Stolt residual migration for converted waves

Daniel Rosales, Paul Sava, and Biondo Biondi

daniel@sep.stanford.edu, paul@sep.stanford.edu, biondo@sep.stanford.edu

ABSTRACT

PS velocity analysis is a new frontier in converted-waves seismic imaging. To obtain one consistent image, it is necessary to estimate correctly both the P-waves velocity model and the S-waves velocity model. Stolt residual migration is a useful technique for image update and velocity analysis. This paper extends Stolt prestack residual migration in order to handle two different velocity fields. The operator that we introduce is promising for PS velocity analysis. We present a theoretical discussion of our new operator, and discuss its ability to focus PS images.