Abstract

In this work, we have performed model building and 3D PreSDM on P-wave data from a 3D OBC survey using offset vector tile (OVT) processing, wherein the velocity is estimated by a surface fitting non- sectored approach, characterising velocity in terms of a fast and slow direction, along with the azimuth of the fast axis. Using OVT VTI tomographic inversion permits us to thereby better resolve localized heterogeneity that is usually left unresolved when using a conventional non -OVT tomographic approach.