Comparison of 3D controlled-source electromagnetic forward modeling based on the nodal finite element and the edge-based finite element

被引：0
|
作者：
Tang W. [1 ]
Liu J. [2 ]
Ye Y. [1 ]
Zhang H. [1 ]
机构：
[1] School of Geophysics and Measurement-Control Technology, East China University of Technology, Nanchang, 330013, Jiangxi
[2] School of Geosciences and Info-physics, Central South University, Changsha, 410083, Hunan
来源：
Tang, Wenwu (tang_wenwu@sina.com) | 2018年 / Science Press卷 / 53期
关键词：
3D forward modeling; Controlled-source electromagnetic (EM); Edge element; Nodal element;
D O I：
10.13810/j.cnki.issn.1000-7210.2018.03.022
中图分类号：
学科分类号：
摘要：
In the early stage, the nodal element was mainly used for the forward modeling of the 3D controlled-source electromagnetic (EM) responses, but its spurious mode affected calculation efficiency and solution accuracy. The edge-based finite element method is increasingly adopted in the 3D EM modeling since it can avoid spurious solutions. To study details of the efficiency and accuracy between these two methods, comparison experiments are carried out. First the construction of the boundary-value problem is discussed. Then the forward modeling based on these two methods are achieved on both a horizontal-layered model and a single low-resistivity body model. Our comparison experiments show that under the same modeling condition, the result accuracy with the edge-based finite element is better than that with the nodal element while the edge element is slower than the nodal element as the first one spends about twice of calculation time of the latter one. © 2018, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.
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页码：617 / 624
页数：7
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