CAJ | 학술논문

电磁耦合感应是频谱激电法中一种很强的干扰因素，尤其在低阻区和大极距测量时，影响了探测深度和探测效果。国内目前主要的去除电磁耦合的方法有多频振幅去耦和多频相位去耦，这些方法去耦的原理是基于激电效应和电磁耦合效应在频域内振幅和相位的差异，但去耦效果在电磁耦合感应强烈时并不理想。此次研究从激电效应的模型出发，采取指数函数拟合激电效应的方法，从时域内去除耦合感应，并通过计算去耦后的相位和相对相位与直接进行相对相位校正的结果进行对比，发现进行指数函数拟合后计算得到的相位受电磁感应的影响更小，去耦效果更佳。
전자우합감응시빈보격전법중일충흔강적간우인소，우기재저조구화대겁거측량시，영향료탐측심도화탐측효과。국내목전주요적거제전자우합적방법유다빈진폭거우화다빈상위거우，저사방법거우적원리시기우격전효응화전자우합효응재빈역내진폭화상위적차이，단거우효과재전자우합감응강렬시병불이상。차차연구종격전효응적모형출발，채취지수함수의합격전효응적방법，종시역내거제우합감응，병통과계산거우후적상위화상대상위여직접진행상대상위교정적결과진행대비，발현진행지수함수의합후계산득도적상위수전자감응적영향경소，거우효과경가。
The EM?coupling is one of the basic interference in the spectral?induced polarization, especially when the working area is covered with lower?resistivity layer or the current electrode spacing is large. It has great impact on the depth of the exploration and the effect of exploration. Recently, most methods to remove the EM?coupling are centered on the multi?frequency amplitude and the multi?frequency phase. These methods are based on the amplitude and the phase difference between the IP effect and the EM?coupling, which do not work well at strong EM?coupling. The authors'work is based on the IP model, and fits the IP effects with exponential function. Then the EM?coupling effects are removed from the time domain data. The phase and the relative phase after removing EM?coupling are confirmed more effectively based on the application in field data.