Field/project development

Dana Awards Bittern Work to Subsea7

The EPCI contract will see a new water-injection pipeline added to the complex.

The Triton FPSO hosts oil and gas volumes from eight area fields.
SOURCE: Serica Energy

Subsea7 has been tapped by Dana Petroleum (E&P) Ltd. for pipeline work related to the the Bittern field development, located approximately 190 km east of Aberdeen in the UK Central North Sea. The contractor said that the award is sizable, which it defines as being worth between $50 and $150 million.

The contract scope includes project management, engineering, procurement, construction, and installation (EPCI) of a 22-km-long, 12-in. water-injection pipeline. It also includes associated subsea structures and tie-ins at the Triton floating production, storage, and offloading (FPSO) vessel and the Bittern field.

Project management and engineering work will begin immediately in Aberdeen. The offshore activities are scheduled for the third quarter of 2025.

"We are pleased that Dana Petroleum has chosen Subsea7 to provide project management expertise and engineering technical knowledge for this important field development,” said Steve Wisely, senior vice president of UK and global inspection, repair and maintenance, for Subsea7. “We look forward to supporting Dana in meeting their project objectives and for the opportunity to play a key role in the safe and successful completion of Bittern.”

The Bittern oil and gas field is in Blocks 29/1a and 29/1b, 22 km southeast of the Triton FPSO. The field was discovered in 1996 and has been developed through five production wells and two water-injection wells via a subsea tieback to the FPSO. First production was achieved in April 2000.

Several well interventions and a sidetrack of B2 well were executed between 2019 and 2022. A sidetrack of the B1 well is planned for this year.


The FPSO hosts production from eight producing oil fields. The fields include Bittern, Evelyn, Guillemot West and Guillemot Northwest, Gannet E, Clapham, Pict, and Saxon.

Dana Petroleum operates the FPSO along with the Bittern, Guillemot West/Northwest, Clapham, Saxon, and Pict fields. The operator's partners in the area include Waldorf Production UK and Tailwind Mistral, a subsidiary of Serica Energy.