Estimation of static corrections from geologic and remote-sensing data

Statics fluctuations in surface seismic data result from variations in the near surface, and, therefore, it is important to understand the effect that topography and lithology have on the propagation of seismic waves in the near surface. The approach presented here introduces geomorphologic near-surface characterization from remote-sensing data and shows how topographic and lithologic classification allow the generation of a 3D near-surface geologic model. Using standardized elastic properties for the rock types identified in the classification step, the 3D geologic model can be converted into a 3D elastic model. Statics are estimated assuming vertical propagation of the seismic waves through the layers of the elastic model.