Other OPEC+ members including Saudi Arabia have been also pressing Kazakhstan to cut production to meet its quotas.
On Thursday, OPEC+ decided to raise output ahead of schedule, signalling the group was confident non-compliant members would reduce output in the coming weeks.
According to traders’ estimates, the CPC pipeline, which ships about one per cent of world oil supply, could lose about 50 per cent of its capacity if it can only rely on one berth.
Oil exports via the CPC pipeline were set at 1.7 million barrels per day, or approximately 6.5 million tonnes, for April, meaning that supplies of more than 800,000 barrels per day could potentially be lost.
Traders also said that oil production in Kazakhstan, which exports around 80 per cent of its total oil via the route, would decline if the restrictions remain in place for more than a week.