Oil prices are likely to fall to around $90 a barrel as global supply rises and demand falls back thanks to a shift to more natural gas usage and increased fuel efficiency, the chief executive of Italian oil and gas major Eni SpA Paolo Scaroni said Thursday. New oil fields coming onstream in Brazil, the Barents Sea off Norway and onshore in the U.S. will lift the world’s oil supply, Mr. Scaroni said. Concurrently, the U.S. shale boom has lifted demand for natural gas, while Europeans would likely shift from using coal and oil to cleaner-burning gas to meet carbon dioxide emissions targets. Gas demand would also prove high in Asia as the region’s economies expand, Mr. Scaroni said. “I see [the oil price] going down rather than up,” he said in an interview with The Wall Street Journal. Mr. Scaroni said it didn’t make sense for the company […]