| 摘要 |
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 t he 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 i s 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 b e removed from the well.
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