Depth Consistent PP and PS Seismic Angle Tomography

E015 DEPTH CONSISTENT PP AND PS SEISMIC ANGLE TOMOGRAPHY S.-K. FOSS 1 B. URSIN 2 M.V. DE HOOP 3 AND A. SOLLID 4 Abstract 1 PP and PS depth migration should map key geological horizons to the same depths. These depths should also coincide with the depth points estimated from well logs if such are available. The depth migrated images depend on the elastic parameters defining a background model. These are estimated by minimizing a differential semblance function which requires amplitude-corrected angle-domain common-image gathers to be uniform. That is the migrated events have the same amplitude and depth for each