f Tomography and Depth Imaging

Building a depth velocity model for prestack depth migration is a time consuming and complicated task . To assist this talk we require as much a priori information as possible. Additionally we use the simplest methods which will address the problem of building the vetocity model for the current structure (Bloór et al. 1997, Stork et al. 1997). However, as structure becomes more complicated we have to resort to more complex methods to determine the vetocity model.