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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0118957 (1980-02-06) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 328 인용 특허 : 0 |
The disclosure describes a technique for uniform heating of relatively large blocks of hydrocarbonaceous formations in situ using radio frequency (RF) electrical energy that is substantially confined to the volume to be heated and effects of dielectric heating of the formations. An important aspect
The disclosure describes a technique for uniform heating of relatively large blocks of hydrocarbonaceous formations in situ using radio frequency (RF) electrical energy that is substantially confined to the volume to be heated and effects of dielectric heating of the formations. An important aspect of the disclosure relates to the fact that certain hydrocarbonaceous earth formations, for example raw unheated oil shale, exhibit dielectric absorption characteristics in the radio frequency range. In accordance with the system of the invention, a plurality of conductors are inserted in the formations and bound a particular volume of the formations. The phrase “bounding a particular volume”is intended to mean that the volume is enclosed on at least two sides thereof. Electrical excitation is provided for establishing alternating electric fields in the volume. The frequency of the excitation is selected as a function of the dimensions of the volume so as to establish a substantially non-radiating electric field which is substantially confined in the volume. In this manner, volumetric dielectric heating of the formations will occur to effect approximately uniform controlled heating of the volume.
A system for in situ heat processing of hydrocarbonaceous earth formations, comprising a waveguide structure comprising a plurality of electrodes bounding a particular volume of earth formations as a dielectric medium bounded therein; and means for supplying electromagnetic energy to said wavegui
A system for in situ heat processing of hydrocarbonaceous earth formations, comprising a waveguide structure comprising a plurality of electrodes bounding a particular volume of earth formations as a dielectric medium bounded therein; and means for supplying electromagnetic energy to said waveguide structure at a frequency selected to dissipate said electromagnetic energy substantially only to said bounded medium thereby to substantially uniformly heat said bounded volume. A method for in situ heat processing of hydrocarbonaceous earth formations comprising the steps of: bounding a particular volume of earth formations with a waveguide structure comprising elongate electrodes having outer electrodes which are at approximately the same potential as the adjacent unbounded earth formations; and propagating electromagnetic energy through the waveguide structure in an aggregate mode of propagation generally parallel to the direction of an elongate axis of said electrodes, thereby substantially confining the electromagnetic energy in the waveguide structure and uniformly heating the bounded volume of earth formations.
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