考虑流-固耦合的山西大宁盐穴二氧化碳地质封存密闭性与稳定性模拟研究

崔晓松; 董留清; 房斌斌; 原文涛; 程丽媛; 王姣霞; 杨美萍; 耿杰

doi:10.19666/j.rlfd.202506118

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考虑流-固耦合的山西大宁盐穴二氧化碳地质封存密闭性与稳定性模拟研究

Thermal Power Generation Vol. 55, Issue 4, Pages: 72-81(2026)

更新时间：2026-06-12

- 考虑流-固耦合的山西大宁盐穴二氧化碳地质封存密闭性与稳定性模拟研究
- 作者机构：
  
  1. 山西省煤炭地质一四八勘查院有限公司
  2. 山西省二氧化碳地质封存技术创新中心
  3. 东北大学资源与土木工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202506118
  CLC： X701;P642
- Published：2026
- 稿件说明：
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[1]崔晓松,董留清,房斌斌,等.考虑流-固耦合的山西大宁盐穴二氧化碳地质封存密闭性与稳定性模拟研究[J].热力发电,2026,55(04):72-81.
[1]崔晓松,董留清,房斌斌,等.考虑流-固耦合的山西大宁盐穴二氧化碳地质封存密闭性与稳定性模拟研究[J].热力发电,2026,55(04):72-81. DOI： 10.19666/j.rlfd.202506118.

DOI：10.19666/j.rlfd.202506118.

摘要

【目的】现代工业生产排放了大量的CO

，为缓解CO

造成的温室效应，利用盐穴对其进行捕获封存。【方法】以山西省大宁县盐岩为潜在储层，基于地质勘察资料建立大宁县盐岩CO

封存试验区地质模型，在流-固耦合条件下，以CO

孔隙压力表示CO

的泄漏范围并作为密封性指标，以腔体顶部竖向位移和竖向应力作为稳定性指标，开展盐穴储气库在不同CO

封存压力、不同矿柱间距工况下的长期密闭性与稳定性研究。【结果】气体封存压力越大，其渗漏范围越大，储气库围岩的竖向位移越大，围岩塑性区范围越小，在封存压力分别为17、23、27、33 MPa下的最终时刻，气体的泄漏范围分别为47、67、73、84 m，腔体顶部的竖向位移分别为–11.5、12.9、28.7、52.2 mm，围岩塑性区范围分别为22、11.8、8、4 m；矿柱间距越大，围岩的竖向位移和垂直应力越小，间距对气体的渗漏范围和塑性区影响不大，在矿柱间距为1.0、1.5、2.0、3.0倍时竖向位移分别为31.7、29.1、28.2、27.3 mm。【结论】气体封存压力增高不利于储气库的密闭性，压力降低则不利于储气库的稳定性；矿柱间距增加有利于储气库的密闭性与稳定性，但影响较小。该研究为山西大宁盐穴封存CO

提供了理论基础。

Abstract

[Objective

]

Modern industrial production emits vast quantities of CO

and to mitigate the greenhouse effect caused by CO

geological sequestration of CO

is imperative. Consequently

the utilization of salt caverns for CO

capture and storage is being considered. [Methods

]

This study uses the salt rock formation in Daning County

Shanxi Province as a potential reservoir. Based on geological survey data

a geological model is established for the Daning County salt rock CO

storage pilot area. Under fluid-solid couplin

g conditions

leakage extent is represented by CO

pore pressure as a sealing indicator

while vertical displacement at the top of the salt cavern reservoir and vertical stress serve as stability indicators. Long-term sealing integrity and stability studies are conducted for the salt cavern reservoir under varying CO

storage pressures and different pillar spacing conditions. [Results

]

As the gas storage pressure increases

the leakage range of the gas expands

the vertical displacement of the reservoir rock increases

and the range of the plastic zone in the rock decreases. At the final state with storage pressures of 17

27 and 33 MPa

the leakage ranges of the gas are 47

73 and 84 m

the vertical displacement at the top of the cavity is –11.5

12.9

28.7 and 52.2 mm

and the range of the rock mass plastic zone is 22

11.8

8 and 4 m

respectively. As the spacing between mine pillars increases

the vertical displacement and vertical stress of the surrounding rock decrease. The spacing has little effect on the gas leakage range and plastic zone. When the spacing between mine pillars is 1.0

1.5

2.0 and 3.0 times the original spacing

the gas leakage range remains between 60 m and 63 m

and the vertical displacement at the cavity top is 31.7

29.1

28.2 and 27.3 mm

respectively. The plastic zone extent within the gas storage reservoir is broadly consistent

ranging between 9 m and 10 m

respectively. [Conclusion

]

Excessively high pressure in a storage reservoir compromises its sealing integrity

while excessively low pressure undermines its stability. A greater spacing between pillars within the reservoir enhances both sealing integrity and stability

but the impact is relatively minor. This study provides a theoretical foundation for CO

storage in the Daning Salt Cavern in Shanxi Province.

关键词

Keywords

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