Geochemical Modeling of Mineral Alteration Due to the Presence of Sulfur Dioxide in the Geological Storage of CO2

Chemical effects of sulfur dioxide co-injection with carbon dioxide on the reservoir and caprock mineralogy and permeability in depleted gas fields

“…On the other hand, an increase in the weight percentage of anhydrite reduces this ratio due to the dominance of anhydrite precipitation over dissolution of carbonate minerals. Our results are in agreement with previous studies by Waldmann et al (2013) and Bacon et al (2009) who also observed anhydrite precipitation.…”

“…The specific question can be formulated as follows: what type and quantity of impurities can be left in the injected CO 2 in order to reduce the cost of capture without affecting the integrity of storage system? Different modeling studies have been performed to evaluate various aspects of impurities co-injection in geological formations (Waldmann et al, 2013;Parkhurst and Appelo, 2013;Koenen et al, 2011;Xu et al, 2007). Waldmann et al (2013) used PHREEQC (Parkhurst and Appelo, 2013) software and modeled CO 2 and SO 2 co-injection into Triassic Buntsandstein.…”

“…Different modeling studies have been performed to evaluate various aspects of impurities co-injection in geological formations (Waldmann et al, 2013;Parkhurst and Appelo, 2013;Koenen et al, 2011;Xu et al, 2007). Waldmann et al (2013) used PHREEQC (Parkhurst and Appelo, 2013) software and modeled CO 2 and SO 2 co-injection into Triassic Buntsandstein. The results revealed an enhanced level of K-feldspar dissolution next to anhydrite precipitation.…”