Cement-rock interface subjected to scCO2

BARRIA, JC; D. MANZANAL; C. MARTIN; T. PIQUE; J.M. PEREIRA

Foz du Iguassu

Conferencia; Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering (ISRM 2019); 2019

AMSB

Storing CO2 in deep underground reservoirs has been an important progress inreducingpollution to the atmosphere and standing against climate change. The accumulated gas inthese reservoirs is in a supercritical state (scCO2) and in contact with the cement plug during its usefullife. Ordinary cement paste cannot stop the carbonation of the system and can lead into CO2 escapepaths to other reservoirs or to the surface in a short period of time. In view of this problem, a chemicaland microstructural characterization of modified cement with glass microspheres and bacterial nanocelluloseis presented. Using this data, we simulate the carbonation process in reservoir conditions witha chemo-poromechanical model implemented in a finite element code. Results show an increase inproperties of the modified cement samples in the experimental and simulation stages.