Production at the major Libyan oilfield of Sharara reached 58,000 barrels as operations gradually resumed after the lifting of a two-year pipeline blockade, the National Oil Corporation (NOC) said.

The NOC hopes to be able to add 270,000 barrels per day (bpd) to national output over the next three months after announcing that pipelines leading from Sharara and a nearby field, El Feel, had been reopened.

"The NOC gave instructions to operating companies to restart production from the fields and to carry out the necessary testing and maintenance works," the NOC said in a statement. "Production at Sharara reached 58,000 on the first day."

In a video published on social media, workers at Sharara could be seen shouting in celebration as gas flares were relit. The NOC did not give details on the status of El Feel, but an engineer at the field told Reuters earlier that workers there were ready to resume production.

The production capacity of Sharara is about 330,000 bpd, and El Feel around 90,000 bpd, according to the NOC. Sharara had been closed since November 2014 and El Feel since April 2015 because of the pipeline blockade. Production at the fields has also been blocked in the past by local armed factions loyal to rival Libyan alliances, and it is not clear what commitments have been secured from armed groups to allow oil to be pumped again.

Last week, after a faction of Libya’s Petroleum Facilities Guard (PFG) announced a deal to reopen the pipelines, officials at El Feel said a separate group of guards, from the Tebu ethnic group, were preventing a restart there.

Any speedy recovery in Libyan output could slow the Organization of the Petroleum Exporting Countries’ (Opec) efforts to bolster oil prices by cutting global supply. Libya and Nigeria were exempted from a recent Opec pledge to reduce oil production by around 1.8 mbpd.

But Libyan production increases could still be reversed or disrupted by political and armed disputes that continue to plague the North African country five years after the uprising that toppled Muammar Gaddafi.