Study on the Influence of Injection-Production Thermal Stress on the Stability of Salt Cavern Compressed Air Energy Storage Reservoirs

JING Wenjun; WU Weiye; MA Hongling; LIU Fahui; LI Bingsen; XU Ronghui; SUN Xiaomeng

doi:10.19799/j.cnki.2095-4239.2026.0130

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Study on the Influence of Injection-Production Thermal Stress on the Stability of Salt Cavern Compressed Air Energy Storage Reservoirs

更新时间：2026-05-07

- Study on the Influence of Injection-Production Thermal Stress on the Stability of Salt Cavern Compressed Air Energy Storage Reservoirs
- Energy Storage Science and Technology Pages: 1-12(2026)
- 作者机构：
  
  1.中国石油大学（华东）储运与建筑工程学院，山东青岛 266580
  2.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，湖北武汉 430071
  3.中国科学院大学，北京 100049
  4.中电建新能源集团股份有限公司山东分公司，山东济南 250000
- 作者简介：
- 基金信息：
- DOI：10.19799/j.cnki.2095-4239.2026.0130
  CLC： TE 822
- Received：03 February 2026，
  
  Revised：2026-04-30，
  
  Online First：06 May 2026，
- 稿件说明：
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井文君, 吴炜晔, 马洪岭, 等. 注采热应力对盐穴压气储能储库稳定性影响研究[J]. 储能科学与技术, XXXX, XX(XX): 1-12.

JING Wenjun, WU Weiye, MA Hongling, et al. Study on the Influence of Injection-Production Thermal Stress on the Stability of Salt Cavern Compressed Air Energy Storage Reservoirs[J]. Energy Storage Science and Technology, XXXX, XX(XX): 1-12.
井文君, 吴炜晔, 马洪岭, 等. 注采热应力对盐穴压气储能储库稳定性影响研究[J]. 储能科学与技术, XXXX, XX(XX): 1-12. DOI： 10.19799/j.cnki.2095-4239.2026.0130.

JING Wenjun, WU Weiye, MA Hongling, et al. Study on the Influence of Injection-Production Thermal Stress on the Stability of Salt Cavern Compressed Air Energy Storage Reservoirs[J]. Energy Storage Science and Technology, XXXX, XX(XX): 1-12. DOI： 10.19799/j.cnki.2095-4239.2026.0130.

摘要

为探究快速循环充放气引发的热应力对盐穴压气储能储库稳定性的影响，以某盐穴压气储能电站项目为支撑，基于COMSOL Multiphysics软件构建数值模型，重点分析了不同注采速率及长期运行下腔内空气温度场的演化规律，以及热应力作用下围岩的温度场、应力场与位移场响应特征。研究结果表明：盐穴腔内温度演化呈现从热累积阶段向热平衡阶段过渡的阶段性特征，注采速率与腔内温差、峰值温度呈正相关，高注采速率会显著加剧热扰动与热应力循环效应；热应力会重构围岩应力状态，使盐岩与夹层界面处应力集中，压应力被显著抵消甚至转为拉应力，显著增大界面拉张破坏风险，且该风险随注采速率提高而上升；热应力与内压应力叠加，进一步加剧围岩变形，四种注采速率下运行30年后围岩最大位移增幅达7.79%~11.36%，且位移增量及增幅均随注采速率提升而增加，最大位移始终集中于腔顶区域。研究成果揭示了注采热应力作用下盐穴压气储能储库的稳定性演化机制，可为储库的注采方案优化、长期安全运行与风险防控提供理论依据与工程参考。

Abstract

To investigate the influence of thermal stress induced by rapid cyclic gas charging and discharging on the stability of compressed air energy storage (CAES) caverns in salt rock

a numerical model was established using COMSOL Multiphysics software based on the a Salt Rock CAES Power Station project in Shandong Province. The study focuses on analyzing the evolution law of the air temperature field inside the cavern under different injection-production rates and long-term operation

as well as the response characteristics of the temperature field

stress field and displacement field of the surrounding rock under the action of thermal stress. The results show that the temperature evolution inside the salt cavern presents a staged characteristic transitioning from a heat accumulation stage to a heat balance stage. The injection-production rate is positively correlated with the temperature difference and peak temperature inside the cavern

and a high injection-production rate significantly intensifies the thermal disturbance and cyclic thermal stress effect. Thermal stress reconstructs the stress state of the surrounding rock

leading to stress concentration at the interface between salt rock and interlayers. The compressive stress is significantly counteracted or even converted into tensile stress

which notably increases the risk of tensile failure at the interface

and this risk rises with the increase of injection-production rate. The superposition of thermal stress and internal pressure stress further aggravates the deformation of the surrounding rock. After 30 years of operation under four injection-production rates

the maximum displacement of the surrounding rock increases by 7.79%–11.36%. Both the displacement increment and growth rate rise with the increase of injection-production rate

and the maximum displacement is always concentrated in the roof area of the cavern. The research findings reveal the stability evolution mechanism of salt rock CAES caverns under the action of injection-production thermal stress

which can provide a theoretical basis and engineering reference for the optimization of injection-production schemes

long-term safe operation and risk prevention and control of salt rock storage caverns.

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references

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