Multiple elimination is one of the important topics in the field of seismic data processing. Since the water bottom multiples usually interfere with the primary reflections and induce overmigration during the migration stage, we propose one simple and easy method to extract the first order water bottom multiple. This method is an extended application of the time space (T-X) domain dip filter combined with the residual migration. In the area with rugged water bottom, this method is more effective, than conventional multiple suppression methods, for the suppression of multiples.

It erases the water bottom multiples from the record, but also any undesired energy. Since this mehod is applied in the post-stack stage and the recognization of the multiple is subjective, so the application of this method should be made very carefully. When parameters are properly chosen, the application of this method can make an noticeable improvement in the final results.