| 湘衡盐矿某采区盐腔压气蓄能可利用潜力数值模拟分析 |
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| 引用本文：次惠岭,段钦霞,李采,郭朝斌,何庆成,阮岳军,何阳.2026.湘衡盐矿某采区盐腔压气蓄能可利用潜力数值模拟分析[J].地球学报,47(3):667-678. |
| DOI：10.3975/cagsb.2026.010421 |
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| 基金项目:本文由地球深部探测与矿产资源勘查国家科技重大专项(编号: 2024ZD1004107)、中国地质科学院基本科研业务费项目“自然资源部碳封存与地质储能工程技术创新中心建设与运行”(编号: JKY202413)和国家自然科学基金项目(编号: U2244215; U2344226)联合资助。 |
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| 中文摘要:面对我国能源转型的迫切需求和能源安全的战略考量, 推动储能技术发展成为一项关键举措。湖南湘衡盐矿是我国特大型盐矿床之一, 岩盐开采后留下的盐腔具有用于构建储能库的潜力。本研究聚焦于此, 构建“地质模型—数值模拟—稳定性评价—经济环境效益”一体化分析框架, 具体包括: 基于地球物理探测获取的湘衡盐矿某采区形态数据, 经等效简化后, 建立腔体结构模型, 并利用FLAC3D进行长时储能数值模拟, 结合多指标性能评价体系, 系统分析了在不同运行压力下联通型双腔压缩空气储能库长期稳定性的演化规律。结果显示: 保持循环注采压力差不变, 一定限度内整体提升循环注采压力, 腔体围岩位移、体积变化率逐渐增加, 塑性区体积维持基本稳定, 而剪胀安全系数处于较低水平的区域逐渐减少, 表明较高的运行压力区间有利于保证盐腔储能库长期蠕变运行的稳定性。基于模拟结果, 建议4.3~5.8 MPa作为该盐腔压缩空气储能的运行压力区间。该盐腔可有效储存标准状态下空气1.57×107 m3, 储能能力为1.46×105 kW·h, 预计可满足36.5 MW/146 MWh储能电站建设需要, 建成投产后每年可创造360~630万元的净经济收益, 同时减少CO2排放1.72~3.01万吨, 兼具经济与环境效益。本研究可为未来中部地区采卤溶腔储能利用可行性评价提供参考与案例。 |
| 中文关键词:盐矿区 压气蓄能 地下储能库 腔体稳定性 数值模拟 |
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| Numerical Study on the Operational Potential for Compressed Air Energy Storage in Salt Caverns in the Xiangheng Salt Mine |
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| Abstract:The advancement of energy storage technologies has become a critical initiative in response to the urgent demands of China’s energy transition and strategic considerations for energy security. The Xiangheng salt mining area in Hunan Province, one of China’s super-large-scale deposits, contains salt caverns (formed after solution mining) that have the potential for energy storage reservoir construction. The focus of this study was on the construction of an integrated analysis framework for “geological model–numerical simulation–stability evaluation–economic and environmental benefits.” Specifically, based on morphological data of the Xiangheng Salt Mine obtained through geophysical exploration, a cavity structure model was established after equivalent simplification. A long-term energy storage numerical simulation was conducted using FLAC3D. In combination with a multi-index performance evaluation system, the evolution law of long-term stability of the connected double-cavity compressed air energy storage reservoir under different operating pressures was systematically analyzed. The results indicate that, while maintaining a constant cyclic injection-withdrawal pressure difference, a moderate overall increase in the cyclic operating pressure leads to a gradual increase in the cavern surrounding rock displacement and volume change rate. However, the plastic zone volume remained largely stable, and the area with a low dilatancy safety factor progressively shrank. This suggests that higher operating pressure is beneficial for ensuring the long-term creep stability of salt cavern energy storage reservoirs. Based on the simulation results, an optimal operational pressure range of 4.3–5.8 MPa is recommended for the CAES system in this salt caverns. The salt caverns can effectively store 1.57×107 m3 of air under standard conditions, equivalent to 1.46×105 kW·h of energy. This capacity is projected to meet the construction requirements for a 36.5 MW/146 MWh energy storage power station. Once operational, the facility is expected to generate an annual net economic profit of 3.6 to 6.3 million RMB while reducing CO2 emissions by 17 200 to 30 100 metric tons, offering both economic and environmental benefits. This study provides a valuable reference and case analysis for assessing the feasibility of using salt caverns for energy storage in Central China. |
| keywords:salt mining area compressed air energy storage underground energy storage cavern cavity stability numerical simulation |
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