The Finite Element Method for Modeling 2D High-Frequency Electro Magnetic with Continuous Variation of Conductivity within Each Block
详细信息
- 责任者：Dai Qianwei (School of Geosciences and Info-Physics ; Central South University ; Changsha 410083 ; China) ; Zhang Fuqiang
- 刊名：Computing Techniques for Geophysical and Geochemical Exploration
- 出版年：2012
- 卷期：34(5)
- 关键词：大地电磁法 ; magnetotelluric methods
- 页码：p.552-558
- 图表：3 illus., 17 refs.
- 分类号：1600
- issnNo：ISSN1001-1749
- isbnNo：CN51-1242/P
摘要
In order to meet the actual needs of the electrical parameters’ continuously changes in the horizontal direction and vertical direction,this paper studies high-frequency electromagnetism’s high precision of piecewise linear variable conductivity and its fast forward modeling.First,given the two-dimensional high-frequency electromagnetic variation problems,the finite element method to simulate logging when conductivity is piecewise linear variable,and developed a corresponding finite element program.Calculating a layered model with this procedure,and comparing it with the analytical results,it proved the correctness and effectiveness of the program.Then the conductivity with depth for a typical linear model and a typical rift valley model were forward modeling,the results show that the conductivity in the horizontal and vertical direction can be effectively solved in piecewise linear variable electromagnetic forward modeling problem.