Iranian Journal of Chemical Engineering (IJChE)
Scientific Journal

Enhancing Water Flooding Efficiency in Carbonate Oil Reservoirs through Controlled Imbibition and Mobility using Hybrid of Smart Water and Polymer Flooding

Articles in Press

Document Type : Regular Article

Authors

Seyed Mojtaba Hosseini-Nasab 1
Faerzeh Mirderivand 2
Reza Zargarian 3

1 Iran University of Science and Technology

2 School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology, Tehran, Iran

3 Department of Petroleum Engineering, Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, Iran

10.22034/ijche.2026.585050.1596
Abstract
To enhance the efficiency of oil recovery, a combination of multiple methods or materials can be utilized. This study aimed to investigate a hybrid method of smart water and polymer to improve water flooding. Moreover, this paper investigates the influence of sulfate on polymer performance for increasing the performance of this method. To this end, we examine mechanisms affecting oil recovery, including changes in viscosity and interfacial tension (IFT). To assess the impact of the injected fluid on oil recovery, a micro-model consisting sand packs prepared from carbonate rock grains was employed as a two-dimensional simulated porous medium. The Response Surface Methodology (RSM) and Central Composite Design (CCD) were used as the most precise methods to design the experiments. The design was based on five levels and three variables including three parameters of polymer concentrations ranging from 1000 to 3000 ppm, ion of smart water concentrations ranging from 12210 to 54180 ppm, and temperatures between 25–75°C. Considering the defined conditions, the effects of the prepared compositions on viscosity, IFT, and oil recovery were evaluated. The highest final oil recovery obtained for the polymer-smart water without NaCl (Sw-NaCl) solution, reported at about 60.32% of oil originally in place (OOIP), while the lowest one was reported about 50.67% of OOIP.

Keywords

Smart water
Polymer
Enhanced Oil Recovery (EOR)
Mobility ratio
Response surface methodology
Interfacial Tension (IFT)
Subjects
[1] Gao, C. H. (2011, December). Advances of polymer flood in heavy oil recovery. In SPE International Heavy Oil Conference and Exhibition (pp. SPE-150384). SPE. https://doi.org/10.2118/150384-MS.
[2] Amirian, E., Dejam, M., & Chen, Z. (2018). Performance forecasting for polymer flooding in heavy oil reservoirs. Fuel, 216, 83-100. https://doi.org/10.1016/j.fuel.2017.11.110.
[3] Pitts, M. J., Campbell, T. A., Surkalo, H., & Wyatt, K. (1995). Polymer flood of the Rapdan pool. SPE Reservoir Engineering, 10(03), 183-186. https://doi.org/10.2118/27820-PA.
[4] Wang, D., Wang, G., Wu, W., Xia, H., & Yin, H. (2007, November). The influence of viscoelasticity on displacement efficiency—from micro-to macroscale. In SPE Annual Technical Conference and Exhibition? (pp. SPE-109016). SPE. https://doi.org/10.2118/109016-MS.
[5] Yin, S. (2020). Evaluation of EOR potential of low salinity polymer in enhancing heavy oil recovery on the Alaska North Slope. Missouri University of Science and Technology.
[6] Ayirala, S., AlSofi, A., AlYousef, Z., Wang, J., Alsaud, M. A., & AlYousef, A. (2022). SmartWater based synergistic technologies for enhanced oil recovery. Fuel, 316, 123264. https://doi.org/10.1016/j.fuel.2022.123264.
[7] Wang, J., Ayirala, S. C., Sofi, A., & Yousef, A. (2024). Synergistic SmartWater based surfactant polymer flooding for enhanced oil recovery in carbonates. Petroleum Science and Technology, 42(6), 659-671. https://doi.org/10.1080/10916466.2022.2131820.
[8] Kakati, A., Kumar, G., & Sangwai, J. S. (2020). Low salinity polymer flooding: effect on polymer rheology, injectivity, retention, and oil recovery efficiency. Energy & Fuels, 34(5), 5715-5732. https://doi.org/10.1021/acs.energyfuels.0c00393.
[9] Darvish Sarvestani, A., Rostami, B., & Mahani, H. (2021). Polymer-enhanced low-salinity brine to control in situ mixing and salt dispersion in low-salinity waterflooding. Energy & Fuels, 35(13), 10540-10550. https://doi.org/10.1021/acs.energyfuels.1c00871.
[10]           Wang, F., Xu, H., Liu, Y., Jiang, Y., & Wu, C. (2023). Experimental study on the enhanced oil recovery mechanism of an ordinary heavy oil field by polymer flooding. ACS omega, 8(15), 14089-14096. https://doi.org/10.1021/acsomega.2c08084.
[11]           Ferry, J. D. (1980). Viscoelastic properties of polymers (Vol. 264). Wiley.
[12]           Knight, B. L. (1973). Reservoir stability of polymer solutions. Journal of Petroleum Technology, 25(05), 618-626. https://doi.org/10.2118/4167-PA.
[13]           Cannella, W. J., Huh, C., & Seright, R. S. (1988, October). Prediction of xanthan rheology in porous media. In SPE Annual Technical Conference and Exhibition? (pp. SPE-18089). SPE. https://doi.org/10.2118/18089-MS.
[14]           Tahir, M., Hincapie, R. E., Foedisch, H., Abdullah, H., & Ganzer, L. (2018, June). Impact of sulphates presence during application of smart water flooding combined with polymer flooding. In SPE Europec featured at EAGE Conference and Exhibition? (p. D042S014R003). SPE. https://doi.org/10.2118/190796-MS.
[15]           Gong, H., Xu, G., Zhu, Y., Wang, Y., Wu, D., Niu, M., ... & Wang, H. (2009). Influencing factors on the properties of complex systems consisting of hydrolyzed polyacrylamide/triton x-100/cetyl trimethylammonium bromide: viscosity and dynamic interfacial tension studies. Energy & fuels, 23(1), 300-305. https://doi.org/10.1021/ef800546t.
[16]           Al-Sahhaf, T., Elkamel, A., Suttar Ahmed, A., & Khan, A. R. (2005). The influence of temperature, pressure, salinity, and surfactant concentration on the interfacial tension of the n-octane-water system. Chemical Engineering Communications, 192(5), 667-684. https://doi.org/10.1080/009864490510644.
[17]           Tahir, M., Hincapie, R. E., Foedisch, H., Strobel, G. J., & Ganzer, L. (2019, October). Potential benefits of fluid optimization for combined smart-water and polymer flooding: Impact on remaining oil saturation. In SPE Russian Petroleum Technology Conference? (p. D023S014R002). SPE. https://doi.org/10.2118/196763-MS.
 
Iranian Journal of Chemical Engineering (IJChE)

Articles in Press, Accepted Manuscript
Available Online from 23 August 2026

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