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

Abstract

The escalating levels of carbon dioxide emissions (CO 2 ) 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 CO 2 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 (CO 2 ) injection. This article is a comprehensive review of multiple published papers exploring the enhancement of shale gas recovery through CO 2 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 CO 2 -EGR principle.