Extended Fractional-Flow Model of Low-Salinity Waterflooding Accounting for Dispersion and Effective Salinity Range
- Hasan Al-Ibadi (Heriot-Watt University) | Karl D. Stephen (Heriot-Watt University) | Eric J. Mackay (Heriot-Watt University)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- December 2019
- Document Type
- Journal Paper
- 2,874 - 2,888
- 2019.Society of Petroleum Engineers
- effective salinity, effective ion concentration, dispersion, fractional flow, retardation, low-salinity waterflooding
- 10 in the last 30 days
- 215 since 2007
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Low-salinity waterflooding (LSWF) is an emergent technology developed to increase oil recovery. Laboratory-scale testing of this process is common, but modeling at the production scale is less well-reported. Various descriptions of the functional relationship between salinity and relative permeability have been presented in the literature, with respect to the differences in the effective salinity range over which the mechanisms occur. In this paper, we focus on these properties and their impact on fractional flow of LSWF at the reservoir scale. We present numerical observations that characterize flow behavior accounting for dispersion.
We analyzed linear and nonlinear functions relating salinity to relative permeability and various effective salinity ranges using a numerical simulator. We analyzed the effect of numerical and physical dispersion of salinity on the velocity of the waterflood fronts as an expansion of fractional-flow theory, which normally assumes shock-like behavior of water and concentration fronts.
We observed that dispersion of the salinity profile affects the fractional-flow behavior depending on the effective salinity range. The simulator solution is equal to analytical predictions from fractional-flow analysis when the midpoint of the effective salinity range lies between the formation and injected salinities. However, retardation behavior similar to the effect of adsorption occurs when these midpoint concentrations are not coincidental. This alters the velocities of high- and low-salinity water fronts.
We derived an extended form of the fractional-flow analysis to include the impact of salinity dispersion. A new factor quantifies a physical or numerical retardation that occurs. We can now modify the effects that dispersion has on the breakthrough times of high- and low-salinity water fronts during LSWF. This improves predictive ability and also reduces the requirement for full simulation.
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Al-Ibadi, H. H., Stephen, K. D., and Mackay, E. J. 2018. Improved Numerical Stability and Upscaling of Low Salinity Water Flooding. Presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition, Brisbane, Australia, 23–25 October. SPE-192074-MS. https://doi.org/10.2118/192074-MS.
Al-Ibadi, H. H., Stephen, K. D., and Mackay, E. J. 2019a. Insights Into the Fractional Flow of Low Salinity Water Flooding in Light of Solute Dispersion and Effective Salinity Range. J Pet Sci Eng 174: 1236–1248. https://doi.org/10.1016/j.petrol.2018.12.001.
Al-Ibadi, H. H., Stephen, K. D., and Mackay, E. J. 2019b. Novel Observations of Salinity Transport in Low Salinity Waterflooding. SPE J. 24 (3): 1108–1122. SPE-190068-PA. https://doi.org/10.2118/190068-PA.
Al-Ibadi, H., Stephen, K., and Mackay, E. 2019c. Analytical Solution of Chemical Flooding in Heterogeneous Non-Communicating Layers With a Focus on Low Salinity Water Flooding. Presented at the SPE Europec featured at 81st EAGE Annual Conference, London, UK, 3–6 June. SPE-195446-MS. https://doi.org/10.2118/195446-MS.
Al-Ibadi, H., Stephen, K., and Mackay, E. 2019d. Analytical and Numerical Solutions of Chemical Flooding in a Layered Reservoir With a Focus on Low Salinity Water Flooding. Presented at the 20th European Symposium on Improved Oil Recovery, Pau, France, 8–11 April. https://doi.org/10.3997/2214-4609.201900131.
Al-Shalabi, E. W., Sepehrnoori, K., Delshad, M. et al. 2015. A Novel Method to Model Low-Salinity-Water Injection in Carbonate Oil Reservoirs. SPE J. 20 (5): 1154–1166. SPE-169674-PA. https://doi.org/10.2118/169674-PA.
Al-Shalabi, E. W. and Sepehrnoori, K. 2017. Low Salinity and Engineered Water Injection for Sandstone and Carbonate Reservoirs, first edition. Gulf Professional Publishing.
Aladasani, A., Bai, B., Wu, Y. et al. 2015. 3D Simulation of Low Salinity, Polymer, Conventional, Water-Flooding and Combination IOR Methods–Heterogeneous and Varying Wetting Conditions. Presented at the SPE/IATMI Asia Pacific Oil and Gas Conference and Exhibition, Nusa Dua, Bali, Indonesia, 20–22 October. SPE-176315-MS. https://doi.org/10.2118/176315-MS.
Al-Sofi, A. M. and Blunt, M. J. 2013. Control of Numerical Dispersion in Streamline-Based Simulations of Augmented Waterflooding. SPE J. 18 (6): 1102–1111. SPE-129658-PA. https://doi.org/10.2118/129658-PA.
Austad, T. 2008. “Smart Water” for Enhanced Oil Recovery: A Comparison of Mechanism in Carbonates and Sandstones. Norway: University of Stavanger.
Bartels, W. B., Mahani, H., Berg, S. et al. 2019. Literature Review of Low Salinity Waterflooding From a Length and Time Scale Perspective. Fuel 236: 338–353. https://doi.org/10.1016/j.fuel.2018.09.018.
Bao, K., Moyner, O., and Lie, K. 2016. Fully Implicit Simulation of Polymer Flooding With MRST. Presented at the ECMOR XV-15th European Conference on the Mathematics of Oil Recovery, Amsterdam, The Netherlands, 29 August–1 September.
Borazjani, S., Bedrikovetsky, P., and Farajzadeh, R. 2016. Analytical Solutions of Oil Displacement by a Polymer Slug With Varying Salinity. J Pet Sci Eng 140: 28–40. https://doi.org/10.1016/j.petrol.2016.01.001.
Braconnier, B., Flauraud, E., and Nguyen, Q. 2014. Efficient Scheme for Chemical Flooding Simulation. Oil Gas Sci Technol 69 (4): 585–601. https://doi.org/10.2516/ogst/2013189.
Brigham, W. E. 1974. Mixing Equations in Short Laboratory Cores. SPE J. 14 (1): 91–99. SPE-4256-PA. https://doi.org/10.2118/4256-PA.
Brodie, J. and Jerauld, G. 2014. Impact of Salt Diffusion on Low-Salinity Enhanced Oil Recovery. Presented at the SPE Improved Oil Recovery Symposium, Tulsa, Oklahoma, 12–16 April. SPE-169097-MS. https://doi.org/10.2118/169097-MS.
Buckley, S. E. and Leverett, M. C. 1942. Mechanism of Fluid Displacement in Sands. Trans. AIME 146 (1): 107–116. SPE-942107-G. https://doi.org/10.2118/942107-G.
Cissokho, M., Boussour, S., Cordier, P. H. et al. 2010. Low Salinity Oil Recovery on Clayey Sandstone: Experimental Study. Presented at the International Symposium of the Society of Core Analysts, Noordwijk, The Netherlands, 27–30 September. SCA2009-05.
Claridge, E. L. and Bondor, P. L. 1974. A Graphical Method for Calculating Linear Displacement With Mass Transfer and Continuously Changing Nobilities. SPE J. 14 (6): 609–618. SPE-4673-PA. https://doi.org/10.2118/4673-PA.
Dang, C., Nghiem, L., Nguyen, N. et al. 2016. Mechanistic Modeling of Low Salinity Water Flooding. J Pet Sci Eng 146: 191–209. https://doi.org/10.1016/j.petrol.2016.04.024.
Fanchi, J. R. 1983. Multidimensional Numerical Dispersion. SPE J. 23 (1): 143–151. SPE-9018-PA. https://doi.org/10.2118/9018-PA.
Fredriksen, S. B., Rognmo, A. U., and Fernø, M. A. 2016. Pore-Scale Mechanisms During Low Salinity Waterflooding: Water Diffusion and Osmosis for Oil Mobilization. Presented at the SPE Bergen One Day Seminar, Bergen, Norway, 20 April. SPE-180060-MS. https://doi.org/10.2118/180060-MS.
Fjelde, I., Asen, S., Omekeh, A. 2012. Low Salinity Water Flooding Experiments and Interpretation by Simulations. Presented at the SPE Improved Oil Recovery Symposium, Tulsa, Oklahoma, 14–18 April. SPE-154142-MS. https://doi.org/10.2118/154142-MS.
Garmeh, G. and Johns, R. 2010. Upscaling of Miscible Floods in Heterogeneous Reservoirs Considering Reservoir Mixing. SPE Res Eval & Eng 13 (5): 747–763. SPE-124000-PA. https://doi.org/10.2118/124000-PA.
Gelhar, L. and Axness, C. 1983. Three-Dimensional Stochastic Analysis of Macrodispersion in Aquifers. Water Resour Res 19 (1): 161–180. https://doi.org/10.1029/WR019i001p00161.
Ghanbari, S., Mackay, E. J., and Pickup, G. E. 2018. Measurement of Physical Dispersion in Random Correlated Permeability Fields and Its Application for Upscaling. Presented at the 16th European Conference on the Mathematics of Oil Recovery, Barcelona, Spain, 3–6 September.
Gilding, B. H. and Kersner, R. 2012. Travelling Waves in Nonlinear Diffusion-Convection Reaction. Basel: Birkhäuser.
Hamid, S. A. and Muggeridge, A. H. 2018. Analytical Solution of Polymer Slug Injection With Viscous Fingering. Comput Geosci 22 (3): 711–723. https://doi.org/10.1007/s10596-018-9721-0.
Hussain, F., Zeinijahromi, A., Bedrikovetsky, P. et al. 2013. An Experimental Study of Improved Oil Recovery Through Fines-Assisted Waterflooding. J Pet Sci Eng 109: 187–197. https://doi.org/10.1016/j.petrol.2013.08.031.
Jackson, M. D., Vinogradov, J., Hamon, G. et al. 2016. Evidence, Mechanisms and Improved Understanding of Controlled Salinity Waterflooding Part 1: Sandstones. Fuel J 185 (1): 772–793. https://doi.org/10.1016/j.fuel.2016.07.075.
Jadhunandan, P. P. and Morrow, N. R. 1995. Effect of Wettability on Waterflood Recovery for Crude-Oil/Brine/Rock Systems. SPE Res Eval & Eng 10 (1): 40–46. SPE-22597-PA. https://doi.org/10.2118/22597-PA.
Jerauld, G., Lin, C. Y., Webb, K. J. et al. 2008. Modeling Low-Salinity Waterflooding. SPE Res Eval & Eng 11 (6): 24–27. SPE-102239-MS. https://doi.org/10.2118/102239-MS.
Johns, R. T., Fayers, F. J., and Orr, J. 1994. Effect of Gas Enrichment and Dispersion on Nearly Miscible Displacements III Condensing/Vaporizing Drives. SPE J. 1 (2): 147–149. SPE-24938-PA. https://doi.org/10.2118/24938-PA.
Jessen, K., Stenby, E. H., Orr Jr. F. M. et al. 2004. Interplay of Phase Behavior and Numerical Dispersion in Finite-Difference Compositional Simulation. Presented at the SPE/DOE Improved Oil Recovery Symposium, Tulsa, Oklahoma, 13–17 April. SPE-75134-MS. https://doi.org/10.2118/75134-MS.
Lager, A., Webb, K. J., and Black C. J. 2006. Low Salinity Oil Recovery—An Experimental Investigation. Presented at the International Symposium of the Society of Core Analysts, Trondheim, Norway, September. SCA 2006-36.
Khorsandi, S., Qiao, C., and Johns, R.T. 2017. Displacement Efficiency for Low-Salinity Polymer Flooding Including Wettability Alteration. SPE J. 22 (2): 417–430. SPE-179695-MS. https://doi.org/10.2118/179695-MS.
Lake, L.W. 1989. Enhanced Oil Recovery. Englewood Cliffs, New Jersey: Prentice Hall.
Lantz, R. B. 1971. Quantitative Evaluation of Numerical Diffusion (Truncation Error). SPE J. 11 (3): 315–320. SPE-2811-PA. https://doi.org/10.2118/2811-PA.
McGuire, P. L., Chatham, J. R., Paskvan, F. K. et al. 2005. Low Salinity Oil Recovery: An Exciting New EOR Opportunity for Alaska’s North Slope. Presented at the SPE Western Regional Meeting, Irvine, California, 30 March–1 April. SPE-93903-MS. https://doi.org/10.2118/93903-MS.
Mohammad Salehi, M., Omidvar, P., and Naeimi, F. 2016. Salinity of Injection Water and Its Impact on Oil Recovery Absolute Permeability, Residual Oil Saturation, Interfacial Tension and Capillary Pressure. Egypt J Pet 26 (2): 301–312. https://doi.org/10.1016/j.ejpe.2016.05.003.
Nasralla, R. and Nasr-El-Din, H. 2014. Double-Layer Expansion: Is It a Primary Mechanism of Improved Oil Recovery by Low-Salinity Waterflooding? SPE Res Eval & Eng 17 (1): 49–59. SPE-154334-MS. https://doi.org/10.2118/154334-MS.
Patton, J. T., Coats, K. H., and Colegrove, G. T. 1971. Prediction of Polymer Flood Performance. SPE J. 11 (1): 72–84. SPE-2546-PA. https://doi.org/10.2118/2546-PA.
Perkins, T. K. and Johnston, O. C. 1963. A Review of Diffusion and Dispersion in Porous Media. SPE J. 3 (1): 70–84. SPE-480-PA. https://doi.org/10.2118/480-PA.
Pope, G. A. 1980. The Application of Fractional Flow Theory to Enhanced Oil Recovery. SPE J. 20 (3): 191–205. SPE-7660-PA. https://doi.org/10.2118/7660-PA.
Rhee, H. K. and Amundson, N. R. 1974. Shock Layer in Two Solute Chromatography: Effect of Axial Dispersion and Mass Transfer. Chem Eng Sci 29 (10): 2049–2060. https://doi.org/10.1016/0009-2509(74)80219-8.
Rossen, W., Johns, R., and Pope, G. 2003. Development of More-Efficient Gas Flooding Applicable to Shallow Reservoirs. Semi-Annual Report. The University of Texas at Austin.
Schlumberger. 2018. ECLIPSE Technical Description.
Sheng, J. J. 2014. Critical Review of Low-Salinity Waterflooding. J. Pet. Sci. Eng. 120: 216–224. https://doi.org/10.1016/j.petrol.2014.05.026.
Shojaei, M. J., Ghazanfari, M. H., and Masihi, M. 2015. Relative Permeability and Capillary Pressure Curves for Low Salinity Water Flooding in Sandstone Rocks. J Nat Gas Sci Eng 25: 30–38. https://doi.org/10.1016/j.jngse.2015.04.023.
Shotton, M., Stephen, K, and Giddins, M. A. 2016. High-Resolution Studies of Polymer Flooding in Heterogeneous Layered. Presented at the SPE EOR Conference at Oil and Gas West Asia, Muscat, Oman, 21–23 March. SPE-179754-MS. https://doi.org/10.2118/179754-MS.
Sohrabi, M., Mahzari, P., Farzaneh, S. et al. 2016. Novel Insights Into Mechanisms of Oil Recovery by Use of Low-Salinity-Water Injection. SPE J. 22 (2): 407–416. SPE-172778-PA. https://doi.org/10.2118/172778-PA.
Sorbie, K. S. and Mackay, E. J. 2000. Mixing of Injected, Connate, and Aquifer Brines in Waterflooding and Its Relevance to Oilfield Scaling. J Pet Sci Eng 27 (1–2): 85–106. https://doi.org/10.1016/S0920-4105(00)00050-4.
Tang, G. Q. and Morrow, N. R. 1999. Influence of Brine Composition and Fines Migration on Crude Oil/Brine/Rock Interactions and Oil Recovery. J Pet Sci Eng 24 (2–4): 99–111. https://doi.org/10.1016/S0920-4105(99)00034-0.
Tang, G. Q. and Morrow, N. R. 1997. Salinity, Temperature, Oil Composition, and Oil Recovery by Waterflooding. SPE Res Eval & Eng 12 (4): 269–276. SPE-36680-PA. https://doi.org/10.2118/36680-PA.
Thyne, G. and Gamage, P. 2011. Evaluation of the Effect of Low Salinity Waterflooding for 26 Fields in Wyoming. Presented at the SPE Annual Technical Conference and Exhibition, Denver, Colorado, 30 October–2 November. SPE-147410-MS. https://doi.org/10.2118/147410-MS.
Tripathi, I. and Mohanty, K. K. 2008. Instability Due to Wettability Alteration in Displacements Through Porous Media. Chem Eng Sci 63 (21): 5366–5374. https://doi.org/10.1016/j.ces.2008.07.022.
Webb, K. J., Black, C. J. J., and A-Ajeel, H. 2003. Low Salinity Oil Recovery—Log-Inject-Log. Presented at the SPE Middle East Oil Show, Bahrain, 9–12 June. SPE-81460-MS. https://doi.org/10.2118/81460-MS.
Yildiz, H. O. and Morrow, N. R. 1996. Effect of Brine Composition on Recovery of Moutray Crude Oil by Waterflooding. J Pet Sci Eng 14 (3–4): 159–168. https://doi.org/10.1016/0920-4105(95)00041-0.
Zhang, Y. and Morrow, N. R. 2006. Comparison of Secondary and Tertiary Recovery With Change in Injection Brine Composition for Crude Oil/Sandstone Combinations. Presented at the SPE/DOE Symposium on Improved Oil Recovery, Tulsa, Oklahoma, 22–26 April. SPE-99757-MS. https://doi.org/10.2118/99757-MS.
Zhang, Y., Xie, X., and Morrow, N. R. 2007. Waterflood Performance by Injection of Brine With Different Salinity for Reservoir Cores. Presented at the SPE Annual Technical Conference and Exhibition, Anaheim, California, 11–14 November. SPE-109849-MS. https://doi.org/10.2118/109849-MS.