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o Number and arrangement

Well systems

o Number of wells, completion and workover methods, minimum well

spacing and well bay location

Hull compartmentalization

o Damage stability considerations

Air gap requirements

o New metocean criteria

As illustrated in the following figure 6.8, the relative hull responses of the

three designs vary considerably. In all cases the objective is to minimize the

response to the environment. Efficient design of floating structures is predicated on

functionality and performance – it should be capable of supporting all the

necessary equipment for production and related tasks while meeting all
performance criteria. The structure should provide sufficient space and robustness

to fulfill its intended purpose; also, the floating structure should be built at a
minimum of cost, which is governed mainly by the hull steel weight. Hull weight

estimates are based on global sizing which is determined by the naval architectural
and structural design. Global sizing is a key engineering design process in both the

concept selection stage and design phase of a floating structure. The sizing of a

moored floating structure considers relationships among the payload, the size of

the hull, and the mooring system.

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