频率域电磁测深有两种途径:在固定位置上改变频率(频率测深)或在固定频率上(几何测得)改变发射-接收点距(T-R)。该频率变化或间距系数的改变影响了对比下导电率分布的垂直扫描范围。在薄导电情况下,可能存在一个能使地层参数分辨率达到最大的T-R间距或最佳频率范围。因此,对一个特定的地下目的层而言,应能找到聚焦效果最佳的频率范围或间 There are two ways of measuring electromagnetic fields in the frequency domain: changing the frequency at a fixed location (frequency sounding) or changing the transmit-receive pitch (T-R) at a fixed frequency (measured geometrically). This change in frequency or pitch factor affects the vertical sweep range of the conductivity distribution in contrast. In the case of thin conduction, there may be a T-R pitch or optimal frequency range that maximizes the resolution of the formation parameters. Therefore, for a particular subterranean target, one should be able to find the best-focused frequency range or between