High resolution 3D parabolic Radon filtering

Abstract

2D parabolic Radon filtering is a widely used method for multiple attenuation. However, for dense and wide‐azimuth gathers that have azimuthal anisotropy effects this approach can have problems. Because of the variation of the curvature of the events with azimuth, the bin gathers can not be processed in one go but must rather be split into sub‐collections where the azimuth either has little variation or varies smoothly. We instead propose herein to take into account the azimuthal anisotropy by incorporating an elliptical model for the variations of the curvature with azimuth, to define a 3D parabolic Radon filtering. This is a more natural way of processing dense wide‐azimuth gathers by honoring their actual 3D geometry.