Presented by:
Paul Verlaan Shell Global Solutions
Date:
Monday 6th November 2017 - 11:30 to 12:30
Venue:
INI Seminar Room 1
Abstract:
In this presentation, it will be described
which approach was taken to specify global and local ice loads for the
structures in two different oil & gas projects in sub-Artic areas: the
Sakhalin II project in the Sea of Okhotsk and the Kashagan project in NE
Caspian Sea. In both projects, the approach was a combination of deterministic
methods described in the different design codes, probabilistic methods and
scale tests in an ice tank. For the
Sakhalin II project, global ice loads were particularly relevant for the design
of the two multi-legged platforms (Piltun-B and Lunskoye-A). In contrast, in
the NE Caspian, an accurate determination of the global ice loads was mainly relevant
for design of the ice protection barriers rather than for design of the islands
itself. Instead, much more attention was paid to specifying the risk of ice
encroachment onto the islands. In all
cases, it was found that the limited amount of ice data often resulted in a
conservative design with still considerable uncertainties in the design loads.
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