Characterization of pozzolan-amended wellbore cement exposed to CO2 and H2S gas mixtures under geologic carbon storage conditions

- The effects of CO2 and H2S attack on pozzolan-amended wellbore cement under geologic carbon storage conditions are examined.
- Iron-rich particles from pozzolan additives make pozzolan-amended wellbore cement prone to H2S attack.
- 35 pozzolan vol% wellbore cement is more resistant to CO2 and H2S attack than 65 pozzolan vol% wellbore cement.
- CO2 and H2S alteration of pozzolan-amended wellbore cement does not indicate mechanical strength loss.