Diluent-enhanced in-situ combustion hydrocarbon recovery...

E - Fixed Constructions – 21 – B

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E21B 43/243 (2006.01) E21B 43/00 (2006.01)

Patent

CA 2643739

A modified process for recovering oil from an underground reservoir using the toe-to-heel in situ combustion process. A diluent, namely a hydrocarbon condensate, is injected within a horizontal weltbore portion, preferably proximate the toe, of a vertical-horizontal well pair, or alternatively into an adjacent injection well, or both, to increase mobility of oil.

Cette invention concerne un procédé modifié permettant de récupérer du pétrole à partir d'un réservoir souterrain au moyen d'un procédé de combustion sur site à l'aide d'un dispositif horizontal et vertical. Un diluant, plus précisément un condensat d'hydrocarbures, est injecté dans une partie du trou de forage horizontal, de préférence, à proximité de la partie avant, d'un ensemble puits horizontal-puits vertical, ou, dans un mode de réalisation différent, dans un puits d'injection adjacent, ou les deux, afin d'améliorer la mobilité du pétrole.

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