Method of microbial enhanced oil recovery

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

E - Fixed Constructions

21

B

E21B 43/22 (2006.01) C09K 8/90 (2006.01) C12P 1/04 (2006.01) E21B 43/16 (2006.01)

Patent

CA 2100328

A method of microbial enhanced oil recovery for recovering oil from an oil- bearing rock formation (13). A population of aerobic bacteria (16) is introduced into the formation (13) at a position spaced from a production borehole (15). The microorgan- isms are adapted to use oil as a carbon source. Pressurized injection water (17) is introduced into the formation via an injection borehole (10)the water including a source of oxygen and mineral nutrients. The bacteria (16) 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 (15) and-the dissociated oil is removed via the production borehole (15) by the injection water.

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