To facilitate the journey to net zero, carbon storage developers are crucial in ensuring CO2 containment confidence, with well integrity being a key factor. Poor well integrity can lead to leaks, halt operations, and impact revenue while complex remediation could render a project unfeasible. The SLB well integrity assessment workflow helps select the best site through a technical and economic analysis of existing wells. This workflow includes comprehensive data mining, screening, and ranking of existing wells, advanced barrier analysis, and enhanced quantitative leakage modeling. By utilizing this approach, developers can make informed recommendations, effectively address leakage risks, estimate associated costs, and assess project feasibility and economics. SLB, a leader in CCUS storage with over 135 projects, offers the expertise and services needed for CO2 storage—backed by over 100 years of experience in designing, constructing, and managing well integrity throughout a field's lifecycle.