Almukainah et al. (2025): Effects of Long-Term CO₂ Storage on Carbonate Rock Stability
Hani Almukainah, Abdulameer Almalichy, Mohamed Mahmoud, Murtada Saleh Aljawad, Ahmed Farid Ibrahim, Mustafa Al-Ramadan, Ahmed Al-Yaseri, IN: Energy & Fuels, https://doi.org/10.1021/acs.energyfuels.5c01974
Carbon geostorage (CGS) is a proven technique for reducing anthropogenic CO₂ emissions and mitigating global warming by injecting CO₂ into deep geologic formations like saline aquifers or reservoirs. However, long-term exposure to CO₂-rich brine can alter the petrophysical properties and impact the storage integrity. This study examines the impact of CO₂ sequestration on the limestone core sample integrity, focusing on porosity, wormhole formation, and geometric tortuosity. Four limestone samples of 1.5-in. in diameter and 3-in. in length were aged in live brine at 60 °C and 2000 psi for 60 days to simulate sequestration conditions.