Electrochemical process for effecting redox-enhanced oil...

E - Fixed Constructions – 21 – B

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E21B 43/16 (2006.01) E21B 43/24 (2006.01)

Patent

CA 2464669

A method is provided for recovering oil from a subterranean oil-bearing formation. One or more pairs of electrodes are inserted into the ground in proximity to a body of oil in said formation. A voltage difference is then established between the electrodes to create an electric field in the oil- bearing formation. As voltage is applied, the current is manipulated to induce oxidation and reduction reactions in components of the oil. The oxidation and reduction reactions lower the viscosity in the oil and thereby reduce capillary resistance to oil flow so that the oil can be removed at an extraction well.

Cette invention concerne un procédé permettant d'extraire du pétrole dans une formation souterraine pétrolifère. Ce procédé consiste à insérer une ou plusieurs paires d'électrodes dans le sol à proximité d'une formation pétrolifère. On crée ensuite une tension entre les électrodes de manière à produire un champ électrique dans la formation pétrolifère. Pendant l'application de la tension, on manipule le courant pour induire des réactions d'oxydation et de réduction dans les composants de pétrole. Ces réactions d'oxydo-réduction ont pour effet d'abaisser la viscosité du pétrole et, par là même la résistance capillaire à l'écoulement du pétrole, lequel peut être extrait par un puits d'extraction.

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