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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.

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Stanford Exploration Project

5/3/2005