A Numerical Study of Tertiary Oil Recovery by Injection of Low-Salinity Water


  • ahmed radhi wattan Petroleum department, College of Engineering, University of Baghdad, Baghdad, Iraq
  • Mohammed S. aljwad Petroleum department, College of Engineering, University of Baghdad, Baghdad, Iraq
  • Usama S. Alameedy Petroleum department, College of Engineering, University of Baghdad, Baghdad, Iraq




secondary oil recovery, low salinity injection, tertiary oil recovery, recovery factor


The injection of Low Salinity Water (LSWI) as an Enhanced Oil Recovery (EOR) method has recently attracted a lot of attention. Extensive research has been conducted to investigate and identify the positive effects of LSWI on oil recovery.

In order to demonstrate the impact of introducing low salinity water into a reservoir, simulations on the ECLIPSE 100 simulator are being done in this work. To simulate an actual reservoir, an easy static model was made. In order to replicate the effects of injecting low salinity water and normal salinity, or seawater, the reservoir is three-phase with oil, gas, and water. It has one injector and one producer.

Five cases were suggested to investigate the effect of low salinity water injection with different concentrations and the period of injection.

The low salinity injection period varied from twenty-five years in case one and reduced five years in each case until reached to five years in final case.

Higher oil recovery factor obtained in case one with injection time twenty-five years and lower recovery factor for case five with injection time of low salinity water injection five years.

Lower water concentration gives higher oil recovery for all cases where this study investigated the effect of low-salinity water flooding as slug injection.

From the five cases presented, field oil recovery factor (FOE), field oil production rate (FOPR), field oil production total (FOPT), field pressure (FP), and field water cut (FWCT) were observed. Oil recovery is 56.6 percent in high salinity water flooding (HSWF), and 71.8 percent in low salinity water flooding (LSWF) for 0 percent salt concentration and 62.40 percent for 20 percent salt concentration as in case one.


A., “Energy Supply and Demand”, Retrieved from Chevron: http://www.chevron.com/ global issues/energy supply demand, May 2014.

A. “Enhanced Oil Recovery”, Rijswijk: Shell Global Solutions B. V., 2012.

A. Lager; K. J. Webb; I. R. Collins; and D. M. Richmond, “LoSal Enhanced Oil Recovery: Evidence of Enhanced Oil Recovery at the Reservoir Scale”, SPE 113976-MS, 2008. https://doi.org/10.2118/113976-MS

George G. Bernard, “Effect of Floodwater Salinity on Recovery of Oil from Cores Containing Clays”, SPE-1725-MS, 1967. https://doi.org/10.2118/1725-MS

P. P. Jadhunandan, N. R. Morrow, “Effect of Wettability on Waterflood Recovery for Crude- Oil/Brine/ Rock Systems”, Reservoir Engineering 10 (01), pp.40–46, 1995. https://doi.org/10.2118/22597-PA

H. O. Yildiz, N. R. Morrow, “Effect of Brine Composition on Recovery of Moutray Crude Oil by Waterflooding”, Journal of Petroleum Science and Engineering, vol. 14, no. 3–4, pp. 159-168, May 1996. https://doi.org/10.1016/0920-4105(95)00041-0

G.-Q. Tang & N. R. Morrow, (1999). “Influence of brine composition and fines migration on crude oil/hrine/rock interactions and oil recovery”, Journal of Petroleum Science and Engineering, Vol. 24, no. 2–4, pp. 99-111, December 1999. https://doi.org/10.1016/S0920-4105(99)00034-0

S. Berg, A.W. Cense, E. Jansen, and K. Bakker, “Direct Experimental Evidence of Wettability Modification by Low Salinity”, Petrophysics 51 (05), 2010.

F. Hussain, A. Zeinijahromi, P. Bedrikovetsky, A. Badalyan, T. Carageorgos, and Y. Cinar, “An experimental study of improved oil recovery through fines-assisted waterflooding”, Journal of Petroleum Science and Engineering, vol. 109, pp. 187–197, 2013.

Li, Y., “Oil Recovery by Low Salinity Water Injection into a Reservoir: A New Study of Tertiary Oil Recovery Mechanism”, Transport in Porous Media 90, pp. 333–362, 2011. https://doi.org/10.1007/s11242-011-9788-8

Pu, H., Xie, X., Yin, P., and N. R. Morrow, "Low Salinity Waterflooding and Mineral Dissolution.", Paper presented at the SPE Annual Technical Conference and Exhibition, Florence, Italy, September 2010. https://doi.org/10.2118/134042-MS

A. Lager, K. J. Webb, C. J. J. Black, M. Singleton, and K. S. Sorbie, “Low Salinity Oil Recovery: An Experimental Investigation”, Norway, 2006.

K. Webb, A. Lager, & C. Black, “Comparison of High/Low Salinity Watewoil Relative Permeability”, SCA2008-39, 12, Abu Dhabi, UAE 29 October-2 November, 2008. .

S. Y. Lee; K. J. Webb; I. R. Collins; A. Lager; S. M. Clarke; M. O'Sullivan; A. F. Routh; and X. Wang, “Low Salinity Oil Recovery-Increasing Understanding of the Underlying Mechanisms”, SPE, USA, April 2010. https://doi.org/10.2118/129722-MS

I. Fjelde, A. V. Omekeh, and Y. A. Sokama-Neuyam, “Low Salinity Water Flooding: Effect of Crude Oil Composition,” in SPE Improved Oil Recovery Symposium, Tulsa, Oklahoma, USA, 2014. https://doi.org/10.2118/169090-MS

Jamiu O. Adegbite, Emad W. Al-Shalabi, and Bisweswar Ghosh, "Modeling the Effect of Engineered Water Injection on Oil Recovery from Carbonate Cores.", Paper presented at the SPE International Conference on Oilfield Chemistry, Montgomery, Texas, USA, April 2017. doi: https://doi.org/10.2118/184505-MS

John C. Martin, "The Effects of Clay on the Displacement of Heavy Oil by Water." Paper presented at the Venezuelan Annual Meeting, Caracas, Venezuela, October 1959. doi: https://doi.org/10.2118/1411-G

C. T. Q. Dang, L. Nghiem, N. T. B. Nguyen, and Z. Chen, "New Insights into the Critical Role of Geology in Modeling and Prediction of Low Salinity Waterflooding", Paper presented at the EUROPEC 2015, Madrid, Spain, June 2015. doi: https://doi.org/10.2118/174294-MS

M.. Derakhshanfar, X.. Jia, T.. Jiang, F.. Zeng, and Y.. Gu, “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. doi: https://doi.org/10.2118/150691-MS

D. Griffiths, B. Gagea, J. Couves, and M. Spearing, “The advantages of the application of automated workflows to core flood 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. doi: https://doi.org/10.2118/177735-MS

M. M. Koleini, M. H. Badizad, and Z. Kargozarfard, “The impact of salinity on ionic characteristics of thin brine film wetting carbonate minerals: An atomistic insight”, Colloids Surf. A Physicochem. Eng. Asp. 571, pp.27-35, 2019. https://doi.org/10.1016/j.colsurfa.2019.03.070




How to Cite

wattan, ahmed radhi; aljwad, M. S.; Alameedy, U. S. A Numerical Study of Tertiary Oil Recovery by Injection of Low-Salinity Water. Journal of Petroleum Research and Studies 2023, 13, 32-55.