Abstract: The vertical or horizontal lithologic variation of geologic body in surface and near surface is one of the key factors for static correction of different wave lengths. By using conventional static correction, it is difficult to develop the surface or near-surface velocitydepth model in seismic exploration of complex surface, causing inaccurate static correction value, due to big difference of such a depth vs. velocity resulted from limitation of numbers of up-hole shooting or weathering-refraction shooting point, along with lithologic changes between adjacent control points. By using transient electromagnetic method and by continuous survey, the electric seismic profile of the surface or near-surface texture in target area can be obtained, and the velocity-depth model can be developed by the relationship between the lithology and the electric feature. Furthermore, the accurate static correction value could be gained by arranging the up-hole shooting or weathering-refraction shooting points, getting relevant depth and velocity data and then developing relevant model. Such a surface geologic model-based geophysical velocity-depth model is of uniqueness for gaining the accurate static correction value.

Key words: transient electromagnetic method, static correction, surface texture, seismic prospecting, velosity