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Hybrid Carbonated Engineered Water as EOR Solution for Oil-Wet Carbonate Formation

Author

Listed:
  • Bisweswar Ghosh

    (Department of Petroleum Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates)

  • Alibi Kilybay

    (Department of Petroleum Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates)

  • Nithin Chacko Thomas

    (Department of Petroleum Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates)

  • Mohammed Haroun

    (Department of Petroleum Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates)

  • Md Motiur Rahman

    (Department of Petroleum Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates)

  • Hadi Belhaj

    (Department of Petroleum Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates)

Abstract

Carbonated water has proven advantages over conventional CO 2 injection in terms of arresting free CO 2 mobility, low-pressure injection, lower volume requirement, and higher efficiency. The term “engineered water” is designated to selective ion-spiked injection water with the advantage of the ion-exchange reactions with the rock minerals and releasing trapped oil. This article investigated the synergic effect of dissolved CO 2 and engineered water for oil recovery and understanding inner mechanisms. Recovery efficiencies were evaluated through coreflood studies, which revealed that the hybrid water could recover 6–10% more oil than engineered water and about 3% more than carbonated water. HP-HT pendant-drop studies show the insignificance of IFT reduction. Wettability change from oil wet to near-water wet is attributed as a significant factor. The dissolution of Ca 2+ and Mg 2+ and deposition of SO 4 2− observed in coreflooding may have a significant contribution to oil recovery. Pore enlargement evidenced in NMR-PSD and NMR-ICP results support this claim. The study confirmed that the EWI-CWI hybrid technique could be a promising EOR method, eliminating the requirement for high-pressure injection, the problems of gravity segregation, and the early breakthrough of CO 2 . It can also be an effective EOR solution, providing a significant cost advantage and higher oil recovery in addition to the environmental benefits of CO 2 sequestration.

Suggested Citation

  • Bisweswar Ghosh & Alibi Kilybay & Nithin Chacko Thomas & Mohammed Haroun & Md Motiur Rahman & Hadi Belhaj, 2022. "Hybrid Carbonated Engineered Water as EOR Solution for Oil-Wet Carbonate Formation," Energies, MDPI, vol. 15(21), pages 1-21, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:7889-:d:951904
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    References listed on IDEAS

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    1. Faisal Awad Aljuboori & Jang Hyun Lee & Khaled A. Elraies & Karl D. Stephen, 2019. "Gravity Drainage Mechanism in Naturally Fractured Carbonate Reservoirs; Review and Application," Energies, MDPI, vol. 12(19), pages 1-26, September.
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