水平电偶极源层状模型垂直磁场全区视电阻率计算方法

doi:10.11720/wtyht.2019.0325

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Abstract

Using the electromagnetic field formula of horizontal electric dipole source on the surface of layered model, the authors calculate electromagnetic field components of different transmitting and receiving distances and different layered geoelectric models systematically. The method for identifying frequency response by circular cross-correlation method and calculating the whole zone apparent resistivity is given. The apparent resistivity of the whole zone is calculated by using the E_x component of horizontal electric field and the H_z component of vertical magnetic field. Compared with the Cagniard apparent resistivity of layered model of magnetotelluric sounding and the Cagniard apparent resistivity of controlled source audio magnetotelluric sounding, the whole zone apparent resistivity of E_x component of horizontal electric field and the H_z component of vertical magnetic field can well reflect the geoelectric characteristics. Moreover, the whole zone apparent resistivity of the vertical magnetic field with the H_z component has similar frequency response characteristics with the Cagniard resistivity of the layered model of magnetotelluric sounding in low frequency band. As for deep buried basement, the whole zone apparent resistivity of the H_z component can respond well under the condition of small transceiver distance. The frequency of the vertical magnetic field component entering the near zone is lower than that of the horizontal electric field entering the near zone, which proves the proposed means is more conducive to deep exploration under the condition of small transceiver distance.

Key words： horizontal electric dipole source layered model vertical magnetic field horizontal electric field apparent resistance of the whole region

Received: 24 June 2019 Published: 28 November 2019

P631

Corresponding Authors: Wei-Bin LUO E-mail: Email:lwbcsu@163.com

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	Articles by authors
	Hai-Tao FU
	Wei-Bin LUO
	Zhi-Jun DING
	Qi-Lin YU
	Shi-Kuan ZHANG

Cite this article:

Hai-Tao FU,Wei-Bin LUO,Zhi-Jun DING, et al. The calculation method of whole zone apparent resistivity of vertical magnetic field on the surface of layered model excited by horizontal electric dipole source[J]. Geophysical and Geochemical Exploration, 2019, 43(6): 1309-1319.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2019.0325 OR https://www.wutanyuhuatan.com/EN/Y2019/V43/I6/1309

Layered geoelectricity model with horizontal electric dipole source

D type geoelectricity model parameters

whole zone apparent resistivity spectrum of D-type geoelectricity model with horizontal electric dipole Source

G type geoelectricity model parameters

whole zone apparent resistivity spectrum of G-type geoelectricity model with horizontal electric dipole Source

H type geoelectricity model parameters

whole zone apparent resistivity spectrum of H-type geoelectricity model with horizontal electric dipole Source

K type geoelectricity model parameters

whole zone apparent resistivity spectrum of K-type geoelectricity model with horizontal electric dipole Source

KH type geoelectricity model parameters

whole zone apparent resistivity spectrum of KH-type geoelectricity model with horizontal electric dipole source with different transmit-receive distance

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