Effect of ionic strength in low salinity water injection processes

Keywords: Low salinity, ionic strength, wettability, spontaneous imbibition, contact angle, core flooding


Low salinity water injection has been frequently studied as an enhanced oil recovery process (EOR), mainly due to promising experimental results and because operational needs are not very different from those of the conventional water injection. However, there is no agreement on the mechanisms involved in increasing the displacement of crude oil, except for the effects of wettability changes. Water injection is the oil recovery method mostly used, and considering the characteristics of Colombian oil fields, this study analyses the effect of modifying the ionic composition of the waters involved in the process, starting from the concept of ionic strength (IS) in sandstone type rocks.

The experimental plan for this research includes the evaluation of spontaneous imbibition (SI), contact angles, and displacement efficiencies in Berea core plugs. Interfacial tension and pH measurements were also carried out. The initial scenario consists in formation water (FW), with a total concentration of 9,800 ppm (TDS) (IS ~ 0.17) and a 27 °API crude oil. Magnesium and Calcium brine were also used in a first approach to assess the effect of the divalent ions.

Displacement efficiency tests are performed using IS of 0.17, 0.08, and 0.05, as secondary and tertiary oil recovery and the recovery of oil increases in both scenarios. Spontaneous imbibition curves and contact angle measurements show variations as a function of the ionic strength, validating the displacement efficiencies.

Interfacial tension and pH collected data evidence that fluid/fluid interactions occur due to ionic strength modifications. However, as per the conditions of this research, fluid/fluid mechanisms are not as determining as fluid/rock.


Sheng, J. (2014). Critical review of low-salinity waterflooding. Journal of Petroleum Science and Engineering, 120, 216-224. doi:https://doi.org/10.1016/j.petrol.2014.05.026

Collins, W., Couves, J., Hodges, M., & McBr, E. (2018). Effect of Low Salinity Waterflooding on the Chemistry of the Produced Crude Oil. SPE Improved Oil Recovery Conference held in Tulsa, Oklahoma, USA(SPE-190191-MS). doi:https://doi.org/10.2118/190191-MS

Hugues, D., Larsen, S., & Wright, R. (2010). Review of Low Salinity Water Flooding. Scotland. Senergy, A10DEC015A.

Bartels W.-B., Mahani, H., Berg, S., .Hassanizadeha S.M (2019). Literature review of low salinity water flooding from a length and time scale perspective. Fuel, 236, 338-353. doi:https://doi.org/10.1016/j.fuel.2018.09.018.

Rock, A., Hincapie, R. E., Hoffmann, E., & Ganzer, L. (2018, June 8). Tertiary Low Salinity Waterflooding LSWF in Sandstone Reservoirs: Mechanisms, Synergies, and Potentials in EOR Applications. Society of Petroleum engineers. doi:https://doi.org/10.2118/190807-MS.

Ligthelm, D. J., Gronsveld, J., Hofman, J., Brussee, N., Marcelis, F., & van der Linde, H. (2009, January 1). Novel Waterflooding Strategy By Manipulation Of Injection Brine Composition. Society of Petroleum Engineers. doi: https://doi.org/10.2118/119835-MS.

Vledder, P., Gonzalez, I. E., Carrera Fonseca, J. C., Wells, T., & Ligthelm, D. J. (2010, January 1). Low Salinity Water Flooding: Proof Of Wettability Alteration On A Field Wide Scale. Society of Petroleum Engineers. doi:https://doi.org/10.2118/129564-MS.

Berg, S., Cense, A., Jansen, E., & Bakker, K. (2010). Direct Experimental Evidence of Wettability Modification by Low Salinity. Society of Petrophysicists and Well-Log Analysts, SPWLA-2010-v51n5a3, SPWLA.

Mamonov, A., Kvandal, O., Strand, S., & Puntervold, T. (2019). Adsorption of Polar Organic Components onto Sandstone Rock Minerals and Its Effect on Wettability and Enhanced Oil Recovery Potential by Smart Water. Energy Fuels, 33(7), 5954–5960. doi:https://doi.org/10.1021/acs.energyfuels.9b00101.

Serrano-Saldaña, E., Dominguez-Ortiz, A., & Pérez-Aguilar, H. (2004). Wettability of solid/brine/n-dodecane systems: experimental study of the effects of ionic strength and surfactant concentration. Colloids and Surfaces A: Physicochem. Eng. Aspects, 343-349. doi:https://doi.org/10.1016/j.colsurfa.2004.04.025.

Allan Katende, F. S. (2019). A Critical review of Low Salinity Water Flooding : Mechanism, Laboratory and FIeld Application. Journal of Molecular Liquids. Vol. Pages 627-649. doi:https://doi.org/10.1016/j.molliq.2019.01.037.

Hassan N. Al- Saedi, Ralph E.Floria. (2019). Effect of Divalent cations in low salinity water flooding in a sandstone reservoir. Journal of Molecular Liquids. Vol 283. Pages 417-426. doi:https://doi.org/10.1016/j.molliq.2019.03.112

Bartel W.-B., Mahani H., Berg S., .Hassanizadeh S.M. (2018). Literature review of low salinity water flooding from a length and time scale perspective. FUEL. Vol 236. Pages 338-353. doi:https://doi.org/10.1016/j.fuel.2018.09.018.

Maya, G., Herrera, J., Orrego, J., Rojas, F., Rueda, M., & Manrique, E. (2018). Effect of ionic composition in water: oil interactions in adjusted brine chemistry waterflooding: preliminary results. Revista Fuentes: El Reventón Energético, 73-82. doi:https://doi.org/10.18273/revfue.v16n2-2018005.

Aksulu H., Håmsø D., Strand S., Puntervold T, Austad T. (2012). Evaluation of low Salinity Oil Recovery Effects in Sandstone: Effects of the Temperature and pH Gradient. Energy and Fuels. 26, 6, 3497–3503. doi:https://doi.org/10.1021/ef300162n.

Nasralla, R. A., Alotaibi, M. B., & Nasr-El-Din, H. A. (2011, January 1). Efficiency of Oil Recovery by Low Salinity Water Flooding in Sandstone Reservoirs. Society of Petroleum Engineers. doi:10.2118/144602-MS.

Al-Saedi, H. N., Flori, R. E., Alkhamis, M., & Brady, P. V. (2018, August 16). Coupling Low Salinity Water Flooding and Steam Flooding for Sandstone Reservoirs; Low Salinity-Alternating-Steam Flooding (LSASF). Society of Petroleum Engineers. doi:https://doi.org/10.2118/192168-MS.

McGuire, P. L., Chatham, J. R., Paskvan, F. K., Sommer, D. M., & Carini, F. H. (2005, January 1). Low Salinity Oil Recovery: An Exciting New EOR Opportunity for Alaska's North Slope. Society of Petroleum Engineers. doi:https://doi.org/10.2118/93903-MS.

Alhuraishawy, A. K., Almansour, A., Bai, B., Wei, M., Imqam, A., & Geng, J. (2018, August 16). Laboratory Screening Tests to Further Characterize Low-Salinity Waterflooding in Low-Permeability Sandstone Reservoir. Society of Petroleum Engineers. doi:https://doi.org/10.2118/192159-MS.

RezaeiDoust A., Puntervold T., and Austad Tor. (2011). Chemical Verification of the EOR Mechanism by Using Low Saline/Smart Water in Sandstone. Energy and Fuels. 25, 5, 2151–2162. doi:https://doi.org/10.1021/ef200215y.

Zhang, Y., Xie, X., & Morrow, N. R. (2007, January 1). Waterflood Performance By Injection Of Brine With Different Salinity For Reservoir Cores. Society of Petroleum Engineers. doi:https://doi.org/10.2118/109849-MS.

Didier, M., Chaumont, A., Joubert, T., Bondino, I., & Hamon, G. (2015). Contradictory trends for smart water Injection method: role of PH and salinity From sand/oil/brine adhesion maps. SCA2015-005. Canada: International Symposium of the Society of Core.

Vinogradov, J., Jackson, M., & Chamerois, M. (2018). Zeta potential in sandpacks: effect of temperature, electrolyte pH, ionic strength and divalent cations. Colloids and Surfaces. A, Physicochemical and Engineering Aspects, 553, 259-271. doi:https://doi.org/10.1016/j.colsurfa.2018.05.048.

How to Cite
Maya Toro, G., Cardona Rojas, L., Rueda Pelayo, M. F., & Cortes Correa, F. B. (2020). Effect of ionic strength in low salinity water injection processes. CT&F - Ciencia, Tecnología Y Futuro, 10(2), 17-26. https://doi.org/10.29047/01225383.269


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