Method of enhancing oil recovery by use of exopolymer producing

Details Method of enhancing oil recovery by use of exopolymer producing Method of enhancing oil recovery by use of exopolymer producing

1982-08-05

1984-07-17

Novosad, Stephen J.

Wells

Processes

Using microorganisms

166273, 166274, E21B 4322

Patent

active

044600437

ABSTRACT:
A method of controlling and selectively reducing the permeability of zones in an oil-bearing underground formation which have higher permeabilities than the surrounding zones by injection of exopolymer producing microorganisms into the oil-bearing formation is described. 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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patent: 4119546 (1978-10-01), Wernau
patent: 4128482 (1978-12-01), Knight
patent: 4352741 (1982-10-01), Wernau

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