Seismic and geometrical attributes from image gathers

We examine migrated angle domain gathers to extract seismic and geometrical attributes of reflectors. We illustrate the procedure on a real 2D dataset: the angle domains we refer to are the illumination dip angle and the aperture scattering angle. We use the illumination dip angle gather to track the main reflectors and to create a map of the dip values. This information and the scattering aperture angle gather enables to improve AVA analysis and to build maps of seismic attributes. The procedure is automatic.