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Study on the Displacement and Gas Storage Characteristics of Flue Gas Gravity Flooding in Fractured Tight Oil Reservoirs

Author

Listed:
  • Aiqing Cao

    (State Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, China
    School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Xirui Zhao

    (State Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, China
    School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Zhaomin Li

    (State Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, China
    School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Zhengxiao Xu

    (State Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, China
    School of Petroleum and Natural Gas Engineering, Changzhou University, Changzhou 213164, China)

  • Xinge Sun

    (PetroChina Xinjiang Oilfield Company, Karamay 834000, China)

  • Mengyuan Zhang

    (State Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, China
    School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Binfei Li

    (State Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, China
    School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Fengxiang Yang

    (PetroChina Xinjiang Oilfield Company, Karamay 834000, China)

Abstract

Flue gas is an industrial waste gas produced by the combustion of fossil fuels. Its application in reservoir development can increase oil recovery factor and achieve underground storage of CO 2 . Flue gas gravity flooding experiments were conducted to clarify the displacement and storage characteristics of flue gas gravity flooding. The results show that the experiment can be divided into three stages based on the output characteristics, and the oil recovery factor curve exhibits a stepwise increase. During the pure oil production stage, the crude oil output is approximately half of the total output. When the experimental pressure is 18 MPa, the oil recovery factor is 11.53%. As the experimental pressure increases, the extraction and viscosity reduction effects of the flue gas are enhanced. Therefore, the oil recovery factor gradually increases and the crude oil in the micropores and small pores is better displaced. The storage rate of flue gas is 8.42% at a pressure of 18 MPa. When the experimental pressure increases to 25 MPa, the storage rate of flue gas reaches 19.70%. The increase in permeability and the extension of displacement time can effectively improve the oil recovery factor. The research results provide a new approach for the resource utilization of flue gas and offer theoretical support for flue gas flooding in tight reservoirs.

Suggested Citation

  • Aiqing Cao & Xirui Zhao & Zhaomin Li & Zhengxiao Xu & Xinge Sun & Mengyuan Zhang & Binfei Li & Fengxiang Yang, 2026. "Study on the Displacement and Gas Storage Characteristics of Flue Gas Gravity Flooding in Fractured Tight Oil Reservoirs," Sustainability, MDPI, vol. 18(2), pages 1-18, January.
    • Handle: RePEc:gam:jsusta:v:18:y:2026:i:2:p:832-:d:1840200
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