Phase Behavior and Minimum Miscibility Pressure in Nanopores
- Tadesse Weldu Teklu (Colorado School of Mines) | Najeeb Alharthy (Colorado School of Mines) | Hossein Kazemi (Colorado School of Mines) | Xiaolong Yin (Colorado School of Mines) | Ramona M. Graves (Colorado School of Mines) | Ali M. AlSumaiti (The Petroleum Institute)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- August 2014
- Document Type
- Journal Paper
- 396 - 403
- 2014.Society of Petroleum Engineers
- 5.2.1 Phase Behavior and PVT Measurements, 5.2 Reservoir Fluid Dynamics
- unconventional nanopore reservoirs, critical temperature and critical pressure shift, minimum miscibility pressure, capillary pressure, phase behavior
- 21 in the last 30 days
- 1,206 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 10.00|
|SPE Non-Member Price:||USD 30.00|
Numerous studies indicate that the pressure/volume/temperature (PVT) phase behavior of fluids in large pores (designated "unconfined" space) deviates from phase behavior in nanopores (designated "confined" space). The deviation in confined space has been attributed to the increase in capillary force, electrostatic interactions, van der Waals forces, and fluid structural changes. In this paper, conventional vapor/liquid equilibrium (VLE) calculations are modified to account for the capillary pressure and the critical-pressure and -temperature shifts in nanopores. The modified VLE is used to study the phase behavior of reservoir fluids in unconventional reservoirs. The multiple-mixing-cell (MMC) algorithm and the modified VLE procedure were used to determine the minimal miscibility pressure (MMP) of a synthetic oil and Bakken oil with carbon dioxide (CO2) and mixtures of CO2 and methane gas. We show that the bubblepoint pressure, gas/oil interfacial tension (IFT), and MMP are decreased with confinement (nanopores), whereas the upper dewpoint pressure increases and the lower dewpoint pressure decreases.
|File Size||1 MB||Number of Pages||8|
Ahmadi, K. and Johns, R.T. 2011. Multiple-Mixing-Cell Method for MMP Calculations. SPE J. 16 (4): 733–742. SPE-116823-PA. http://dx.doi.org/10.2118/116823-MS.
Alharthy N., Nguyen T.N., Teklu T.W. et al. 2013. Multiphase Compositional Modeling in Small-Scale Pores of Unconventional Shale Reservoirs. Presented at SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, 30 September–2 October. SPE-166306-MS. http://dx.doi.org/10.2118/166306-MS.
Bird, R.B., Stewart, W.E., and Lightfoot, E.N. 2007. Transport Phenomena. Revised second edition, John Wiley & Sons.
Brusilovsky, A.I. 1992. Mathematical Simulation of Phase Behavior of Natural Multicomponent Systems at High Pressures With an Equation of State. SPE Res Eval & Eng 7 (1): 117–122. SPE-20180-PA. http://dx.doi.org/10.2118/20180-PA.
Christiansen, R.L. and Haines, H.K. 1987. Rapid Measurement of Minimum Miscibility Pressure With the Rising-Bubble Apparatus. SPE Res Eval & Eng 2 (4): 523527. SPE 13114. http://dx.doi.org/10.2118/13114-PA.
Danesh, A. 1998. PVT and Phase Behaviour of Petroleum Reservoir Fluids. Vol. 47. Elsevier.
Devegowda, D., Sapmanee, K., Civan, F. et al. 2012. Phase Behavior of Gas Condensates in Shales Due to Pore Proximity Effects: Implications for Transport, Reserves and Well Productivity. Presented at Annual Technical Conference and Exhibition, San Antonio, Texas, 8–10 October. SPE-160099-MS. http://dx.doi.org/10.2118/160099-MS.
Firincioglu, T., Ozkan, E., and Ozgen, C. 2012. Thermodynamics of Multiphase Flow in Unconventional Liquids-Rich Reservoirs. Presented at SPE Annual Technical Conference and Exhibition, San Antonio, Texas, 8–10 October. SPE-159867-MS. http://dx.doi.org/10.2118/159867-MS.
Jaubert, J.N., Wolff, L., Neau, E. et al. 1998. A Very Simple Multiple Mixing Cell Calculation to Compute the Minimum Miscibility Pressure Whatever the Displacement Mechanism. Ind. Eng. Chem. Res. 37 (12): 4854–4859. http://dx.doi.org/10.1021/ie980348r.
Luks, K.D., Turek, E.A., and Baker, L.E. 1987. Calculation of Minimum Miscibility Pressure. SPE Res Eng 2 (4): 501–506. SPE-14929-PA. http://dx.doi.org/10.2118/14929-PA.
Metcalfe, R.S., Fussell, D.D., and Shelton, J.L. 1973. A Multicell Equilibrium Separation Model for the Study of Multiple Contact Miscibility in Rich-Gas Drives. SPE J. 13 (3): 147–155. SPE-3995-PA. http://dx.doi.org/10.2118/3995-PA.
Morishige, K., Fujii, H., Uga, M. et al. 1997. Capillary Critical Point of Argon, Nitrogen, Oxygen, Ethylene, and Carbon Dioxide in MCM-41. Langmuir 13 (13): 3494–3498. http://dx.doi.org/10.1021/la970079u.
Neoschil, J. and Chambrette, P. 1978. Converge Pressure Concept a Key for High Pressure Equilibria, SPE 7820 (submitted to SPE, not published but available in the eLibrary).
Nojabaei, B., Johns, R.T., and Chu, L. 2013. Effect of Capillary Pressure on Phase Behavior in Tight Rocks and Shales. SPE Res Eval & Eng 16 (3): 281–289. SPE-159258-PA. http://dx.doi.org/10.2118/159258-PA.
Peng, D. and Robinson, D.B. 1976. A New Two-Constant Equation of State. Ind. Eng. Chem. Fundamentals 15 (1): 59–64. http://dx.doi.org/10.1021/i160057a011.
Rachford, H.H. and Rice J.D. 1952. Procedure for Use of Electronic Digital Computers in Calculating Flash Vaporization Hydrocarbon Equilibrium. J. Pet Technol 4 (10): 19. SPE-952327-G-PA. http://dx.doi.org/10.2118/952327-G-PA.
Rao, D.N. 1997. A New Technique of Vanishing Interfacial Tension for Miscibility Determination. Fluid Phase Equilibria 139 (1): 311–324. http://dx.doi.org/10.1016/S0378-3812(97)00180-5.
Sapmanee, K. 2011. Effects of Pore Proximity on Behavior and Production Prediction of Gas/Condensate. MS thesis, Mewbourne School of Petroleum and Geological Engineering, University of Oklahoma.
Shapiro, A.A. and Stenby, E.H. 1997. Kelvin Equation for a Non-ideal Multicomponent Mixture. Fluid Phase Equilibria 134 (1): 87–101. http://dx.doi.org/10.1016/S0378-3812(97)00045-9.
Shapiro, A.A. and Stenby, E.H. 2001. Thermodynamics of the Multicomponent Vapor-Liquid Equilibrium Under Capillary Pressure Difference. Fluid Phase Equilibria 178 (1): 17–32. http://dx.doi.org/10.1016/S0378-3812(00)00403-9.
Singh, S.K., Sinha, A., Deo, G. et al. 2009. Vapor-Liquid Phase Coexistence, Critical Properties, and Surface Tension of Confined Alkanes. J. Phys. Chem. 113 (17): 7170–7180. http://dx.doi.org/10.1021/jp8073915.
Stalkup, F.I. 1987. Displacement Behavior of the Condensing/Vaporizing Gas Drive Process. Presented at the SPE Annual Technical Conference and Exhibition, Dallas, Texas, 27–30 September. SPE-16715-MS. http://dx.doi.org/10.2118/16715-MS.
Teklu, T., Alharthy, N., Kazemi, H. et al. 2013. Minimum Miscibility Pressure in Conventional and Unconventional Reservoirs. Presented at Unconventional Resources Technology Conference, Denver, Colorado, 12–14 August. URTeC 1589572/SPE 168865.
Teklu, T., Ghedan, S.G., Graves, R.M. et al. 2012. Minimum Miscibility Pressure Determination: Modified Multiple Mixing Cell Method. Presented at SPE EOR Conference Oil and Gas West Asia, Muscat, Oman, 16–18 April. SPE-155454-MS. http://dx.doi.org/10.2118/155454-MS.
Travallonia, L., Castierb, M., Tavaresa, F.W. et al. 2010. Critical Behavior of Pure Confined Fluids From an Extension of the Van Der Waals Equation of State. J. Supercrit. Fluids 55 (2): 455–461. http://dx.doi.org/10.1016/j.supflu.2010.09.008.
Wang, Y. and Orr, F.M. 1997. Analytical Calculation of Minimum Miscibility Pressure. Fluid Phase Equilibria 139 (1): 101–124. http://dx.doi.org/10.1016/S0378-3812(97)00179-9.
Whitson, C.H. and Michelsen, M.L. 1989. The Negative Flash. Fluid Phase Equilibria 53: 51–71. http://dx.doi.org/10.16/0378-3812(89)80072-X.
Yellig, W.F. and Metcalfe, R.S. 1980. Determination and Prediction of CO2 Minimum Miscibility Pressures. J. Pet Technol 32 (1): 160–168. SPE-7477-PA. http://dx.doi.org/10.2118/7477-PA.
Zarragoicoechea, G.J. and Kuz, V.A. 2004. Critical Shift of a Confined Fluid in a Nanopore. Fluid Phase Equilibria 220 (1): 7–9. http://dx.doi.org/10.1016/j.fluid.2004.02.014.
Zick, A.A. 1986. A Combined Condensing/Vaporizing Mechanism in the Displacement of Oil and Enriched Gases. Presented at SPE Annual Technical Conference and Exhibition, Louisiana, 5–8 October. SPE-15493-MS. http://dx.doi.org/10.2118/15493-MS.
Zuo, Y. and Stenby, E.H. 1998. Prediction of Interfacial Tensions of Reservoir Crude Oil and Gas Condensate Systems. SPE J. 3 (2): 134–145. SPE-38434-PA. http://dx.doi.org/10.2118/38434-PA.