Statoil has been issued a number of improvement points in relation to its subsea compression on the Gullfaks field.
The Norwegian Petroleum Safety Authority (PSA) has given the operator a February deadline to rectify its concerns.
In 2015, the firm began operation of a subsea facility for compression of wet gas from Gullfaks Sør.
The gas is transported through a 15-kilometre-long pipeline to Gullfaks C for processing.
As the pressure in the reservoir falls, the facility will help maintain production and thereby increase the field’s utilisation rate.
The facility was the first of its kind in the world.
The facility is controlled from Gullfaks C using a control cable on the seabed.
The cable carries electrical power, signals and chemicals through a shared outer sleeve.
But due to an incident involving the cable, which caused a chemical spill, the PSA has carried out an audit of Statoil’s follow-up on the incident.
The PSA also looked at the design engineering and manufacture of a new control cable.
The audit was conducted in the form of meetings on November 17th last year in Bergen and on December at Nexans, the supplier, in Bergen.
The audit detected no regulatory non-conformities but found improvement points related to remits, authorities and division of responsibilities.