In-situ production of bitumen

E - Fixed Constructions – 21 – B

Patent

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E21B 43/243 (2006.01) E21B 43/24 (2006.01) E21B 43/30 (2006.01)

Patent

CA 2252192

A system for in-situ production of bitumen comprises a steam injection well system (4) which comprises a number of lateral sections (10) that traverse the bitumen bearing formation (14) partly above a basal water transition and/or thief zone (15) such that a tip (17) of each lateral section (10) protrudes from the bitumen bearing formation (14) into the basal water transition and/or thief zone (15). The steam that initially flows via said tips (17) into the basal water transition and/or thief zone (15) promotes a rapid steam chamber growth into the bitumen bearing formation (14) and a quick mobilization and recovery of bitumen.

Cette invention concerne un système de production in situ de bitume qui comprend un puits d'injection de vapeur (4) comportant un certain nombre de sections latérales (10) qui se prolongent dans la formation bitumineuse (14) en partie au-dessus de la zone de transition à la couche aquifère et/ou de la formation poreuse fissurée (15) de telle sorte que la pointe (17) de chaque section latérale (10) pénètre de la formation bitumineuse dans ladite zone de transition à la couche aquifère et/ou formation poreuse fissurée (15). La vapeur injectée par lesdites pointes (17) dans ladite zone (15) favorise la croissance rapide d'une chambre d'accumulation de vapeur dans la formation bitumineuse (14) et la mobilisation et l'extraction rapides du bitume.

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