Processes for secondarily recovering oil

Details Processes for secondarily recovering oil Processes for secondarily recovering oil

1974-06-10

1976-06-22

Novosad, Stephen J.

Wells

Processes

In situ combustion

166251, 166266, 166268, E21B 4300, E21B 4324

Patent

active

039645452

ABSTRACT:
A secondary recovery process using injected air to pressurize the formation and maintain mobility of the reservoir oil by diluting the oil with carbon dioxide. Carbon dioxide is produced as a by-product of air injection, either by auto-oxidation of carbonaceous materials in the reservoir rock, or by ignition of oil in the reservoir. Efficiency of oxidation is observed by testing O.sub.2 content of the effluent gas; it is desirable to hold the oxygen content in the effluent gas to less than 3% by volume in the effluent gas. When this content cannot be reached by auto-oxidation, it is necessary to ignite the oil.

REFERENCES:
patent: 2630307 (1953-03-01), Martin
patent: 2642943 (1953-06-01), Smith et al.
patent: 2718263 (1955-09-01), Heilman et al.
patent: 2771951 (1956-11-01), Simm
patent: 2818117 (1957-12-01), Koch
patent: 3019837 (1962-02-01), Marx et al.
patent: 3032102 (1962-05-01), Parker
patent: 3072185 (1963-01-01), Bond et al.
patent: 3174543 (1965-03-01), Sharp
patent: 3205944 (1965-09-01), Walton
patent: 3209825 (1965-10-01), Alexander et al.

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