Recovering hydrocarbons with a mixture of carbon dioxide and alc

Details Recovering hydrocarbons with a mixture of carbon dioxide and alc Recovering hydrocarbons with a mixture of carbon dioxide and alc

1987-07-30

1989-01-31

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

252 8554, E21B 4322

Patent

active

048009571

ABSTRACT:
The invention is a method of recovering hydrocarbons from underground hydrcarbon formations by injecting a mixture of carbon dioxide and a polar alcohol or polar glycol additive, said additive having less than about 9 carbon atoms. The mixture of carbon dioxide and additive is injected at a temperature and pressure above the critical temperature and pressure of carbon dioxide. The alcohol or glycol additive comprises about 0.1% to about 10% by weight of the injected mixture. After being injected through an injection well, the mixture is driven through the formation and the hydrocarbons and other fluids are recovered at one or more production wells.

REFERENCES:
patent: 3334688 (1967-08-01), Blackwell et al.
patent: 3623552 (1971-11-01), Vairogs
patent: 3811502 (1974-05-01), Burnett
patent: 3811503 (1974-05-01), Burnett et al.
patent: 4502538 (1985-03-01), Wellington et al.
patent: 4609043 (1986-04-01), Cullick
patent: 4617996 (1986-10-01), Shu

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