Method for monitoring subsurface combustion and gasification pro

Details Method for monitoring subsurface combustion and gasification pro Method for monitoring subsurface combustion and gasification pro

1979-07-25

1981-06-30

Novosad, Stephen J.

Wells

Processes

With indicating, testing, measuring or locating

166 64, 166 65R, 166248, E21B 43243, E21B 4700

Patent

active

042757878

ABSTRACT:
A method for determining the location of a combustion front during subsurface combustion and gasification in a coal seam and of a change of electrical properties of the coal includes emitting radar signals from an elongated antenna. The antenna is located in a borehole within the coal seam. The radar signals are received and recorded for a determination of their travel time and amplitude.

REFERENCES:
patent: 2800183 (1957-07-01), Jenkins
patent: 3775073 (1973-11-01), Rhoades
patent: 4019577 (1977-04-01), Fitch et al.
patent: 4120354 (1978-10-01), Ridley et al.
patent: 4130164 (1978-12-01), Datta
patent: 4140180 (1979-02-01), Bridges et al.
patent: 4167213 (1979-09-01), Stoltz et al.
Feder, "Infrared Sensing: New Way to Track Thermal Flood Fronts", World Oil, Apr. 1967, pp. 142, 145, 146, 149.

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