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Method and device for two-dimensional inversion of electric field data by magnetotelluric te polarization model

A magnetotelluric and electric field technology, which is applied in the field of two-dimensional inversion of electric field data by magnetotelluric TE polarization mode, can solve the problems of low inversion resolution and complicated two-dimensional inversion calculation of magnetotelluric and geomagnetism, so as to ensure stability and The effect of precision

Active Publication Date: 2022-03-11
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0005] Based on this, it is necessary to address the above technical problems and provide a method and device for two-dimensional inversion of electric field data by magnetotelluric TE polarization mode that can solve the problems of complex calculation of two-dimensional geomagnetic inversion and low inversion resolution.

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  • Method and device for two-dimensional inversion of electric field data by magnetotelluric te polarization model
  • Method and device for two-dimensional inversion of electric field data by magnetotelluric te polarization model
  • Method and device for two-dimensional inversion of electric field data by magnetotelluric te polarization model

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[0057] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0058] In one embodiment, such as figure 1 As shown, a two-dimensional inversion method for electric field data by magnetotelluric TE polarization mode is provided, including the following steps:

[0059] Step 102: Observing electric field data components at different frequencies of multiple observation points along the X-axis direction in the root survey line and calculating electric field data components at different frequencies of observation points along the X-axis, constructing an inversion objective function under the magnetotelluric TE polarization mode.

[0060] T...

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Abstract

The present application relates to a method and device for two-dimensional inversion of electric field data by magnetotelluric TE polarization modes. The method includes: observing electric field data components at different frequencies of multiple observation points along the X axis in the survey line and calculating the electric field data components at different frequencies of the observation points along the X axis, and constructing an inversion objective function under the magnetotelluric TE polarization mode ; By inverting the objective function, the inversion iterative equations corresponding to the inversion objective function are obtained; by introducing the normalized electric field data component error and replacing the measured magnetic field Hy component with the calculated magnetic field Hy component, the actual fitting is Zhang Quantitative impedance data; According to the mathematical expression of the normalized electric field data component error, calculate the Jacobian matrix, calculate the inversion iterative equation group according to the Jacobian matrix and the normalized electric field data component error, according to the inversion iterative equation group The electric field data were inverted in 2D. Using this method can improve the calculation efficiency and inversion accuracy of two-dimensional inversion.

Description

technical field [0001] The present application relates to the technical field of two-dimensional inversion of the geomagnetic field, in particular to a method and device for two-dimensional inversion of electric field data by magnetotelluric TE polarization modes. Background technique [0002] The magnetotelluric sounding method (MT) was proposed by Tikhonov (1950) and Cagniard (1953) in the 1950s. This method is a geophysical method for studying the electrical properties and distribution characteristics of the earth model through natural alternating electromagnetic fields. detection method. By studying the frequency response of the earth to the natural electromagnetic field, it obtains the distribution information of the resistivity of the underground medium at different depths. The magnetotelluric sounding method has great penetration depth and resolution ability, and has been widely used in the deep structure of the crust and upper mantle, minerals and geothermal resourc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/40
CPCG01V3/40
Inventor 张钱江戴世坤熊彬陈龙伟王有学何宏昌
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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