关于频率电磁测深几个问题的探讨(四)——对频率电磁测深静态效应问题的再探讨

频率电磁测深属电磁法，同样存在静态效应问题。在前人研究的基础上，根据静态效应的概念与特征，提出用电磁场边界条件直接阐明其产生机理与表现特征，由此可以更好地解释视电阻率在双对数坐标上沿其坐标轴平移的方向与幅度。又根据视电阻率曲线在双对数坐标的平移性，指出利用与斜率不变性相关的方法做静态效应校正是有效的，例如相位法。最后补充说明了几个概念问题，以期更好地理解静态效应问题。 

Discussion on the static effect problem of frequency electromagnetic sounding

Frequency electromagnetic sounding is an electromagnetic method, there exists the problem of static effect. The paper, on the basis of previous studies, according to the concept and the characteristics of static effect, put forward that the boundary conditions of electromagnetic fields is used to directly describe its generating mechanism and characteristics, which can better explain the translational direction and amplitude of apparent resistivity in double logarithmic coordinates along the coordinate axis. According to the apparent resistivity curve translation in double logarithmic coordinates, it is pointed out that using related methods with slope invariance to correct static effect is effective, for example phase method. Finally, in order to better understand the static effect, some conceptual issues are illustrated.