Diffraction separation based on perturbed CRS attributes
Jorge Henrique Faccipieri Junior, Leiv Jacob Gelius, Martin Tygel · 2013
The imaging of diffracted waves can provide information related to finer geological structures, such as faults and pinch-outs, which reflected waves are not able to provide. Since these waves are weaker than reflections, an approach that enhances and separates diffractions is necessary. In this work, we propose a method to separate diffractions in zero-offset sections using a modified version of the Common Reflection Surface (CRS) method. The CRS operator admits a particular case where the diffractions are stacked coherently, which often leads to a partial separation of events. In order to improve the separation quality, we propose a perturbation factor to be applied to one of the CRS attributes. The application of the proposed method on a 2D real dataset showed good results with a clear separation of events.