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Effect of Salts on Interfacial Tension and CO 2 Mass Transfer in Carbonated Water Injection

Author

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  • Aly A Hamouda

    (Department of Petroleum Technology, University of Stavanger, Stavanger 4035, Norway)

  • Nikhil Bagalkot

    (Department of Petroleum Technology, University of Stavanger, Stavanger 4035, Norway)

Abstract

Carbonated water injection (CWI) is a promising enhanced oil recovery (EOR) and CO 2 sequestration method, which overcomes the problems associated with CO 2 EOR. CO 2 mass transfer and interfacial tension (IFT) are important parameters that influence oil recovery efficiency. This study addresses the impact of MgCl 2 and Na 2 SO 4 in carbonated water (CW) on CW/hydrocarbon IFT and CO 2 mass transfer. An axisymmetric drop shape analysis was used to estimate the IFT and the CO 2 diffusion coefficient. It was found that CW+MgCl 2 reduced both the CW/n-decane IFT (36.5%) and CO 2 mass transfer, while CW+Na 2 SO 4 increased both the IFT and CO 2 mass transfer (57%). It is suggested that reduction in IFT for CW+MgCl 2 brine is mainly due to the higher hydration energy of Mg 2+ . The Mg 2+ ion forms a tight bond to the first hydration shell [Mg(H 2 O) 6 ] 2+ , this increases the effective size at the interface, hence reduce IFT. Meanwhile, the SO 4 2− outer hydration shell has free OH groups, which may locally promote CO 2 mass transfer. The study illustrates the potential of combining salts and CW in enhancing CO 2 mass transfer that can be the base for further investigations. Furthermore, the contribution and proposed mechanisms of the different ions (SO 4 2− and Mg 2+ ) to the physical process in carbonated water/hydrocarbon have been addressed, which forms one of primary bases of EOR.

Suggested Citation

  • Aly A Hamouda & Nikhil Bagalkot, 2019. "Effect of Salts on Interfacial Tension and CO 2 Mass Transfer in Carbonated Water Injection," Energies, MDPI, vol. 12(4), pages 1-17, February.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:4:p:748-:d:208636
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    References listed on IDEAS

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    1. Mandadige Samintha Anne Perera & Ranjith Pathegama Gamage & Tharaka Dilanka Rathnaweera & Ashani Savinda Ranathunga & Andrew Koay & Xavier Choi, 2016. "A Review of CO 2 -Enhanced Oil Recovery with a Simulated Sensitivity Analysis," Energies, MDPI, vol. 9(7), pages 1-22, June.
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    Cited by:

    1. Omid Mosalman Haghighi & Ghasem Zargar & Abbas Khaksar Manshad & Muhammad Ali & Mohammad Ali Takassi & Jagar A. Ali & Alireza Keshavarz, 2020. "Effect of Environment-Friendly Non-Ionic Surfactant on Interfacial Tension Reduction and Wettability Alteration; Implications for Enhanced Oil Recovery," Energies, MDPI, vol. 13(15), pages 1-18, August.
    2. Loay Al Karfry & Riyaz Kharrat & Holger Ott, 2021. "Mechanistic study of the carbonated smart water in carbonate reservoirs," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 11(4), pages 661-681, August.

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