Stolt prestack residual migration for converted waves

PS velocity analysis is an important aspect of converted wave seis-mic imaging. To obtain one consistent image, it is necessary to correctly derive both the P-wave and the S-wave velocity models. Stolt prestack residual migration is a useful technique for veloc-ity analysis and image update. This paper extends Stolt prestack residual migration to handle two different velocity fields. The new operator that we introduce is promising for PS velocity analysis. We present a theoretical discussion of our new operator and dis-cuss its ability to focus PS images. Finally, we present prestack residual migration results on a synthetic and a real dataset