Pipeline repairs have shut down production at three North Sea platforms.
Repsol Sinopec Resources UK (RSRUK) is working to fix an issue on the main export pipeline from the Claymore platform to the Flotta oil terminal in Orkney.
Production has also been halted from RSRUK’s Tartan and Cnooc’s Golden Eagle platforms which also flow through the same export line.
RSRUK did not elaborate on the source of the problem but said there is no threat to the integrity of the pipeline or any risk of a leak.
A spokeswoman for RSRUK said: “We are carrying out repairs to a valve on the main export pipeline from Claymore to the Flotta terminal.
“This presents no threat to the integrity of the pipeline or risk of loss of hydrocarbon containment. However production is currently shut down on Claymore and from the other platforms in the area that come over Claymore [Tartan and Golden Eagle].
“The regulator has been kept fully informed of progress with the repair plan and we will provide further updates when they are available.”
Claymore lies around 100miles north-east of Aberdeen.
Last month, RSRUK announced plans to extract 10million additional barrels of oil from the Claymore, Tartan and Piper Bravo installations.
Plugging and abandonment work is also due to take place next month on the Fulmar and Montrose platforms.