PetroChina, thesingle biggest investor in Iraq’s oil sector, is pulling some ofits staff out of the Middle East nation, but production remainsunaffected as militant Islamists threaten the unity of OPEC’ssecond-largest producer. China is Iraq’s largest oil client, and its state energyfirms, which also include Sinopec Group and CNOOC Ltd,together hold more than a fifth of the country’s oil projectsafter securing some of its fields through auctions held in 2009. Some non-essential staff have been evacuated, said MaoZefeng, joint company secretary of PetroChina, China’s largestenergy firm, without saying how many or if they had been movedout of Iraq entirely or to safer zones in the country. A few oilfield service staff have been evacuated, a secondcompany official said. “We’ve got our contingency plan,” said Mao. “But as ourfields are all in the south, they are not affected yet.” Iraqi officials say the southern regions that […]