|Table of Contents|

Review on Three-dimensional Simulations of Transient Electromagnetic Field(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2021年第03期
Page:
559-567
Research Field:
应用地球物理
Publishing date:

Info

Title:
Review on Three-dimensional Simulations of Transient Electromagnetic Field
Author(s):
XUE Guo-qiang1; 2; 3; 4;  CHANG Jiang-hao1; 2; 3; 5*;  LEI Kang-xin1; 2; 3;  CHEN Kang6
(1. Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China; 2. College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; 3. Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing 100029, China; 4. The Third Geological Exploration Institute of Qinghai Province, Xining 810000, Qinghai, China; 5. Hebei Key Laboratory of Strategic Critical Mineral Resources, Hebei GEO University, Shijiazhuang 050031, Hebei, China; 6. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China)
Keywords:
transient electromagnetic method;  three-dimentional simulation;  finite difference method;  finite element method;  fast and fine simulation;  quasi-static equation;  field source effect;  polarization effect
PACS:
P631
DOI:
10.19814/j.jese.2020.11029
Abstract:
Transient electromagnetic method(TEM)has been widely used in the mineral resources detection and environment engineering exploration. Up to now, the most commonly used forward simulation methods for TEM response contain integral equation method, finite difference method, finite volume method and finite element method. With the more complex exploration conditions and the much higher detection accuracy demand, it's of importance to study the high-resolution three-dimentional simulations of TEM to further improve the data processing and interpretation technologies. The research progress on three-dimentional TEM forward simulations was introduced in detail. Besides, the key technologies of finite difference method, such as the construction of quasi-static difference equation, the loading of emission source and boundary conditions, were analyzed. The key problems of the finite element method, such as the space discretization, time discretization and the solving of large linear equations, were put foward. It is concluded that to provide theory support for high-resolution detection of TEM in three-dimentional forward simulation is required to solve the following problems: carrying out response calculations of the field source effect, complex topography problem, polarization effect related to near-field methods, realizing multi-source and multi-components TEM forward modeling of special application situation.

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Last Update: 2021-05-01