In 1995 CGG shot a 211 square mile 3D land survey in Wayne County, Mississippi. The exploration targets are smackovers with three-way closure between carbonates and salt flanks. Imaging the steep salt ridges required post-stack depth migration, and Figure 1 shows the resulting final 3D model. The velocity model is constrained by extensive well control. The acquisition geometry is a standard brick pattern with 10 lines live and a zipper in the middle of the survey.
Elevation is taken into account.
Although we had access to all source and receiver coordinates, some relational information was missing. Theoretical fold associated with the survey geometry. Except for a small fault in the western part of the survey, this horizon is mostly flat. Thus, the fold is not too different from Figure 3. Since the Selma is fairly flat, the coverage is similar to the theoretical fold map in Figure 3.