Transient electromagnetic data differential conductance explanation method

The present invention provides a transient electromagnetic data differential conductance explanation method, belonging to a geophysical exploration data explanation method. The differential conductance explanation method is an explanation method of different attenuation characteristics of an induced electromotive force at areas with different resistivities based on a transient electromagnetic prospecting method. The method provided by the invention comprises: S1, designing different stratum models according to the electrical property difference, performing forward modeling of each stratum model, and gathering obtained data; and S2, explaining obtained transient electromagnetic data through adoption of a differential conductance method, and observing the fluctuation condition of the curve of transient electromagnetic differential conductance values changed with the time is observed. The transient electromagnetic data differential conductance explanation method is used for stratum layering and water-containing