电磁测深方法研究

A study of the EM method to explore strata

为能够实施电磁测深新方法的基本原理,并为研制探测仪器提供一些依据,分析和讨论了源信号为尖脉冲时,入射波与地层反射波通过二阶带通滤波器的输出波形;利用反射波与入射波前沿瞬态叠加的波形,反演地层的电导率和厚度的方法及与探测仪器有关的主要问题等内容.结果表明,反演仍能给出惟一解,并具有可实践性.

In order to apply the basic principle of a new EM method of exploration to practice and to provide some bases for developing equipment, the following three problems are analyzed and discussed： When the source signal is a sharp electromagnetic pulse, the output waveforms of the second-order band-pass filter of incident wave and reflected waves; the inversion method by using the waveform of transient superposition of incident waveform-front and reflected waveform-fronts to get electric conductivity and thickness of strata; and the key problem in the design of sounding equipment. The result shows that the solution is still unique and application to practice is possible.