摘要
针对正则化因子选取困难问题,本文采用自适应正则化算法进行自动调整,并将此方法应用于圆锥型场源瞬变电磁共轭梯度反演。对3层、4层及5层典型地电模型开展自适应正则化反演计算,将反演结果与“烟圈”反演结果进行对比。研究结果表明:自适应正则化反演得到的电阻率更接近各层介质的真实电阻率,反演深度更接近层界面,提高了目标层界面的分辨能力,表现出良好的分层效果;自适应正则化反演得到的视电阻率曲线与理论模型吻合度更好,而“烟圈”反演的视电阻率曲线与理论模型偏差较大。
To solve the difficulty of selecting regularization factors in transient electromagnetic regularization inversion,in this paper,adaptive regularization algorithm is adopted for automatic adjustment,and further applied to the conjugate gradient inversion of transient electromagnetic conical field source.The adaptive regularization inversion calculation is applied in the three-layered,four-layered and five-layered typical geoelectric models,and compared with the smoke ring inversion.The results show that the adaptive regularized inversion resistivity is closer to the real resistivity of each layer,which has a good effect on the resistivity improvement;The adaptive regularized inversion depth approximates the layer interface,which improves the resolution of the target layer interface,and a certain stratification effect is also found;The apparent resistivity curve of adaptive regularized inversion is in good agreement with the apparent resistivity curve of the model,while the apparent resistivity curves of the“smoke ring”inversion are deviated from the model’s apparent resistivity curves.
作者
杨夫杰
杨海燕
姜志海
岳建华
刘志新
苏本玉
张华
李哲
汪凌
Yang Fujie;Yang Haiyan;Jiang Zhihai;Yue Jianhua;Liu Zhixin;Su Benyu;Zhang Hua;Li Zhe;Wang Ling(School of Geophysics and Measurement-Control Technology,East China University of Technology,Nanchang 330013,China;School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2022年第4期1328-1337,共10页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(41974086,41974128,41974151)
江苏省重大科技示范项目(BE2020644)
徐州市重点研发计划项目(KC20052)
关键词
瞬变电磁法
圆锥型场源
自适应正则化
共轭梯度
“烟圈”反演
transient electromagnetic method
conical source
adaptive regularization
conjugate gradient
“smoke king”inversion
作者简介
杨夫杰(1997—),男,硕士研究生,主要从事电磁法勘探理论与应用研究,E-mail:Yang_fujie@126.com;通信作者:杨海燕(1980—),男,教授,博士,主要从事电磁法勘探理论与应用研究,E-mail:yhyecit@163.com
