Risk Assessment of Fixed Offshore Jacket Platforms: A Persian Gulf Case Study

Offshore platforms are among important structures whose performance during their life-time and beyond is of significant importance. One of the approaches for ensuring a platform’s fitness-for-purpose condition is the structural integrity management system. In this process, a wide range of risk assessment approaches can be carried out to investigate the platforms’ performance. These assessments are divided into qualitative, semi-quantitative and quantitative methods, whose outcome is the risk level of the structure under investigation. By obtaining the risk level, the condition of the platform can be surveyed and certain actions can be defined to ensure that the platform remains fit-for- purpose. In this study, a fixed offshore jacket platform located in the phase 19 of the South Pars gas field in the Persian Gulf is investigated using a semi- quantitative risk assessment method. Based on certain assumptions, the risk level obtained for this platform can be categorized as intermediate. By knowing the risk level, risk mitigation actions can be carried out and inspection intervals can be defined.