Worley has been awarded a services contract for a residue upgrade project at Saudi Aramco's Ras Tanura refinery. The project will convert low-value refinery residue into higher-value products including gasoline, jet fuel and ultra-low sulphur diesel. Under the contract, Worley will provide early front-end engineering design (pre-FEED), front-end engineering design (FEED) and project management services for the entire project. These services cover upgrades to the atmospheric and vacuum gas oil from the crude distillation unit, and an upgrade to the atmospheric gas oil from the Khuff condensate unit. This award follows on from the successful completion of the front-end conceptual studies that were completed by Advisian, Worley's consulting business.