In situ radio frequency selective heating system
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United States of America Patent
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-
Jul 3, 1984
Issued Date -
N/A
app pub date -
Aug 10, 1981
filing date -
Dec 7, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The process and apparatus for extracting the products of kerogen in situ from an oil shale body by supplying energy selectively to the kerogen by high frequency electric fields in the frequency range between 100 kilohertz and 1000 megahertz at an intensity which heats the kerogen to a temperature range between 250.degree. C. and 500.degree. C. to allow pyrolysis of the kerogen prior to substantial heat transfer to the surrounding mineral portions of the oil shale. A plurality of groups of spaced radiators produce the electric fields for heating the kerogen. A dipole radiator in the subsurface formation is supplied with electromagnetic energy through a transmission line from an energy generator on the surface.
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