Hasselmus is a conventional gas development located in shallow water in Norway and is operated by Okea. Discovered in 1999, Hasselmus lies in block 6407/9P (PL 093), with water depth of around 813 feet.

The project is currently in construction stage and is expected to start commercial production in 2023. Final investment decision (FID) of the project was approved in 2021. The development cost is expected to be $288 m. The Hasselmus conventional gas development will involve the drilling of approximately one wells and includes subsea tree.

Field participation details

The field is owned by Neptune Energy Group, Okea and Petoro.

Production from Hasselmus

Production from the Hasselmus conventional gas development project is expected to begin in 2023 and is forecast to peak in 2029, to approximately 23 Mmcfd of natural gas and 392 bpd of natural gas liquids. Based on economic assumptions, the production will continue until the field reaches its economic limit in 2055.

Remaining recoverable reserves

The field is expected to recover 17.8 Mmboe, comprised of 96.95 bcf of natural gas reserves and 1.64 Mmbbl of natural gas liquid reserves.

Contractors involved in the Hasselmus conventional gas field

Some of the key contractors involved in the Hasselmus project as follows.

Main EPC: Aker Solutions, Schlumberger and Subsea 7

Other Contractors: China National Offshore Oil and TechnipFMC

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About Okea

OKEA AS (Okea) an explorer and developer of oil and gas. The company provides services such as oil and gas exploration, production, and development of oil and gas producing properties across Norway. It also develops discovered oil fields on the Norwegian continental shelf through applying affordable, modern and practical solutions, among others. Okea has partnered with Seacrest Capital Group to develop a portfolio of oil production assets. The company entered into an agreement to acquire 60 percentage shares in Yme field from Repsol. Okea is headquartered in Trondheim, Norway.


Information on the field is sourced from GlobalData’s fields database that provides detailed information on all producing, announced and planned oil and gas fields globally. Not all companies mentioned in the article may be currently existing due to their merger or acquisition or business closure.