吉林大学学报(地球科学版) ›› 2016, Vol. 46 ›› Issue (6): 1830-1836.doi: 10.13278/j.cnki.jjuese.201606301

• 地球探测与信息技术 • 上一篇    下一篇

时间域航空电磁电阻率和磁导率全时反演

李世文, 殷长春, 翁爱华   

  1. 吉林大学地球探测科学与技术学院, 长春 130026
  • 收稿日期:2016-03-09 出版日期:2016-11-26 发布日期:2016-11-26
  • 通讯作者: 殷长春(1965),男,教授,国家"千人计划"特聘专家,主要从事电磁勘探理论,特别是航空和海洋电磁方面的研究,E-mail:yinchangchun@jlu.edu.cn E-mail:yinchangchun@jlu.edu.cn
  • 作者简介:李世文(1988),男,博士研究生,主要从事航空和地磁测深正反演研究,E-mail:lisw15@mails.jlu.edu.cn
  • 基金资助:
    国家重大科研装备研制项目（ZDYZ2012-1-03）；国家自然科学基金项目（41274121）；国土资源部老矿山复核项目（中地调研合同[2013]第214号）

Full-Time Inversion of Time-Domain AEM Data for Resistivity and Magnetic Permeability

Li Shiwen, Yin Changchun, Weng Aihua   

  1. College of GeoExploration Sciences and Technology, Jilin University, Changchun 130026, China
  • Received:2016-03-09 Online:2016-11-26 Published:2016-11-26
  • Supported by:
    Supported by Projects on the Development of the Key Equipment of Chinese Academy of Sciences (ZDYZ2012-1-03), China Natural Science Foundation (41274121) and Old Mine Review Project of Ministry of Land and Resources(China Geological Survey Project Agreement[2013] No.214)

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摘要： 为了减小时间域航空电磁法在强磁性地区应用时产生的磁极化电流对反演的影响，提出了一种在雅可比矩阵中加入磁导率偏导数，将电阻率、磁导率和层厚进行全时同步反演的方法。将磁性均匀半空间模型、单个磁性模型和多个磁性层模型的时间域响应添加高斯噪声作为模拟数据进行全时反演，得到的模型与理论模型拟合较好，拟合误差均在3%以下，验证了本文算法的有效性，说明在强磁性地区本文提出的算法能有效解决地下介质的电性分布。

关键词: 时间域, 航空电磁, 电阻率, 磁导率, 反演

Abstract: In order to reduce the influence of magnetic polarization currents on inversion result, when applying time-domain airborne electromagnetic method(AEM) in areas with high magnetic permeability, we present a new algorithm in this paper. We achieve it by adding the partial derivative of full-time AEM responses with respect to the magnetic permeability into Jacobi matrix and inverting the resistivity, magnetic permeability and thickness simultaneously. We have tested the effectiveness of our algorithm by inverting the responses with Gaussian noise of a series of typical models, such as the magnetic homogeneous half-space model, a single or multi-layer with high permeability in a layered model, and all with RMS (root-mean-square) error below 3%. The results demonstrate that our algorithm can be used to obtain the underground electrical structures in areas with high magnetic permeability.

Key words: time-domain, airborne EM, resistivity, magnetic permeability, inversion

中图分类号: 

  • P631.3
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