Amplitude Behavior of Kirchhoff, Wavefield Extrapolation, and Beam Migration in Areas of Poor Illumination

G025 Amplitude behavior of Kirchhoff wavefield extrapolation and beam migration in areas of poor illumination Abstract 1 UWE ALBERTIN CHRISTOF STORK DAVID YINGST WENFONG CHANG ROBIN FLETCHER AND PHIL KITCHENSIDE Western Geco 10001 Richmond Avenue Houston TX 77042 A summary of amplitude treatments of Kirchhoff shot-profile wavefield extrapolation and ray-based beam migrations is given with particular emphasis on their behavior in areas of poor illumination. This leads to a short discussion of the phenomenon of Beylkin aliasing which results in ‘smiling’ artifacts often seen in areas of poor illumination in Kirchhoff migration and how these artifacts are avoided in wavefield