深部咸水层CO<sub>2</sub>封存的热-水-力模型研究

魏子俊; 高科

doi:10.19509/j.cnki.dzkq.tb20240772

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深部咸水层CO₂封存的热-水-力模型研究

更新时间：2026-11-05

- 深部咸水层CO₂封存的热-水-力模型研究
- Bulletin of Geological Science and Technology Vol. 44, Issue 4, Pages: 129-141(2025)
- 作者机构：
  
  1. 哈尔滨工业大学环境学院
  2. 南方科技大学地球与空间科学系
- 作者简介：
- 基金信息：
- DOI：10.19509/j.cnki.dzkq.tb20240772
  CLC： X701
- Online First：26 March 2025，
  
  Published：26 March 2025
- 稿件说明：
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魏子俊, 高科. 深部咸水层CO₂封存的热-水-力模型研究[J]. Bulletin of Geological Science and Technology, 2025, 44(4): 129-141. DOI: 10.19509/j.cnki.dzkq.tb20240772.
DOI：

魏子俊, 高科. 深部咸水层CO₂封存的热-水-力模型研究[J]. Bulletin of Geological Science and Technology, 2025, 44(4): 129-141. DOI: 10.19509/j.cnki.dzkq.tb20240772. DOI：

摘要

碳捕获与储存技术对缓解全球气候危机至关重要，深部咸水层因巨大储存潜力成为首选储存地点。然而，CO

受浮力作用易通过裂缝或断层向地面逃逸。因此，研究CO

注入对天然断层影响以及断层活化对CO

迁移的反馈效应意义重大。构建了完全耦合的两相热-水-力模型，以模拟CO

注入、断层失效与羽流传播间相互作用。研究表明：（1）断层激活后渗透率分布呈显著二分性，且高渗区形成与孔隙压力场时空演化紧密耦合，率先失效区域促进孔压释放并抑制了断层进一步活化，使断层呈局部激活特征。（2）CO

迁移范围与岩体冷却区域不等价，羽流逸散快速而广袤，经2 a注入羽流前缘可达1 500 m；温度场扩散缓慢且集中，经20 a注入冷却区域仅200 m，受限温度场不易诱使断层活化，利于碳封存长期安全。（3）断层构型对封存安全性具有重大影响，以逆断层封闭性能最佳，正断层最劣，走滑断层介于两者之间，逆断层对CO

有效封存量比正断层高出约25%。建立的含损伤行为的两相热-水-力模型鲁棒性良好，能准确刻画断层渐进失效与羽流迁移的复杂交互机制，为碳封存工程长期安全性评估提供了理论与技术支撑。

Abstract

ObjectiveCarbon capture and storage (CCS) is crucial for mitigating global climate change

and deep saline aquifers

with the largest identified storage potential

are considered the preferred storage sites. However

CO2 injection is prone to escape through interconnected fractures or reactivated faults toward the surface due to buoyancy. Therefore

investigating the impact of CO2 injection on faults and the feedback effect of fault reactivation on CO2 leakage is of significant importance. MethodsIn this study

we develop a fully coupled two-phase thermo-hydro-mechanical model to simulate the interactions between CO2 injection

fault failure

and CO2 plume propagation. ResultsThe modeling results reveal that upon fault activation

the permeability distribution exhibits a clear dichotomy. Moreover

the evolution of fault permeability is closely linked to the spatio-temporal changes in the pore pressure field. As the initial failure zone evolves into a high-permeability area

it facilitates the release of pore pressure

thereby suppressing further fault activation and leading to localized fault reactivation. Additionally

the migration range of CO2 plumes is not directly correlated with the cooled region of the rock mass. The plume spreads rapidly and extensively

reaching a front migration distance of up to 1500 m after just two years of continuous injection. In contrast

the temperature field spreads slowly and is more concentrated

with the cooled zone reaching only 200 m after 20 years of injection. This restricted temperature field is less likely to induce fault reactivation

which enhances the long-term safety of carbon sequestration. Finally

fault configuration significantly affects CO2 storage safety. Reverse faults provide the best sealing performance

normal faults the worst

and strike-slip faults lie in between. Specifically

the effective CO2 storage capacity in reverse faults is approximately 25% higher than in normal faults. ConclusionIn conclusion

the developed two-phase thermo-hydro-mechanical model

incorporating damage behavior

demonstrates robust performance and effectively captures the complex interaction between fault progressive failure and CO2 plume migration. This model offers both theoretical and technical support for assessing the long-term safety of carbon sequestration projects.

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深部咸水层CO2封存的热-水-力模型研究

DOI：10.19509/j.cnki.dzkq.tb20240772

摘要

Abstract

关键词

Keywords

references

深部咸水层CO₂封存的热-水-力模型研究