| 摘要 |
A method of electrically enhancing oil-recovery from an underground oil-bearing reservoir (3), comprising: (a) selecting an underground rock formation (2) comprising an oil-bearing reservoir (3); (b) positioning two or more electrically conductive elements (4, 5) at two or more spaced apart locations in proximity to said formation (2, 3), at least one of said conductive elements (4, 5) being disposed in or adjacent to a bore hole affording fluid communication between the interior of said bore hole and said formation; (c) imposing a controlled electrical charging potential between said two or more electrically conductive elements (4, 5) for a charging time sufficient to cause a capacitive charging of said formation to an operating charging potential; (d) lowering or maintaining said charging potential below 40 mV per running meter between said two or more electrically conductive elements (4, 5); and (e) withdrawing oil from at least one of said bore holes. |
