Hanz subsea tie-back begins production in NCS' first re-use of infrastructure, Aker BP reports

April 22, 2024

(WO) – Production has started from the Hanz subsea development in the North Sea. Hanz is operated by Aker BP, with Equinor and Sval Energy as partners. Hanz is tied into the Ivar Aasen platform, about 15 km further south.

Source: Aker BP

Total investments are estimated at close to NOK 5 billion, and total reserves are around 20 MMboe.

“This is yet another great example of what we can achieve working as one team with our suppliers towards a common goal and with shared incentives. In addition, innovative solutions with reuse of infrastructure and use of cross-flow well have contributed to lower costs and lower emissions,” says Aker BP CEO, Karl Johnny Hersvik.

“Development of the Hanz discovery is important for the development of the Ivar Aasen area. Production start from Hanz in 2024 will help us maintain good production from the Ivar Aasen platform,” Hersvik adds.

Unique re-use of infrastructure and use of a cross-flow well. Hanz was discovered in 1997. After the delivery of the Plan for Development and Operation (PDO) for the Ivar Aasen area, which included the Hanz development, the project matured an optimized development solution by re-using subsea production systems (SPS) from the Jette field. It is the first time that production equipment has been re-used in a new field development on the NCS.

In addition, the strategy for how the oil and gas is to be recovered was changed to include the use of a cross-flow well for water injection. This results in a substantial reduction of power consumption, less use of chemicals and less equipment on the seabed. 

“This development solution will be more cost-efficient and have a smaller environmental footprint than originally planned for. This is in line with Aker BP’s continuous search for improvements, where the goal is to produce with low costs and low emissions,” says VP Projects Edvard Grieg and Ivar Aasen, Stine Kongshaug McIntosh.

The change in the development solution for Hanz since the original PDO was submitted led the partnership to send a formal statement regarding the investment decision and the selected concept to the authorities in December 2021.

Minimized CO2 emissions. The Ivar Aasen field is located on the Utsira High in the northern part of the North Sea, around 175 km west of Karmøy. 

The field was discovered in 2008, and was joined with other discoveries in the area, including Hanz, which was proven in 1997. The first oil from Ivar Aasen was produced in Dec. 2016.

Ivar Aasen receives power from the Edvard Grieg platform, 10 kilometers to the southeast. From 2022, the field will receive power from shore via the Johan Sverdrup field, thereby minimizing CO2 emissions.

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