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Laboratory measurement and interpretation of nonlinear gas flow in shale

Author

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  • Yili Kang

    (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Institute of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China)

  • Mingjun Chen

    (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Institute of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China)

  • Xiangchen Li

    (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Institute of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China)

  • Lijun You

    (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Institute of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China)

  • Bin Yang

    (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Institute of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China)

Abstract

Gas flow mechanisms in shale are urgent to clarify due to the complicated pore structure and low permeability. Core flow experiments were conducted under reservoir net confining stress with samples from the Longmaxi Shale to investigate the characteristics of nonlinear gas flow. Meanwhile, microstructure analyses and gas adsorption experiments are implemented. Experimental results indicate that non-Darcy flow in shale is remarkable and it has a close relationship with pore pressure. It is found that type of gas has a significant influence on permeability measurement and methane is chosen in this work to study the shale gas flow. Gas slippage effect and minimum threshold pressure gradient weaken with the increasing backpressure. It is demonstrated that gas flow regime would be either slip flow or transition flow with certain pore pressure and permeability. Experimental data computations and microstructure analyses confirm that hydraulic radius of flow tubes in shale are mostly less than 100 nm, indicating that there is no micron scale pore or throat which mainly contributes to flow. The results are significant for the study of gas flow in shale, and are beneficial for laboratory investigation of shale permeability.

Suggested Citation

  • Yili Kang & Mingjun Chen & Xiangchen Li & Lijun You & Bin Yang, 2015. "Laboratory measurement and interpretation of nonlinear gas flow in shale," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 26(06), pages 1-19.
    • Handle: RePEc:wsi:ijmpcx:v:26:y:2015:i:06:n:s0129183115500631
    DOI: 10.1142/S0129183115500631
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    Cited by:

    1. Shi, Rui & Liu, Jishan & Wang, Xiaoming & Wei, Mingyao & Elsworth, Derek, 2021. "A critical analysis of shale laboratory permeability evolution data," Energy, Elsevier, vol. 236(C).
    2. Li, Jing & Xie, Yetong & Liu, Huimin & Zhang, Xuecai & Li, Chuanhua & Zhang, Lisong, 2023. "Combining macro and micro experiments to reveal the real-time evolution of permeability of shale," Energy, Elsevier, vol. 262(PB).

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