Waterflood oil recovery process employing biopolymers of...

Details Waterflood oil recovery process employing biopolymers of... Waterflood oil recovery process employing biopolymers of...

E - Fixed Constructions

21

B

31/26, 166/32

E21B 43/20 (2006.01) C09K 8/588 (2006.01) E21B 43/22 (2006.01)

Patent

CA 1079947

WATERFLOOD OIL RECOVERY PROCESS EMPLOYING BIOPOLYMERS OF ENHANCED VISCOSITY YIELD Abstract of the Disclosure Waterflood oil recovery process in which a Xanthomonas polysaccharide is employed as a thickening agent and in which the pH and salinity of the polysaccharide solution are maintained at levels to enhance the viscosity yield of the polysaccharide. The polysaccharide is present in a concentration greater than 0.05 weight percent but no greater than 0.2 weight percent. The pH of the injected aqueous polysaccharide solution is within the range of 8-10. The salinity varies somewhat with the polysaccharide solution. Where the polysaccharide is present in a concentration greater than 0.05 weight percent. but no greater than 0.1 weight percent, it has a salinity of at least 3.0 weight percent. Where the polysaccharide concentration is greater than 0.1 weight percent but no greater than 0.2 weight percent, the salinity is within the range of 105-5.0 weight percent. -1-

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