Enhanced oil recovery

Details Enhanced oil recovery Enhanced oil recovery

C - Chemistry, Metallurgy

12

S

C12S 1/00 (2006.01) C09K 8/52 (2006.01) C09K 8/90 (2006.01) C12P 7/56 (2006.01) E21B 43/22 (2006.01) E21B 43/27 (2006.01)

Patent

CA 2105288

2105288 9215771 PCTABS00016 The present invention relates to the use of lactic acid bacteria in oil recovery operations. The invention provides a method of stimulating oil recovery from an oil reservoir which comprises: (i) injecting an inoculum of a lactic acid bacterium compatible with the reservoir conditions into a well bore drilled into the reservoir; (ii) injecting a source of nutrients for the bacterium into the reservoir; (iii) allowing the bacterium to ferment thereby producing lactic acid; and (iv) recovering oil from the reservoir. Particularly preferred bacteria are those of the genera Lactobacillus or Pediococcus. Lactic acid produced by bacteria may also be used for removal of carbonate or iron scale in oilfield equipment.

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