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The main problem in the attenuation of multiples is with narrow-azimuth towed-streamer 3D data.
In this chapter I extend the basic equations for the residual moveout of specular
multiples in ADCIGs for 3D data. I show that the mapping of the multiples is similar
to the 2D case, except that the crossline dip generates an azimuth dependency
that is different for primaries and multiples. I use a simple 3D synthetic
prestack dataset with two primary reflections and two specular multiples to illustrate the
mapping of the multiples to 3D ADCIGs. Since the 3D ADCIGs are function of both aperture angle and
reflection azimuth, their interpretation is not trivial. I describe in some detail the
information contained in the 3D ADCIGs and show how the multiples and the primaries have
very different residual moveout. This chapter lays the foundation for the application of
the method to the real 3D dataset of Chapters and .

** Next:** Chapter 5: Imaging and
**Up:** Thesis Overview
** Previous:** Chapter 3: Simultaneous matching
* *

2007-10-24