A method for modeling an arbitrary well path in a...

G - Physics – 01 – V

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G01V 11/00 (2006.01) G06T 17/05 (2011.01) G06T 17/20 (2006.01)

Patent

CA 2415257

Methods and systems for adapting an unstructured mesh to a modeled space. In one embodiment, a surface is defined in the modeled space, intersections of the surface with the elements of the mesh are determined, and new elements within the intersected elements are defined such that one or more of the faces of the new elements are substantially coincident with the surface. For each element which is intersected by the surface, a plurality of points at which the edges of the element are intersected is determined. For each point of intersection, a new node is located at that point and two new elements which incorporate the new node are created. This process is performed for each of the points of intersection so that the intersected element is subdivided into an new elements which include faces that lie substantially on the moduled surface.

Cette invention se rapporte à des procédés et à des systèmes permettant d'adapter un maillage non structuré à un espace modélisé. Dans un mode de réalisation, une surface est définie dans l'espace modélisé, des intersections de cette surface avec les éléments du maillage sont déterminées, et de nouveaux éléments parmi les éléments entrecoupés sont définis pour que l'une ou plusieurs des faces de ces nouveaux éléments coïncident essentiellement avec ladite surface. Pour chaque surface qui est intersectée par ladite surface, on détermine plusieurs points au niveau desquels les bords desdits éléments sont intersectés. Pour chaque point d'intersection, un nouveau noeud est localisé en ce point et deux nouveaux éléments qui incorporent ce nouveau noeud sont créés. Ce procédé est effectué pour chacun des points d'intersections, pour que l'élément intersecté soit subdivisé en un nouvel élément qui contient les faces situées essentiellement sur la surface modélisée.

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