三维轴向各向异性介质中大地电磁阻抗和倾斜数据联合反演

IF 1 4区工程技术 Q4 ENGINEERING, GEOLOGICAL

Journal of Environmental and Engineering Geophysics Pub Date : 2020-03-01 DOI:10.2113/JEEG19-022

Wei Luo, Kunpeng Wang, Hui Cao, Changsheng Duan, Tao Wang, Xingxiang Jian

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引用次数: 1

摘要

大地电磁阻抗和自旋数据可以用来反映地下构造信息。然而，当异常体的轴向各向异性被标记时，将严重影响大地电磁测量数据。本研究将大地电磁场划分为一次分量和二次分量，并用轴向各向异性电导率代替三维控制方程中的电导率参数。分析了轴向各向异性对大地电磁学倾斜数据的影响，利用有限记忆Broyden-Fletcher-Goldfarb-Shanno方法实现了阻抗和倾斜数据的三维大地电磁学轴向各向异性反演。试验结果表明，结合阻抗和倾斜度数据的反相轴向各向异性模型的分辨率要优于仅使用阻抗数据的模型。

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Joint Inversion of Magnetotelluric Impedance and Tipper Data in 3D Axial Anisotropic Media

Magnetotelluric (MT) impedance and tipper data can be utilized to reflect underground structural information. However, when the axial anisotropic property of an abnormal body is marked, it will seriously influence MT measuring data. This study divides the MT field into primary and secondary components and replaces the conductivity parameter in a three-dimensional (3D) governing equation with axial anisotropic conductivity. Analysis of the influence of axial anisotropy on MT tipper data is presented, and a limited-memory Broyden-Fletcher-Goldfarb-Shanno method is then utilized to realize a 3D MT axial anisotropic inversion with impedance and tipper data. The tests presented in this paper show that the resolution of the inverting axial anisotropic model with impedance and tipper data is better than that of only using impedance data.

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来源期刊

Journal of Environmental and Engineering Geophysics 地学-地球化学与地球物理

CiteScore

2.70

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： The JEEG (ISSN 1083-1363) is the peer-reviewed journal of the Environmental and Engineering Geophysical Society (EEGS). JEEG welcomes manuscripts on new developments in near-surface geophysics applied to environmental, engineering, and mining issues, as well as novel near-surface geophysics case histories and descriptions of new hardware aimed at the near-surface geophysics community.