Maersk Oil said first steel has been cut for its Floating Storage Offloading (FSO) vessel in Singapore.
The vessel will eventually make the journey to the Culzean project in the North Sea.
A strike steel ceremony was held on July 22nd.
In May, BP doubled its stake in Culzean as part of the energy giant’s £7billion investment programme in the region.
The company raised its holding from 16% to 32% in the development, which is expected to produce enough gas to meet 5% of total UK demand by 2021.
Production at the Maersk-operated field is expected to start in 2019 and continue into the 2030s, with production forecast to peak at the equivalent of 60,000 to 90,000 barrels of oil per day.