Method of conducting a seismic survey

G - Physics – 01 – V

Patent

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G01V 1/02 (2006.01)

Patent

CA 2641509

A method of conducting a seismic survey of an area including a region of high seismic velocity regimes in a shallow overburden. According to the method, a zone is identified in which the boundary of the high seismic velocity region has a substantially constant critical angle and a course is plotted through the identified zone. A zone based directional seismic source is applied sequentially, with a directivity angle equal to or close to the measured critical angle. The response is detected using receivers.

L'invention concerne un procédé de réalisation d'un relevé sismique dans une zone comprenant une région qui présente des régimes de vitesse sismique élevée s'exerçant dans un mort-terrain peu profond. Selon le procédé de l'invention, une zone identifiée dans laquelle la limite de la région de vitesse sismique élevée présente un angle critique sensiblement constant, et un tracé est exécuté à travers la zone identifiée. Une source sismique directionnelle basée sur la zone est appliquée séquentiellement, avec un angle de directivité égal ou proche de l'angle critique mesuré. Le réponse est détectée à l'aide de récepteurs.

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