Automated MPD in SAGD well successfully navigates narrow-pressure window ///

By some industry estimates, up to 80% of Canada’s oil sands reserves are too deep to be mined, leaving in-situ production processes, such as steam-assisted gravity drainage (SAGD), as the only viable recovery options. The typical configuration for a SAGD operation involves drilling a pair of parallel horizontal wells, one slightly above the other. The upper well is the steam injector, in which pressurized steam is injected downhole to heat bitumen surrounding the wellbore, Fig. 1. This lowers the viscosity of the heavy oil, allowing it to flow via gravity to the lower well (the producer) and then be carried to surface.

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