(EnergyAsia, May 16 2011, Monday) — Two of China’s three state-owned majors said higher crude prices and production boosted their first-quarter financial performances.CNOOC Ltd, China’s main offshore oil and gas producer, said increased production and sales raised its January-March quarter revenue by 59% to 48.5 billion yuan from year-ago levels. (US$1=6.5 yuan).The Beijing-based company, which…