Analysis of Effectiveness of Refraction Static Methods on Field Data

Static corrections are a way of replacing all shots and receivers onto one final datum and removing near surface layer. Three methods of refraction static corrections have been compared: DRM (Diminishing Residual Matrices), GRM(General Reciprocal Method), DTM(Delay Time Method). The key factor of comparison was continuity of reflections after static corrections. DTM method appeared to be the best one. Next step is to execute GLI (General Linear Inversion. Near surface layer consists of two layers. In the first one there is strong lateral variety of velocities. It can indicate that in this layer are sand dunes and better results would be gained with GLI.