Shale formations have the potential to store a considerable amount of CO2 through gas adsorption in the shale matrix. This work aims to investigate the effects of total organic carbon content, pressure and temperature on adsorption capacity of Eagle Ford shales. This study involved the determination of void volume of two shale samples (EF A and EF B) with varying TOC and the determination of their CO2 adsorption capacity at varying pressure of 2 MPa - 10 MPa and varying temperature of 40°C and 60°C. The study employed a volumetric approach to examine the CO2 gas adsorption on shale samples. Results indicated that shales with higher TOC content have higher CO2 adsorption capacity, making shale formations with more organic matter to be potential candidates for CO2 storage. Overall, TOC, pressure and temperature played a significant role in CO2 adsorption capacity of the shale samples. Copyright © 2024, Offshore Technology Conference.