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Pressure Performance of Highly Deviated Well in Low Permeability Carbonate Gas Reservoir Using a Composite Model

Author

Listed:
  • Qinwen Zhang

    (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
    CNPC Chuanqing Drilling Engineering Company Limited, Chengdu 610500, China)

  • Liehui Zhang

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

  • Qiguo Liu

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

  • Youshi Jiang

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

Abstract

It is commonly believed that matrix and natural fractures randomly distribute in carbonate gas reservoirs. In order to increase the effective connected area to the storage space as much as possible, highly deviated wells are widely used for development. Although there have been some studies on the composite model for highly deviated wells, they have not considered the effects of stress sensitivity and threshold pressure gradient in a dual-porosity gas reservoir. In this paper, a semi-analytical composite model for low permeability carbonate gas reservoir was established to study the effect of non-Darcy flow. By employing source function, Fourier transform and the perturbation method, the pressure performance and typical well test curves were obtained. Eight flow regimes were identified, and their characteristics were discussed. As a result, it can be concluded that the effects of stress sensitivity and threshold pressure gradient would make pseudo-pressure and derivative curves rise, which is the characteristic of non-Darcy flow to determine whether there is stress sensitivity or threshold pressure gradient.

Suggested Citation

  • Qinwen Zhang & Liehui Zhang & Qiguo Liu & Youshi Jiang, 2020. "Pressure Performance of Highly Deviated Well in Low Permeability Carbonate Gas Reservoir Using a Composite Model," Energies, MDPI, vol. 13(22), pages 1-19, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:22:p:5952-:d:445166
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    References listed on IDEAS

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    1. Yongfei Yang & Zhihui Liu & Zhixue Sun & Senyou An & Wenjie Zhang & Pengfei Liu & Jun Yao & Jingsheng Ma, 2017. "Research on Stress Sensitivity of Fractured Carbonate Reservoirs Based on CT Technology," Energies, MDPI, vol. 10(11), pages 1-15, November.
    2. Kongjie Wang & Lian Wang & Caspar Daniel Adenutsi & Zhiping Li & Sen Yang & Liang Zhang & Lan Wang, 2019. "Analysis of Gas Flow Behavior for Highly Deviated Wells in Naturally Fractured-Vuggy Carbonate Gas Reservoirs," Mathematical Problems in Engineering, Hindawi, vol. 2019, pages 1-13, July.
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    Cited by:

    1. Haoyuan Li & Qi Zhang & Keying Wei & Yuan Zeng & Yushuang Zhu, 2022. "Well Test Analysis of Inclined Wells in the Low-Permeability Composite Gas Reservoir Considering the Non-Darcy Flow," Energies, MDPI, vol. 15(5), pages 1-16, February.
    2. Mao Li & Zhan Qu & Songfeng Ji & Lei Bai & Shasha Yang, 2023. "A New Methodology for Determination of Layered Injection Allocation in Highly Deviated Wells Drilled in Low-Permeability Reservoirs," Energies, MDPI, vol. 16(23), pages 1-24, November.

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