A 2D slice of a real dataset from the Gulf of Mexico

In this 2D slice, there are 1600 shots, and the maximum offset is 4000 meters. I run plane-wave migration, using the wavefield-extrapolation operator suggested by Shan and Biondi (2005). I generate 80 plane-wave sources, for which the take-off angles at the surface range from $-40^\circ$ to $40^\circ$. Figure is the image obtained by anisotropic plane-wave migration in Cartesian coordinates, and Figure is the image obtained by anisotropic plane-wave migration in tilted coordinates. Figure images the salt flank much better than Figure , and we can see a lot of small, steeply dipping events inside the shallow sediments that are quite continuous right to the edge of the salt.