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Evaluation Methods of Salt Pillar Stability of Salt Cavern Energy Storage

Author

Listed:
  • Hongling Ma

    (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Xinxing Wei

    (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Xilin Shi

    (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Xiaopeng Liang

    (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Weizheng Bai

    (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Lingzhi Ge

    (PipeChina West East Gas Pipeline Company, Science & Technology Information Central, Shanghai 200122, China)

Abstract

Underground energy storage is essential for the country’s development, and underground salt cavern groups are a productive way to store energy. Safety pillar design is the key to ensuring the safe operation of large salt cavern gas storage groups. Therefore, this paper is based on the salt pillar stability design problem and analyzes three aspects: (1) Three kinds of pillar stability design theories—reliability theory, strain energy theory, and catastrophe theory; (2) Two methods for designing stable pillars—determining pillars through formulas and numerical simulations; (3) The form and influencing factors of salt pillar instability—macro and microform and the main influential factors. From the current research, the major problem is that the design of safety pillars has not been systematic, due to the differences in salt rock in the region, and the engineering of salt pillar design still relies on experience. Finally, the impact of salt pillar width and gas injection and withdrawal on the pillars during the design of the salt cavern is analyzed, and the existing salt pillar theoretical characteristics and development trend are summarized.

Suggested Citation

  • Hongling Ma & Xinxing Wei & Xilin Shi & Xiaopeng Liang & Weizheng Bai & Lingzhi Ge, 2022. "Evaluation Methods of Salt Pillar Stability of Salt Cavern Energy Storage," Energies, MDPI, vol. 15(20), pages 1-24, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:20:p:7570-:d:941653
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    References listed on IDEAS

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    1. Nan Zhang & Wei Liu & Yun Zhang & Pengfei Shan & Xilin Shi, 2020. "Microscopic Pore Structure of Surrounding Rock for Underground Strategic Petroleum Reserve (SPR) Caverns in Bedded Rock Salt," Energies, MDPI, vol. 13(7), pages 1-22, March.
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