摘要
开展含电磁耦合的频谱激电响应特征对实际勘探中的电磁耦合干扰的识别和去除具有实用价值。本文从频谱激电的实际应用出发,推导基于cole-cole模型的水平层状介质接导线AB发射和MN接收的复阻抗计算公式,然后利用快速汉克尔变换进行计算实现含电磁耦合的频谱激电一维正演。通过含对不同频谱激电参数下半空间的纯cole-cole模型和含电磁耦合效应模型的响应特征进行对比分析,结果表明:视电阻率在频率小于10Hz时基本无电磁耦合效应影响,相位在频率小于1Hz时无电磁耦合效应影响,1Hz-105Hz先下降后上升在1000Hz出现极小值。因此在实际应用中应选用10Hz以下频段进行勘探。
It has practical value to carry out electromagnetic spectrum identification with IP response characteristics of practical exploration in the electromagnetic coupling interference and removal. This article begins from the practical application of spectral IP, derivation of Cole-Cole model of horizontal layered medium wire AB transmit and MN receive impedance calculation formula based on, and then calculated to achieve spectral IP one-dimensional electromagnetic coupling forward using Fast Hankel transform. Comparative analysis of the response characteristics, with pure Cole-Cole model of the half space under different spectral IP parameters with electromagnetic coupling effect model shows that: the apparent resistivity in frequency is less than 10Hz without electromagnetic coupling effect, the phase in the frequency of less than 1Hz without electromagnetic coupling effect, 1Hz-105Hz first decreased and then increased appear the minimum value in 1000Hz. In practical application, so should choose 10Hz band below exploration.
出处
《科技信息》
2014年第13期70-71,50,共3页
Science & Technology Information
