The Troll field is the world's biggest subsea development with regards to the number of subsea wells. operated by Statoil. The Troll start production on 1995, which located in the northern part of the North Sea, approximately 65 kilometres west of Kollsnes, near Bergen in Norway.
The Troll Field history:
1986 - Norske Shell was responsible for the first gas development phase on Troll, which received a green light from the Norwegian parliament.
1995 - Troll B entered production
1996 - Statoil took over as operator for Troll Gas from Norske Shell
1996 - Contractual gas deliveries began flowing from the field to continental Europe under the Troll gas sales agreements via the Zeepipe Gas Pipeline
2002 - ABB win contract for power system and compression module
2008 - Aibel wins a contract for new living quarters modules for Troll A platform
2012 - Temporary shutdown of Troll C
2014 - Compression modules added to Troll A
The Troll Platform Dimensions
The Troll A platform has an overall height of 472 metres (1,549 ft), weighs 683,600 tons (1,2 million tons with ballast) and has the distinction of being the tallest structure ever moved by mankind.
The platform stands on the sea floor 303 metres (994 feet) below the surface of the sea and one of the continuous-slip-formed concrete cylindrical legs (the leg containing the import and export risers) has an elevator that takes over nine minutes to travel from the platform above the waves to the sea floor.
The walls of Troll A's legs are over 1 metre thick made of steel reinforced concrete formed in one continuous pour (See Slip forming) and each is a mathematically joined composite of several conical cylinders that flares out smoothly to greater diameters at both the top and bottom, so each support is somewhat wasp-waisted viewed in profile and circular in any cross-section (see picture at right).
The concrete legs must be able to withstand intense pressure so are built using a continuous flow of concrete, a lengthy process that takes 20 minutes per 5 cm laid.
The field contains 40 per cent of the total gas reserves on the Norwegian continental shelf and is also one of the largest oil fields on the continental shelf.
The Troll field is the world's biggest subsea development with regards to the number of subsea wells.
The Troll A concrete deepwater structure is the world’s largest natural gas production platform at 473 meters tall and weighing 1.2 million tons.
It is also the tallest structure ever to be moved by mankind.
At peak production the field produced 400,000 bpd
Gas is delivered to Belgium via the Zeepipe Gas Pipeline after processing at the Kollsnes Gas Processing Plant in Norway
Following the Contractors who working on the Troll project:
GE Oil & Gas: Designed, built and installed the original Troll B subsea production system
Aker Solutions:
Six subsea trees and a tool package
38 kilometres of umbilicals
Hyundai Heavy Industries: Construction of Troll C floating platform
Emtunga:
Troll A - Pre-engineering, Pre-compression Power Transformer Modules
Troll A - Additional accommodation
Aibel:
Area preparation, installation and integration of new living quarters modules for Troll A platform
Study contract for conceptual development of the Troll A 3rd & 4th compressor trains
Upgrading the Troll A-platform with a new compression module, utility module and in addition a new electro module for receiving electricity from ashore
ABB:
Engineering, procurement, construction and installation offshore of a 4000-ton gas compression module
Supply of an offshore power transmission system
Electric drive system for two pre-compression units for Troll A
Two high-voltage direct current (HVDC) power transmission systems, including HVDC converters and subsea direct current cables to provide reliable power to the offshore equipment from the shore
Jotun: Painting Troll A - Jacket, Deck, Heli-deck, Topside
World records
In 1996 the platform set the Guinness World Record for 'largest offshore gas platform'.
In 2006, the 10th anniversary of Statoil's operatorship of Troll gas production was celebrated with a concert by Katie Melua held at the base of the Troll A platform. As well as entertaining the workers on the rig, the concert set a new world record for the deepest underwater concert at 303 metres below sea level.
No comments:
Post a Comment