Method and system for CO2 enhanced oil recovery

A method of enhanced oil recovery (EOR) by separating a well stream 4 into a gas phase 26 and liquid phase 9 using a gas/liquid separator 16, cooling the gas phase using a cooler 27 and compressing the gas phase using a compressor 30 to form a compressed gas stream 11. The compressed gas is combined...

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Bibliographische Detailangaben
Hauptverfasser: Torbjørn Fiveland, Olav Kristiansen, Knut Arild Maråk, Bengt Olav Neeraas, Per Ivar Karstad, Michael Drescher, Thomas Levy
Format: Patent
Sprache:eng
Schlagworte:
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Zusammenfassung:A method of enhanced oil recovery (EOR) by separating a well stream 4 into a gas phase 26 and liquid phase 9 using a gas/liquid separator 16, cooling the gas phase using a cooler 27 and compressing the gas phase using a compressor 30 to form a compressed gas stream 11. The compressed gas is combined with an external source of CO2 12 to form an injection stream which is cooled in a second cooler 34 and compressed in a second compressor 36 prior to injection at an injection wellhead 15. Also disclosed is an arrangement where a portion of the cooled compressed gas phase is recycled via line 32 connecting upstream of the separator or a line 31 downstream of the separator. Also disclosed is an arrangement where a second gas/liquid separator 44 is included and the outputs are combined.