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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0055412 (1987-05-27) |
발명자 / 주소 |
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인용정보 | 피인용 횟수 : 377 인용 특허 : 8 |
Process for in situ recovery of carbonaceous values from underground petroleum impregnated media such as oil shale, under controlled radiation from a microwave distributing source adjacent the media, e.g. in a borehole, effected in the absence of air, such that the radiation is distributed at least
Process for in situ recovery of carbonaceous values from underground petroleum impregnated media such as oil shale, under controlled radiation from a microwave distributing source adjacent the media, e.g. in a borehole, effected in the absence of air, such that the radiation is distributed at least initially at incrementally increasing power and/or at least initially in intermittent interval cycles of on and off duration of the microwaves, for selective pyrolysis of the organic content of the media to liquid, vapor and gas form as the case may be under autogenous pressure in the pores of the media for driving the organic constituents therefrom for appropriate recovery, e.g. via the borehole, including breakup of larger molecules, e.g. hydrocarbons, for selective increase in the noncondensible gas quantities in proportion to the liquid and/or condensible oil vapor quantities, plus pyrolysis scavenging of residual carbon coke by gasification thereof to noncondensible gas constituents, optionally using a portion of the recovered noncondensible gases to produce electrical energy for energizing the microwave source, and conjoint probe apparatus having an adjustable extendable probe end for embedding in the porous media for in situ sensing of changes in the dielectric constant of the carbonaceous constituents undergoing microwave pyrolysis, and a mechanism for indicating the sensed changes, for adjusting the radiation in dependence upon such changes, the degree of extension of the probe end being adjustable in dependence upon the sensed frequency of the attendant radiation.
Process for in situ recovery of extractable carbonaceous values from underground petroleum impregnated porous media comprising: subjecting the underground petroleum impregnated porous media, in situ and in the substantial absence of air, to microwave radiation from a microwave distributing source su
Process for in situ recovery of extractable carbonaceous values from underground petroleum impregnated porous media comprising: subjecting the underground petroleum impregnated porous media, in situ and in the substantial absence of air, to microwave radiation from a microwave distributing source substantially immediately adjacent the media and distributed at least initially at incrementally increasing radiation power, for heating the impregnated petroleum content preferentially relative to the corresponding porous media and progressively in a direction away from the microwave source and to a selective temperature of at least about 425°C. and sufficiently for liquefying substantially the liquefiable petroleum constituents present which liquify at the corresponding heating temperature and in turn for causing the thereby formed mixture of liquified and gasified constituents to migrate under autogenous pressure through the porous media in a direction toward the microwave source; and recovering the migrating constituents from the vicinity of the microwave source; and wherein the radiation is distributed initially in intermittent interval cycles of on and off duration in a first phase, and thereafter is distributed substantially continuously in a second phase.
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