Treatment and reuse of oilfield produced water

Details Treatment and reuse of oilfield produced water Treatment and reuse of oilfield produced water

C - Chemistry, Metallurgy

02

F

C02F 1/68 (2006.01) C02F 1/00 (2006.01) C09K 8/68 (2006.01) E21B 43/267 (2006.01) C12N 9/99 (2006.01) E21B 43/40 (2006.01)

Patent

CA 2639411

The invention discloses treatment and reuse of oilfield produced water. A method of inhibiting enzymes/bacteria in an aqueous medium for viscosification comprises contacting the aqueous medium with a denaturant and/or a bactericide and thereafter mixing a gelling agent in the aqueous medium. The viscosified fluid can be used as a well treating fluid for fracturing and other applications. A well treatment fluid comprises a metal denaturant and/or a bactericide and a gelling agent in an amount effective to viscosify the fluid. Also disclosed is oilfield produced water denatured with from 1 to 2000 ppm by weight of a zirconium compound.

L'invention concerne un traitement et une réutilisation d'une eau de gisement pétrolifère. Un procédé consistant à inhiber des enzymes/bactéries dans un milieu aqueux pour une viscosification comprend la mise en contact du milieu aqueux avec un dénaturant et/ou un bactéricide, puis le mélange d'un agent gélifiant dans le milieu aqueux. Le fluide viscosifié peut être utilisé en tant que fluide de traitement de puits pour une fracturation et d'autres applications. Un fluide de traitement de puits comprend un dénaturant métallique et/ou un bactéricide et un agent gélifiant dans une quantité efficace pour viscosifier le fluide. L'invention concerne également une eau de gisement pétrolifère dénaturée par 1 à 2 000 ppm en poids d'un composé de zirconium.

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