水平电偶源频率域电磁测深全区视电阻率的直接算法

来源期刊：中南大学学报(自然科学版)1996年第3期

论文作者：毛先进 鲍光淑

文章页码：253 - 256

关键词：频率域电磁测深; 全区视电阻率; 水平电偶源; 直接算法

Key words：frequency electromagnetic soundings; full-wave apparent resistivity; horizontal electric dipole; direct algorithm

摘    要：利用水平电偶源激发的电磁场,提出了直接精确计算全区视电阻率的方法.计算和分析结果表明,该方法的结果在远区等价于卡尼亚电阻率,在近区和过渡带则明显地改善了卡尼亚电阻率的非波区场畸变,从而能更好地接近基底的真电阻率,更形象地反映了地下介质的垂向电性变化.

Abstract: This paper presents a method to compute directly and accurately the full-wave apparent resistivity by using the electromagnetic field data from horizontal electric diapole.The calculation results and analysis show that in far-field area the results are equal to Cagniard resistivity,but in near-field area and transient area, the results have greatly improved the strong distortion of Cagniard resistivity. So the results can reach the true resistivity and indicate the changing features of conductivity of subsurface much better than Cagniard resistivity does.