海洋地质与第四纪地质2024，Vol.44Issue(6)：204-215,12.DOI:10.16562/j.cnki.0256-1492.2023071902
海洋CSEM法探测海底淡水资源可行性初探
The feasibility of marine CSEM method for detecting offshore freshened groundwater reservoirs
摘要
Abstract
Offshore freshened groundwater(OFG)is a natural freshwater resource located mainly in the continental shelf region,from either onshore coastal aquifers or paleo-channels formed in sea-level lowstands.Conventional seismic methods have certain limitations in identifying salinity changes.Fortunately,the marine CSEM(controlled source electromagnetic method)is sensitive to high-resistivity thin layers,which is beneficial for detection of OFG by analyzing electromagnetic anomalies caused by the contrast of resistivity between the freshwater reservoirs and surrounding sediments.Paleo-channels in Shengsi in the Yangtze River estuary were studied.Based on the hydrogeological and logging data of"Shengsi No.1 Well",a geoelectric model was established to analyze the marine CSEM responses.Results indicate that the marine CSEM could effectively detect electromagnetic anomalies caused by high-resistivity thin layers,and has good ability to locate underground freshwater reservoirs;its application for the detection of OFG in the Shengsi paleo-channel is feasible.关键词
海洋可控源电磁法/海底淡水/可探测度/嵊泗Key words
marine CSEM/OFG/detectivity/Shengsi分类
海洋科学引用本文复制引用
吴晓婷,李予国,段双敏..海洋CSEM法探测海底淡水资源可行性初探[J].海洋地质与第四纪地质,2024,44(6):204-215,12.基金项目
国家重点研发计划政府间国际科技创新合作项目"海底淡水资源的海洋地球物理探测技术"(2021YFE0108800) （2021YFE0108800）
中国博士后科学基金资助项目(2022M712986) （2022M712986）
