Method for controlling fluid loss in high permeability...

Details Method for controlling fluid loss in high permeability... Method for controlling fluid loss in high permeability...

E - Fixed Constructions

21

B

E21B 43/16 (2006.01) C09K 8/08 (2006.01) C09K 8/10 (2006.01) C09K 8/512 (2006.01) C09K 8/516 (2006.01) C09K 8/68 (2006.01) C09K 8/92 (2006.01) E21B 21/00 (2006.01)

Patent

CA 2148061

The present invention provides a method of controlling fluid loss to a permeable formation penetrated by a wellbore. A novel fluid loss agent is prepared by forming a crosslinked polymer gel which then is sheared to break the gel into discrete particles. A slurry then is formed of the particles by dispersing the particles in an aqueous fluid having a density similar to that of the gel particles . The slurry then is introduced into contact with the permeable formation and a filter cake of the particles is formed upon contact with the formation and loss of the slurrying fluid to the formation. The filter cake provides further fluid loss control to the permeable formation.

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