Structural and Reservoir Characteristics of Potential Carbon Dioxide Storage Sites in the Northern South Yellow Sea Basin, Offshore Eastern China.

The geological storage of carbon dioxide (CO₂) in offshore saline aquifers stands as a primary option for reducing CO₂ emissions in coastal regions. China's coastal regions, particularly Shandong and Jiangsu provinces, face significant challenges in CO₂ reduction. Therefore, evaluating the feasibility of CO₂ geological storage in the adjacent seas is critical. To assess the suitability of a CO₂ storage site, understanding its structural and reservoir characteristics is essential to mitigate injection and storage risks. In this study, we analyzed the structural characteristics and potential traps of the Yantai Depression in the South Yellow Sea Basin based on seismic data interpretation. We further conducted well logging analysis and post-stack seismic inversion to obtain lithological data, including acoustic impedance and sandstone content percentages from the Cenozoic Funing Formation, Dainan–Sanduo Formation, and Yancheng Formation. Our findings highlight that the Yantai Depression in the South Yellow Sea Basin exhibits diverse structural traps and favorable reservoir–caprock combinations, suggesting promising geological conditions for CO₂ storage. This area emerges as a suitable candidate for implementing CO₂ geological storage initiatives. [ABSTRACT FROM AUTHOR]