Petrofac services provider Petrofac has chosen Norway’s DDW Offshore, a subsidiary of Akastor, to support its dismantling and disconnection work related to a floating production, storage and offtake (FPSO) vessel located in the Timor Sea off Australia.

Akastor revealed on Tuesday that its subsidiary, DDW Offshore, had won a contract one year contract with Petrofac for the AHTS Skandi Atlantic. This contract started on September 27, 2022. The Skandi Atlantic built in 2012 is of STX AH08 design and can accommodate 27 people.

Based on the firm’s statement, the AHTS will support the disconnection of the FPSO Northern Effort as well as towing and well isolation works in the laminar and coralline oil fields in the Timor Sea.

FPSO Northern Endeavour; Source: Australian Government Department of Industry, Science, Energy and Resources

In April 2022, Petrofac was contracted as an outsourced operator to complete the dismantling of Stage 1 for the Northern Endeavor FPSO through an estimated A$325 million deal or $236 million.

At the time, Petrofac announced that it would begin a managed transition of operational control from the existing operator, Upstream Production Solutions, which was contracted in May 2020 to provide operations and maintenance services for this FPSO.

According to information from DISER, the dismantling and clean-up is expected to take several years and involve three phases. Instead, Phase 1 involves decommissioning and disconnecting the Northern Endeavor FPSO from underwater equipment.

Next, Phase 2 will cover the permanent plugging and abandonment of the well while Phase 3 requires the removal of subsea infrastructure and the remediation of the Laminaria and Corallina fields.

In July 2022, Wood was contracted by the Australian government to oversee the first phase of the dismantling of the 274 meter long FPSO Northern Endeavour, moored between the Laminaria and Corallina fields.

Located about 550 km northwest of Darwin in the Timor Sea, this FPSO started production in 1999 and peaked at 170,000 barrels of oil per day. However, the FPSO Northern Endeavor is no longer producing oil.