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Stability Analysis of a Typical Salt Cavern Gas Storage in the Jintan Area of China

Author

Listed:
  • Jingcui Li

    (CNPC Engineering Technology R&D Company Limited, Beijing 102206, China)

  • Jifang Wan

    (CNPC Engineering Technology R&D Company Limited, Beijing 102206, China)

  • Hangming Liu

    (School of Mechanical Engineering, Yangtze University, Jingzhou 434023, China)

  • Maria Jose Jurado

    (Geosciences Barcelona CSIC, Spanish National Research Council, 08028 Barcelona, Spain)

  • Yuxian He

    (School of Mechanical Engineering, Yangtze University, Jingzhou 434023, China)

  • Guangjie Yuan

    (CNPC Engineering Technology R&D Company Limited, Beijing 102206, China)

  • Yan Xia

    (CNPC Engineering Technology R&D Company Limited, Beijing 102206, China)

Abstract

Using underground space to store natural gas resources is an important means by which to solve emergency peak shaving of natural gas. Rock salt gas storage is widely recognized due to its high-efficiency peak shaving and environmental protection. Damage and stress concentrations inside the cavern injection during withdrawal operations and throughout the storage facility life have always been among the most important safety issues. Therefore, accurate evaluation of the stability of rock salt gas storage during operation is of paramount significance to field management and safety control. In this study, we used the finite element numerical analysis software Flac3D to numerically simulate large displacement deformations of the cavern wall during gas storage—in addition to the distribution of the plastic zone of the rock around the cavern and the surface settlement—under different working conditions. We found that the maximum surface settlement value occurred near the upper part of the cavern. The surface settlement value increased as a function of creep time, but this increase leveled off, that is, a convergence trend was observed. The value was relatively small and, therefore, had little impact on the surface. The application of gas pressure inhibited the growth of the plastic zone, but on the whole, the plastic zone’s range increased proportionally to creep time. For the 20-year creep condition, the deformation value of the cavern’s surrounding rock was large. Combined with the distribution of the plastic zone, we believe that the cavern’s surrounding rock is unstable; thus, corresponding reinforcement measures must be taken.

Suggested Citation

  • Jingcui Li & Jifang Wan & Hangming Liu & Maria Jose Jurado & Yuxian He & Guangjie Yuan & Yan Xia, 2022. "Stability Analysis of a Typical Salt Cavern Gas Storage in the Jintan Area of China," Energies, MDPI, vol. 15(11), pages 1-15, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:11:p:4167-:d:832515
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    References listed on IDEAS

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    Cited by:

    1. Xinbo Zhao & Heng Chen & Jian Lv & Xiaohong He & Yiwei Qin & Keming Sun, 2023. "Triaxial Creep Damage Model for Salt Rock Based on Fractional Derivative," Sustainability, MDPI, vol. 15(13), pages 1-18, June.
    2. Yintong Guo & Qiqi Ying & Duocai Wang & Hong Zhang & Famu Huang & Haitao Guo & Lei Hou & Mingnan Xu & Hejuan Liu & Debin Xia, 2022. "Experimental Study on Shear Characteristics of Structural Plane with Different Fluctuation Characteristics," Energies, MDPI, vol. 15(20), pages 1-17, October.
    3. Jifang Wan & Wendong Ji & Yuxian He & Jingcui Li & Ye Gao, 2023. "Pitting and Strip Corrosion Influence on Casing Strength of Salt Cavern Compressed Air Energy Storage," Energies, MDPI, vol. 16(14), pages 1-14, July.
    4. Shengwei Dong & Taian Fang & Jifang Wan & Xuhui Hu & Jingcui Li & Hangming Liu & Dongyang Li & Shaofeng Qiao, 2022. "Study on the Effect of the Water Injection Rate on the Cavern Leaching Strings of Salt Cavern Gas Storages," Energies, MDPI, vol. 16(1), pages 1-18, December.
    5. Yi Zhang & Kun Zhang & Jun Li & Yang Luo & Li-Na Ran & Lian-Qi Sheng & Er-Dong Yao, 2023. "Study on Secondary Brine Drainage and Sand Control Technology of Salt Cavern Gas Storage," Sustainability, MDPI, vol. 15(10), pages 1-19, May.

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