Wellbore stability analysis during CO2 injection considering elastoplastic and continuous damage effects

A double porosity finite element model (FEM) is used to analyse the stability of a wellbore during carbon dioxide (CO2) injection in a carbon capture and storage (CCS) scheme. Elastoplastic deformation and continuous damage effects were considered. Attention was given to the pore and fissure pressures of the rock sur-rounding the wellbore as these can create stresses which can lead to potential fracturing. The size of the wellbore was also discussed as well as the studied depth and the different injection pressures of CO2