Sub-salt reflection tomography and imaging by walkaway vsp...

Details Sub-salt reflection tomography and imaging by walkaway vsp... Sub-salt reflection tomography and imaging by walkaway vsp...

G - Physics

01

V

G01V 1/42 (2006.01)

Patent

CA 2651209

A walkaway VSP survey is carried out with receivers (Ilia - llld) located in a borehole (101) near the base salt (105). Reflection tomographic inversion of data from the walkaway VSP (125a - 125c) is used to derive a velocity model for the subsurface and may be used for imaging of sub-salt reflections.

Selon l'invention, un profil sismique vertical (VSP) à déports croissants est réalisé à l'aide de récepteurs placés dans un trou de forage à proximité d'une couche de sel. Une inversion tomographique de réflexions appliquée aux données issues du VSP à déports croissants est utilisée pour déduire un modèle de vitesse en profondeur et peut être utilisée pour l'imagerie de réflexions sous le niveau du sel.

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