Determination of operating parameters for W-shaped salt caverns

Xuan Wang, Hongling Ma, Zhen Zeng, Hang Li, Wei Liang, Xiaopeng Liang, Jiangyu Fang and Kai Zhao

Energy, 2025, vol. 322, issue C

Abstract: Salt caverns are internationally recognized as excellent geological bodies for energy storage. In this paper, a geomechanical model of W-shaped salt caverns is established, and volume shrinkage, displacement, vertical stress, plastic zone, and expansion volume are selected as the evaluation criteria of stability. The injection and withdrawal operation simulations of W-shaped salt caverns are carried out at high frequency (HF), medium frequency (MF) and low frequency (LF). In the high-frequency, medium-frequency and low-frequency injection simulations, the volume shrinkage, displacement, plastic zone, and expansion volume decreased with the increase of pressure. The suitable minimum pressure for W-shaped salt caverns was obtained in the range of 17–19 MPa under high frequency. The suitable minimum pressure for W-shaped salt caverns was obtained in the range of 14–22.5 MPa under medium frequency. In the case of low frequency, all these pressure ranges are suitable and a minimum of 22.0 MPa is recommended.

Keywords: Salt cavern; Stability; Energy storage; Frequency (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:322:y:2025:i:c:s0360544225008461

DOI: 10.1016/j.energy.2025.135204

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