PetroChina seeks to strengthen Relationships with Kazakhstan, Venezuela, and Iraq

    By Doug Young      PetroChina Co Ltd (0857.HK), the world's second-most valuable oil and gas producer after Exxon Mobil Corp (XOM.N), said on Thursday that it wants to further strengthen relationships with Venezuela, Iraq and Kazakhstan as it looks for new sources of oil.     The company was also in discussions for cooperation agreements...