东海陆架盆地二氧化碳地质封存储盖组合优选及评估  

Reservoir-cap combination optimization and assessment of CO_(2)geological storage in East China Sea shelf basin

作　　者：吴凯伦 杨鹏程[1] 朱睿哲 王修平 杨佳毅 WU Kailun;YANG Pengcheng;ZHU Ruizhe;WANG Xiuping;YANG Jiayi(Institute of Exploration and Development,SINOPEC Shanghai Offshore Oil&Gas Company,Shanghai 200120,China)

机构地区：[1]中国石油化工股份有限公司上海海洋油气分公司,上海200120

出　　处：《海洋地质前沿》2025年第3期14-24,共11页Marine Geology Frontiers

基　　金：中国石油化工股份有限公司科技项目“东海西湖凹陷CO_(2)地质封存技术研究”(P22175)。

摘　　要：东海陆架盆地是中国最大的近海沉积盆地,具有封存潜力大、近碳源、勘探程度高等特点,是CO_(2)地质封存的极佳场所。本文对东海陆架盆地构造、沉积等基础地质条件进行分析,结合钻井、地震资料建立储、盖层的评价标准,优选储盖组合,圈定有利区。结果表明,瓯江凹陷古新统、西湖凹陷渐新统和中新统具备CO_(2)封存的有利地质条件;有利储盖组合具备“纵向分层系、平面分区带”的特征:纵向上,东、西部储盖组合分布存在差异,东部集中在渐新统和中新统,西部集中在古新统和始新统;平面上,东部有利储盖分布区集中在西湖凹陷,西部有利区集中在瓯江凹陷,盆地南部有利区分布在各构造单元的西侧斜坡。本文首次对东海陆架盆地CO_(2)储、盖层展开针对性评价,圈定有利储盖组合发育区,可以为华东地区CO_(2)离岸封存提供地质依据和应用参考。The East China Sea shelf basin,the largest offshore sedimentary basin in China,is recognized as an exceptional site for geological CO_(2)storage due to its substantial storage potential,proximity to carbon sources,and advanced exploration maturity.In this study,we investigated the basin’s structural and sedimentary geological conditions and established assessment criteria for reservoir-caprock layers by integrating drilling and seismic data,thereby optimizing reservoir-caprock combinations and delineating favorable zones.Results demonstrate that the Paleocene strata in the Oujiang Sag and the Oligocene-Miocene strata in the Xihu Sag exhibit favorable geological conditions for CO_(2)storage.Vertically,the distribution of reservoir-caprock combinations differs between the eastern and western regions.The eastern basin hosts predominantly in the Oligocene and Miocene sequences,while the western basin in the Paleocene and Eocene sequences.Horizontally,favorable zones in the eastern basin clustered within the Xihu Sag,whereas the western basin focused in the Oujiang Sag.In the southern basin,favorable zones distribute along the western slopes of structural units.This study presents the first targeted assessment of CO_(2)storage potential in the East China Sea shelf basin to identify optimal reservoir-caprock zones by combining sedimentary distribution patterns.The findings provide critical geological insights and practical references for implementing offshore CO_(2)storage strategies in East China.

关 键 词：东海陆架盆地 地质封存 储盖组合优选 封存潜力 咸水层 

分 类 号：P744.4[天文地球—海洋科学] P736