Analysis of Reservoir Fluid Migration in the Process of CO2 Sequestration in a Partially Depleted Gas Reservoir

This paper addresses problems of reservoir fluid migrations in the process CO2 sequestration a partially depleted petroleum reservoir. A detailed analysis is required to obtain fundamental characteristics structure, including estimation its capacity and leakage risks. The presents general discussion relevant mechanisms their contributions analysed issues. proposed approach solve relies on usage numerical structure modelling simulations processes models structure. It applied selected geological comprising gas includes key types migrations: viscous multiphase transport convection transport. also takes into account other phenomena that affect injected solubility formation water trapping by capillary forces. Correspondingly, risks are associated with distinct pathways (beyond structural trap, caprock, via activated fractures). All these cases separately modelled presented discussed. final results consequences for events discussed some generalized conclusions drawn from employed study.