Method for recovery of natural gas from a group of...

E - Fixed Constructions – 21 – B

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E21B 43/22 (2006.01)

Patent

CA 2619557

A method for recovering natural gas from a group of subterranean zones containing natural gas, including injecting an amount of a displacing gas into a first subterranean zone, producing a first produced gas from the first subterranean zone, collecting an amount of the first produced gas wherein the quality of the collected first produced gas is higher than or equal to a threshold production quality for the first produced gas, injecting an amount of the first produced gas into a second subterranean zone wherein the quality of the injected first produced gas is higher than or equal to a threshold injection quality for the first produced gas, producing a second produced gas from the second subterranean zone, and collecting an amount of the second produced gas wherein the quality of the collected second produced gas is higher than or equal to a threshold production quality for the second produced gas.

Il s'agit d'une méthode de récupération du gaz naturel provenant d'un groupe de zones souterraines qui en contiennent, et qui comprend les étapes qui suivent. L'injection d'une certaine quantité de gaz de déplacement dans une première zone souterraine; la première production de gaz provenant de la première zone souterraine; la collecte d'une certaine quantité de la première production de gaz, où la qualité de cette première production est supérieure ou égale au seuil de qualité de production applicable à la première production de gaz; l'injection d'une certaine quantité de la première production de gaz dans une seconde zone souterraine, où la qualité de la première production de gaz injecté est supérieure ou égale au seuil de qualité d'injection de la première production de gaz; la seconde production de gaz provenant de la seconde sone souterraine; et la collecte d'une certaine quantité de la seconde production de gaz, où la qualité de la seconde production de gaz collecté est supérieure ou égale au seuil de qualité de production de la seconde production de gaz.

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