Oselvar (Norwegian: Oselvarfeltet) is a subsea oil field, abandoned since April 2018, located 250 km (160 mi) southwest of Stavanger in the southern Norwegian section of the North Sea, close to the British border.

[3] The original estimated reserves at Oselvar were 38 million barrels of oil[4] and 4 billion cubic metres (140×10^9 cu ft) of natural gas.

In January 2022, DNO ASA reportedly had approval from Norway’s Petroleum Safety Authority (PSA) to remove subsea facilities from the Oselvar field.

Production License 274 which covers the area of the field was given in 2002 to then operator DONG.

Produced oil and gas was transported to the Ula field platform for processing via the Oselvar module.