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Multiples can be suppressed in the angle-domain, after migration.
For a given velocity model, primaries and multiples have different
moveout in the image space, and therefore they can be separated using
similar techniques as the ones employed in the data space, prior to
migration. We use Radon transforms, although these methods
are neither unique, nor ideal.
Because we are using prestack depth migration,
this method takes into account the effects of complex wavefield propagation
in the same way that the Delft approach does. However, our proposed
scheme has the potential to be affordable with 3-D data.
Therefore, for complex geology, this method stands between
multiple attenuation in the data space with Radon transforms and the
Delft approach where multiples are first predicted and then subtracted.

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Stanford Exploration Project

7/8/2003