电磁测深新方法的基本原理

用电磁波探测深度在几千米范围以内地层电性结构作为识别条件,指出入射波与地层界面反射波场强的复振幅或波形的叠加必须是能反映层次结构的“阶梯式”叠加。给出利用波形前沿叠加得出地层电导率、厚度及界面深度的方法。分析结果表明,该办法可以实现,并能得到唯一解。

THE BASIC PRINCIPLE OF A NEW EM METHOD OF EXPLORATION

The conditions for different strata in the range of a few kilometers depth to be discriminated from one another by the EM method of expolration are discussed. It is found out that the "stepping" superposition of the complex amplitudes or the wave shapes of the electric field intensities of incident wave and reflected waves is needed in order to obtain a unique solution. It is especially described that the method is given by the superposition of wave-shape-fronts for surveying the electric conductivity and the thickness of a stratum and the depth of an interface. The application of the new EM method in practice is possible.