Method for enhanced oil recovery

Wells – Processes – Distinct – separate injection and producing wells

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166266, 166274, E21B 4324, E21B 4340

Patent

active

043444865

ABSTRACT:
Disclosed is a method and apparatus for the enhanced recovery of liquid hydrocarbons from underground formations, said method comprising recovering a mixture comprising carbon dioxide and contaminants comprising hydrocarbon, hydrogen sulfide, or mixtures thereof, from an underground formation; combusting said mixture with an oxygen enriched gas to form a concentrated carbon dioxide stream; and injecting at least a portion of said concentrated carbon dioxide stream into an underground formation to enhance recovery of liquid hydrocarbon.

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patent: 4130403 (1978-12-01), Cooley et al.

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