CPC E21B 43/164 (2013.01) [E21B 43/40 (2013.01)] | 25 Claims |
1. A method of Enhanced Oil Recovery (EOR) from an oil reservoir by CO2 flooding, comprising:
producing a well stream from an oil reservoir;
separating the well stream into a liquid phase and a gas phase with a first gas/liquid separator, wherein the gas phase comprises both CO2 gas and hydrocarbon gas;
cooling the gas phase with a first cooler;
compressing the gas phase using a first compressor into a compressed stream;
mixing the compressed stream with an external source of CO2 in a mixer to form an injection stream;
cooling the injection stream with a second cooler arranged downstream of the mixer; and
injecting the injection stream into the reservoir.
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