Multicell Equilibrium Separation Model for the Study of Multiple Contact Miscibility in Rich-gas Drives. SPE 3995. Presented at the SPE Annual Technical Conference and Exhibition 8-11 Oct 1972, San Antonio, TX.
 Monroe, W. W., Silva, M. K., Larsen, L. L., & Orr Jr., F. M. (1990). Composition Paths in Four- Component Systems: Effect of Dissolved Methane on 1-D CO2 Flood Performance. SPE Res. Eng., 5(3), 423-432.
 Orr Jr., F. M., & Silva, M.K. (1987). Effect of Oil Composition on Minimum Miscibility Pressure-Part 2-Correlation. SPE Res. Eng., 2(4), 479-487.
 Schlumberger. (2001a). PVTsim, version 12 user’s guide: Calsep Inc. Houston, TX.
 Schlumberger. (2001b). Eclipse, version 2001A user’s guide: Calsep Inc. Houston, TX.
 Sebastian, H.M., Wenger, R.S., & Renner, T.A. (1985). Correlation of Minimum Miscibility Pressure for Impure CO2 Streams. Journal of Petroleum Technology, 37(11), 2076-2082.
 Stalkup, F. I. (1987). Displacement Behavior of the Condensing/Vaporizing Gas Drive Process. SPE 16715. Presented at the SPE Annual Technical Conference and Exhibition. 27-29 Sep 1987, Dallas, TX.
 Zick, A.A. (1986). A Combined Condensing-Vaporizing Mechanism in the Displacement of Oil by Enriched Gases. SPE 15493. Presented at the SPE Annual Technical Conference and Exhibition. 5-8 Oct 1986, New Orleans, LA.
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