A comprehensive review of factors affecting wellbore integrity in CO2 injection wells
Faysal Ahammad, Saman Azadbakht
Abstract
The preservation of the integrity of CO 2 injection wells holds immense significance for the efficacy of Carbon Capture and Storage (CCS) projects. This is attributable to the fact that a wellbore exhibiting robust mechanical and flow integrity substantially diminishes the likelihood of CO 2 leakage into the overlying aquifer or release to the atmosphere, thereby curtailing associated risks. Given the potential hazards and repercussions stemming from the failure of CO 2 injection wells, encompassing environmental catastrophes, financial implications, and health risks, it is imperative to earnestly address these challenges through adept management and monitoring protocols. This study aims to advance the current understanding and enhance the management of wellbore integrity issues in CO 2 injection wells. Accordingly, this review paper undertakes a thorough exploration of the primary factors influencing wellbore integrity in CO 2 injection wells. Furthermore, it delineates a pressing necessity for more exhaustive investigations regarding the influence of CO 2 injection rate, CO 2 purity, and wellbore geometry on wellbore integrity. • Factors influencing the integrity of CO 2 injection wells were reviewed. • Limited research is available on the impact of CO 2 injection rate and CO 2 purity on wellbore integrity. • No research has yet addressed the effect of wellbore geometry.