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Comprehensive Research on Construction and Stability of Horizontal-Well Cavity Natural Gas Storage in Thinly Bedded Salt Rocks in China

Author

Listed:
  • Dan Lu

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China)

  • Jie Chen

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China)

  • Fei Wu

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China)

  • Deyi Jiang

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China)

  • Wei Liu

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China)

  • Bowen Ding

    (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China)

  • Xinyu Luo

    (College of Mining, Liaoning Technical University, Fuxin 123000, China)

  • Yanfei Kang

    (Technology Innovation Center of Geohazards Automatic Monitoring, Ministry of Natural Resources, Chongqing Institute of Geology and Mineral Resources, Chongqing 401120, China)

  • Yi He

    (School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China)

Abstract

This study aimed to overcome the difficulty of conducting the horizontal-well cavity leaching test in the field and to investigate the long-term stability of the horizontal-well salt-cavity natural gas storage. The simulation test design is combined with the similarity theory to study the cavity expansion characteristics and the influence law of cavity leaching parameters. Through the design of a rubber hose connection, an integrated closed test system for multi-stage horizontal-well cavity leaching and brine drainage was built. The test system also realises the repeatable backward movement of the injection well during the test. A similarity simulation of the test design was carried out, and the test platform was constructed to carry out multi-stage horizontal-well leaching tests with a nitrogen cushion. In the horizontal-well leaching tests with a nitrogen cushion, the influence laws of the well spacing, flow rate and liquid level position on cavity expansion were investigated. Based on the morphological characteristics of the horizontal-well cavity, a numerical model of the horizontal-well salt cavity was developed, which reflects the real cavity morphology leached in the test. The long-term stability of the horizontal-well salt-cavity natural gas storage under different internal pressures was investigated through numerical simulation.

Suggested Citation

  • Dan Lu & Jie Chen & Fei Wu & Deyi Jiang & Wei Liu & Bowen Ding & Xinyu Luo & Yanfei Kang & Yi He, 2023. "Comprehensive Research on Construction and Stability of Horizontal-Well Cavity Natural Gas Storage in Thinly Bedded Salt Rocks in China," Energies, MDPI, vol. 16(23), pages 1-24, December.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:23:p:7877-:d:1292530
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    References listed on IDEAS

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    1. Wang, Tongtao & Yan, Xiangzhen & Yang, Henglin & Yang, Xiujuan & Jiang, Tingting & Zhao, Shuai, 2013. "A new shape design method of salt cavern used as underground gas storage," Applied Energy, Elsevier, vol. 104(C), pages 50-61.
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