CO2 seepage & breakthrough process and multifactorial influence mechanisms on it in unsaturated low-permeability sandstones
文献类型：期刊论文
| 作者 | Li, Yi2,3; Wang, Yao3; Dan, Wendong3; Li, Qi2 ; Hu, Zhikai3; Zhao, Jiaqi3; He, Li3; Diao, Yujie1
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| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2025-10-01 |
| 卷号 | 659页码:18 |
| 关键词 | Initial pressure difference Confining pressure CO2 geo-sequestration CO2 breakthrough pressure CO2 phase |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2025.133331 |
| 英文摘要 | CO2 breakthrough pressure is a key indicator for studying CO2 percolation behavior and assessing the sealing capacity of caprocks, which is critical for ensuring the safety and effectiveness of CO2 geo-sequestration. However, existing research on how CO2 phase, initial pressure difference, and confining pressure influence CO2 breakthrough pressure is limited, with inconsistent and unreliable conclusions. To address this gap, this study investigated the mechanisms behind CO2 breakthrough pressure using natural low-permeability unsaturated sandstone as the experimental material. A total of 27 CO2 breakthrough pressure experiments were conducted under various CO2 phases, initial pressure difference, and confining pressures using a step-by-step methodology. The results showed that there was no fixed or predictable relationship between breakthrough pressure and CO2 phase. However, in the presence of a single CO2 phase, the breakthrough pressure declined exponentially as the pressure increases. The influence of pressure on breakthrough pressure was attributed to the combined effect of CO2-H2O interfacial tension (IFT), contact angle of CO2-H2O-rock system, and two-phase viscosity ratio. The study clarifies interactions influencing CO2 breakthrough pressure under varying conditions and elucidates the role of CO2 phase behavior. These findings provide experimental data to improve assessments of CO2 sequestration safety and caprock integrity, enabling more accurate evaluations of geological storage potential. |
| 资助项目 | Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering Safety, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[SKLGME021010] ; National Natural Science Foundation of China[41702251] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001478425900001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35867]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Yi; He, Li |
| 作者单位 | 1.China Geol Survey, Key Lab Carbon Dioxide Geol Storage, Ctr Hydrogeol & Environm Geol Survey, Baoding 071051, Hebei, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn Safety, Wuhan 430071, Peoples R China 3.Tianjin Univ, Sch Civil Engn, Key Lab Coast Civil Struct Safety, Minist Educ, Tianjin 300350, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Yi,Wang, Yao,Dan, Wendong,et al. CO2 seepage & breakthrough process and multifactorial influence mechanisms on it in unsaturated low-permeability sandstones[J]. JOURNAL OF HYDROLOGY,2025,659:18. |
| APA | Li, Yi.,Wang, Yao.,Dan, Wendong.,Li, Qi.,Hu, Zhikai.,...&Diao, Yujie.(2025).CO2 seepage & breakthrough process and multifactorial influence mechanisms on it in unsaturated low-permeability sandstones.JOURNAL OF HYDROLOGY,659,18. |
| MLA | Li, Yi,et al."CO2 seepage & breakthrough process and multifactorial influence mechanisms on it in unsaturated low-permeability sandstones".JOURNAL OF HYDROLOGY 659(2025):18. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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