Stabilizing the viscosity of an aqueous solution of...

Details Stabilizing the viscosity of an aqueous solution of... Stabilizing the viscosity of an aqueous solution of...

C - Chemistry, Metallurgy

09

K

31/26

C09K 8/90 (2006.01)

Patent

CA 1070492

A B S T R A C T In an oil recovery process in which an aqueous solution thickened with a water-soluble anionic polysaccharide polymer (Xanthan gum) is injected into a subterranean reservoir, the stability of the solution viscosity is improved by de-oxygenating the aqueous liquid and then adding a sulphur-containing antioxidant, a readily oxidizable water-soluble alcohol or glycol, and a polysaccharide polymer.

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