水平电偶极子源的场分量等效电阻率

来源期刊：中南大学学报(自然科学版)1993年第2期

论文作者：汤井田 何继善

文章页码：137 - 142

关键词：等效电阻率; 电偶极子; 电距离; 中间区; 非波区效应

Key words：effective resistivity; electric dipole; electric distance; transition area; non-planewave effect

摘    要：讨论了水平电偶极子源的各场分量等效电阻率的定义及其迭代算法。对它们渐近特性的分析表明,各种场分量等效电阻率,在波区收敛于相应的波区视电阻率;在近区收敛于用近区公式定义的视电阻率或一水平渐近线,其值由收发距和地电参数决定;在中间区,随电距离的变化,等效电阻率自适应地、均匀地从波区特性变化到近区特性,表现出合理而良好的特性。大量的数值计算和野外数据处理表明该方法具有良好的前景,从而为广泛、合理地利用中间区的频域电磁测深作了理论准备。

Abstract: The definition of effective resistivity used in electromagnetic sounding induced by hori-zontal electric dipole on layered earth and its algorithms was discussed. Theoretical analysis shows that the effective resistivity possesses reasonable characteristics and displays well in all areas of electromagnetic sounding. So it can correct the so-called non-plane-wave effect well in frequency domain electromagnetic sounding. A great deal of application shows the definition and algorithms of the effective resistivity are valid and feasible.