Objective
The aim of the project is to develop a concept for oil and gas production in 400 m of water depth based on a concrete platform with modular construction and specific assembly methods in order to cope with existing construction site.
The conceptual design phase has demonstrated the feasibility of the concept from structural, construction-installation and operational view points.
Between the two phases, an optimization study was conducted to reduce concrete quantities thanks to lighter designs (hexagonal basement, 3 concrete legs only in a dock and suppression of the assembly procedure in horizontal floating position)
Detail study of the second phase has been forcusing on structural analysis by finite elements for sensitive parts and calculation under seismic conditions according to Norwegian standards.
The resulting structure looks like a stack of several elementary conventional concrete platforms having 3 or 4 columns each. The elementary structures are built in a conventional way. The major innovation consists of the assembly method between the different elementary structures. Each structure is tilted from vertical to horizontal by differential ballasting. When two elementary structures are horizontal, they are approached and connected. Specific devices and procedures have been developed during the first phase of this study. When the complete structure is achieved, it is towed to side in either the vertical or the horizontal position. Norwegian companies took part in the activities as subcontractors.
Programme(s)
Topic(s)
Call for proposal
Data not availableFunding Scheme
DEM - Demonstration contractsCoordinator
94588 Rungis
France