Stabilizing polysaccharide solutions for tertiary oil...

Details Stabilizing polysaccharide solutions for tertiary oil... Stabilizing polysaccharide solutions for tertiary oil...

E - Fixed Constructions

21

B

31/26

E21B 43/22 (2006.01) C09K 8/90 (2006.01)

Patent

CA 1206739

STABILIZING POLYSACCHARIDE SOLUTIONS FOR TERTIARY OIL RECOVERY AT ELEVATED TEMPERATURE WITH BOROHYDRIDE Abstract A method of tertiary oil recovery from petroleum- containing formations at elevated temperature comprises injecting a substantially oxygen-free aqueous saline solution of water-soluble polysaccharide biopolymer treated at pH of at least 5 by the addition of alkali metal borohydride as viscosity stabilizer.

438932

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