Technique for electrically heating formations

Details Technique for electrically heating formations Technique for electrically heating formations

E - Fixed Constructions

21

B

309/6

E21B 36/04 (2006.01)

Patent

CA 2021804

Abstract of the Disclosure A technique of heating a subterranean oil bearing formation comprises determining a thermal harmonic frequency of the formation and applying a form of alternating current to the formation that includes the thermal harmonic frequency to increase the temperature of the formation. Heated oil is produced from the formation. A standard three phase ac power source is converted to dc and then chopped to single phase ac so substantially all of the purchased power can be delivered to the well.

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