一维大地电磁与电性源瞬变电磁联合反演研究  

Study on one-dimentional joint inversion of magnetotelluric and transient electromagnetic methods

作　　者：涂君 周军 牟泽霖[1] TU Jun;ZHOU Jun;MU Zelin(Guangzhou Marine Geological Survey,Guangzhou 510760,China;School of Resources and Environment,University of Electronic Science and Technology of China,Chengdu 610059,China)

机构地区：[1]广州海洋地质调查局,广州510760 [2]电子科技大学资源与环境学院,成都610054

出　　处：《物探化探计算技术》2022年第4期452-458,共7页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(91428205)。

摘　　要：单独大地电磁或电性源瞬变电磁对具体地质任务反演,往往存在两种方法的电阻率反演结果不具备很强的对应性问题,造成后期地质解释的困难。这里实现了大地电磁与电性源瞬变电磁数据联合反演,提高了对浅部地层的识别能力和加强了深部信息。以大地电磁和电性源瞬变电磁两种方法探测灵敏度分析为基础,基于OCCAM反演方法,实现联合反演算法;通过模型设计与试算,验证了此方法对比于单独大地电磁或电性源瞬变电磁,能提高对浅部地层的识别能力和加强深部信息。该方法为实测资料的MT和TEM联合解释提供可能,以更好地服务于实际电法勘探项目,提升地电模型解释可靠性。The inversion results of magnetotelluric data or transient electromagnetic data often do not have strong correspondence to specific geological tasks,resulting in difficulties in later geological interpretation.In this paper,the joint inversion of MT and TEM has been realized,which improves the ability to identify shallow strata and strengthens the deep information.Based on the detection sensitivity analysis,the joint inversion programming is realized based on OCCAM inversion method.Through processing the synth data,it is verified that the joint inversion can improve the recognition ability of shallow stratum and strengthen the deep information.The joint inversion provides the possibility to jointly interpret the MT and TEM measured data,and then it can be used to better serve the actual electrical exploration projects and improve the reliability of geoelectric model interpretation.

关 键 词：大地电磁 电性源瞬变电磁 联合反演 

分 类 号：P631.2[天文地球—地质矿产勘探]