Genesis Spar Risers: Interference Assessment and VIV Model Testing

摘要

Consideration of vortex-induced vibration (VIV) and riser interference for a deep water riser array presents a complex engineering problem which requires knowledge not only of the behaviour of single risers in open-water current, but also shielding and VIV effects unique to riser arrays. The Genesis SPAR, located in 2,600ft water depth in Green Canyon 205, accommodates a closely spaced array of drilling, production and export risers run from a central moonpool. This paper describes riser VIV model testing and outlines how riser interference was assessed using a combination of wake flow modelling, global interference analysis and VIV prediction, calibrated to model test results and CFD analysis.