Method for multiple suppression based on phase arrays

G - Physics – 01 – V

Patent

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G01V 1/38 (2006.01)

Patent

CA 2430479

An apparatus and method of suppressing seismic multiples (figure 1), used in the collection of marine seismic data (106) with the sources (104), and receivers (105), positioned in the aquatic marine seismic survey environment (102), and with the receiver positioned in the water and near the below surface (103), and sources with a bubble diffuser (101), positioned so that the bubbles emitted by the diffuser are positioned between the receivers and the air-water surface, and wherein the emitted bubbles provide high acoustic reflection and suppress specular reflection of seismic waves by using a bubble control (106), to activate the diffuser during the collection of seismic data during the survey.

La présente invention concerne un appareil et un procédé de suppression des composantes sismiques (figure1) utilisées dans la collecte de données sismiques marines (106) à l'aide, d'une part, des sources (104) et des récepteurs (105), placés dans l'environnement aquatique marin d'étude sismique (102) et, d'autre part, du récepteur positionné dans l'eau à proximité de la surface (103), et, enfin, des sources pourvues d'un diffuseur de bulles (101) disposé de manière à ce que les bulles émises se situent entre les récepteurs et la surface de l'eau et de l'air. Ainsi, les bulles émises produisent une réflexion acoustique élevée et suppriment la réflexion spéculaire des ondes sismiques au moyen d'une régulation des bulles (106), afin d'activer le diffuseur durant la collecte de données sismiques au cours de l'étude.

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