Method of enhancing oil recovery by use of exopolymer-...

Details Method of enhancing oil recovery by use of exopolymer-... Method of enhancing oil recovery by use of exopolymer-...

E - Fixed Constructions

21

B

166/31, 195/64.1

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

Patent

CA 1196303

ABSTRACT A method of controlling and selectively reducing the permeability of zones in an oil-bearing underground formation which have higher permeabilities than the sur- rounding zones by injection of exopolymer producing microorganisms into the oil-bearing formation is des- cribed. The exopolymer production of the microorganisms used in the method is controlled by regulation of the availability to the microorganisms of a compound such as sucrose which triggers exopolymer production.

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