公开(公告)号：US09902894B2

公开(公告)日：2018-02-27

申请号：US14927084

申请日：2015-10-29

Applicant: Chevron U.S.A. Inc.

Inventor： Varadarajan Dwarakanath ,  Robert M. Dean ,  Do Hoon Kim ,  Dennis Arun Alexis ,  Sophany Thach ,  Taimur Malik ,  Anette Poulsen ,  Sumitra Subrahmanyan

IPC: C09K8/588 ,  C09K8/584 ,  C09K8/68 ,  E21B43/16 ,  E21B43/26 ,  C09K8/88

CPC classification number: C09K8/588 ,  C09K8/584 ,  C09K8/68 ,  C09K8/88 ,  E21B43/16 ,  E21B43/26

Abstract: A method for making a polymer suspension for use in enhancing the production of oil from a formation is disclosed. In one embodiment, the method comprises mixing a powder polymer having an average molecular weight of 0.5 to 30 Million Daltons into a water soluble solvent having an HLB of greater than or equal to 8 for less than or equal to 24 hours. The water soluble solvent is selected from a group, at a weight ratio from 20:80 to 80:20. The polymer suspension is stable, pumpable, and substantially anhydrous; and it is hydrated for an injection solution in less than or equal to 4 hours, containing a polymer concentration ranging from 100 ppm to 50,000 ppm and having a filter ratio of less than or equal to 1.5 at 15 psi using a 1.2 μm filter, by mixing a sufficient amount of the polymer suspension in an aqueous fluid.