Noreco has been hit by another field shut-in after the Lulita field was closed due to technical problems.
The company said the duration of the current shutdown is unknown.
It comes after a number of stops and starts with the Huntington oilfield off the UK.
Noreco said reported July production for Lulita has been based on an equity share of 10% post the transaction announced at the beginning of July.
The Oselvar field has also been closed for most of the month due to planned summer shutdown and the company said it is still shut in.
Noreco previously sold off its interest in the field but said it would continue to report production and revenue until completion of the transaction.
Meanwhile Huntington field production has been relatively stable throughout July and the CATS onshore summer slowdown – which was scheduled for June and July – has had no impact on production.
Earlier this year a restructuring proposal for Noreco was approved at an annual general meeting.
The company said a qualified majority voted to consider the plans and the issuance of shares upon conversion of bonds.
Last year the company put forward a restructuring proposal to stakeholders following a temporary suspension of its shares on the Oslo Stock Exchange.
The company has faced a number of financial difficulties following the shutdown of the Huntington field which resulted in impairments of about 700million kroner and 100million kroner.