Method for locating and identifying site anomalies

Details Method for locating and identifying site anomalies Method for locating and identifying site anomalies

G - Physics

01

V

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

Patent

CA 2225511

This invention features a method for locating and identifying site anomalies. It is characterized by the steps of: - Using a given seismic block (1) consisting of seismic traces located by their space coordinates; - Demarcating in the said seismic block at least one time interval between a higher level (2) and a lower level (3); - Selecting a time-model (5) of one anomaly; - Correlating the said model (5) with each of the said traces (4) within the said time interval; - Calculating for each trace the maximum correlation (.GAMMA.M) and the corresponding time (t i) of the said maximum correlation; - Drawing a maxima correlation chart (7) equal to the spatial dimensions of the seismic block (1) and a chart (8) of the said times corresponding to the correlation maxima; the said time charg being of the same dimensions and located in the same system of coordinates (x, y) as the said maxima correlation chart.

Procédé de localisation et d'identification des anomalies d'un milieu. Il est caractérisé en ce qu'il consiste à: utiliser un bloc sismique donné (1) composé de traces sismiques repérées par leurs coordonnées spatiales; délimiter dans ledit bloc sismique au moins un intervalle temporel entre un niveau supérieur (2) et un niveau inférieur (3); sélectionner un modèle temporel (5) d'une anomalie; corréler ledit modèle (5) avec chacune desdites traces (4) comprises dans ledit intervalle temporel; déterminer, pour chaque trace, la corrélation maximum ( GAMMA M) et le temps (ti) correspondant de ladite corrélation maximum; réaliser une carte (7) des corrélations maximales égale aux dimensions spatiales du bloc sismique (1) et une carte (8) desdits temps correspondant aux maxima de corrélation; ladite carte des temps étant de mêmes dimensions et repérée dans le même système d'axes (x, y) que ladite carte des maxima de corrélation.

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