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Huff-n-Puff Experimental Studies of CO 2 with Heavy Oil

Author

Listed:
  • Evgeny Shilov

    (Center for Hydrocarbon Recovery, Skolkovo Institute of Science and Technology, Moscow 121205, Russia
    Current address: Skolkovo Innovation Center, Bolshoy Bulvar 30-1, Moscow 121205, Russia.)

  • Alexey Cheremisin

    (Center for Hydrocarbon Recovery, Skolkovo Institute of Science and Technology, Moscow 121205, Russia)

  • Kirill Maksakov

    (Department of Technology Development for High Viscosity and Heavy Oils, LUKOIL-Engineering LCC, Moscow 109028, Russia)

  • Sergey Kharlanov

    (Management Department of Scientific and Technical Projects, RITEK JSC, Moscow 115035, Russia)

Abstract

This work is devoted to CO 2 Huff-n-Puff studies on heavy oil. Oil recovery for heavy oil reservoirs is sufficiently small in comparison with conventional reservoirs, and, due to the physical limitation of oil flow through porous media, a strong need for better understanding of tertiary recovery mechanisms of heavy oil exists. Notwithstanding that the idea of Huff-n-Puff gas injection technology for enhanced oil recovery has existed for dozens of years, there is still no any precise methodology for evaluating the applicability and efficiency of this technology in heavy oil reservoirs. Oil recovery factor is a question of vital importance for heavy oil reservoirs. In this work, we repeated Huff-n-Puff tests more than three times at five distinct pressure points to evaluate the applicability and efficiency of CO 2 Huff-n-Puff injection to the heavy oil reservoirs. Additionally, the most critical factor that affects oil recovery in gas injection operation is the condition of miscibility. Experimental data allowed to distinguish the mixing zone of the light fractions of studied heavy oil samples. The experimental results showed that the pressure increase in the Huff-n-Puff injection process does not affect the oil recovery when the injection pressure stays between miscibility pressure of light components of oil and minimum miscibility pressure. It was detected that permeability decreases after Huff-n-Puff CO 2 tests.

Suggested Citation

  • Evgeny Shilov & Alexey Cheremisin & Kirill Maksakov & Sergey Kharlanov, 2019. "Huff-n-Puff Experimental Studies of CO 2 with Heavy Oil," Energies, MDPI, vol. 12(22), pages 1-15, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:22:p:4308-:d:286128
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    References listed on IDEAS

    as
    1. Edwin A. Chukwudeme & Aly A. Hamouda, 2009. "Enhanced Oil Recovery (EOR) by Miscible CO 2 and Water Flooding of Asphaltenic and Non-Asphaltenic Oils," Energies, MDPI, vol. 2(3), pages 1-24, September.
    2. Zhou, Xiang & Yuan, Qingwang & Rui, Zhenhua & Wang, Hanyi & Feng, Jianwei & Zhang, Liehui & Zeng, Fanhua, 2019. "Feasibility study of CO2 huff 'n' puff process to enhance heavy oil recovery via long core experiments," Applied Energy, Elsevier, vol. 236(C), pages 526-539.
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