A real dataset: ExxonMobil MC311

Figures and show the map of two anisotropy parameters, $\varepsilon$ and $\delta$, for a 2D slice of the real dataset MC311. Notice the strong anisotropic layers around the salt body. Figure shows the image obtained by plane-wave migration, using the optimized implicit finite-difference operator as the extrapolator. The steeply dipping sediments around the salt below the anisotropic layers are well imaged. Figure shows the image obtained by plane-wave migration, using an implicit isotropic operator plus a 5 point explicit anistropic correction filter Shan and Biondi (2005) as the extrapolator. The two images are comparable, while the implicit finite-difference method is much cheaper.