Exports from an oil field in western Libya and a subsea natural gas link to Italy were closed following protests, according to a person familiar with the matter, the latest disruptions to the North African country’s energy infrastructure. The Wafa field’s output of 40,000 to 45,000 barrels a day won’t reach the port of Mellitah for exports after a valve was closed on Sunday, the person said, asking not to be named because the information isn’t public. The oil is being stored at the field’s site, where tanks can hold about seven days of production, they said.