@article{Wu2026, 
author = {Shiguo Wu and Yuan Chen and Xueqing Zhou and Qiang Chen and Linqi Zhu and Lizhong Wang},
title = {Suitability evaluation of CO2 sequestration in saline aquifers: Insights from regional basin studies},
year = {2026},
journal = {Advances in Geo-Energy Research},
volume = {20},
number = {1},
pages = {43-55},
keywords = {CO2 sequestration, saline aquifers, sequestration site selection, mechanical responses},
url = {https://www.sciopen.com/article/10.46690/ager.2026.04.04},
doi = {10.46690/ager.2026.04.04},
abstract = {The growing severity of global climate change has highlighted the importance of CO2 sequestration as a key strategy for reducing CO2 emissions and mitigating global warming. To this end, sedimentary basins worldwide contain extensive yet underexplored saline aquifers with substantial sequestration potential for long-term CO2 sequestration. In this study, the suitability and mechanical responses of CO2 sequestration in a representative half-graben saline aquifer were systematically unraveled through integrated theoretical analysis and multi-physics-coupled numerical simulations. Key factors, such as temperature, pressure, reservoir properties, and caprock distribution, were evaluated based on well logging and mud logging data. Taking the evaluation results as a basis, optimal reservoir-caprock combinations were identified and classified into three types according to their spatial distribution: Single caprock-reservoir, lower interlayer-caprock-reservoir, and upper interlayer-caprock-reservoir. To simulate the mechanical responses during CO2 injection and sequestration, corresponding conceptual models were developed. The results indicate that Type Ⅲ reservoir-caprock combinations, featuring upper mudstone interlayers, exhibit the lowest caprock stress, reduced leakage risk and enhanced sequestration security, which should be prioritized in sequestration site selection. Our findings provide valuable insights for selecting safe and effective CO2 sequestration sites in saline aquifers across regional sedimentary basins.}
}