Thermal injection and in situ combustion process for heavy oils

Details Thermal injection and in situ combustion process for heavy oils Thermal injection and in situ combustion process for heavy oils

1983-02-02

1985-01-29

Suchfield, George A.

Wells

Processes

In situ combustion

166263, 166272, E21B 43243

Patent

active

044959940

ABSTRACT:
A method is disclosed for recovering hydrocarbons from heavy oil and tar sand formations by a series of sequenced steps, wherein the production wells are initially steam stimulated. Thereafter, about 0.6 to about 1.2 pore volumes of steam of a relatively high steam quality are injected into the formation through the injection wells. An additional quantity of steam is then injected wherein the steam quality is decreased to a relatively low quality. Water injection and wet in situ combustion conclude the method.

REFERENCES:
patent: Re27252 (1971-12-01), Sklar et al.
patent: 3360045 (1967-12-01), Santourian
patent: 3375870 (1968-04-01), Satter et al.
patent: 3409077 (1968-11-01), Durie
patent: 3563312 (1971-02-01), Zwicky
patent: 3680634 (1972-08-01), Peacock et al.
patent: 3794113 (1974-02-01), Strange
patent: 3991828 (1976-11-01), Allen et al.
patent: 4060129 (1977-11-01), Gomaa et al.
Meldau, Robert F., et al., "Cyclic Gas/Steam Stimulation of Heavy-Oil Wells".

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