NMO-Stacking process

In the last step, the data are NMO corrected and stacked. The stacking velocity comes from Lumley et al. (1995). Figure 9 shows the stack of the input data without multiple attenuation. Figures 10, 12, 14 show the stacks of the multiple-free data with the different methods. Figures 11, 13, 15 show the difference between the stacked section of the input data with multiples and the stacked section of the data without multiples for the three inversion schemes. We see that the multiple suppression has cleaned up deeper parts of the structure (below 2s.). Furthermore, there are no noticeable differences between the three methods in the stacked sections. In addition, as is often the case, the stacking is such a powerful multiple-suppression method that it attenuates multiples sufficiently well: the simple stack of the input data with multiples looks fairly close to the stacked section without multiples (see Figure 9).