Multi-attribute seismic waveform classification

Details Multi-attribute seismic waveform classification Multi-attribute seismic waveform classification

G - Physics

01

V

G01V 1/28 (2006.01) G01V 1/30 (2006.01)

Patent

CA 2384312

A computer implemented method (Figs 2a, 2b and 3) for analyzing seismic data to discover areal trends of multi-attributes in a seismic data volume is disclosed. According to the disclosed method and apparatus the full waveforms of multiple traces (Fig. 4) are compared (34) in a zone that extends above and below an interpreted horizon (24), and the comparisons are made using a correlation algorithm that considers both shape and absolute amplitude of the waveforms being compared. Based on the multiple comparisons, traces are classified (40, 52) according to waveform shape such that maps of common waveform classes show areas of similar lithology and/or hydrocarbon effects.

La présente invention concerne un procédé informatisé (Figures 2a, 2b, 3) d'analyse des données sismiques (20) de façon à faire apparaître les tendances aréales de plusieurs attributs dans un volume de données sismiques. Le procédé mis en oeuvre par le dispositif consiste à comparer (34) plusieurs traces (Figure 4) des signaux complets dans une zone située au-dessus et en dessous d'un horizon interprété (24). Pour faire ces comparaisons, on utilise un algorithme de corrélation qui tient compte tant de la forme que de l'amplitude absolue des signaux soumis à comparaison. Sur la base de ces comparaisons, on classifie les traces (40, 52) en fonction de la forme des signaux de façon que la cartographie des classes communes de signaux fasse apparaître des zones lithologiquement semblables et/ou des effets imputables aux hydrocarbures.

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