| 瞬变电磁法三维模拟计算研究进展 |
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| 引用本文： | 薛国强,常江浩,雷康信,陈康.瞬变电磁法三维模拟计算研究进展[J].地球科学与环境学报,2021(3):559-567. |
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| 作者姓名： | 薛国强 常江浩 雷康信 陈康 |
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| 作者单位： | 中国科学院地质与地球物理研究所中国科学院矿产资源研究重点实验室;中国科学院大学地球与行星科学学院;中国科学院地球科学研究院;青海省第三地质勘查院;河北地质大学河北省战略性关键矿产资源重点实验室;中国水利水电科学研究院流域水循环模拟与调控国家重点实验室 |
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| 基金项目： | 第二次青藏高原综合科学考察研究专题(2019QZKK0804);国家自然科学基金项目(42030106,42074121);中国科学院科研仪器设备研制项目(YJKYYQ20190004);中国博士后科学基金项目(2020M670442);自然资源部煤炭资源勘查与综合利用重点实验室开放项目(KF2020-3)。 |
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| 摘 要： | 瞬变电磁法应用于矿产资源、环境工程等领域。目前主流的瞬变电磁三维正演模拟方法包括积分方程法、有限差分法、有限体积法和有限元法。随着观测环境的复杂化以及探测精度要求的提高,有必要研究瞬变电磁法高精度三维模拟计算,以便推动数据处理解释方法的进步。本文系统介绍了瞬变电磁三维正演计算研究进展,分析了准静态差分方程的构建和发射源的加载及边界的处理等有限差分法的关键技术,厘定出空间和时间离散以及大型线性方程组的求解等有限元法的难题。瞬变电磁数值模拟今后的发展方向是深入开展近源情况下受场源效应、复杂地形、极化效应等影响的三维模拟,以及特殊场情况下的多源多分量响应计算,为瞬变电磁法精细探测提供理论支撑。
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| 关 键 词： | 瞬变电磁法 三维计算 有限差分法 有限元法 快速精细模拟 准静态方程 场源效应 极化效应 |
Review on Three-dimensional Simulations of Transient Electromagnetic Field |
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| XUE Guo-qiang,CHANG Jiang-hao,LEI Kang-xin,CHEN Kang.Review on Three-dimensional Simulations of Transient Electromagnetic Field[J].Journal of Earth Sciences and Environment,2021(3):559-567. |
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| Authors: | XUE Guo-qiang CHANG Jiang-hao LEI Kang-xin CHEN Kang |
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| Institution: | (Key Laboratory of Mineral Resources,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing 100029,China;The Third Geological Exploration Institute of Qinghai Province,Xining 810000,Qinghai,China;Hebei Key Laboratory of Strategic Critical Mineral Resources,Hebei GEO University,Shijiazhuang 050031,Hebei,China;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China) |
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| 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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| 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 |
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