Enhanced oil recovery by in situ gasification

E - Fixed Constructions – 21 – B

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E21B 43/24 (2006.01) E21B 36/00 (2006.01) E21B 43/243 (2006.01)

Patent

CA 2410414

A process for in situ gasification of mineral oil in a subterranean formation comprises running a tool having a controllable thermal device therein from a surface production facility down to the subterranean formation, bringing said tool into operational proximity with the mineral oil in said subterranean formation, and activating the tool to operate the thermal device within a predetermined temperature range to generate gases or oily vapours from said mineral oil, which permits either an enhanced oil recovery (EOR) method with reduced water contamination, or a gas production process (GPP) which is useful in reducing environmental risks normally associated with transport of crude oil.

Cette invention se rapporte à un procédé de gazéification in situ de pétrole dans une formation souterraine, qui consiste à descendre un outil contenant un dispositif thermique réglable depuis une installation de production en surface jusqu'à la formation souterraine, à amener cet outil à proximité opérationnelle avec le pétrole se trouvant dans cette formation souterraine, et à mettre en marche cet outil pour actionner le dispositif thermique dans une plage de températures prédéterminée, afin de produire des gaz ou des vapeurs de pétrole depuis le pétrole contenu dans ladite formation, ce qui permet soit de mettre en oeuvre un procédé de récupération de pétrole améliorée (EOR) avec une contamination réduite de l'eau soit d'exécuter un processus de production de gaz (GPP) qui réduit les risques environnementaux normalement associés au transport de pétrole brut.

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