|Post-stack velocity analysis by separation and imaging of seismic diffractions|
We have developed a method of efficient migration velocity analysis based on separation and imaging of seismic diffractions. The efficiency follows from the fact that the proposed analysis is applied in the post-stack domain as opposed to the conventional prestack velocity analysis. We used continuity of dominant reflections in the zero-offset or stacked sections as a criterion for separating reflections from diffractions. We then imaged separated diffractions using local focusing analysis for picking optimal migration velocities. A prestack extension of our approach was presented by Taner et al. (2006).