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Pore-Scale Simulation of Particle Flooding for Enhancing Oil Recovery

Author

Listed:
  • Xiangbin Liu

    (Provincial Key Laboratory of Oil and Gas Chemical Technology, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China)

  • Le Wang

    (Mechanical Engineering College, Xi’an Shiyou University, Xi’an 710065, China)

  • Jun Wang

    (Provincial Key Laboratory of Oil and Gas Chemical Technology, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China)

  • Junwei Su

    (School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

Abstract

The particles, water and oil three-phase flow behaviors at the pore scale is significant to clarify the dynamic mechanism in the particle flooding process. In this work, a newly developed direct numerical simulation techniques, i.e., VOF-FDM-DEM method is employed to perform the simulation of several different particle flooding processes after water flooding, which are carried out with a porous structure obtained by CT scanning of a real rock. The study on the distribution of remaining oil and the displacement process of viscoelastic particles shows that the capillary barrier near the location with the abrupt change of pore radius is the main reason for the formation of remaining oil. There is a dynamic threshold in the process of producing remaining oil. Only when the displacement force exceeds this threshold, the remaining oil can be produced. The flow behavior of particle–oil–water under three different flooding modes, i.e., continuous injection, alternate injection and slug injection, is studied. It is found that the particle size and the injection mode have an important influence on the fluid flow. On this basis, the flow behavior, pressure characteristics and recovery efficiency of the three injection modes are compared. It is found that by injecting two kinds of fluids with different resistance increasing ability into the pores, they can enter into different pore channels, resulting in the imbalance of the force on the remaining oil interface and formation of different resistance between the channels, which can realize the rapid recovery of the remaining oil.

Suggested Citation

  • Xiangbin Liu & Le Wang & Jun Wang & Junwei Su, 2021. "Pore-Scale Simulation of Particle Flooding for Enhancing Oil Recovery," Energies, MDPI, vol. 14(8), pages 1-23, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:8:p:2305-:d:539106
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    References listed on IDEAS

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    1. Junwei Su & Le Wang & Zhaolin Gu & Yunwei Zhang & Chungang Chen, 2018. "Advances in Pore-Scale Simulation of Oil Reservoirs," Energies, MDPI, vol. 11(5), pages 1-17, May.
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    Cited by:

    1. Tao Ning & Meng Xi & Bingtao Hu & Le Wang & Chuanqing Huang & Junwei Su, 2021. "Effect of Viscosity Action and Capillarity on Pore-Scale Oil–Water Flowing Behaviors in a Low-Permeability Sandstone Waterflood," Energies, MDPI, vol. 14(24), pages 1-30, December.

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