在水平层状介质条件下,如果把地层划分为电磁波或弹性波在其中的双程旅行时都相等的“微层”,则大地电磁场和弹性波的位移场的反射函数无论是在表现形式上,或是在物理意义上都是十分相似的。这样的话,大地电磁测深法也可以象地震反射法一样画出“时间剖面”进行地质解释。这种方法还可推广到二维大地电磁测深和电测深资料的解释。通过对二层、三层和四层断面的理论模型试算,说明此方法是可行的。但是,无论是在理论上,还是在实践中都有许多值得研究的问题,例如在MT中反射函数的精度受观测精度及计算方法的影响。因此,研究新的观测方法和计算方法就显得很有必要。再如怎样把地震资料处理中一些消除干扰和提高分辨率的措施用于MT法。

The reflection function of magnetotelluric field is quite similar to that of elastic wave field in both the form and physical meaning on condition that the horizontal layered medium is transformed into Goupillaud medium in which the electric-magnetic wave or the elastic wave passes perpendicularly through each layer in equal travel time.Then,the magnetotelluric sounding time section, which is similar to seismic time section, can also be made and interpreted geologically,This method can also be used to interpret the data of 2D magnetotellurk sounding and electric sounding,The computations of the theoretical section models which consist of two layers,three layers and four layers respectively prove this method practical.However,some theoretical and practical problems,such as the problem of how the MT reflection function accuracy is influenced by observation accuracy and computation method,must be further approached.It is therefore necessary to find out new observation and computation methods.It is also necessary to study howto apply some seismic data processing measures for eliminating noise and improving resolution to magnetotelluric data.