Depth Imaging in a Carbonate and Salt Environment Using Grid-Based Tomography

C003 Depth imaging in a carbonate and salt environment using grid-based tomography Abstract 1 MICHAEL O’BRIAIN UWE ALBERTIN MARTA WOODWARD AND S. JERRY KAPOOR Western Geco 10001 Richmond Avenue Houston TX 77042 We present an optimized depth-imaging processing flow for the recovery of thin-layer carbonate velocities in the Alaminos Canyon area GOM. Geology in this area consists of highly folded sediment and carbonate layering in close proximity to salt. The processing flow consists of multiple iterations of Kirchhoff depth migration as well as horizon-constrained and unconstrained grid tomography. Examples are given that illustrate how this flow resulted in a convergent