In-situ gasification of tar sands utilizing a combustible gas

Details In-situ gasification of tar sands utilizing a combustible gas In-situ gasification of tar sands utilizing a combustible gas

1983-11-07

1986-03-04

Novosad, Stephen J.

Wells

Processes

In situ combustion

166261, E21B 43243, C10J 500

Patent

active

045735301

ABSTRACT:
A subterranean, viscous oil-containing formation, e.g. tar sands, which has previously been exploited by an in-situ combustion operation to recover the maximum amount of oil therefrom and leaving a solid coke like residue in the formation, is first saturated with a combustible gas such as methane, ethane, propane, natural gas or mixtures thereof, thereafter reinitiating in-situ combustion and then injecting a mixture of an oxygen-containing gas and steam to convert the coke like residue to a combustible product gas consisting predominantly of carbon monoxide and hydrogen within the formation. The combustible product gas is recovered and may be utilized directly as a fuel gas, or may be utilized as feed stock for petro chemical manufacturing processes.

REFERENCES:
patent: 2780449 (1957-02-01), Fisher et al.
patent: 2793697 (1957-05-01), Simm et al.
patent: 3035638 (1962-05-01), Parker et al.
patent: 3044545 (1962-07-01), Tooke
patent: 4353418 (1982-10-01), Hoekstra et al.
patent: 4397352 (1983-08-01), Audeh

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