Impacts of CO2 perturbation on well composite samples: experiments and numerical simulations

Abandonned wells in the depleted reservoirs envisaged to host CO2 geological storages are the main possible leakage pathways of CO2 towards shallow aquifers. Then, for impact assesment, the alteration of well materials with CO2 in the reservoir conditions requires to be characterized. Here, the interaction of a composite well sample - formed of steel casing, surrounded by Portland cement, itself surrounded by sandstone - with wet CO2 and...