Numerical investigation of optimum ions concentration in low salinity waterflooding

Hisham Ben Mahmud, Walid Mohamed Mahmud, Shattia Arumugam

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Injecting low saline water is one of the practices used to improve hydrocarbon production that has recently significantly grown due to its advantages over seawater and chemical flooding. Although many theories and mechanisms have been provided on how additional oil recovery has been achieved utilizing low salinity waterflooding, the principle funda- mentals of the mechanism(s) are still ambiguous. This article investigates the potential use of low salinity waterflooding (LSWF) to improve oil production from a sandstone formation. A 3D field-scale model was developed using Computer Modeling Group ( generalized equation-of-state model simulator) based on a mature oil field data. The developed model was validated against actual field data where only 8% deviation was observed. Simulation analysis indicated that multi-component ion exchange is a key factor to improve oil production because it alters rock wettability from oil-wet to water-wet. Simulation sensitivity studies showed that low salinity water flooding provided higher oil production than high water salinity flooding. Moreover, simulation showed early breakthrough time of low salinity water injection can provide high oil recovery up to 71%. Therefore, implementing LSWF instantly after first stage production provides recovery gains up to 75%. The determined optimal injected brine composition concentration for Ca2+, Mg2+ and Na+ are 450, 221, and 60 ppm, respectively. During LSWF, a high divalent cations and low monovalent cations’ concentration can be recommended for injected brine and formation aquifer for beneficial wettability alteration. Simulation also showed that reservoir temperature influenced the alteration of ion exchange wettability during LSWF as oil recovery increased with temperature. Therefore, high temperature sandstone reservoirs can be considered as a good candidate for LSWF.

Cited as: Ben Mahmud, H., Mahmud, W.M., Arumugam, S. Numerical investigation of optimum lons concentration in low salinity waterflooding. Advances in Geo-Energy Research, 2020, 4(3): 271-285, doi: 10.46690/ager.2020.03.05.


Multiphase flow; low-salinity waterflooding; ion exchange; pH increase; enhanced oil recovery; wettability; CMG-GEM simulation; temperature

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Al-adasani, A., Bai, B., Wu, Y. Investigating low salinity waterflooding recovery mechanisms in carbonate reservoirs. Paper SPE 155560 Presented at SPE Improved Oil Recovery Symposium,Tulsa, Oklahoma, USA, 14-18 April, 2012.

Al-adasani, A., Bai, B., Wu, Y., et al. Studying low-salinity waterflooding recovery effects in sandstone reservoirs. J. Pet. Sci. Eng. 2014, 120: 39-51.

Agbalaka, C.C., Dandekar, A.Y., Patil, S.L., et al. Coreflooding studies to evaluate the impact of salinity and wettability on oil recovery efficiency. Transp. Porous Media 2009, 76(1): 77-94.

Aghaeifar, Z., Strand, S., Puntervold, T., et al. Smart water injection strategies for optimized EOR in a high temperature offshore oil reservoir. J. Pet. Sci. Eng. 2018, 165: 743-751.

Austad, T. Water-based EOR in carbonates and sandstones: New chemical understanding of the EOR potential using “smart water”, in Enhanced oil Recovery Field Case Studies, edited by J.S. Jame, Gulf Professional Publishing, Oxford, pp. 301-335, 2013.

Austad, T., Rezaeidoust, A., Puntervold, T. Chemical mechanism of low salinity water flooding in Sandstone reservoirs. Paper SPE 129767 Presented at SPE Improved Oil Recovery Symposium, Tulsa, Oklahoma, USA, 24-28 April, 2010.

Bedrikovetsky, P., Vaz, A.S., Furtado, C.J., et al. Formation-damage evaluation from nonlinear skin growth during doreflooding. SPE Reserv. Eval. Eng. 2011, 14(2): 193-203.

Benneker, A.M., Klomp, J., Lammertink, R.G., et al. Influence of temperature gradients on mono-and divalent ion transport in electrodialysis at limiting currents. Desalination 2018, 443: 62-69.

Chakravarty, K.H., Fosb /0l, P.L., Thomsen, K. Brine crude oil interactions at the Oil-Water Interface. Paper SPE 174685 Presented at SPE Asia Pacific Enhanced Oil Recovery Conference, Kuala Lumpur, Malaysia, 11-13 August, 2015.

Chavez-Miyauch, T.E., Lu, Y., Firoozabadi, A. Low salinity water injection in Berea sandstone: Effect of wettability, interface elasticity, and acid and base functionalities. Fuel 2020, 263: 116572.

Chen, Y., Xie, Q., Pu, W., et al. Drivers of pH increase and implications for low salinity effect in sandstone. Fuel 2018, 218: 112-117.

Da Costa, A.A., Soares, J., Rocha, P., et al. An experimental evaluation of low salinity water mechanisms in a typical Brazilian sandstone and light crude oil with low acid/basic number. Fuel 2020, 273: 117694.

Dang, C., Long, N., Ngoc, N., et al. A comprehensive evaluation of alkaline surfactant polymer flooding and hybrid process for enhanced oil recovery. Paper SPE 187132 Presented at SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA, 9-11 October, 2017.

Dang, C.T., Nghiem, L., Nguyen, N.T., et al. New insights into the critical role of geology in modeling and prediction of low salinity waterflooding. Paper SPE 174294 Presented at EUROPEC, Madrid, Spain, 1-4 June, 2015.

Derakhshanfar, M., Jia, X., Jiang, T., et al. Effects of waterflooding and solvent injection on the solvent vapour extraction (VAPEX) heavy oil recovery. Paper SPE 150691 Presented at SPE Heavy Oil Conference and Exhibition, Kuwait City, Kuwait, 12-14 December, 2011.

Erke, S.I., Volokitin, Y.E., Edelman, I.Y., et al. Low salinity flooding trial at west salym field. Paper SPE 179629 Presented at SPE Improved Oil Recovery Conference, Tulsa, Oklahoma, USA, 11-13 April, 2016.

Esene, C., Onalo, D., Zendehboudi, S., et al. Modeling investigation of low salinity water injection in sandstones and carbonates: Effect of Na+ and SO2− 4 . Fuel 2018, 232: 362-373.

Etemadi, A., Khodapanah, E., Tabatabaei-Nejad, S.A. Mod-elling low-salinity waterflooding: Effect of divalent cations and capillary pressure. J. Pet. Sci. Eng. 2017, 149: 1-8.

Fjelde, I., Asen, S.M., Omekeh, A.V. Low salinity water flooding experiments and interpretation by simulations. Paper SPE 154142 Presented at SPE Improved Oil Recovery Symposium, Tulsa, Oklahoma, USA, 14-18 April, 2012.

Gamage, S., Hasanka, P., Thyne, G.D. Comparison of oil recovery by low salinity waterflooding in secondary and tertiary recovery modes. Paper SPE 147375 Presented at SPE Annual Technical Conference and Exhibition, Denver, Colorado, USA, 30 October-2 November, 2011.

Green, D.W., Willhite, G.P. Enhanced oil recovery, in SPE Textbook Series, 6, edited by L. Henry, Doherty Memo-rial Fund of AIME, Society of Petroleum Engineers, Richardson, TX USA, pp. 143-154, 1998.

Griffiths, D., Gagea, B., Couves, J., et al. The advantages of the application of automated work flows to coreflood testing: Introducing the next generation of BP’s advanced EOR testing capability. Paper SPE 177735 Presented at Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, UAE, 9-12 November, 2015.

Halvorsen, C. Effect of barium and strontium on low salinity waterflooding. Norway, University of Stavanger, 2013.

Hassenkam, T., Mitchell, A.C., Pedersen, C.S., et al. The low salinity effect observed on sandstone model surfaces. Colloids Surf. A Physicochem. Eng. Asp. 2012, 403: 79-86.

Hu, G. A new method for calculating volumetric sweep efficiency in a water-flooding oilfield. Pet. Explor. Dev. 2013, 40 (1): 111-114.

Jadhunandan, P.P., Morrow, N.R. Spontaneous imbibition of water by crude oil/brine/rock systems. In Situ; (United States) 1991,15(4): 5847471.

Jadhunandan, P.P., Morrow, N.R. Effect of wettability on waterflood recovery for crude-oil/brine/rock systems. SPE Reserv. Eng. 1995, 10(1): 40-46.

Jerauld, G.R., Webb, K.J., Lin, C.Y., et al. Modeling low-salinity waterflooding. Paper SPE 102239 Presented at SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA, 24-27 September, 2006.

Kazemi Nia Korrani, A., Sepehrnoori, K., Delshad, M. A novel mechanistic approach for modeling low salinity water injection. Paper SPE 166523 Presented at SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, USA, 30 September-2 October, 2013.

Koleini, M.M., Badizad, M.H., Kargozarfard, Z., et al. The impact of salinity on ionic characteristics of thin brine film wetting carbonate minerals: An atomistic insight. Colloids Surf. A Physicochem. Eng. Asp. 2019, 571: 27-35.

Koleini, M.M., Mehraban, M.F., Ayatollahi, S. Effects of low salinity water on calcite/brine interface: A molecular dynamics simulation study. Colloids Surf. A Physicochem. Eng. Asp. 2018, 537: 61-68.

McGuire, P.L., Chatham, J.R., Paskvan, F.K., et al. Low salinity oil recovery: An exciting new EOR opportunity for Alaska’s north slope. Paper SPE 93903 Presented at SPE Western Regional Meeting, Irvine, California, 30 March-1 April, 2005.

Mugele, F., Siretanu, I., Kumar, N., et al. Insights from ion adsorption and contact-angle alteration at mineral surfaces for low-salinity waterflooding. SPE J. 2018, 21(4): 1204-1213.

Naeem, M.H.T., Dehaghani, A.H.S. Evaluation of the performance of oil as a membrane during low-salinity water injection; focusing on type and concentration of salts. J. Pet. Sci. Eng. 2020, 192: 107228.

Omekeh, A.V., Friis, H.A., Fjelde, I., et al. Modeling of ion-exchange and solubility in low salinity Water Flooding. Paper SPE 154144 Presented at SPE Improved Oil Recovery Symposium, Tulsa, Oklahoma, USA, 14-18 April, 2012.

Patil, S.B., Dandekar, A.Y., Patil, S., et al. Low salinity brine injection for EOR on Alaska North Slope (ANS). Paper IPTC 12004 Presented at The International Technology Conference, Kuala Lumpur, Malaysia, 3-5 December, 2008.

Qiao, C., Johns, R., Li, L. Understanding the chemical mechanisms for low salinity waterflooding. Paper SPE 180138 Presented at SPE Europec Featured at 78th EAGE Conference and Exhibition, Vienna, Austria, 30 May-2 June, 2016.

RezaeiDoust, A., Puntervold, T., Strand, S., et al. Smart water as wettability modifier in carbonate and sandstone: A discussion of similarities/differences in the chemical mechanisms. Energy Fuels 2009, 23: 4479-4485.

Rueslatten, H.G., Hjelmeland, O., Selle, O.M. Wettabil-ityof reservoir rocks and the influence of organo-metalliccompounds. North Sea oil and gas reservoirs conference 1994, 1: 317-324.

Santa, M., Alvarez-J ¨urgenson, G., Busch, S., et al. Sustainable surfactants in enhanced oil recovery. Paper SPE 145039 Presented at SPE Enhanced Oil Recovery Conference, Kuala Lumpur, Malaysia, 19-21 July, 2011.

Shehata, A.M., Nasr-El-Din, H.A. Reservoir connate water chemical composition variations effect on Low-salinity waterflooding. Paper SPE 171690 Presented at Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, UAE, 10-13 November, 2014.

Sheng, J. Critical review of low-salinity waterflooding. J. Pet. Sci. Eng. 2014, 120: 216-224.

Singhal, A.K. Improving water flood performance by varying injection-production rates. Paper PETSOC-2009-126 Presented at Canadian International Petroleum Conference, Calgary, Alberta, Canada, 16-18 June, 2009.

Snosy, M.F., Mahmoud, A., El-Banbi, A., et al. Comprehensive investigation of low-salinity waterflooding in sandstone reservoirs. J. Pet. Explor. Prod. Technol. 2020, 10: 2019-2034.

Soleimani, P., Shadizadeh, S.R., Kharrat, R. Experimental investigation of smart carbonated water injection method in carbonates. Greenhouse Gases: Sci. Technol. 2020, 10: 208-229.

Sorbie, K.S., Collins, I. A proposed pore-scale mechanism for how low salinity waterflooding works. Paper SPE 129833 Presented at SPE Improved Oil Recovery Symposium, Tulsa, Oklahoma, USA, 24-28 April, 2010.

Strand, S., Puntervold, T., Austad, T. Water based EOR from clastic oil reservoirs by wettability alteration: A review of chemical aspects. J. Pet. Sci. Eng. 2016, 146: 1079-1091.

Suijkerbuijk, B., Hofman, J., Ligthelm, D.J., et al. Fundamental investigations into wettability and low salinity flooding by parameter isolation. Paper SPE 154204 Presented at SPE Improved Oil Recovery Symposium, Tulsa, Oklahoma, USA, 14-18 April, 2012.

Tale, F., Kalantariasl, A., Abbasi, S.A.S., et al. Experimental and simulation study of low salinity brine interactions with carbonate rocks. J. Pet. Sci. Eng. 2020, 184: 106497.

Tang, G., Morrow, N.R. Salinity, temperature, oil composition, and oil recovery by waterflooding. SPE Reserv. Eng. 1997, 12(4): 269-276.

Tang, G. Brine composition and waterflood recovery for selected crude oil/brine/rock systems. USA, University of Wyoming, 1998.

Tang, G., Morrow, N.R. Influence of brine composition and fines migration on crude oil/brine/rock interactions and oil recovery. J. Pet. Sci. Eng. 1999, 24(2-4): 99-111.

Thyne, G.D., Gamage, S., Hasanka, P. Evaluation of the effect of low salinity waterflooding for 26 fields in Wyoming. Paper SPE 147410 Presented at SPE Annual Technical Conference and Exhibition, Denver, Colorado, USA, 30 October-2 November, 2011.

Tong, Z., Xie, X., Morrow, N.R. Crude oil composition and the stability of mixed wettability in sandstones. Petrophysics 2003, 44(4): 233-242.

Turgazinov, I.K., Gussenov, I.S., Zhappasbayev, B.Z. The impact of fresh water injection on heavy oil displacement from sandstone reservoirs. ARPN J. Eng. Appl. Sci. 2018, 13(5): 1587-1599.

Vledder, P., Gonzalez, I.E., Carrera Fonseca, J.C., et al. Low salinity water flooding: Proof of wettability alteration on a field wide scale. Paper SPE 129564 Presented at SPE Improved Oil Recovery Symposium, Tulsa, Oklahoma, USA, 24-28 April, 2010.

Wang, J., Song, H., Wang, Y. Investigation on the micro-flow mechanism of enhanced oil recovery by low-salinity water flooding in carbonate reservoir. Fuel 2020, 266: 117156.

Webb, K.J., Black, C.J.J., Al-Ajeel, H. Low salinity oil recovery-log-inject-log. Paper SPE 81460 Presented at Middle East Oil Show, Bahrain, 9-12 June, 2003.

Webb, K.J., Black, C.J.J., Edmonds, I.J. Low salinity oil recovery-The role of reservoir condition corefloods. Paper cp-12-00045 Presented at IOR 2005-13th European Symposium on Improved Oil Recovery, Budapest, Hungary, 25-27 April, 2005a.

Webb, K.J., Black, C.J.J., Tjetland, G. A laboratory study investigating methods for improving oil recovery in carbonates. Paper IPTC 10506 Presented at International Petroleum Technology Conference, Doha, Qatar, 21-23 November, 2005b.

Wu, Y., Bai, B. Efficient simulation for low salinity waterflooding in porous and fractured reservoirs. Paper SPE 118830 Presented at SPE Reservoir Simulation Symposium, The Woodlands, Texas, USA, 2-4 February, 2009.

Xie, Q., Brady, P.V., Pooryousefy, E., et al. The low salinity effect at high temperatures. Fuel 2017, 200: 419-426.

Yildiz, H.O., Morrow, N.R. Effect of brine composition on recovery of Moutray crude oil by waterflooding. J. Pet. Sci. Eng. 1996, 14(3-4): 159-168.

Zaheri, S.H., Khalili, H., Sharifi, M. Experimental investiga-tion of water composition and salinity effect on the oil recovery in carbonate reservoirs. Oil Gas Sci. Technol. 2020, 75: 21.

Zhang, Y., Morrow, N.R. Comparison of secondary and tertiary recovery with change in injection brine composition for crude-oil/sandstone combinations. Paper SPE 99757 Presented at SPE/DOE Symposium on Improved Oil Recovery, Tulsa, Oklahoma, USA, 22-26 April, 2006.

Zhang, Y., Xie, X., Morrow, N.R. Waterflood performance by injection of brine with different salinity for reservoir cores. Paper SPE 109849 Presented at SPE Annual Technical Conference and Exhibition, Anaheim, California, USA, 11-14 November, 2007.



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