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The Influence of Micro-Fractures on the Flow in Tight Oil Reservoirs Based on Pore-Network Models

Author

Listed:
  • Hai Sun

    (Research Centre of Multiphase Flow in Porous Media, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Lian Duan

    (Research Centre of Multiphase Flow in Porous Media, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Lei Liu

    (Research Centre of Multiphase Flow in Porous Media, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Weipeng Fan

    (Research Centre of Multiphase Flow in Porous Media, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Dongyan Fan

    (Research Centre of Multiphase Flow in Porous Media, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Jun Yao

    (Research Centre of Multiphase Flow in Porous Media, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Lei Zhang

    (Research Centre of Multiphase Flow in Porous Media, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Yongfei Yang

    (Research Centre of Multiphase Flow in Porous Media, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Jianlin Zhao

    (Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland)

Abstract

In this paper, the influence of micro-fractures on the flow of tight reservoirs is studied on the microscopic scale. Three-dimensional digital cores of fractured tight sandstone with varying fracture apertures, lengths, and dip angles are constructed using computed tomography (CT) scans. Pore-network models are built using the three-dimensional digital cores to simulate the flow in tight oil reservoirs. The effects of the micro-fracture aperture, length and dip angle on the pore-throat structure, single-phase flow, and two-phase flow for fracture surfaces with/without roughness are studied. The study demonstrates different influences of micro-fracture characteristics on the flow, and the fracture aperture has the most critical effect. Meanwhile, the roughness of the micro-fracture makes a difference in addition to the three factors of micro-fractures. This paper provides a theoretical basis for the effective development of tight sandstone reservoirs.

Suggested Citation

  • Hai Sun & Lian Duan & Lei Liu & Weipeng Fan & Dongyan Fan & Jun Yao & Lei Zhang & Yongfei Yang & Jianlin Zhao, 2019. "The Influence of Micro-Fractures on the Flow in Tight Oil Reservoirs Based on Pore-Network Models," Energies, MDPI, vol. 12(21), pages 1-17, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:21:p:4104-:d:280883
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    References listed on IDEAS

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    1. Lei Zhang & Wenlong Jing & Yongfei Yang & Hainan Yang & Yaohao Guo & Hai Sun & Jianlin Zhao & Jun Yao, 2019. "The Investigation of Permeability Calculation Using Digital Core Simulation Technology," Energies, MDPI, vol. 12(17), pages 1-9, August.
    2. Silin, Dmitriy & Patzek, Tad, 2006. "Pore space morphology analysis using maximal inscribed spheres," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 371(2), pages 336-360.
    3. Yongfei Yang & Zhihui Liu & Jun Yao & Lei Zhang & Jingsheng Ma & S. Hossein Hejazi & Linda Luquot & Toussaint Dono Ngarta, 2018. "Flow Simulation of Artificially Induced Microfractures Using Digital Rock and Lattice Boltzmann Methods," Energies, MDPI, vol. 11(8), pages 1-17, August.
    4. Yaohao Guo & Lei Zhang & Guangpu Zhu & Jun Yao & Hai Sun & Wenhui Song & Yongfei Yang & Jianlin Zhao, 2019. "A Pore-Scale Investigation of Residual Oil Distributions and Enhanced Oil Recovery Methods," Energies, MDPI, vol. 12(19), pages 1-16, September.
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    Cited by:

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