Recovery of hydrocarbons using electrical stimulation

Details Recovery of hydrocarbons using electrical stimulation Recovery of hydrocarbons using electrical stimulation

E - Fixed Constructions

21

B

E21B 43/24 (2006.01) E21B 36/04 (2006.01) E21B 43/25 (2006.01)

Patent

CA 2560223

A method of recovering hydrocarbon such as heavy oil or bitumen from an underground oil-rich reservoir formation such as oil sand or oil shale is provided. One or more substantially vertical wells are drilled into the formation so that the bottom portion of each well extends into the formation and, preferably, below the bottom of the formation. The bottom portion of each well may be enlarged relative to the rest of the well. The bottom portion of the well is substantially filled with conductive liquid, sealed at the surface and high voltage power of up to 72,000 Volts or more is applied via an electrical conductor having an electrode submerged in the conductive liquid. The resulting current flow increases the formation temperature, causing the heavy oil or bitumen to flow from the formation into the bottom portion where it can be removed from the well.

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