Cement-rock interface subjected to SCCO2

JUAN CRUZ BARRIA; DIEGO MANZANAL; CHRISTIAN MARCELO MARTIN; PIQUÉ, TERESA MARÍA; JEAN MICHEL PEREIRA

Congreso; 14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019, 2020, pp. 3196?3203; 2019

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