Conclusions

I have demonstrated with a simple synthetic dataset that water-bottom multiples from a dipping interface behave as primaries generated by a reflector with twice the dip at twice the perpendicular depth at the CMP location. Therefore they can be perfectly migrated if the migration is done with the water velocity. The diffracted multiples, on the other hand, cannot be perfectly migrated because they do not correspond to an equivalent primary. Understanding how the multiples behave after migration, specially in 3D, is very important for the ultimate goal of attenuating the multiples in image space.