M–037 3D TOMOGRAPHIC VELOCITY MODEL DETERMINATION FOR TWO NORTH SEA CASE STUDIES A. EHINGER * K. BROTO A. JARDIN and the KIMASI project team Institut Français du Pétrole 1 et 4 avenue de Bois Préau 92852 Rueil-Malmaison cedex France Summary Traveltime tomography properly implemented can be a powerful tool for subsurface velocity model determination. A blocky model representation with smooth constituting elements coupled with a dedicated two point ray tracing and a formulation of the tomographic inverse problem that allows the introduction of a priori information have been used in the software employed for two North Sea case studies. Traveltimes


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