Review on Carbon Capture, Utilization, and Storage for Enhancing Gas Recovery

The escalating levels of carbon dioxide emissions (CO2) and the detrimental consequences of global warming have spurred extensive research into identifying secure and reliable storage sites with ample capacity. Depleted gas reservoirs emerge as a promising option for CO2 sequestration, solidifying their position as a viable carbon sink. These conventional or unconventional reservoirs retain substantial pore space after natural gas extraction and depressurization. Furthermore, their impermeable top layers ensure the long-term containment of hydrocarbons, enhancing the safety of this choice. Consequently, the cost of the process can be reduced through the incremental recapture of excess gas after carbon dioxide (CO2) injection. This article is a comprehensive review of multiple published papers exploring the enhancement of shale gas recovery through CO2 injection. It aims to present a thorough understanding of the concept of this technology, highlighting its benefits and drawbacks, comparing existing studies, and encouraging further research into the CO2-EGR principle.