A Comparative Study of Reactive Transport Modelling Using ToughReact and MoReS for Modelling CO2 Sequestration

The goal of this work is to simulate CO2 storage in a deep saline aquifer case that is currently considered for field injection. Results of RTM are obtained using both TOUGHREACT and the in-house Shell reservoir simulator MoReS, which was recently coupled with the geochemical software PHREEQC. The obtained results are very similar when the same geochemical database and input parameters are used. Small changes in porosity, up to a maximum of 0.003, are computed as a result of dissolution and precipitation reactions. Benchmarking of simulation software is important for quality control and confidence in obtained results.