Microbiocidal anionic sequesterants with polyvalent metal...

Details Microbiocidal anionic sequesterants with polyvalent metal... Microbiocidal anionic sequesterants with polyvalent metal...

E - Fixed Constructions

21

B

31/21

E21B 43/25 (2006.01) C09K 8/88 (2006.01) E21B 33/138 (2006.01)

Patent

CA 1254025

31441CA ABSTRACT OF THE DISCLOSURE A water permeability correction process, and composition therefor, to improve the sweep efficiency of waterflooding which involves the sequential injection of (1) an optional aqueous preflush slug to adjust connate water salinity, (2) an aqueous sequestered polyvalent metal cation, such as chromium, wherein the sequestering anion is bactericidal, such as propionate, (3) a gelable polymeric viscosifier, such as polyacrylamide, and, preferably, (4) an aqueous drive fluid.

483939

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