Method of estimating well disposal capacity

G - Physics – 06 – F

Patent

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G06F 17/50 (2006.01) E21B 21/08 (2006.01) G06F 17/40 (2006.01)

Patent

CA 2716018

A method for determining a maximum volume of drilling cuttings disposal in a formation, the method including inputting formation parameters into a simulator, simulating a formation during waste injection based on the formation parameters, determining a net pressure based on the simulating, determining a closure pressure increase based on the simulating, calculating a disposal volume based on the net pressure and the closure pressure, calculating a time interval of waste injection based on the calculated injection volume, and outputting at least one of the disposal volume and the time interval is disclosed. A method of optimizing a waste injection process, the method including simulating a formation based on input parameters, determining a closure pressure increase per unit slurry volume based on the simulation, calculating a disposal capacity of the selected formation, and outputting the disposal capacity is also disclosed.

L'invention porte sur un procédé pour déterminer un volume maximal de déblais de forage à éliminer dans une formation, le procédé comprenant l'entrée de paramètres de formation dans un simulateur, le simulation d'une formation pendant une injection de déchets sur la base des paramètres de formation, la détermination d'une pression nette sur la base de la simulation, la détermination d'une augmentation de pression de fermeture sur la base de la simulation, le calcul d'un volume d'élimination sur la base de la pression nette et de la pression de fermeture, le calcul d'un intervalle de temps d'injection de déchets sur la base du volume d'injection calculé, et la délivrance en sortie d'au moins l'un du volume d'élimination et de l'intervalle de temps. L'invention porte également sur un procédé d'optimisation d'un procédé d'injection de déchets, le procédé comprenant la simulation d'une formation sur la base de paramètres d'entrée, la détermination d'une augmentation de pression de fermeture par unité de volume de bouillie sur la base de la simulation, le calcul d'une capacité d'élimination de la formation sélectionnée et la délivrance en sortie de la capacité d'élimination.

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