Journal of Shandong University(Engineering Science) ›› 2026, Vol. 56 ›› Issue (4): 153-162.doi: 10.6040/j.issn.1672-3961.0.2025.157

• Civil Engineering • Previous Articles    

Stress and deformation characteristics of underground high pressure composite lining gas storage

Wang Jingkui1, Zhang Wu2, Wang Zhechao2, Song Qingming1, Li Minghui2   

  1. Wang Jingkui1, Zhang Wu2, Wang Zhechao2, Song Qingming1, Li Minghui2(1. Cnooc Petrochemical Engineering Co., Ltd., Jinan 250001, Shandong, China;
    2. Institute of Deep Engineering and Intelligent Technology, Northeastern University, Shenyang 110004, Liaoning, China
  • Published:2026-08-12

Abstract: Underground lined rock cavern(LRC), distinguished by their superior safety, durability, high efficiency, and eco-friendliness, are gaining global recognition as an optimal solution for natural gas storage. This research focused on analyzing the stress-deformation behavior of the composite lining in an LRC gas reservoir subjected to 15 MPa storage pressure. Numerical simulation techniques were employed to elucidate the stress-displacement distribution patterns among different materials composing the composite lining. The results showed that the steel liner exhibited periodic fluctuations in hoop stress and displacement and was predominantly under tension, with a peak tensile stress of 364 MPa. The displacement of the top dome slightly exceeded that of the vertical shaft and the bottom dome, although the overall displacement of the steel liner was limited. The hoop stresses in the reinforcing bars were relatively low at the domes but reached a maximum of 342.7 MPa in the vertical section. The inner surface of the concrete lining experienced uniform tensile forces, while alternating tension-compression phenomena were observed on the exterior side. The surrounding rock mass underwent circumferential compression, which intensified rapidly from the cavern perimeter outward until reaching the in-situ stress level. Under the 15 MPa internal pressure, significant deformation was observed on the outer surface of the concrete lining, while the surrounding rock experienced slight disturbance, indicating an overall stable gas storage system. The findings could serve as a valuable reference for the design of LRC gas storage facilities.

Key words: LRC gas reservoir, composite lining, rock mechanics parameters, cavern stability, ultra-high internal pressure

CLC Number: 

  • TE822
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