Publications

PT Pertamina Hulu Energi Offshore North-West Java (PHE ONWJ) presently has a fleet of 223 offshore platforms, with about 188 platforms are active in the production of oil and gas. The platforms in this fleet have installation dates ranging from 1970 to the present, however the majority of the platforms were installed in the 1970s and 80s. Recognizing the challenge to maintain this mature offshore facilities and the importance of structural integrity to ensure safe and reliable operation, PHE ONWJ has developed Risk-Based Structural Integrity Management (RBSIM) to optimize the underwater inspection, maintenance, and repair (IMR) strategy. By means of RBSIM approach, the valuable resources will be focused on the platforms “most at risk”. These most-at-risk platforms will have higher priority to be included in the IMR program than platforms with lower risk. Higher risk platforms will be inspected more frequently, using more detailed inspection surveys, whereas those platforms with lower risk ranking will have less frequent and less stringent inspections. Apart from optimization of underwater IMR strategy, RBSIM also provides means to justify and prioritize structural inspections and studies as part of life extension requirement and initiative for asset decommissioning. RBSIM process captures and review potential threats to the structural integrity which is posed by life extension such as: corrosion, overloading, operational changes, incidents, and fatigue. All of these steps are necessary to lengthen the life of an asset or demonstrate larger structural capacity beyond the original design values. The change management in the RBSIM along with the database system provides a better understanding of the current condition of the offshore platforms and enables PHE ONWJ as the asset owner to properly plan the decommissioning activities. Implementation of RBSIM provides PHE ONWJ a means to optimize the underwater IMR activities whilst maintaining and not sacrificing structural integrity. Keywords: Structural Integrity, Risk Based, Life Extension, Decommissioning