Methods of using fluid loss additives comprising micro gels

Details Methods of using fluid loss additives comprising micro gels Methods of using fluid loss additives comprising micro gels

C - Chemistry, Metallurgy

09

K

C09K 8/512 (2006.01)

Patent

CA 2756920

Methods and fluids are provided that include, but are not limited to, a drilling fluid comprising an aqueous base fluid and a fluid loss control additive that comprises at least one polymeric micro gel and a method comprising: providing an aqueous based treatment fluid comprising a fluid loss control additive that comprises at least one polymeric micro gel; placing the aqueous based treatment fluid in a subterranean formation via a well bore penetrating the subterranean formation; allowing the fluid loss control additive to become incorporated into a filter cake located on a surface within the subterranean formation; allow-ing the filter cake to be degraded; and producing hydrocarbons from the formation. Additional methods are also provided.

Les procédés et les fluides ci-décrits comprennent, sans caractère limitatif, un fluide de forage comprenant un fluide de base aqueux et un additif anti-perte de fluide qui comprend au moins un microgel polymère. Le procédé selon l'invention comprend les étapes consistant à : utiliser un fluide de traitement aqueux comprenant un additif anti-perte de fluide qui comprend au moins un microgel polymère; introduire le fluide de traitement aqueux dans une formation souterraine par un puits de forage pénétrant dans la formation souterraine; laisser l'additif anti-perte de fluide s'incorporer dans un gâteau de filtration situé sur une surface dans la formation souterraine; laisser le gâteau de filtration se dégrader; et produire des hydrocarbures à partir de la formation. Des procédés supplémentaires sont également décrits.

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