Libyan oil-facility guards prevented two of the country’s biggest fields from resuming production, days after the National Oil Corp. reached an agreement to restart operations there to boost output in the politically divided OPEC state. The El Feel, or Elephant, and Sharara fields still aren’t operational after they were shut more than a year and a half ago, an NOC official said Sunday by phone, asking not to be identified for lack of authorization to speak to news media. A group of guards backtracked on their agreement to let oil flow by pipeline from both fields, Khaled Hadloul, an engineer at Mellitah Oil & Gas, which operates Elephant, said by phone. “It’s not clear when the actual output will start,” Hadloul said. “Negotiations with the guards are ongoing,” and the reasons why the guards reversed their position are unclear, he said. Hadloul said he knew that Repsol SA -operated […]