A drag-reducing agent for use in injection water at oil...

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 3/00 (2006.01) C09K 8/06 (2006.01) C09K 8/584 (2006.01) C10M 173/02 (2006.01) E21B 43/22 (2006.01) F17D 1/17 (2006.01)

Patent

CA 2493100

The present invention relates to the use of a drag-reducing agent in an amount of 50-400 ppm in water having an electrolyte content of 0.01-7% by weight. The drag-reducing agent comprises two zwitterionics, each comprising acyl containing surfactant and an anionic surfactant, where the hydrophilic group is a sulphate, a sulphonate or an ether sulphate. The water containing the drag-reducing agent is suitable to be used in injection water at oil recovery.

La présente invention concerne un agent réducteur de traînée utilisé dans une quantité de 50-400 ppm dans une eau ayant une teneur de 0.01-7 % en poids en électrolyte. L'agent réducteur de traînée comprend deux zwitterions, chacun comportant un tensio-actif contenant de l'acyle et un tensio-actif anionique, le groupe hydrophile étant un sulphate, un sulphonate ou un éther sulphate. L'eau contenant l'agent réducteur de traînée est adapté pour être utilisé dans l'injection d'eau lors de la récupération d'huile secondaire.

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