In situ oil shale process

Details In situ oil shale process In situ oil shale process

E - Fixed Constructions

21

B

196/14, 166/35

E21B 43/00 (2006.01)

Patent

CA 1199573

ABSTRACT The method and improvement for recovery of hydrocarbons in situ from subterranean oil shale formations is disclosed by forming generally horizontal electrodes from the injection of molten metal into preheated or unheated fractures of the formation. A nonconductive spacing material is positioned in the casing of the bore hole between the electrodes. A fracture horizontally intermediate between the metallic electrodes is propped with a nonconductive granular material. Unterminated standing waves from a radio frequency (R.F.) generator are passed between the electrodes so as to heat the oil shale formation. The hydrocarbons in the formation are vaporized and are recovered at the surface by their migration through the intermediate fracture and tubing. By this method radial metallic electrodes can be formed at various depths throughout a subterranean oil shale formation so as to vaporize the hydrocarbons contained within the oil shale formation.

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