Biocidal control in recovery of oil by water injection

Details Biocidal control in recovery of oil by water injection Biocidal control in recovery of oil by water injection

E - Fixed Constructions

21

B

E21B 43/22 (2006.01) A01N 59/00 (2006.01) C02F 1/76 (2006.01)

Patent

CA 2508930

The invention provides in a water injection system and in a water injection process for secondary oil and/or gas recovery, the presence and use of a biocidally-effective amount of a sulfamate-stabilized, bromine-based biocide with injection water that is to be used in the system or process such that bromine-based biocide is present in at least a portion of the system and/or in at least a portion of the water in the system. A composition especially adapted for use in secondary oil recovery operations, is comprised of seawater with which has been blended a biocidally-effective amount of a sulfamate- stabilized, bromine-based biocide.

Dans un système d'injection d'eau et dans un procédé d'injection d'eau pour une extraction secondaire de pétrole et/ou de gaz, l'invention prévoit la présence et l'utilisation d'une quantité biocide efficace d'un biocide à base de bromine stabilisée par du sulfamate, et de l'eau d'injection à utiliser dans le système ou dans le procédé, de sorte que le biocide à base de bromine est présent dans au moins une partie du système et/ou dans au moins une partie de l'eau du système. Une composition spécialement appropriée à une utilisation dans des opérations d'extraction secondaire de pétrole, est constituée d'eau de mer à laquelle est mélangée une quantité biocide efficace d'un biocide à base de bromine stabilisée par du sulfamate.

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