A synthetic dataset

Figures - show a synthetic model for VTI media. Figure is the velocity model, Figure is the map of the anisotropy parameter $\varepsilon$, and Figure is the map of the anisotropy parameter $\delta$. There are 720 shots in total and the maximum offset for each shot is 8000 meters. The challenging part of this model is to accurately image the steep fault, salt flank and the two abnormal sediments near the right corner of the salt body. I run a plane-wave migration, using the optimized implicit finite-difference operator as the extrapolator. I generate 70 plane-wave sources, for which the take-off angles at the surface range from $-40^\circ$ to $40^\circ$. Figure shows the image. Notice that the steeply dipping salt flank and the fault are well imaged. The steepest part of the salt flank is about $60^\circ$.The abnormal sediments also are well imaged.

 

vpani
Figure 4 Vertical velocity model.

 

epsani
Figure 5 Anisotropy parameter $\varepsilon$.

 

dltani
Figure 6 Anisotropy parameter $\delta$.

 

imfdhess
Figure 7 Implicit finite-difference migration.