摘要
提出一种基于积分方程法的场源效应校正方法,以电偶源的水平电场分量Ex为研究对象,通过数值模拟验证该校正方法的有效性,并将其应用于实际资料处理中。结果表明,对于各向同性介质,基于积分方程法,采用等效异常体对场源效应进行校正的方法是可行和有效的。处理实际数据时,该校正方法将位于不同地质构造上的场源归一化,在保留各测点数据差异性的同时消除场源导致的差异,校正结果整体符合预期。
A novel method for source effect correction based on integral equation method is proposed.By taking the electrical horizontal field Ex of current source as an example,the correction method is validated using both simulated data and field data.The results show that the correction method is feasible and effective for isotropic media.When the field data are processed,the correction method normalizes the sources with different geological structures,which eliminates the geological difference among sources,and retains the geological difference among receivers.The correction results are in line with the expectation in whole.
作者
袁博
李帝铨
胡艳芳
Bo YUAN;Di-quan LI;Yan-fang HU(Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring of Ministry of Education(Central South University),Changsha 410083,China;Hunan Key Laboratory of Non-ferrous and Geological Hazard Detection,Changsha 410083,China;School of Geosciences and Info-Physics,Central South University,Changsha 410083,China)
基金
Project(2018YFC0807802)supported by the National Key R&D Program of China
Project(41874081)supported by the National Natural Science Foundation of China。
关键词
场源效应
人工源电磁法
场源复印效应
阴影效应
source effect
controlled-source electromagnetics
source overprint effect
shadow effect
