Method and device for the in-situ extraction of a...

E - Fixed Constructions – 21 – B

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E21B 43/24 (2006.01)

Patent

CA 2678473

The invention relates to a device for the in-situ extraction of a hydrocarbon-containing substance, while reducing the viscosity thereof, from an underground deposit (103), wherein the device comprises at least one injection pipeline (101) extending in the deposit (103) and at least one production pipeline (102) leading out of the deposit (103), which together form a so-called well pair. The injection pipeline (101) and the production pipeline (102) each have a starting region (501, 502) extending above ground in some areas, and an active region (503, 504) connecting to the starting region (501, 502) inside the deposit. With the method according to the invention, during a heating phase hot steam is applied to the injection pipeline (101) and the production pipeline (102), while during a production phase hot steam is applied only to the injection pipeline (101). Furthermore, the active region (503) of the injection pipeline (101) is additionally configured as an induction heater regarding the surrounding area in the deposit (103). The associated device is provided with appropriate means, wherein, for example, the well pair formed by the injection pipeline (101) and production pipeline (102) can be configured as electrodes.

L'invention concerne une installation d'extraction in situ d'un gisement souterrain (103) d'une substance contenant des hydrocarbures par réduction de sa viscosité, comprenant au moins un conduit d'injection (101) entrant dans le gisement (103) et au moins un conduit de production (102) sortant du gisement (103), ces conduits formant ensemble ce que l'on appelle une paire de puits. Le conduit d'injection (101) et le conduit de production (102) débouchent au-dessus d'une zone initiale développée en partie de manière aérienne (501, 502) et sur une zone active (503, 504) développée à l'intérieur du gisement contiguë à la zone initiale (501, 502). Selon le procédé de l'invention, le conduit d'injection (101) et le conduit de production (102) sont alimentés en vapeur surchauffée pendant une phase de chauffage, seul le conduit d'injection (101) est alimenté en vapeur surchauffée pendant une phase de production, la zone active (503) du conduit d'injection (101) étant en outre formée de manière additionnelle comme chauffage à induction relativement à son environnement dans le gisement (103). Des moyens correspondants sont disponibles pour le dispositif apparenté, la paire de puits constituée du conduit d'injection (101) et du conduit de production (102) pouvant être conçue comme des électrodes.

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