地球物理学进展 ›› 2019, Vol. 34 ›› Issue (4): 1411-1422.doi: 10.6038/pg2019CC0188

• 应用地球物理学Ⅰ(油气及金属矿产地球物理勘探) • 上一篇    下一篇

大地电磁测深方法数据处理进展

邓琰,汤吉()   

  1. 中国地震局地质研究所,地震动力学国家重点实验室,北京 100029
  • 收稿日期:2018-09-11 修回日期:2019-05-06 出版日期:2019-08-20 发布日期:2019-08-30
  • 通讯作者: 汤吉 E-mail:tangji@ies.ac.cn
  • 作者简介:邓琰,男,1983年生,博士研究生,主要从事电磁法数据处理和解释工作.(E-mail: dengyan@ies.ac.cn)
  • 基金资助:
    国家自然科学基金项目(41674081)

Advances in magnetotelluric data processing

DENG Yan,TANG Ji()   

  1. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China
  • Received:2018-09-11 Revised:2019-05-06 Online:2019-08-20 Published:2019-08-30
  • Contact: Ji TANG E-mail:tangji@ies.ac.cn

摘要:

随着社会经济的发展,交通、电力、通讯网络的密集化,大地电磁法受到干扰的幅度和频带也在不断的增强和拓宽.有效的噪声消除或抑制方法是获得高质量大地电磁测深响应资料的前提,长期以来,有关学者一直在持续开展对大地电磁数据处理方法的研究,当前最有效也是应用最广的依然是带远参考的robust方法.本文在简要介绍大地电磁主要噪声干扰源的基础上,详细介绍了当前大地电磁抑制干扰的有效方法,包括时间域去噪、时频分析、阻抗分析等,并从时域和频域两个方面列举了两个较有意义的数据处理方法.

关键词: 大地电磁法, 数据处理, 阻抗估计, 去噪

Abstract:

With the development of social economic, transportation, electricity and communications network become more and more intensive, the amplitude and band of disturbance in magnetotelluric have also been enhanced and expanded. For the Magnetotelluric method(MT), an effective noise canceling or suppression method was the premise to obtain real sounding of underground electricity structure. There are so many magnetotelluric data processing methods, but the most effective is still the most widely used with a robust remote reference method. This paper based on briefly describes the main magnetotelluric noise sources, then introduced the currently effective electromagnetic interference suppression methods in details, including time domain noise suppression, time-frequency analysis, impedance analysis, et al., and list two more meaningful data processing methods from time and frequency domain.

Key words: Magnetotelluric method, Data processing, Impedance estimation, De-noising

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