Treatment and reuse of oilfield produced water for...

E - Fixed Constructions – 21 – B

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E21B 21/06 (2006.01) C09K 8/68 (2006.01) C09K 8/80 (2006.01)

Patent

CA 2735410

The invention discloses method of treatment and reuse of oilfield produced water. The method comprises: providing an aqueous medium comprised at least in part of oilfield produced water; contacting the aqueous medium with a zirconium compound; whereby the fluid viscosity and/or fluid drag reduction ability of the combination of the aqueous medium and zirconium compound is improved compared to the aqueous medium alone; introducing the combination in to the well; and allowing the combination to contact the formation. In another embodiment, the aqueous medium is further contacted by a friction-reduction additive. Still in another embodiment, the aqueous medium is further contacted by a gelling additive. Still in another embodiment, the fluid is energized with a gas.

La présente invention concerne un procédé de traitement et de réutilisation deau produite par un champ pétrolifère. Le procédé consiste : à fournir un agent aqueux composé au moins en partie deau produite par le champ pétrolifère; à mettre en contact lagent aqueux avec un composé de zirconium; la capacité de réduction de viscosité fluide et/ou de traînée fluide de lassociation de lagent aqueux et du composé de zirconium étant ainsi améliorée par rapport à lagent aqueux seul; à introduire lassociation dans le puits; et à permettre à lassociation dentrer en contact avec la formation. Dans un autre mode de réalisation, lagent aqueux est en outre mis en contact avec un additif de réduction de frottement. Dans encore un autre mode de réalisation, lagent aqueux est en outre mis en contact avec un additif de gélification. Dans un mode de réalisation supplémentaire, le fluide est déplacé avec un gaz.

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