Method for seismic imaging in geologically complex formations

Details Method for seismic imaging in geologically complex formations Method for seismic imaging in geologically complex formations

G - Physics

01

V

G01V 1/00 (2006.01)

Patent

CA 2546429

A method for multipath imaging of three-dimensional volumes of seismic data, given the subsurface velocity distribution. Ray tracing is used to generate the volumes of information needed for migration, but using coarse-scaled grids for computational efficiency. Interpolation methods are disclosed that address the specific shot points and receiver locations and that enable a final image on a grid with the desired resolution. Data storage and retrieval techniques are also disclosed.

Cette invention concerne un procédé d'imagerie multi-voie de volumes tridimensionnels de données sismiques qui est fonction de la répartition des vitesses superficielles. On utilise un lancer de rayons pour générer les volumes d'informations requis pour la migration, mais avec des grilles d'échelle grossières pour des raisons d'efficacité de calcul. L'invention concerne des procédés d'interpolation pour des points de tir et des emplacements récepteurs qui permettent d'obtenir sur une grille une image finale présentant la résolution requise. Sont également décrites des techniques de stockage et d'extraction de données.

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