Petrofac said it won $900 million contract from state-controlled Petroleum Development Oman to provide engineering and procurement services at Yibal Khuff project, in southwest of Muscat, under a four-year contract. PDO, Oman's top oil and gas producer, is 60% owned by the government, 34% by Royal Dutch Shell, 4% by Total and 2% by Portugal's Partex, TradeArabia reported.