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This paper presents the application, to a synthetic example, of a formulation im- plemented in a finite element code CODE_BRIGHT to simulate fluid flow in petroleum reser- voir sensitive to stress state. In this program the equations of fluid flow problem are solved together with the stress equilibrium equation, which characterize the geomechanical problem. It's a hydro-geomechanical coupling solved in a totally implicit manner, where changes in pressure field induce changes in stress state of rocks of the field, which can lead to reactiva- tion of sealed geological faults. The fault reactivation problem considers that shear (with dilatancy), tension or compression of filling material may cause changes in hydraulic proper- ties. The mechanical constitutive model adopted to represent the behavior of the filling mate- rial of the fault is an elastoplastic Mohr-Coulomb model that is able to reproduce the fault activation through reservoir and adjacent rocks (fluid and pressure propagation).

MODELLING FLUID FLOW IN STRESS SENSITIVE PETROLEUM RESERVOIR CONSIDERING FAULT REACTIVATION PROBLEM