Longitude were contracted by Petrofac RNZ and Petronas to provide the full range of naval architecture and structural engineering service for the FEED study of MOPU Saparmyrat Turkmenbashi and Oguzhan FSO decommissioning.
Facts and Figures:
- SBM Offshore and Gusto MSC Jackup and FSO design
- Spud Can Jackup
- Limited marine spread and lifting capacity on site
- ABS Class
Longitude’s Scope of Work
The West Diyarbekir field in Caspian Sea, offshore Turkmenistan is operated by Petronas Carigali Turkmenistan Sdn Bhd. Both were constructed in 2005 and commissioned in 2006. Due to approaching classification expiry & economic life of the field, PC(T)SB planned for FEED study of decommissioning of the MOPU and FSO including the flowlines in the most economical and safe manner.
Longitude Engineering Pte. Ltd. (“Longitude”) was contracted by Petrofac RNZ for the provision of FEED Naval Architecture and Structural Engineering services for this scope of work. This work required multi-discipline expertise, demonstrating the capability to provide a full range of engineering and consultancy services for Decommissioning of Fixed and Floating Offshore Production Units.
Longitude performed the following activities in the following key areas:
• Survey conducted onboard the MOPU and FSO to assess weight changes/condition of tow equipment and identify modifications.
• Preparation of method statement and procedures for
• decommissioning options
• Definition of the environmental design criteria for marine operations involved in demobilisation of assets and flowlines
• Preparation of engineering analyses to determine weight to be offloaded from rig
• Prepare engineering analysis for removal of assets from field and transportation
• Define and outline the parameters and procedure for demobilisation of assets from field
• Prepare engineering analysis and procedures to disconnect and retrieve flowlines
• Provide and coordinate jacking inspection services through a subcontractor to inspect the jacking system and identify spares and repairs to be performed
• Provide and coordinate geotechnical engineering services through subcontractor to determine soil resistance force during pull out of spud cans/mooring anchor piles
• Oversee and coordinate multidisciplinary engineering procedures and results to ensure consistency and project requirements are met