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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0435979 (1982-10-22) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 376 인용 특허 : 8 |
A method of electromagnetic heating in situ recovers liquid hydrocarbons from an oil shale formation containing kerogen in an inorganic matrix where the formation is substantially impermeable to fluids under native conditions. A block of the oil shale formation is substantially uniformly heated in s
A method of electromagnetic heating in situ recovers liquid hydrocarbons from an oil shale formation containing kerogen in an inorganic matrix where the formation is substantially impermeable to fluids under native conditions. A block of the oil shale formation is substantially uniformly heated in situ with electromagnetic power to a temperature of about 275°C. where there is pyrolysis of a portion of the kerogen to gas and shale oil at a pressure sufficient to overcome the capillary pressure of the shale oil in the matrix, thereby providing substantial fluid permeability to the formation. The gas thereupon escaping from said block and the shale oil driven thereby are recovered, thereby further increasing the permeability of the formation. The magnitude of the electromagnetic power is controlled to raise the temperature of the block relatively slowly to increase the rate of pyrolysis of the kerogen as the permeability of the formation increases to produce gas at pressures above the necessary to overcome the capillary pressure and below that at which there is substantial escape of the gas bypassing shale oil within the formation rather than driving the oil before it.
A method for recovering liquid hydrocarbons from an oil shale formation containing kerogen in an inorganic matrix, said formation being substantially impermeable to fluids under native conditions, said method comprising: substantially uniformly heating a block of said oil shale formation in situ wit
A method for recovering liquid hydrocarbons from an oil shale formation containing kerogen in an inorganic matrix, said formation being substantially impermeable to fluids under native conditions, said method comprising: substantially uniformly heating a block of said oil shale formation in situ with electromagnetic power to a temperature of about 275°C. where there is pyrolysis of a portion of said kerogen to gas and shale oil at a pressure sufficient to overcome the capillary pressure of said shale oil in said matrix, thereby providing substantial fluid permeability to said formation, utilizing said pressurized gas to drive at least portions of said gas and shale oil from said block, recovering said gas thereupon escaping from said block under said pressure and said shale oil driven by said gas, thereby further increasing the fluid permeability of said formation, and controlling the magnitude of said electromagnetic power to raise the temperature of said block relatively slowly to increase the rate of pyrolysis of said kerogen as the permeability of said formation increases to produce gas at pressures above that necessary to overcome said capillary pressure and below that at which there is substantial escape of said gas bypassing shale oil within the formation rather than driving said oil before it.
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