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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0549140 (1983-11-07) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 275 인용 특허 : 2 |
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, e
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.
A method for the in-situ recovery of a combustible product gas consisting essentially of carbon monoxide and hydrogen from a subterranean, viscous oil-containing formation including tar sand deposits traversed by at least one injection well and one production well and wherein said oil-containing for
A method for the in-situ recovery of a combustible product gas consisting essentially of carbon monoxide and hydrogen from a subterranean, viscous oil-containing formation including tar sand deposits traversed by at least one injection well and one production well and wherein said oil-containing formation has previously been subjected to an in-situ combustion operation for a period of time sufficient to recover the maximum amount of oil therefrom and leaving a solid, coke like residue on the formation mineral matrix, comprising the steps of: (a) introducing a combustible gas selected from the group consisting of methane, ethane, propane, natural gas or mixtures thereof into the formation via said injection well in an amount to substantially saturate the formation with said gas; (b) introducing an oxygen-containing gas into the formation via said injection well to reinitiate in-situ combustion therein; (c) thereafter introducing a mixture of an oxygen-containing gas and steam into the formation via said injection well causing conversion of the coke-like material to a combustible product gas consisting essentially of carbon monoxide and hydrogen in the formation; and (d) recovering the combustible product gas from the subterranean formation via said production well.
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