• From drawing board to fabrication yard

    Aibel undertakes quality work at its own facilities

Troll A 3&4

Aibel won the billion kroner contract to expand the gas compression capacity on Troll in the autumn 2011. The contract included three new modules to extend the life of the Troll field.

The contract was an EPCIC contract, which means that Aibel provided engineering, procurement, construction, installation and commissioning.

Troll 3&4 - september 2013

The largest module, M11, was built at Aibel’s yard in Laem Chabang in Thailand. M11 is a compressor module that will expand the capacity on the Troll A platform. Two new compressors will enable gas production from the Troll field right up to the year 2063. M11 sailed from Thailand to Haugesund in April 2014. After a crane had been installed, the module was transported out to the field. 

M13, a module with auxiliary systems, was constructed at Aibel's yard in Haugesund. The new compressors on Troll A will be powered from shore. On the platform, DC power from land must be converted back to AC, and this will take place on the M13. The module was transported out to the field in late summer 2014.

Troll 3&4 - september 2013

M12 is an electrical module. It was hoisted on board Troll A in summer 2013.  

In the hectic peak period of autumn 2013, almost 900 people from Aibel and subcontractors were working on the Troll modules.


The Troll field lies in the northern part of the North Sea, around 65 kilometres west of Kollsnes, near Bergen.

The field comprises the main Troll East and Troll West structures in blocks 31/2, 31/3, 31/5 and 31/6.

Containing about 40 per cent of total gas reserves on the Norwegian continental shelf (NCS), it represents the very cornerstone of Norway’s offshore gas production.

Troll is also one of the largest oil fields on the Norwegian continental shelf. In 2002 the oil production was more than 400,000 barrels per day.

The enormous gas reservoirs lying 1,400 metres below sea level are expected to produce for at least another 70 years.

Source: Statoil