Comparative Evaluation Of Disconnectable And Permanent Moorings For Fpsoâ??S In Harsh Environments

This paper discusses the factors that operators considering FPSO developments in harsh environments should evaluate when selecting between a permanent or disconnectable Single Point Mooring system. The paper first reviews the state of technology for both mooring types, focusing that must be considered in the selection and how each one can be addressed. These factors include mooring system size, green water, tanker hull longitudinal strength, system cost and schedule, reliability, safety, risks, to project schedule and cost, and risk of operating downtime. The sensitivity of mooring system feasibility, size and cost to water depth is quantified. The importance of obtaining input into the selection from the operator is emphasised.