Offshore Platform Decommissioning Option Analysis Using the AnalyticHierarchy Process (AHP) Method: A Comparative Study of OnshoreDisposal (OD) and Carbon Capture Hub (CCH)

Abstract

This study evaluates offshore platform decommissioning options, comparing Onshore Disposal (OD) withrepurposing as a Carbon Capture Hub (CCH). OD involves high costs and environmental risks due tothe transportation of materials and waste handling. CCH offers a sustainable alternative by repurposingplatforms for long-term carbon sequestration, aligning with global sustainability goals. The AnalyticHierarchy Process (AHP) is used to assess OD and CCH based on platform type, weight management,logistical requirements, and structural integrity. Expert surveys and pairwise comparisons are conducted.The priority weights are derived using the Row Geometric Mean Method (RGMM) and Weighted GeometricMean Method (WGMM), while Geometric Consistency Index (GCI) is used to verify the consistency.Results indicate that Logistic Requirement is the most critical factor, followed by Platform Type andStructural Integrity. AHP rankings show that CCH (0.5736) is the preferred option over OD (0.4264). CCHminimizes environmental impact, optimizes infrastructure reuse, and aligns with regulatory frameworksfor carbon capture and storage. This study provides a structured decision-making framework for offshoreplatform decommissioning. Findings confirm CCH as a viable alternative, offering long-term environmentaland economic benefits over OD. Future research should validate structural feasibility and explore integrationwith renewable energy solutions.