Simulation of Geomechanical Reservoir Behavior during SAGD Process Using COMSOL Multiphysics®
THM (Thermo-Hydro-Mechanical) behavior of the reservoir during SAGD (Steam-Assistant-Gravity-Drainage) was studied through a proper constitutive modeling of the porous media. Specifically, a generalized density-stress-fabric dependent elasto-plastic model with stress-dilatancy and plastic damage as main ingredients was implemented into COMSOL Multiphysics®, to model geomechanical behavior during SAGD process.
The present study shows that interesting failure patterns in the form of strain localization can be captured in a reservoir within a multiphase flow analysis coupled with an advanced elasto-plastic model with density-stress-fabric dependencies. Such a failure analysis performed as a coupled multiphysics problem in COMSOL provides insights that will help optimizing the SAGD process.