Sensitivity of Marine Controllable Source Electromagnetic Soundings for Identifying Plume Migration in Offshore CO_(2) Storage  

海上CO_(2)封存羽流迁移的海洋可控源电磁测深识别灵敏度

作　　者：Ning Qiu Chunwu Pan Yongheng Zhang Bin Liu Zhen Sun Pengchun Li 邱宁;潘春梧;张永恒;刘彬;孙珍;李鹏春

机构地区：[1]Key Laboratory of Ocean and Marginal Sea Geology,South China Sea Institute of Oceanology,Sanya Institute of Ocean Eco-Environmental Engineering,Key Laboratory of Tropical Oceanography,Chinese Academy of Sciences,Guangzhou 511458,China [2]Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《哈尔滨工程大学学报（英文版）》2024年第3期656-673,共18页Journal of Marine Science and Application

基　　金：Supported by Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (2019BT02H594);Sanya Technology Innovation Special Project (2022KJCX08)。

摘　　要：Offshore carbon dioxide(CO_(2)) storage is an effective method for reducing greenhouse gas emissions. However, when using traditional seismic wave methods to monitor the migration of sequestration CO_(2) plumes, the characteristics of wave velocity changes tend to become insignificant beyond a certain limit. In contrast, the controllable source electromagnetic method(CSEM) remains highly sensitive to resistivity changes. By simulating different CO_(2) plume migration conditions, we established the relevant models and calculated the corresponding electric field response characteristic curves, allowing us to analyze the CSEM's ability to monitor CO_(2) plumes. We considered potential scenarios for the migration and diffusion of offshore CO_(2) storage, including various burial depths, vertical extension diffusion, lateral extension diffusion,multiple combinations of lateral intervals, and electric field components. We also obtained differences in resistivity inversion imaging obtained by CSEM to evaluate its feasibility in monitoring and to analyze all the electric field(Ex, Ey, and Ez) response characteristics. CSEM has great potential in monitoring CO_(2) plume migration in offshore saltwater reservoirs due to its high sensitivity and accuracy. Furthermore, changes in electromagnetic field response reflect the transport status of CO_(2) plumes, providing an important basis for monitoring and evaluating CO_(2)transport behavior during storage processes.

关 键 词：Offshore carbon dioxide storage Geophysics Resistivity inversion Monitoring Plume migration Marine controllable source electromagnetic method 

分 类 号：X701[环境科学与工程—环境工程] P75[天文地球—海洋科学] P631.325