f Numerical analysis of parameter sensitivity in 3D TTI tomography

We investigate the resolution of anisotropic model parameters in ray-based TTI reflection tomography. Our approach is to perform numerical experiments using 3D acoustic TTI finitedifference model data. In the first part of this presentation, we introduce a 3D TTI model that is used for this study. The size of this model is x=20 km, y=17.5 km and z=10 km. Some of the important features of the model are steeply dipping layers (dips up to 70 degrees) exhibiting relatively strong anisotropy with structurally conformable orientation of the anisotropic symmetry axis. The model also contains salt bodies that allow us to investigate the effects of TTI anisotropy in overburden sediments on the imaging of subsalt events.