基于三维数值模拟的激电法差分装置响应特征分析

doi:10.13810/j.cnki.issn.1000-7210.2023.05.021

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Abstract To analyze the response properties of the induced polarization (IP) differential device, this paper proposes a high-precision and high-efficiency 3D numerical simulation method.The proposed method transforms the 3D IP numerical simulation problem into a 1D numerical simulation problem in the wavenumber domain using a 2D Fourier transform method and solves it using a 1D finite element method.Operators are introduced for iterative computations, which eventually lead to high-precision numerical solutions.This approach avoids directly solving large sparse linear equations, greatly reducing the computational complexity and storage requirements and improving computational efficiency.The paper uses the proposed 3D numerical simulation method as a tool to analyze the response properties of the IP differential device.The test results of a high-polarization anomalous bulk model with high/low resistance indicate that the differential device for single well-well azimuthal measurement has a better resolution effect on blind ore near the well than the other devices, and the low resistance body has a stronger sensitivity to current than the high resistance body.Tests of low-resistance and high-polarization anomalous bulk models using different background media have shown that the apparent resistivity and polarizability of the differential device under well-ground measurement conditions can more accurately reflect the vertical spatial distribution properties of the background media and the anomalous bulk than those of pole-pole device.Therefore, the IP differential device has an advantage over the other devices, and the research conclusions can provide a reference for the selection of field exploration and measurement equipment.

Key words： induced polarization method 2D Fourier transform 3D numerical simulation differential device response characteristics of electromagnetic method

Received: 18 August 2022

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P631

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	LING Jiaxuan
	CHEN Zhifang
	DENG Wei
	DAI Shikun
	ZHOU Yinming
	CHEN Qingrui

Cite this article:

LING Jiaxuan,CHEN Zhifang,DENG Wei等. Analysis of response characteristics of IP differential device based on 3D numerical simulation[J]. OGP, 2023, 58(5): 1244-1254.

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http://www.ogp-cn.com/EN/10.13810/j.cnki.issn.1000-7210.2023.05.021 OR http://www.ogp-cn.com/EN/Y2023/V58/I5/1244

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