First
template for Snøhvit
Posted: 01 June 2004
A new phase opened for Statoil's Snøhvit development in
the Barents Sea on 31 May when installation of the first subsea
template began.
This structure is one of six due to be placed over the coming month
on the Snøhvit and Albatross fields, 140 kilometres off Hammerfest
in northern Norway.
Four of these are templates, each with four well slots. In addition
come a control distribution system, which allocates power, control
signals and chemicals, and a pipeline end manifold.
The latter will provide the connection point between flowlines
from the templates and the main pipeline to the land-based plant
at Melkøya outside Hammerfest.
Aker Marine Contractors is responsible for doing the installation
work in 250-300 metres of water from the new BOA Deep C multipurpose
vessel.
Fabricated by ABB at the Nymo yard in south-east Norway, each of
the templates will be lifted from a transport barge at the Polar
Base east of Hammerfest.
It will then be lowered into the sea at the aft of the ship, and
kept floating about 100 metres beneath the vessel with the aid of
a pennant buoy attached to the ship.
The next stage is to tow each template individually out to the
field for controlled submersion until the unit sits on the seabed.
"We're pleased to have got these operations under way and
want to achieve the best possible result," says Siv Skadsem,
project manager for subsea installations on Snøhvit.
"These are the first offshore installations in the Barents
Sea, and in that respect represent a milestone."
In addition to the subsea units, Snøhvit is being developed
with a pipeline to land and a gas processing and liquefaction plant
at Melkøya.
This gas and condensate field is the first development in the Norwegian
sector of the Barents Sea, and the first in Europe based on gas
liquefaction.
For more information see www.statoil.com
Posted by Richard Price,
Editor Pipeline Magazine
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