3D Azimuthal Tomography on OBC Data

E-12 3D AZIMUTHAL TOMOGRAPHY ON OBC DATA Abstract 1 This paper proposes an original approach for quantifying the anisotropy that may occur in a fractured carbonates reservoir. Wide azimuthal seismic datasets often exhibit an azimuthal dependency on the normal moveout and the AVO gradient measurements (Rüger 1996 Lynn et al 1996 Lefeuvre 1994). The success of the methodology for determining azimuthal interval velocity variations is here based on a robust seismic processing on a robust automatic picking of azimuth/offset events and on an adequate depth tomography (P. Sexton 1998). The acquisition of the considered Ocean Bottom Cable (OBC) 3D seismic