Method, system and apparatus for real-time reservoir model...

G - Physics – 06 – G

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G06G 7/48 (2006.01)

Patent

CA 2630384

A method, system and apparatus for real-time reservoir model updating using ensemble Kalman filters is described. The method includes a conforming step for bring bringing static and dynamic state variables into conformance with one another during a time step of the updating. Also, an iterative damping method is used in conjunction with the conformance step to account for nonGaussian and nonlinear features in a system. Also, a re-sampling method is described which reduces the ensemble size of reservoir models which are to be updated.

La présente invention concerne un procédé, un système et un appareil de mise à jour en temps réel du modèle de réservoir au moyen de filtres Kalman d'ensemble. Le procédé comporte une opération par laquelle on met en conformité les unes avec les autres les variables statiques et les variables dynamiques pendant une opération temporelle de la mise à jour. On utilise également un procédé d'atténuation itératif conjointement avec l'opération de mise en conformité pour tenir compte des caractéristiques non-gaussiennes et non-linéaires du système. L'invention concerne également un procédé de ré-échantillonnage réduisant les dimensions d'ensemble des modèles de réservoir à mettre à jour.

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