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10 August 2015

Based on the ongoing success of Delmar Systems’ temporary replacement mooring system for ExxonMobil’s Serpentina FPSO offshore Equatorial Guinea, ExxonMobil contracted Delmar Systems to develop the temporary emergency moorings for both FPSO Mondo and FPSO Saxi offshore Angola in the Kizomba C field.

Delmar Systems designed and specified the replacement mooring lines and components for a single mooring cluster replacement. These were optimized for the highest level of survivability for sudden squall storm events while maintaining the allowable production riser offset limits. Fully coupled time domain dynamic analyses were performed to verify the survivability in sudden site specific squall storm events. Site-specific geotechnical analysis of the OMNI-Max anchors were performed to verify installation penetrations and holding capacity in the Kizomba C field soils.

Delmar Systems procured the specified equipment for each mooring line and mobilized the equipment for shipment to SBM’s base in Angola. Installation engineering was performed to develop the detailed installation procedures for the OMNIMax anchor installation, pre-installation of the mooring lines, and hook-up to the FPSO top chain at the turret padeyes. The installation methodology was tailored to utilize existing Anchor Handling Tugs already on long term contract in field as well as limitations of the FPSO turret pull-in winch.

• Emergency Replacement Mooring Design
• Squall Time Domain Analysis for FPSO
• OMNI-Max Anchor
• Equipment Specification and Procurement / Mobilization


Year: 2015
Location: Angola, West Africa
Water Depth: 2,362ft / 720m