[특허]Method for increased oil recovery from an oil field

[미국특허] Method for increased oil recovery from an oil field 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E21B-043/00
출원번호	UP-0122181 (2008-05-16)
등록번호	US-7677309 (2010-04-21)
발명자 / 주소	Shaw, Gareth David Huntley Olsvik, Ola Rytter, Erling Sogge, Jostein Stensen, Jan Age
출원인 / 주소	Statoil ASA Petrosa (The Petroleum Oil & Gas Corporation of SA (Pty) Ltd)
대리인 / 주소	K&L Gates LLP
인용정보	피인용 횟수 : 85 인용 특허 : 4

초록 ▼

A method for increasing oil recovery from an oil reservoir in which method surplus gas streams from a plant for synthesis of higher hydrocarbons from natural gas is injected into the reservoir, is described. The surplus streams from the plant is the tailgas from the synthesis and optionally nitrogen

대표청구항 ▼

The invention claimed is: 1. A plant for providing gas for down-hole injection for pressure support in an oil reservoir for recovery of hydrocarbons and production of oxygenated hydrocarbons or higher hydrocarbons from natural gas, comprising: an air separation unit for production of an oxygen-rich fraction for supply to processes that require oxygen and a nitrogen-rich fraction for injection; a reformer for conversion of a mixture of natural gas, water and oxygen or oxygen-enriched air from the air separation unit into a synthesis gas comprising mainly H2, CO, CO2 and small amounts of methane in addition to any inert gas; a synthesis unit for conversion of the synthesis gas for synthesis of higher hydrocarbons; means for injecting gas into the reservoir; means for transferring nitrogen from the air separation unit to the means for injecting gas; means for transferring at least a part of a waste gas from the synthesis unit to the means for injecting gas; means for transferring steam generated in the plant to the means for injecting gas into the reservoir; and, a tail gas treatment unit for removing CO by a shift reaction and separation of hydrogen from the remaining tail gas. 2. The plant according to claim 1 further comprising means for transferring the remaining tail gas from the tail gas treatment unit to the means for injecting gas. 3. The plant according to claim 2, wherein the synthesis unit comprises one or more once-through Fischer-Tropsch units for synthesis of higher hydrocarbons. 4. The plant according to claim 1, wherein the synthesis unit comprises one or more once-through Fischer-Tropsch units for synthesis of higher hydrocarbons. 5. The plant according to claim 1, wherein a line is provided to transfer steam generated in reformer to the means for injecting gas. 6. A plant for providing gas for down-hole injection for pressure support in an oil reservoir for recovery of hydrocarbons and production of oxygenated hydrocarbons or higher hydrocarbons from natural gas, comprising: an air compression unit for production of compressed air for supply to processes that require air; a reformer for conversion of a mixture of natural gas, water and oxygen or oxygen-enriched air from the air separation unit into a synthesis gas comprising mainly N2, H2, CO, CO2 and small amounts of methane; a synthesis unit for conversion of the synthesis gas for synthesis of higher hydrocarbons; means for injecting gas into the reservoir; means for transferring nitrogen from the air separation unit to the means for injecting gas; means for transferring at least a part of the nitrogen-rich waste gas from the synthesis unit to the means for injecting gas; means for transferring steam generated in the plant to the means for injecting gas into the reservoir; and, a tail gas treatment unit for removing CO by a shift reaction and separation of hydrogen from the remaining tail gas. 7. The plant according to claim 6, further comprising means for transferring the remaining tail gas from the tail gas treatment unit to the means for injecting gas. 8. The plant according to claim 7, wherein the synthesis unit comprises one or more once-through Fischer-Tropsch units for synthesis of higher hydrocarbons. 9. The plant according to claim 6, wherein the synthesis unit comprises one or more once-through Fischer-Tropsch units for synthesis of higher hydrocarbons. 10. The plant according to claim 6, wherein a steam line is provided to transfer steam generated in a syngas cool down unit to the means for injecting gas.

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[미국특허] Method for increased oil recovery from an oil field 원문보기

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[미국특허] Method for increased oil recovery from an oil field 원문보기

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