A system and method for efficient well placement optimization

G - Physics – 01 – V

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G01V 1/28 (2006.01) G01V 11/00 (2006.01)

Patent

CA 2715942

The disclosed methods, systems, and software are described for optimizing well placement in a reservoir field. A geological model of a reservoir field, a grid defining a plurality of cells, one or more wells to be located within the plurality of cells, and an objective function are all provided. The geological model is associated with the grid defining the plurality of cells. The locations of the wells are represented by continuous well location variables associated with a continuous spatial domain, A gradient of the objective function is calculated responsive to the continuous well location valuables. The locations of the wells are then adjusted responsive to the calculated gradient of the objective function. Iterative calculation of the gradient and adjustment of the wells continue until the well locations are optimized. A visual representation of the reservoir field can be generated based on the optimized well placements.

L'invention concerne des procédés, des systèmes et des logiciels destinés à optimiser le positionnement de puits sur un champ de gisement. On dispose dun modèle géologique dun champ de gisement, dun maillage définissant une pluralité de cellules, dun ou de plusieurs puits à positionner au sein de la pluralité de cellules et dune fonction objective. Le modèle géologique est associé au maillage définissant la pluralité de cellules. Les emplacements des puits sont représentés par des variables continues de positionnement des puits associées à un domaine spatial continu. Un gradient de la fonction objective est calculé en fonction des valeurs des variables continues de positionnement des puits. Les emplacements des puits sont alors ajustés en fonction du gradient calculé de la fonction objective. Le calcul du gradient et lajustement des emplacements des puits se poursuivent de façon itérative jusquà ce que les emplacements des puits soient optimisés. Une représentation visuelle du champ de gisement peut être générée sur la base des emplacements optimisés des puits.

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