Maximizing SAGD Performance at Blowdown Phase Through Autonomous Inflow Control Valves

Abstract Steam-Assisted Gravity Drainage (SAGD) remains a cornerstone technology for thermal recovery in heavy oil and bitumen reservoirs. As the projects mature, they enter the ramp-down and blowdown stages, where steam injection rates decrease, and reservoir pressure decline. During this late-life phase, non-condensable gas (NCG) and water breakthrough from thief-zones of aquifer connectivity can leave pockets of bitumen untouched, especially considering the emulsion viscosity changes that further complicate fluid mobility and inflow dynamics. This study integrates laboratory testing with reservoir simulation to evaluate the effectiveness of Autonomous Inflow Control Valves (AICVs) in managing late-life SAGD production challenges. The laboratory testing demonstrated the AICVs’ sensitivity to emulsion viscosity, water and NCG effectively choking or shutting off unwanted fluid entry. Complementary reservoir simulations showed reduced Water-Cut (WC) and enhanced oil recovery. The results highlight the potential of AICVs to mitigate late-life production issues, optimize fluid regulation, and extend the productive life of SAGD wells. This study establishes a framework for broader implementation of AICV technology in mature SAGD fields, offering a scalable and proactive solution to maximize recovery during the blowdown phase.