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Asgard Transport Project (Holme et al. (1999))
26.2 Asgard Flowlines Project
26.2.1 General
The Asgard Field is located at a water depth of approximately 320 meters in the Haltenbanken
area in the Norwegian sector of the North Sea. The field consists of the Smpcrbukk, Smpcrbukk
S@r and the Midgard fields. JP Kenny AIS was commissioned by Statoil and Saga Petroleum
to perform conceptual and detailed engineering of all infield Flowlines and riser bases.
In total, approximately 300 km of infield flowlines will be installed, ranging in sizes from 10-
inch to 20-inch. The design life of the flowlines is 20 years. The 10-inch production flowlines,
which are thermally insulated, are to be designed for the wellhead shut in pressure of up to
390 barg and a design temperature of up to 145' C. The seabed in the area, which consists
mainly of soft clay, is extremely uneven with a large number of iceberg scars and pockmarks.
Although the field is not considered a primary trawlboard fishing area, some trawl activities
have been reported. Interference with trawl fishing equipment therefore had to be considered
in the design.
26.2.2 Challenges and Engineering Innovations
The main challenges associated with the design of the Flowlines are summarized in the
following:
