高频注采下层状盐穴储氢围岩完整性演化及损伤-愈合竞争机制

Integrity evolution of surrounding rock and damage-healing competition mechanism in bedded salt-cavern hydrogen storage under high-frequency injection-withdrawal

摘要

为分析高频注采对盐穴储氢围岩完整性的影响,建立层状盐穴储氢热-流-固(THM)耦合模型,设置不同循环频率工况,从力学稳定性、动态密封性和长期服役性能3方面评价围岩响应,并引入损伤-愈合竞争表征方法。结果表明:高频循环未改变应力与蠕变高值区位置,盐岩-夹层交界面仍为完整性敏感区;孔隙压力主要沿夹层传播,泄漏响应周期波动,累积泄漏率和体积收缩率随运行时间增加,并随频率升高而增大;年循环次数为20的工况下,疲劳损伤集中于盐岩-夹层交界面,高压阶段愈合增强,低压阶段损伤占优,有效损伤缓慢累积并周期波动;高频盐穴储氢完整性评价应综合考虑低压力学风险、高压渗流风险、长期蠕变收缩及损伤-愈合竞争效应。

Abstract

To investigate the influence of high-frequency injection-withdrawal operation on the integrity of surrounding rock in salt-cavern hydrogen storage, a thermo-hydro-mechanical (THM) coupled model of a bedded salt cavern was established. Operating conditions with different cycling frequencies were simulated. The surrounding-rock responses were evaluated in terms of mechanical stability, dynamic sealing behavior and long-term service performance, and a damage-healing competition characterization method was introduced. The results show that high-frequency cycling does not change the spatial locations of the high-stress and high-creep-strain zones, and the salt rock-interlayer interface remains the integrity-sensitive region. Pore pressure perturbations mainly propagate along the interlayer, and the leakage response exhibits periodic fluctuations. The cumulative leakage ratio and cavern volume shrinkage ratio increase with both operation time and cycling frequency. Under the operating scenario with 20 cycles per year, fatigue damage is concentrated near the salt rock-interlayer interface. Healing is enhanced during high-pressure stages, whereas damage dominates during low-pressure stages, resulting in slowly accumulated and periodically fluctuating effective damage. Therefore, integrity assessment of high-frequency salt-cavern hydrogen storage should comprehensively consider low-pressure mechanical risk, high-pressure seepage risk, long-term creep shrinkage and damage-healing competition effects.

关键词

盐穴储氢 / 高频循环 / 围岩完整性 / 热-流-固耦合 / 损伤-愈合竞争

Key words

salt cavern hydrogen storage / high-frequency cycling / surrounding-rock integrity / thermo-hydro-mechanical coupling / damage-healing competition

参考文献

[1] 杨春和, 王贵宾, 施锡林, 等 . 中国大规模盐穴储氢需求与挑战[J]. 岩土力学, 2024, 45(1): 1-19.

[2] YANG Chunhe, WANG Guibin, SHI Xilin, et al. Demands and challenges of large-scale salt cavern hydrogen storage in China[J]. Rock and Soil Mechanics, 2024, 45(1): 1-19.

[3] BAI W, SHI X, ZHU S, et al. Opportunities and challenges of large-scale salt cavern hydrogen storage in China coupled with renewable energy sources[J]. Clean Energy, 2025, 9(1): 179-196.

[4] HEMATPUR H, ABDOLLAHI R, ROSTAMI S, et al. Review of underground hydrogen storage: concepts and challenges[J]. Advances in Geo-Energy Research, 2023, 7(2): 111-131.

[5] XIE L, YUAN Z, HE B, et al. Experimental and molecular dynamics studies on the multiscale permeability properties of various gases in salt rock[J]. Energy, 2024, 290: 130079.

[6] WANG T, LIAO Y, YANG C, et al. Gas transport model in pore heterogeneous bedded salt rock: implications for tightness evaluation of salt cavern gas storage[J]. Gas Science and Engineering, 2024, 121: 205185.

[7] WANG Z, ZHANG Y, LIU Z, et al. Investigation of the effects of hydrogen injection and withdrawal frequency on stability and tightness of the salt cavern based on a novel coupled thermal-hydro-mechanical model[J]. International Journal of Hydrogen Energy, 2024, 82: 1238-1251.

[8] HÖPKEN L, BEKEBROK H, PLUTA A, et al. Modelling green hydrogen storage in salt caverns: implications of future storage demands on cavern operation[J]. Journal of Energy Storage, 2025, 119: 116150.

[9] 杨福征, 杨昆. 高频循环条件下层状盐穴储氢密闭性分析[J]. 储能科学与技术, 2025, 14(5): 2023-2031.

[10] YANG Fuzheng, YANG Kun. Tightness analysis of hydrogen storage in bedded salt cavern under high-frequency injection and production[J]. Energy Storage Science and Technology, 2025, 14(5): 2023-2031.

[11] LI D, LIU W, FU P, et al. Stability evaluation of salt cavern hydrogen storage and optimization of operating parameters under high frequency injection production[J]. Gas Science and Engineering, 2023, 119: 205119.

[12] CHANG K W, ROSS T S A . Cyclic loading-unloading impacts on geomechanical stability of multiple salt caverns for underground hydrogen storage[J]. International Journal of Hydrogen Energy, 2025, 102: 767-777.

[13] TIAN D, KHALEDI K, JALALI M, et al. Long-term cyclic thermo-mechanical behavior of vertical and horizontal salt caverns for hydrogen storage[J]. Journal of Energy Storage, 2025, 124: 116661.

[14] ZHAO K, LI H, MA H, et al. Creep-fatigue characteristics of rock salt under different loading paths[J]. Journal of Petroleum Science and Engineering, 2022, 218: 111036.

[15] TANG L, FAN J, LI Z, et al. A new constitutive model for salt rock under cyclic loadings based on state variables[J]. Geoenergy Science and Engineering, 2024, 233: 213433.

[16] WANG J, LIU X, ZHANG Q, et al. Fatigue properties and damage constitutive model of salt rock based on CT scanning[J]. International Journal of Mining Science and Technology, 2024, 34(2): 245-259.

[17] HE M, LI N, ZHU C, et al. Experimental investigation and damage modeling of salt rock subjected to fatigue loading[J]. International Journal of Rock Mechanics and Mining Sciences, 2019, 114: 17-23.

[18] CHANG J, QI Y, YANG R, et al. The self-healing property of rock salt damage in underground gas storage: a review[J]. Results in Engineering, 2025, 27: 105098.

[19] ZENG Z, MA H, YANG C, et al. Self-healing behaviors of damaged rock salt under humidity cycling[J]. International Journal of Rock Mechanics and Mining Sciences, 2024, 174: 105636.

[20] LI Z, KANG Y, FAN J, et al. Macroscopic experimental study and microscopic phenomenon analysis of damage self-healing in salt rock[J]. Engineering Geology, 2024, 338: 107634.

[21] LIANG X, MENG T, FENG G, et al. Evolution of permeability and pore structure of salt rock and its self-healing mechanism under coupled thermo-hydro-mechanical environment[J]. Journal of Energy Storage, 2023, 66: 107476.

[22] COARITA-TINTAYA E D, GOLFIER F, GRGIC D, et al. Fully coupled THM modelling of damage and healing interactions in rock salt: application to hydrogen storage in salt caverns[J]. International Journal of Hydrogen Energy, 2025, 125: 374-390.

[23] ZHANG Z, LIU W, GUO Q, et al. Tightness evaluation and countermeasures for hydrogen storage salt cavern contains various lithological interlayers[J]. Journal of Energy Storage, 2022, 50: 104454.

[24] CHEN X, LI Y, SHI Y, et al. Tightness and stability evaluation of salt cavern underground storage with a new fluid-solid coupling seepage model[J]. Journal of Petroleum Science and Engineering, 2021, 202: 108475.

[25] GHAEDI M, GHOLAMI R . Characterization and assessment of hydrogen leakage mechanisms in salt caverns[J]. Scientific Reports, 2025, 15(1): 185.

[26] WANG T, MA H, SHI X, et al. Salt cavern gas storage in an ultra-deep formation in Hubei, China[J]. International Journal of Rock Mechanics and Mining Sciences, 2018, 102: 57-70.

[27] 刘斌超, 鲍蕊, 隋福成. 一种引入材料循环本构的单轴疲劳平均应力模型[J]. 航空学报, 2021, 42(12): 209-223.

[28] LIU Binchao, BAO Rui, SUI Fucheng. A mean-stress model including material cyclic constitutive in uniaxial fatigue[J]. Acta Aeronautica et Astronautica Sinica, 2021, 42(12): 209-223.

[29] DOWLING N E, CALHOUN C A, ARCARI A . Mean stress effects in stress-life fatigue and the Walker equation[J]. Fatigue & Fracture of Engineering Materials & Structures, 2009, 32(3): 163-179.

[30] WU F, CHEN J, ZOU Q . A nonlinear creep damage model for salt rock[J]. International Journal of Damage Mechanics, 2019, 28(5): 758-771.

基金资助

国家科技重大专项(2026ZD1014200)

山东省青年科技人才托举工程资助项目(SDAST2026QTB002)

山东省自然科学基金项目(ZR2025QC601)

中央高校基本科研业务费专项资金资助项目(25CX06005A)