Wide angle screen method applied to pre-stack migration of a 2D syn thetic salt-like model

The wide-angle screen propagator can be used for fast and accurate depth migration. In this study, we applied the method to the prestack depth migration of a complex 2D model. The model shows a number of challenging features to migration algorithms, e.g., strong velocity contrast and steep structures. Our results show that the wide angle algorithm gives good results in a complex model. We also studied the image from selected re ectors and artifacts using a shot versus position method. It reveals that the noise is mostly generated by the spreading of wave energy in the complex upper part of the salt body. We also suggest that the acquisition geometry share the responsability for imaging quality. The small aperture of shot-receiver combination prevented the wave traveling through the right part of the model to compensate that traveling through the salt.