Method for identifying subsurface features from marine...

G - Physics – 01 – V

Patent

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G01V 3/10 (2006.01)

Patent

CA 2594762

A method for identifying features in the Earth's subsurface below a body of water using transient controlled source electromagnetic measurements includes acquiring a plurality of transient controlled source electromagnetic measurements. Each measurement represents a different value of an acquisition parameter. Each measurement is indexed with respect to a time at which an electric measuring current source is switched. The plurality of measurements is processed in a seismic trace display format, in which each trace corresponds to the measurement acquired for a value of the acquisition parameter. A subsurface feature is identified from the processed measurements.

La présente invention a trait à un procédé pour l'identification de caractéristiques dans la couche inférieure terrestre au-dessous d'un plan d'eau à l'aide de mesures électromagnétiques de source contrôlée transitoire comprenant l'acquisition d'une pluralité de mesures électromagnétiques de source contrôlée transitoire. Chaque mesure représente une valeur différente d'un paramètre d'acquisition. Chaque mesure est indexée par rapport à un instant auquel une source de courant électrique de mesure est mise en marche. La pluralité de mesures est traitée dans un format d'affichage de traces sismiques, dans lequel chaque trace correspond à la mesure acquise pour une valeur du paramètre d'acquisition. Une caractéristique de fond est identifiée à partir des mesures traitées.

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