STAVANGER, Norway – The Saipem 7000 has lifted the 3,500-metric ton (3,858-ton) Dvalin gas processing/compression module onto the Equinor-operated Heidrun platform in the Norwegian Sea.
According to Wintershall Dea, operator of the Dvalin field, the three-hour operation was among the heaviest lifts ever onto an existing platform offshore Norway.
Dvalin is 15 km (9.3 mi) southeast of the Heidrun field. Aibel built the module at its yard in Haugesund on behalf of Equinor, operator of the Heidrun platform. Wintershall Dea worked closely with both companies to ensure smooth delivery.
The company commissioned a four-well subsea tieback to Heidrun comprising a four-slot template, flowlines and umbilical, the gas treatment module, and a 400-metric ton (441-ton) utility module that had been installed previously.
Following initial processing at Heidrun, the gas will head through a 7.5-km (4.7-mi) spur line to the new Polarled gas transportation system for subsequent processing to dry gas at the Nyhamna onshore terminal.
Finally, the gas will be transported through the Gassled network to the market.
Dvalin is 259 km (161 mi) north of Kristiansund in around 400 m (1,312 ft) water depth, with estimated reserves of 113.3 MMboe.