海洋地质前沿2025，Vol.41Issue(3)：25-34,10.DOI:10.16028/j.1009-2722.2025.024
海域咸水层二氧化碳地质封存效率因子研究
Research on efficiency of CO2 geological storage in saline aquifers in clastic rock reservoirs in Xihu Sag,East China Sea
摘要
Abstract
Potential for geological carbon dioxide storage in saline aquifers in Chinese maritime territories is sub-stantial.However,considerable disparities in storage efficiency complicated the determination of the effective storage capacity.To enhance the accuracy and regional applicability of effective storage capacity estimation,we reviewed the key factors influencing efficiency coefficients and identified globally applicable methods for the cal-culation.By integrating seismic,drilling,logging,and core data,we employed statistical techniques for parameter optimization,with which both precision and accuracy of the calculations were improved.Additionally,we pro-posed a workflow from selecting and calculating efficiency coefficients based on various data sources.The saline water in clastic rocks in the Xihu sag,East China Sea was studied as the case.Results show that saline water in the Yuquan Formation and Longjing Formation are characterized by rich sand bodies with large thickness and mul-tiple sets of reservoir-caprock.Among them,delta plain channel bar deposits are favorable microfacies for CO2 se-questration.Specifically,the storage efficiency of the Yuquan Formation is 6.9%,which is 2.9%higher than that of the Longjing Formation.Based on the storage efficiency,we estimated that the effective storage capacity of the saline aquifers in the Yuquan and Longjing formations in the Xihu Sag is approximately 820 million tons.The Yuquan Formation in the western slope zone exhibits the highest storage potential and could be the optimal place for CO2 sequestration in the Xihu Sag,and can be also considered a good candidate of a pilot area for CO2 se-questration.关键词
海域二氧化碳封存/咸水层/效率因子/有效封存量/封存场址优选Key words
marine carbon dioxide storage/saline aquifer/storage efficiency/effective storage capacity/optimal storage site分类
海洋学引用本文复制引用
赵天沛,于春野,刘方圆,李久娣,严曙梅..海域咸水层二氧化碳地质封存效率因子研究[J].海洋地质前沿,2025,41(3):25-34,10.基金项目
中国石油化工股份有限公司科技项目"东海西湖凹陷CO2地质封存技术研究"(P22175) （P22175）
