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Suppression of Multiple Reflections: a New TechniqueNormal access

Authors: A.V. Masjukov, V.I. Shlyonkin, T.V. Akimov and G.V. Tararin
Journal name: Seismic Technology
Issue: Vol 11, No 1, January 2014 pp. 1 - 5
DOI: 10.3997/2405-7495.2015070
Language: English
Info: Article, PDF ( 143.83Kb )
Price: € 30

Summary:
Multiple suppression by the parabolic Radon transform is widely used in seismic processing. If the primary and multiple reflections have different moveouts, they will appear in different regions of the transform domain. The known approach represents a derivation of a linear nonadoptive 2D filter that performs flattening and regularization of NMO corrected gathers. In cases of low signal-to-noise ratio such a method works poorly, converting noise to horizontal events. We suggest a robust non-linear adoptive moveout- based multiple suppression. In contrast to the Radon transform methods, the subtracted wavefield consists of coherent multiple events found by an artificial intelligence. The proposed method has low computational cost, the irregular offsets are not impeding. Synthetic and real-data examples have verified the advantages of the developed AI technique.


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