Azimuthal Velocity Residual Analysis Overview

Process name “Velresa”

Performs azimuthal and standard velocity residual corrections to pre-stack uncorrected CDP gathers. The output from this tool is a detailed (every trace and sample) VEL or VAZ velocity table. The velocity tables can then be used to apply NMO to the seismic data. In the case of the azimuthal velocities (VAZ), we can create azimuthal anisotropy computations like Ellipticity.

This tool is used to correct for vertical and horizontal velocity variations that are impossible to pick manually.