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Optimization of Non-Uniform Perforation Parameters for Multi-Cluster Fracturing

Author

Listed:
  • Qingdong Zeng

    (Department of Mechanics, College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
    Research Center of Multiphase Flow in Porous Media, China University of Petroleum (East China), Qingdao 266580, China)

  • Wenzheng Liu

    (Bohai Oilfield Research Institute, Tianjin Branch, CNOOC China Limited, Tianjin 300459, China)

  • Jun Yao

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

Abstract

Stress shadowing affects the simultaneous propagation of fractures from multiple perforation clusters. Employing uniform perforation parameters for all clusters cause the unbalanced growth of fractures, which arouses the demand of optimizing non-uniform perforation parameters. An optimization workflow combining a fracture propagation model and the particle swarm optimization method (PSO) is proposed for multi-cluster fracturing in this study. The fracture model considers the coupling of rock deformation and fluid flow along the wellbore and fractures, and it is solved by using the Newton iteration method. The optimization is performed by taking the variance of multiple fracture lengths as fitness value function in the frame of the PSO method. Numerical results show that using the same spacings and perforation parameters for all clusters is detrimental to the balanced growth of multiple fractures. The variance of fracture lengths drops greatly through optimization of cluster spacings and perforation number/diameter. Properly increasing the spacing and perforation number/diameter for the middle clusters promotes the balanced growth of multiple fractures. This study provides an efficient optimization workflow for multi-cluster fracturing treatment in horizontal wells.

Suggested Citation

  • Qingdong Zeng & Wenzheng Liu & Jun Yao, 2022. "Optimization of Non-Uniform Perforation Parameters for Multi-Cluster Fracturing," Energies, MDPI, vol. 15(14), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:14:p:5099-:d:861386
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    References listed on IDEAS

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    1. Tianwei Sun & Qingdong Zeng & Huilin Xing, 2021. "A Model for Multiple Hydraulic Fracture Propagation with Thermo-Hydro-Mechanical Coupling Effects," Energies, MDPI, vol. 14(4), pages 1-23, February.
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