AMOG was a key member of the a Concept Phase Joint Study Team (in the Gulf of Mexico in the USA), evaluating Floating System concepts in water depths of 1,300 m and 1,900 m. AMOG was responsible for the interfaces with the riser/flow assurance, subsea and topside engineers.

The project involved studies focussed on minimum facilities requirements for low side reserves cases, as well as execution plans, weight estimates, installation programs and the development of cost and schedule estimates.

AMOG managed the detailed TLP design study, focussing on tendon design and fatigue for Seastar units in 1,370 m to 1,800 m water depths. The study included topside facilities layout, payloads, hull sizing including weight breakdown of major hull components, load case selection, air gap calculations, global analysis, riser attachment point motion calculations, tendon analysis (strength and full fatigue analysis), substructure design description with hydrostatics and compartmentalization and foundation design.

AMOG also managed the preliminary deep draft semisubmersible FPU hull and mooring system design study focusing on FPUs in 1,370 m to 1,800 m water depths.

Cost effective integration of the topsides into the FPU hull was investigated. Different hull/topside module configurations were assessed including skid mounted, wave zone truss, module support frame and integrated deck box structures. FPU hull sizing and preliminary global strength assessments were conducted. Hull motion analysis was performed to demonstrate that vertical motions at SCR hang-off locations were within allowable limits. Air gap assessments were performed. Mooring system analyses conducted to account for the highly asymmetric SCR layout.