Method for locating hydrocarbon reservoirs

G - Physics – 01 – V

Patent

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G01V 1/30 (2006.01) G01V 1/34 (2006.01)

Patent

CA 2119951

A method is provided by which the presence, if any, and location of a hydrocarbon reservoir or reservoirs adjacent to a subterranean surface can be determined based on DAD values which correspond to grid points of the surface. DAD values, specifically defined herein, relate to the change in seismic amplitude (Delta Amplitude) as divided by the Dip magnitude at each grid point. According to a preferred embodiment, colors are assigned to grid points based on the sign of the DAD values, and such assigned colors are plotted onto a depth/time contour map of the subterranean surface to result in a display which clearly indicates the location of any hydrocarbons.

Présentation d'une méthode au moyen de laquelle la présence, le cas échéant, et l'emplacement d'un gisement d'hydrocarbures ou de gisements adjacents à une surface souterraine peuvent être établis compte tenu de valeurs DAD qui correspondent à des points de quadrillage de la surface. Les valeurs DAD, définies de manière précise dans la présente, ont trait au changement dans l'amplitude sismique (Amplitude Delta) divisé par l'importance du pendage (Dip) à chaque point du quadrillage. Dans une application privilégiée, des couleurs sont attribuées à des points du quadrillage compte tenu du signe des valeurs DAD, et ces couleurs sont reportées sur une carte en courbes profondeur/durée de la surface souterraine pour produire un affichage qui indique clairement l'emplacement des hydrocarbures.

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