Copolymer for shale stabilization and method of use

Details Copolymer for shale stabilization and method of use Copolymer for shale stabilization and method of use

E - Fixed Constructions

21

B

E21B 21/00 (2006.01) C09K 8/12 (2006.01) C09K 8/24 (2006.01)

Patent

CA 2728166

Embodiments disclosed herein relate tomethods for stabilizing shales while drilling a wellbore into an earthen formation comprising circulating an aqueous based wellbore fluid in the wellbore while drilling through shales; wherein the aqueous-based wellbore fluid comprises a copolymer of acrylamide-type comonomers and at least one cationic comonomer.

Les modes de réalisations selon linvention concernent des procédés pour la stabilisation de schistes tout en forant un puits de forage dans une formation de terre, procédés qui comprennent la circulation dun fluide aqueux de puits de forage dans le puits tout en forant au travers de schistes. Le fluide aqueux de puits de forage comprend un copolymère de comonomères de type acrylamide et au moins un comonomère cationique.

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