Miscible flooding with displacing fluid containing additive...

Details Miscible flooding with displacing fluid containing additive... Miscible flooding with displacing fluid containing additive...

E - Fixed Constructions

21

B

166/33

E21B 43/20 (2006.01) C09K 8/594 (2006.01) E21B 43/16 (2006.01)

Patent

CA 1215641

ABSTRACT A method for displacing hydrocarbons from a hydrocarbon-bearing subterranean reservoir by injecting a displacing fluid comprising a primary fluid such as carbon dioxide or rich gas, and an additive such as nitrogen, methane, flue gas, propane, butane, LPG, hydrogen sulfide, carbon monoxide, and mixtures thereof, said additive having a concentration sufficient to adjust the phase equilibrium of mixtures of the displacing fluid with res- ervoir hydrocarbons. The additive adjusts the phase equi- librium so that utilization of the displacing fluid is more efficient.

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