Predicting rugged water-bottom multiples through wavefield extrapolation with rejection and injection |
Obviously, based on the above-mentioned idea, an auxiliary model presentation should be given. As shown in figure 2, in this auxiliary model presentation, the solid circle, rectangle and star represent the nodes of computation in water, in the subsurface, and on the water bottom, respectively.
fig1
Figure 1. A snapshot of seismic modeling to show the water bottom multiples and illustrate wavefield rejection and injection. [NR] |
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fig2
Figure 2. The auxiliary model presentation for wavefield extrapolation with wavefield rejection and injection. [NR] |
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fig3
Figure 3. Schematic illustration of the four types of wavefield extrapolations in terms of Kirchhoff integral: (a) downward wavefield extrapolation of the down-going wave; (b) downward wavefield extrapolation of the up-going wave; (c) upward wavefield extrapolation of the up-going wave; and (d) upward wavefield extrapolation of the down-going wave. [NR] |
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Predicting rugged water-bottom multiples through wavefield extrapolation with rejection and injection |