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A Fractional Step Method to Solve Productivity Model of Horizontal Wells Based on Heterogeneous Structure of Fracture Network

Author

Listed:
  • Shengchun Xiong

    (PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Siyu Liu

    (CNOOC China Limited, Shenzhen Branch, Shenzhen 518054, China)

  • Dingwei Weng

    (PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Rui Shen

    (PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Jiayi Yu

    (PetroChina Research Institute of Exploration and Development, Tuha Oilfield Company, Hami 839000, China)

  • Xuemei Yan

    (PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Ying He

    (PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Shasha Chu

    (PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

Abstract

The existing productivity models of staged fractured horizontal wells in tight oil reservoir are mainly linear flow models based on the idealized dual-medium fracture network structure, which have a certain limitation when applied to the production prediction. Aiming at the difficulty in describing the shape of the complex fractal fracture network, a two-dimensional heterogeneous structure model of the fracture network is proposed in this paper. Considering the deformation characteristics of porous media and the characteristic of non-Darcy fluid flow, a three-zone steady-state productivity model with the combination of radial and linear flow is established. To eliminate strong nonlinear characteristics of the mathematical model, a fractional step method is employed to deduce the production formulas of staged fractured horizontal wells under infinite and finite conductivity fractures. The established productivity model is verified with the actual data of three horizontal wells in different blocks of S oilfield, and the error between the model calculation results and the actual production data is less than 4%. The analysis results of productivity sensitive factors show that production of horizontal wells is primarily influenced by the reservoir physical properties and fracturing parameters. The steady-state productivity model established in this study can be applied to effectively predict the average production of a horizontal well in stable stage of production, and it has theoretical and practical application value for improving the development effect of tight oil reservoir.

Suggested Citation

  • Shengchun Xiong & Siyu Liu & Dingwei Weng & Rui Shen & Jiayi Yu & Xuemei Yan & Ying He & Shasha Chu, 2022. "A Fractional Step Method to Solve Productivity Model of Horizontal Wells Based on Heterogeneous Structure of Fracture Network," Energies, MDPI, vol. 15(11), pages 1-26, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:11:p:3907-:d:823961
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    References listed on IDEAS

    as
    1. Qiang He & Bo He & Fengxia Li & Aiping Shi & Jiang Chen & Lingzhi Xie & Wenxiang Ning, 2021. "Fractal Characterization of Complex Hydraulic Fractures in Oil Shale via Topology," Energies, MDPI, vol. 14(4), pages 1-17, February.
    2. Siyu Liu & Shengchun Xiong & Dingwei Weng & Peng Song & Rou Chen & Ying He & Xuewei Liu & Shasha Chu, 2021. "Study on Deliverability Evaluation of Staged Fractured Horizontal Wells in Tight Oil Reservoirs," Energies, MDPI, vol. 14(18), pages 1-21, September.
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    Cited by:

    1. Yufeng Gong & Shuo Zhai & Yuqiang Zha & Tonghao Xu & Shu Liu & Bo Kang & Bolin Zhang, 2022. "Numerical Simulation of Embedded Discrete-Fracture Seepage in Deep Carbonate Gas Reservoir," Energies, MDPI, vol. 15(19), pages 1-17, October.

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