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。
The definition of effective resistivity used in electromagnetic sounding induced by hori-zontal electric dipole on layered earth and its algorithms was discussed.Theoretical analysisshows that the effective resistivity possesses reasonable characteristics and displays well inall areas of electromagnetic sounding.So it can correct the so-called non-plane-wave effectwell in frequency domain electromagnetic sounding.A great deal of application shows the
definition and algorithms of the effective resistivity are valid and feasible.
基金
中国国家自然科学基金资助
美国国家自然科学基金
关键词
等效电阻率
电偶极子
电距离
effective resistivity
electric dipole
electric distance
transition area
non-planewave effect
