Volume 2 - Issue 2, March - April 2026

The interactions between brine and carbon dioxide (CO₂) at the fluid–rock interface play a critical role in controlling the distribution and migration of fluids within porous geological formations. These interactions—dominated by interfacial tension, wettability, capillary forces, and mass transfer— largely determine the efficiency and security of CO₂ sequestration in deep saline aquifers. Although considerable research has addressed CO₂ behavior in oil and gas reservoirs, limited experimental data exist on the interfacial properties specific to saline aquifer systems under reservoir conditions. In particular, reliable laboratory measurements of interfacial tension and wettability evolution are required to improve understanding of how pressure, temperature, and salinity influence CO₂–brine systems. Such data are essential for predicting multiphase flow behavior, assessing residual and structural trapping mechanisms, and ultimately evaluating the long-term storage capacity and stability of saline formations. This study provides experimental insights into brine–CO₂ interfacial properties under conditions representative of deep aquifers, with emphasis on the implications for reservoir petro physical behavior and carbon storage performance.

Adetokunbo FALADE, Adebayo, A.E, Kingsley OPUTE,"Investigating Petrophysics Effect of Co2 Injection and Sequestration in Carbonate Reservoir Rocks - A Reservoir Engineering/ Petroleum Geology Approach" International Journal of Advanced Multidisciplinary Research and Educational Development, V2(2): Page(884-899) Mar-Apr 2026. ISSN: 3107-6513. www.ijamred.com. Published by Scientific and Academic Research Publishing.