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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0839412 (1992-02-21) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 304 인용 특허 : 0 |
A horizontal production well is located in the lower portion of a heavy viscous oil-bearing reservoir. A vertical injection well is located in the upper portion of the reservoir. Oxygen-enriched gas is injected down the injector well and ignited in the upper portion of the reservoir to create a comb
A horizontal production well is located in the lower portion of a heavy viscous oil-bearing reservoir. A vertical injection well is located in the upper portion of the reservoir. Oxygen-enriched gas is injected down the injector well and ignited in the upper portion of the reservoir to create a combustion zone that reduces viscosity of oil in the reservoir as the combustion zone advances downwardly toward the horizontal production well, the reduced-viscosity oil draining into the horizontal production well under force of gravity.
A method for the enhanced recovery of a heavy viscous oil from a subterranean, oil-bearing reservoir, comprising the steps of: a) locating at least one horizontal production well in a lower portion of said reservoir, b) locating at least one vertical injector well in an upper portion of said reservo
A method for the enhanced recovery of a heavy viscous oil from a subterranean, oil-bearing reservoir, comprising the steps of: a) locating at least one horizontal production well in a lower portion of said reservoir, b) locating at least one vertical injector well in an upper portion of said reservoir. locating at least one vent well in said reservoir, d) injecting an oxygen-enriched gas down said injector well into the upper portion of said reservoir. e) igniting said gas in the upper portion of said reservoir to create a combustion zone that reduces the viscosity of oil in said reservoir as said combustion zone advances downwardly toward said horizontal production well, said reduced viscosity oil draining into said horizontal production well under force of gravity, f) monitoring oxygen concentration and flue gas in said horizontal production well, terminating gas injection into the upper portion of said reservoir and venting the oxygen and flue gas from the reservoir through said vent well when a predetermined amount of oxygen is monitored in step f) within said horizontal production well, h) monitoring oxygen concentration in said vent well, i) shutting in said vent well when a predetermined amount of oxygen is monitored in step h) within said vent well, thereby allowing the reservoir to consume remaining oxygen in the reservoir, j) monitoring reservoir pressure, k) reinjecting said oxygen-enriched gas down said injection well when the monitored reservoir pressure falls below a predetermined level, and l) repeating steps f)-k).
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