Perpustakaan Digital ITB

This study research about Carbon Capture and Storage (CCS) has emerged as one of the most promising technologies to reduce greenhouse gas emissions and achieve net-zero targets. Among the various trapping mechanisms in geological formations, solubility trapping offers a medium- to long-term method of securing CO? by allowing it to dissolve into formation brine, thereby reducing the potential for leakage. This study focuses on evaluating the behavior and performance of the solubility trapping mechanism in the Utsira Formation at the Sleipner Field, Norway a globally recognized CCS site. The reservoir model was constructed to resemble the actual field, followed by dynamic simulations of CO? injection over a 20-year period and a post-injection monitoring phase. This study evaluates seven different scenarios to observe the effect of impurities in the form of methane gas (CH?) and sodium chloride (NaCl) salt on CO? storage efficiency. The scenarios include a basecase (no impurities), three variations of CH? content, and three variations of salinity levels. The results indicate that solubility trapping is significantly reduced with increasing levels of CH?, due to the dilution of pure CO? and the thermodynamic effects on phase behavior. Similarly, high salinity reduces CO? solubility due to the salting-out effect. Nevertheless, structural and residual trapping mechanisms continue to contribute meaningfully to total CO? storage. The study underscores the importance of considering fluid impurities and salinity in designing and optimizing CCS projects to ensure maximum storage security and performance.