1971 – The Frigg gas field is discovered
in April, spanning the border of the Norwegian and British
sectors of the North Sea. It was one of the largest offshore
gas fields in the world and was named after the Norse
goddess of fertility.
1974 – Construction
of the Frigg Transportation System, the twin 32 inch
(81.3 centimetre) pipelines from the Frigg Field
to St Fergus, begins. Pipeline 1, the Frigg UK pipeline,
carries gas from the British sector and is owned
by British interests; Pipeline 2, the Frigg Norwegian
pipeline (now Vesterled), carries gas from the Norwegian
sector and is owned by the Norwegian interests.
of the 32" pipeline leaving one of the pipe laying
1976 - The Frigg Treaty (the Unitisation agreement) between
Norway and Britain, is signed on 10 May. It is the
first international treaty of its kind for the production
of offshore hydrocarbons.
MCP-01 is installed. The platform is towed into position
by tug boat from the construction site at Stromstad in
leaving the construction site, 1976
1977 – Pipeline
laying is completed in the summer. The University of
Aberdeen assists in restoring the sand dunes, disturbed
during the pipe laying process, to minimise ecological
The monitoring of the
environment is ongoing. Phase 1 construction of the St
Fergus Terminal begins. The first gas arrives at the
terminal on 13 September after a successful test two
MCP-01 becomes operational in September when gas from
the UK facilities of the Frigg Field began flowing through
the Frigg UK pipeline.
welding a section of the 32" pipeline underwater
1978 – Phase
2 construction of the St Fergus Terminal begins. On completion,
it covers 178 acres. The Queen inaugurates the St Fergus
Terminal on 9th May. Gas from the Norwegian facilities
of the Frigg Field starts to flow in the Frigg pipeline
1982 – The
installation of compression facilities on MCP-01
begins. Once operational, they increase the capacity
of the pipeline between MCP-01 and the terminal,
meaning more gas is delivered to St Fergus.
Construction work to expand the facilities
begins at St Fergus, including a sixth process stream,
a fifth condensate tank, new metering facilities and
additional pressure control valves.
crane being lifted onto MCP-01
1983 – The
compressors, then the largest installed in the North
Sea, become operational in October
1987 – Gas
compression facilities are taken out of service on
MCP-01. Phase 3 construction of the St Fergus Terminal
begins; it begins receiving gas from the Alwyn Field.
1991 – St
Fergus begins receiving gas from the Miller field
1992 – MCP-01
converts to ‘not normally manned’ (NNM),
and operations are controlled remotely from St Fergus.
1993 – St
Fergus begins receiving gas from the Bruce Field
2001 – The
Norwegian Heimdal platform is connected to the Frigg
Norwegian pipeline (Pipeline 2). After the work is
completed, Pipeline 2 and the Norwegian facilities
at St Fergus become part of the Vesterled gas transportation
Transportation System before the bypass at MCP-01
2003 - Ownership of the Vesterled system passes to
Gassled (a joint venture between oil and gas companies
on the Norwegian Continental Shelf) with Gassco as operator.
2004 – Frigg
Field ceases production. The decommissioning process
of MCP-01 begins and consultations with stakeholders
Frigg UK pipeline is rerouted to bypass MCP-01, enabling
the Frigg UK pipeline formerly leading through the
base of the platform to remain in use after MCP-01
has been decommissioned.
The 24” pipeline
from Alwyn is bypassed from Frigg with a direct subsea
connection to the 32” Frigg UK pipeline.
Major engineering works bypassing the
pipes to MCP-01 are started, enabling the Frigg UK pipeline
formerly leading through the base of the platform to
remain in use after MCP-01 has been decommissioned.
2005 – Similar
bypass work is carried out at MCP-01 on the Vesterled
2006 – Removal
of MCP-01 topside facilities begins.