Patent ID: 6505683
Filing Date: 2003-01-14
Classification: C01B,E21B,F25J,Y02P

Abstract:
A process for purification of a G/L two-phase effluent containing carbon dioxide and gaseous and liquid hydrocarbons obtained from at least one hydrocarbon production well utilizing an injection of carbon dioxide into a formation, said process comprising:a) separating said G/L effluent in at least one main gas-liquid separator (3), to separate C3+ hydrocarbons (5) from a gaseous effluent (10) containing a major portion of carbon dioxide (CO2) and a minor portion of methane and ethane, b) subjecting said gaseous effluent to pressurized combustion (13) in the presence of oxygen in a combustion reactor, and recovering a combustion effluent (21) containing carbon dioxide, water vapor, and nitrogen, c) cooling (11/22) said combustion effluent (21), d) separating the nitrogen at least in part from the cooled combustion effluent; and e) recycling the pressurized, cooled combustion effluent into an injection well.