Enhanced oil recovery process employing carbon dioxide

Details Enhanced oil recovery process employing carbon dioxide Enhanced oil recovery process employing carbon dioxide

E - Fixed Constructions

21

B

166/31

E21B 43/22 (2006.01) E21B 43/16 (2006.01) E21B 43/18 (2006.01)

Patent

CA 1271410

ABSTRACT OF THE DISCLOSURE A process for recovering hydrocarbons, e.g., crude petroleum, from a formation comprising: (a) injecting carbon dioxide into the formation; (b) shutting off the wells to the formation to allow the carbon dioxide to contact and disperse in the hydrocarbons in the formation; (c) recovering hydrocarbons from the formation; (d) repeating steps (a), (b) and (c) at least once; (e) injecting a carbonated aqueous liquid composition into the formation to drive the hydrocarbons toward the production well or wells and (f) recovering hydrocarbons from the formation.

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