Method for enhancing seismic data

G - Physics – 01 – V

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G01V 1/38 (2006.01) G01V 1/28 (2006.01) G01V 1/36 (2006.01)

Patent

CA 2325874

A method for enhancing seismic data traces (10) so that subtle geologic features are easier to identify and interpret. In a first embodiment, the method comprises enhancing the amplitudes of at least the peaks (12a-12d) and troughs (14a-14d) in the seismic data traces (10). This enhancement can be accomplished in a variety of ways. In a second embodiment, the negative second difference (18) is calculated at each sample point along the seismic data trace (16) to enhance bends or kinks in the data, as well as peaks and troughs. The method may be used to enhance any type of seismic data trace, included but not limited to minimum-phase seismic data traces, zero-phase seismic data traces, quadrature traces, and zero-phase quadrature traces.

Procédé permettant d'améliorer les traces (10) de données sismiques, de façon à faciliter l'identification et l'interprétation des caractéristiques géologiques subtiles. Dans un premier mode de réalisation, le procédé consiste à accentuer l'amplitude au moins des sommets (12a-12d) et des creux (14a-14d) des traces sismiques (10). Cette accentuation peut se faire de diverses manières. Dans un second mode de réalisation, la dérivée seconde négative (18) est calculée au niveau de chaque point échantillon de la trace sismique (16), de façon à accentuer les inflexions et les écarts des données, ainsi que les sommets et les creux. Ce procédé peut être utilisé pour améliorer tous les types de traces de données sismiques, notamment mais non exclusivement les traces à déphasage minimal, les traces à déphasage nul, les traces en quadrature et les traces en quadrature à déphasage nul.

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