Partition-Coefficient Relations for Improved Equation-of-State Description of Microemulsion-Phase Behavior
- Victor A. Torrealba (King Abdullah University of Science and Technology) | Russell T. Johns (Pennsylvania State University)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- October 2018
- Document Type
- Journal Paper
- 1,899 - 1,908
- 2018.Society of Petroleum Engineers
- surfactant partitioning, surfactant affinity, surfactant flooding, microemulsion phase behavior, HLD
- 9 in the last 30 days
- 148 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 10.00|
|SPE Non-Member Price:||USD 30.00|
Surfactant-mediated enhanced-oil-recovery (EOR) techniques, such as surfactant/polymer (SP) flooding, have received increased attention because of their ability to reduce capillary forces at the pore-scale to ultralow values and mobilize trapped oil. Recently, there have been increased efforts in microemulsion-phase-behavior modeling capabilities by relying on the hydrophilic/lipophilic-difference (HLD) measure for surfactant-affinity quantification. One common assumption of most microemulsion-phase-behavior models is the assumption of pure excess phases, which states that the surfactant component is only present in the microemulsion phase. This assumption can lead to significant errors for some surfactant systems, especially when applied to chemical simulations in which discontinuities may arise.
The main novelty of this paper is to allow for surfactant partitioning into both the water and oil excess phases by use of a simple approach, and then relate relevant surfactant-partitioning coefficients (i.e., K-values) to HLD. Surfactant screening that is based on surfactant-structure parameters is also considered based on estimated K-values. Key dimensionless groups are identified as a function of activity coefficients, which allow for a simplified description of the surfactant-partition coefficients. These surfactant-partition coefficients are combined with the chemical-potentials (CP) equation-of-state (EoS) model to describe and predict the phase behavior when the excess phases are not pure. Further, the developed surfactant-partitioning model can be used in other microemulsion-phase-behavior models to allow for impure excess phases.
|File Size||754 KB||Number of Pages||10|
Brown, C. L., Pope, G. A., Abriola, L. M. et al. 1994. Simulation of Surfactant-Enhanced Aquifer Remediation. Water Resources Research 30 (11): 2959–2977. https://doi.org/10.1029/94WR01458.
Burauer, S., Sachert, T., Sottmann, T. et al. 1999. On Microemulsion Phase Behavior and the Monomeric Solubility of Surfactant. Physical Chemistry Chemical Physics 1: 4299–4306. https://doi.org/10.1039/A903542G.
Chan, K. S. and Shah, D. O. 1979. The Effect of Surfactant Partitioning on the Phase Behavior and Phase Inversion of the Middle Phase Microemulsions. Presented at the SPE Oilfield and Geothermal Chemistry Symposium, Houston, 22–24 January. SPE-7869-MS. https://doi.org/10.2118/7869-MS.
Fountain, J. C., Starr, R. C., Middleton, T. et al. 1996. A Controlled Field Test of Surfactant-Enhanced Aquifer Remediation. Ground Water 34 (5): 910–916. https://doi.org/10.1111/j.1745-6584.1996.tb02085.x.
Ghosh, S. and Johns, R. T. 2016. An Equation-of-State Model to Predict Surfactant/Oil/Brine-Phase Behavior. SPE J. 21 (4): 1106–1125. SPE-170927-PA. https://doi.org/10.2118/170927-PA.
Graciaa, A., Anderez, J., Bracho, C. et al. 2006. The Selective Partitioning of the Oligomers of Polyethoxylated Surfactant Mixtures Between Interface and Oil and Water Bulk Phases. Advances in Colloid and Interface Science 123: 63–73. https://doi.org/10.1016/j.cis.2006.05.015.
Huh, C. 1979. Interfacial Tensions and Solubilizing Ability of a Microemulsion Phase That Coexists With Oil and Brine. Journal of Colloid and Interface Science 71 (2): 408–426. https://doi.org/10.1016/0021-9797(79)90249-2.
Jin, M. Q., Hirasaki, G. J., Jackson, R. E. et al. 2007. Control of Downward Migration of Dense Nonaqueous Phase Liquid During Surfactant Flooding by Design Simulations. Water Resources Research 43 (1): 14. https://doi.org/10.1029/2006WR004858.
Khorsandi, S. and Johns, R. T. 2016. Robust Flash Calculation Algorithm for Microemulsion Phase Behavior. Journal of Surfactants and Detergents 19 (6): 1273–1287. https://doi.org/10.1007/s11743-016-1877-9.
Khorsandi, S. and Johns, R. T. 2017. Robust Flash Calculation Algorithm for Microemulsion Phase Behavior. International Application No. PCT/2017/048727.
Koukounis, C., Wade, W. H., and Schecter, R. S. 1983. Phase Partitioning of Anionic and Nonionic Surfactant Mixtures. SPE J. 23 (2): 301–310. SPE-8261-PA. https://doi.org/10.2218/8261-PA.
Lake, L. W., Johns, R. T., Rossen, W. R. et al. 2014. Fundamentals of Enhanced Oil Recovery. Richardson, Texas: Society of Petroleum Engineers.
Marquez, N., Bravo, B., Chavez, G. et al. 2012. Partitioning of Fatty Carboxylic Acids and Ethoxylated Nonionic Surfactants in Microemulsion-Oil-Water Systems. Topics in the Colloidal Aggregation and Interfacial Phenomena, ed. Garcia-Sucre M., Loszan A., Castellanos-Suarez A. J., and Toro-Mendoza J.. Kerala, India: Research Signpost.
Roshanfekr, M. and Johns, R. T. 2011. Prediction of Optimum Salinity and Solubilization Ratio for Microemulsion Phase Behavior With Live Crude at Reservoir Pressure. Fluid Phase Equilibria 304 (1–2): 52–60. https://doi.org/10.1016/j.fluid.2011.02.004.
Salager, J. L., Morgan, J. C., Schechter, R. S. et al. 1979. Optimum Formulation of Surfactant-Water-Oil Systems for Minimum Interfacial-Tension or Phase-Behavior. SPE J. 19 (2): 107–115. SPE-7054-PA. https://doi.org/10.2118/7054-PA.
Salager, J. L., Marquez, N., Anton, R. E. et al. 1995. Retrograde Transition in the Phase-Behavior of Surfactant Oil-Water Systems Produced by an Alcohol Scan. Langmuir 11 (1): 37–41. https://doi.org/10.1021/la00001a010.
Salager, J. L., Marquez, N., Graciaa, A. et al. 2000. Partitioning of Ethoxylated Octylphenol Surfactants in Microemulsion-Oil-Water Systems: Influence of Temperature and Relation Between Partitioning Coefficient and Physicochemical Formulation. Langmuir 16 (13): 5534–5539. https://doi.org/10.1021/la9905517.
Salager, J. L., Forgiarini, A. M., and Bullon, J. 2013. How to Attain Ultralow Interfacial Tension and Three-Phase Behavior With Surfactant Formulation for Enhanced Oil Recovery: A Review. Part 1. Optimum Formulation for Simple Surfactant-Oil-Water Ternary Systems. Journal of Surfactants and Detergents 16 (4): 449–472. https://doi.org/10.1007/s11743-013-1470-4.
Sheng, J. 2010. Modern Chemical Enhanced Oil Recovery. Burlington, Massachusetts: Gulf Professional Publishing.
Torrealba, V. A. and Johns, R. T. 2017a. Coupled Interfacial Tension and Phase Behavior Model Based on Micellar Curvatures. Langmuir 33 (47): 13604–13614. https://doi.org/10.1021/acs.langmuir.7b03372.
Torrealba, V. A. and Johns, R. T. 2017b. Microemulsion Phase-Behavior Equation-of-State Model Using Empirical Trends in Chemical Potentials. SPE J. Preprint: SPE-184555-PA. https://doi.org/10.2118/184555-PA.
Wade, W. H., Morgan, J. C., Schechter, R. S. et al. 1978. Interfacial-Tension and Phase Behavior of Surfactant Systems. SPE J. 18 (4): 242–252. SPE-6844-PA. https://doi.org/10.2118/6844-PA.
Winsor, P. A. 1954. Solvent Properties of Amphiphilic Compounds. London: Butterworths Scientific Publishers Ltd.