Plans for a 400,000 barrels per day refinery expansion at Ras Tanura, Saudi Arabia, could be postponed for years, Reuters has reported, citing industry sources. Contractor Worley Parsons, which holds the contract for both front-end engineering and design and project management, has taken staff off the project and halted work in the last two weeks, the sources said. "Aramco never says a project is cancelled, it's postponed for months to years. This one they are talking about five years or more postponement," the source said.