Enhancing CO2-H2S Storage Predictions in High H2S Fields: Improving Model Accuracy and Kinetic Rate Information

In the context of carbon capture and storage (CCS), the presence of impurities, such as Hydrogen Sulfide (H2S), in the injected Carbon Dioxide (CO2) stream poses a significant challenge (Bennion and Bachu, 2008). This challenge is particularly pronounced in carbonate reservoirs due to the potential precipitation of the minerals (Ahmad et al., 2023). Such precipitation can have detrimental effects on carbonate rock properties, including a reduction in rock porosity and permeability (Labus & Suchodolska, 2017; Clark et al., 2018). Ultimately, these changes can impact injectivity and storage capacity (Wang et al., 2012; (Zaidin et al., 2018), making it essential to comprehend the geochemical reactions involved, which are demonstrated as follows: