Prestack migration of converted wave data requires accurate acoustic and shear velocities Vp and Vs. New methods to estimate the shear velocities using a single converted wave velocity Vc are shown in this paper.
The estimated shear velocity Vs is used with Vp in a full prestack migration using the equivalent offset method to form complete prestack migration gathers. This process is referred as converted wave equivalent offset migration (C-EOM). The quality of the method is demonstrated with a one real dataset.
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