Correction method for processing seismic traces

G - Physics – 01 – V

Patent

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G01V 1/36 (2006.01)

Patent

CA 2590859

The invention relates to a method for processing seismic data comprising a collection of seismic traces with different offsets, comprising the steps of: a) breaking up one or several first trace(s) of the collection of seismic traces into a series of trace segments according to a predetermined segmentation interval; b) defining a series of expansion coefficients, each expansion coefficient being associated with a segment of the first trace or traces; c) applying the associated expansion coefficient to each segment of the first trace or traces; d) comparing the first trace or traces thus expanded with a second trace from the collection of seismic traces to evaluate their similarity; e) repeating steps b), c) and d) with a new series of expansion coefficients, f) determining an optimum series of expansion coefficients that maximizes the similarity between the first expanded trace and the second trace in order to obtain one or several corrected first trace(s).

L'invention porte sur un procédé de traitement de données sismiques comprenant une collecte de traces sismiques avec différents écarts. Ce procédé consiste à: a) fractionner une ou plusieurs premières traces de la collecte de traces sismiques en une série de segments conformément à un intervalle de segmentation prédéterminé; b) définir une série de coefficients de dilatation, chaque coefficient de dilatation étant associé à un segment de la première ou des premières traces; c) appliquer à chaque segment de la première ou des premières traces le coefficient de dilatation associé; d) comparer la première ou les premières traces ainsi dilatées avec une seconde trace de la collecte de traces sismiques afin d'évaluer leur similarité; e) répéter les étapes b), c) et d) avec une nouvelle série de coefficients de dilatation; f) déterminer une série optimum de coefficients de dilatation qui maximise la similarité entre la première trace dilatée et la seconde trace de façon à obtenir une ou plusieurs premières traces de corrigées.

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