Method of microbial enhanced oil recovery

Details Method of microbial enhanced oil recovery Method of microbial enhanced oil recovery

1991-02-21

1992-11-17

Suchfield, George A.

Wells

Processes

Using microorganisms

166268, 435281, E21B 4322

Patent

active

051635100

ABSTRACT:
A method of microbial enhanced oil recovery for recovering oil from an oil-bearing rock formation. A population of aerobic bacteria is introduced into the formation at a position spaced from a production borehole. The micro-organisms are adapted to use oil as a carbon source. Pressurised injection water is introduced into the formation via an injection borehole, the water including a source of oxygen and mineral nutrients. The bacteria multiply using the oil as their main carbon source and the oxygen in the injection water as their main oxygen source. In so doing, they dissociate the oil from the rock formation and the dissociated oil is removed via the production borehole by the injection water.

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