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Study on Deliverability Evaluation of Staged Fractured Horizontal Wells in Tight Oil Reservoirs

Author

Listed:
  • Siyu Liu

    (University of Chinese Academy of Sciences, Beijing 100049, China
    Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
    PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Shengchun Xiong

    (University of Chinese Academy of Sciences, Beijing 100049, China
    Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
    PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Dingwei Weng

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

  • Peng Song

    (Exploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi’an 710018, China)

  • Rou Chen

    (College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou 310018, China)

  • Ying He

    (Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
    PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Xuewei Liu

    (Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
    PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

  • Shasha Chu

    (Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China
    PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China)

Abstract

At present, the existing deliverability evaluation models mainly consider the impact of specific factors on production, and the description of the complex fracture network structure primarily remains at the stage of an ideal dual-pore medium with uniform distribution. However, this cannot reflect the actual fracture network structure and fluid flow law of fractured horizontal wells. Thus, in this paper, a non-uniform fracture network structure is proposed considering the influence of the threshold pressure gradient and stress sensitivity characteristics on the production performance of horizontal wells. The stress sensitivity and the fractal theory are combined to characterize the permeability of the complex fracture network, and a three-zone compound unsteady deliverability model for staged fractured horizontal wells in tight oil reservoirs is successfully developed. Laplace transformation, perturbation theory, and numerical inversion are applied to obtain the semi-analytical solution of the proposed deliverability model. The reliability and accuracy of the analytical solution are verified by the classical tri-linear flow model and an oil field example. The effects of related influential parameters on the production of horizontal wells are analyzed. The deliverability evaluation method proposed in this paper can provide a theoretical basis for formulating rational development technology policies for tight oil reservoirs.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:18:p:5857-:d:636614
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    Cited by:

    1. 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.

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