Fluid loss additive for enhanced fracture clean-up

Details Fluid loss additive for enhanced fracture clean-up Fluid loss additive for enhanced fracture clean-up

C - Chemistry, Metallurgy

09

K

C09K 8/62 (2006.01) C09K 8/524 (2006.01) C09K 8/76 (2006.01) E21B 43/26 (2006.01) E21B 43/267 (2006.01)

Patent

CA 2610009

A hydraulic fracturing method is disclosed that includes designing a fracture treatment including a fluid pumping schedule to fracture a subterranean formation according to a design model that accounts for cumulative filter cake thickness, including polymer concentrated at the fracture surfaces, to provide a propped fracture width effectively greater than the cumulative filter cake thickness, and injecting fluids through a wellbore into the formation essentially according to the fluid pumping schedule of the fracture treatment design. A fracturing method is also disclosed that includes placing a high breaker loading in the filter cake. A composition is disclosed which comprises a fluid viscosified with a polymer and a fluid loss additive comprising a delayed breaker.

L'invention concerne un procédé de fracturation hydraulique qui consiste à concevoir un traitement de fracture comprenant un programme de pompage de fluide, afin de fracturer une formation souterraine conformément à un modèle de conception qui tient compte de l'épaisseur cumulée du gâteau de filtration, en incluant les polymères concentrés à la surface de la fracture, de manière à produire une fracture soutenue d'une largeur sensiblement supérieure à l'épaisseur cumulée du gâteau de filtration, et à injecter des fluides dans la formation à travers un trou de forage, en respectant sensiblement le programme de pompage de fluide défini dans le modèle de traitement de fracture. L'invention porte également sur un procédé de fracturation consistant à placer une charge viscoréductrice importante dans le gâteau de filtration. Une composition qui contient un fluide viscosifié à l'aide d'un polymère, et un réducteur de filtrat qui contient un viscoréducteur à effet retardé sont en outre décrits.

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