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3D Fracture Propagation Simulation and Pressure Decline Analysis Research for I-Shaped Fracture of Coalbed

Author

Listed:
  • Chengwang Wang

    (PetroChina Coalbed Methane Company Limited, Chaoyang, Beijing 100028, China)

  • Zixi Guo

    (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China)

  • Lifeng Zhang

    (PetroChina Xinjiang Oilfield Company Development Company, Karamay 834000, China)

  • Yunwei Kang

    (School of Sciences, Southwest Petroleum University, Chengdu 610500, China)

  • Zhenjiang You

    (Centre for Sustainable Energy and Resources, Edith Cowan University, Joondalup, WA 6027, Australia
    School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
    Centre for Natural Gas, The University of Queensland, Brisbane, QLD 4072, Australia)

  • Shuguang Li

    (PetroChina Coalbed Methane Company Limited, Chaoyang, Beijing 100028, China)

  • Yubin Wang

    (PetroChina Coalbed Methane Company Limited, Chaoyang, Beijing 100028, China)

  • Huaibin Zhen

    (PetroChina Coalbed Methane Company Limited, Chaoyang, Beijing 100028, China)

Abstract

After hydraulic fracturing, some treatments intended for production enhancement fail to yield predetermined effects. The main reason is the insufficient research about the fracture propagation mechanism. There is compelling evidence that I-shaped fracture, two horizontal fractures at the junction of coalbed and cover/bottom layer, and one vertical fracture in the coalbed have formed in part of the coalbed after hydraulic fracturing. Therefore, this paper aims at I-shaped fracture propagation simulation. A novel propagation model is derived on the basis of a three-dimensional (3D) model, and the coupling conditions of vertical fracture and horizontal fractures are established based on the flow rate distribution and the bottom-hole pressure equality, respectively. Moreover, an associated PDA (pressure decline analysis of post-fracturing) model is established. Both models complement with each other and work together to guide fracturing treatment. Finally, a field case is studied to show that the proposed models can effectively investigate and simulate fracture initiation/propagation and pressure decline.

Suggested Citation

  • Chengwang Wang & Zixi Guo & Lifeng Zhang & Yunwei Kang & Zhenjiang You & Shuguang Li & Yubin Wang & Huaibin Zhen, 2022. "3D Fracture Propagation Simulation and Pressure Decline Analysis Research for I-Shaped Fracture of Coalbed," Energies, MDPI, vol. 15(16), pages 1-20, August.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:16:p:5811-:d:884826
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    References listed on IDEAS

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    1. Guo, Zixi & Zhao, Jinzhou & You, Zhenjiang & Li, Yongming & Zhang, Shu & Chen, Yiyu, 2021. "Prediction of coalbed methane production based on deep learning," Energy, Elsevier, vol. 230(C).
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