Flame front control in underground combustion

Details Flame front control in underground combustion Flame front control in underground combustion

1979-06-06

1981-04-28

Novosad, Stephen J.

Wells

Processes

With indicating, testing, measuring or locating

166259, 299 2, E21B 43243, E21B 4710

Patent

active

042639697

ABSTRACT:
Disclosed is a method and apparatus for controlling flame front advance in underground combustion of hydrocarbonaceous material by passing an oxidizing gas into the combustion area comprising providing a plurality of gas removal means positioned so that gas can be removed in the direction of the desired flame front advance; detecting flame front position in the combustion area; selectively removing gas from the retorting area in response to the detected flame front position through one or more of the gas removal means; so that flow of gas to portions of the flame front can be controlled, thereby controlling the advance of portions of the flame front in the desired manner. This method is especially useful in the underground in situ retorting of oil shale.

REFERENCES:
patent: 3111986 (1963-11-01), Kuhn, Jr.
patent: 3138202 (1964-06-01), Ewing et al.
patent: 3499489 (1970-03-01), Parker
patent: 4047760 (1977-09-01), Ridley
patent: 4118070 (1978-10-01), French et al.
patent: 4120354 (1978-10-01), Ridley et al.
patent: 4162808 (1979-07-01), Kvapil et al.
patent: 4181361 (1980-01-01), Ridley et al.

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