Calculation of Apparent Resistivity in Large Fixed Loop TEM by Simulated Annealing Algorithm
详细信息
- 责任者：Li Jianhui (School of Geophysics and Info-Physics ; Central South University ; Changsha 410083 ; China) ; Zhu Ziqiang
- 刊名：Oil Geophysical Prospecting
- 出版年：2011
- 卷期：46(1)
- 关键词：瞬变电磁法 ; transient electromagnetic methods ; 模拟退火算法 ; simulated annealing algorithms
- 页码：p.138-142
- 图表：3 illus., 1 table, 16 refs.
- 分类号：1600
- issnNo：ISSN1000-7210
- isbnNo：CN13-1095/TE
摘要
The apparent resistivity of measured point inside rectangular transmitting loop in large fixed loop TEM can be calculated by using simulated annealing algorithm to fit theoretical induction electromotive force and measured induction electromotive force. The precision and stability of algorithm is verified by using the homogeneous half-space and 3-layerd geoelectric models in this paper. The calculated results showed the most errors between apparent resistivity and true resistivity are within 0.5% and part errors which meet the random distribution are between 1.5～6.0%. It only requires about forty times of calculation in each iteration procedure,and then the high precision apparent resistivity can be obtained.