In the first step,through using the formula of the conformal transformation,a continuous medium with regulation boundary in original area could be transformed to a homogeneous medium with anomalous boundary in complex area,so the new constant velocity field could be more adapt to the current Stolt migration's conditions.

An analysis was conducted on the structures of these two elements based on equivalent homogeneous medium theory,obtaining the electromagnetic characteristic parameters of these two structures in the case of negative refractive index,including relative wave impedance,refractive index,relative permittivity and relative permeability.

The data processing is base on assuming that the prospecting field is homogeneous medium,and it use High-distinguished direct current method.

A simple method for measuring refractive index of uniform medium has been reported.

Calculation of electric field response in the heterogeneous medium using the transmission line method;

Using the pseudo-spectral method for wave field numerical modeling of complex heterogeneous medium;

Under a rotational symmetry distribution geometrical condition of 2 heterogeneous mediums where only invasion zone and original formation are considered,the investigation depth in this paper is defined as the invasion radius where the relative contribution rate of the invasion zone and the original formation to the measured apparent resistivity response is 50% each.