LONDON—Prolonged closures in Libya’s oil fields are set to delay a return to normal output, a senior official said Friday—even after production at the country’s largest oil field is restarted. Speaking at the third New Libya Oil and Gas Forum in London, Anwar Agil, head of production management at Libya’s National Oil Corporation, said a return to normal production at the country’s largest oil field could be delayed by four months because more than 20 underground pumps needed to be replaced. The Sharara field, in western Libya, which is operated by Spain’s Repsol SA, is currently shut after being occupied by local protesters seeking better redistribution of oil revenue. Underground pumps there have been repeatedly switched on and off amid false starts. The field has the capacity to produce 340,000 barrels a day—more than a fifth of Libya’s normal output of about 1.5 million barrels a day. But even […]