SEPARATION OF SCATTERING AND DIFFRACTION FROM REGULAR REFLECTIONS IN SEISMIC DATA
V.A. Cheverda, S.V. Gol'din, V.I. Kostin, and D.A. Neklyudov
Institute of Geophysics, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
Keywords: Scatterer, diffractor, regular reflector, Gaussian beam, wavefield continuation, selective image
Pages: 784-792
Abstract
Weak point scatterers and diffractors in a vicinity of regular strong reflectors are separated by backward wavefield continuation along Gaussian beams, or solutions concentrated around a specific ray. Gaussian beams are used to construct the so-called selective images which highlight the elements that return incident wave energy at certain angles.
The approach has been tested in terms of resolution and sensitivity to errors in a medium with a user-specified velocity structure. The reported results of numerical experiments demonstrate the selectivity of the method as to dip angle and curvature of regular reflectors neighbored by point scatterers.
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