Method of seismic signal processing and exploration

Details Method of seismic signal processing and exploration Method of seismic signal processing and exploration

G - Physics

01

V

G01V 1/28 (2006.01) G01V 1/30 (2006.01) G01V 1/34 (2006.01) G01V 1/36 (2006.01) G11B 23/00 (2006.01)

Patent

CA 2179901

A method for the exploration of hydrocarbons, comprising the steps of: obtaining a set of seismic signal traces distributed over a pre-determined three-dimensional volume of the earth; dividing the three-dimensional volume into a plurality of vertically stacked and generally spaced apart horizontal slices; dividing each of the slices into a plurality of cells having portions of at least three seismic traces located therein; measuring the cross-correlation between one pair of traces lying in one vertical plane to obtain an in-line value and the cross-correlation between another pair of traces lying in another vertical plane to obtain a cross-line value; combining the in-line value and the cross-line value to obtain one coherency value for each of the cells; and displaying the coherency values.

L'invention porte sur un procédé d'exploration en matière d'hydrocarbures, comportant les étapes suivantes: acquisition d'un ensemble de traces sismiques sous forme de signaux réparties sur un volume terrestre préétabli en trois dimensions; division de ce volume tridimensionnel en plusieurs tranches horizontales empilées verticalement et généralement espacées; divison de chaque tranche en plusieurs cellules comportant des parties d'au moins trois traces sismiques se trouvant dans la tranche; mesure de la corrélation croisée entre une paire de traces situées sur un plan vertical afin d'obtenir une valeur en ligne et mesure de la corrélation croisée entre une autre paire de traces situées sur un autre plan vertical afin d'obtenir une valeur de ligne transversale; combinaison de la valeur en ligne et de la valeur de ligne transversale pour obtenir une valeur de cohérence pour chaque cellule, et, enfin, affichage des valeurs de cohérence.

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