WAVE-EQUATION EXTRAPOLATION-BASED MULTIPLE ATTENUATION - 2-D FILTERING IN THE F-K DOMAIN

Citation
Bz. Zhou et Sa. Greenhalgh, WAVE-EQUATION EXTRAPOLATION-BASED MULTIPLE ATTENUATION - 2-D FILTERING IN THE F-K DOMAIN, Geophysics, 59(9), 1994, pp. 1377-1391
Citations number
30
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
ISSN journal
00168033
Volume
59
Issue
9
Year of publication
1994
Pages
1377 - 1391
Database
ISI
SICI code
0016-8033(1994)59:9<1377:WEMA-2>2.0.ZU;2-Q
Abstract
A new nonlinear filter for wave-equation extrapolation-based multiple suppression is designed in the f-k domain. The realization of the new filter in the f-k domain is an extension of the conventional f-k dip f ilter. However, the new demultiple filter is superior to the conventio nal f-k dip filter in the sense that the multiple reject zones are det ermined automatically (based on the information of the input original data and the multiple model traces obtained by the wave-extrapolation method) rather than by prior information on multiple moveout (dip) ran ge. Therefore, it can easily cope with situations such as aliasing and the mixture of energy from multiples and primaries in the same quadra nt. The new filter is smooth on the boundary of the reject area. Numer ical examples demonstrate that the new filter in equivalent to the con ventional f-k dip filter in multiple suppression for simple situations . However, when the multiples and primaries are mixed in the same quad rant and have only slight difference in dip, the new filter offers sig nificant advantages over the conventional technique.