The all-time apparent resistivity bisearch numerical algorithm based on long offset transient electromagnetic method
Chen Qing-li1, Yan Liang-jun1, Fu Zhi-hong2, Su Zhu-liu1
1. Institute of Geophysics and Petroleum Resources, Yangtze University, Jingzhou City, Hubei Province, 434023, China;
2. Institute of Electrical Engineering, Chongqing University, Chongqing City, 400044, China
Abstract：The rule of induced electromotive force curve with resistivity change in long offset transient electromagnetic method was studied and analyzed in this paper,it is understood that at any moment the increase of the induced electromotive force with resistivity shows a piecewise monotone feature. Based on the feature the bisearch numerical algorithm which calculates all-time apparent resistivity was designed in this paper. By utilizing induced electromotive force data the algorithm directly calculates apparent resistivity values at different moments,The calculation for theoretical data shows that the algorithm is very accurate,its relative error is less than 0.1 percent,the basic idea,detailed steps and exact flowchart for the bisearch numerical algorithm were introduced in this paper.
陈清礼, 严良俊, 付志红, 苏朱刘. 长偏移距瞬变电磁法全区视电阻率的二分搜索数值算法[J]. 石油地球物理勘探, 2009, 44(6): 779-782.
Chen Qing-li, Yan Liang-jun, Fu Zhi-hong, Su Zhu-liu. The all-time apparent resistivity bisearch numerical algorithm based on long offset transient electromagnetic method. OGP, 2009, 44(6): 779-782.
