Travel-Time Inversion in Shell - Towards High-Resolution Geologically Plausible Velocity Models

Over the years, travel-time inversion (TTI) has established itself within Shell as the preferred method to construct 3-D velocity models in depth for subsequent imaging purposes. Vast experience has been built up with layer based TTI and more recently its use in gridded or hybrid models has taken off. TT1 in gridded and hybrid models has been developed for geologies for which a layer-based description is less appropriate. In this presentation we present a number of case studies demonstrating the value of TII.