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

1983-12-16

1985-12-31

Novosad, Stephen J.

Wells

Processes

Using microorganisms

E21B 4322

Patent

active

045615004

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), Wernan
patent: 4128482 (1978-12-01), Knight
patent: 4352741 (1982-10-01), Wernan

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