(EnergyAsia, September 15, Tuesday) — PetroChina International Investment Company Limited, a wholly-owned subsidiary of PetroChina Company Limited, has agreed to pay C$1.9 billion for a 60% stake in the MacKay River and Dover oil sands projects of Canada’s Athabasca Oil Sands Corp (AOSC). The acquisition represents China’s largest investment in Canada. The agreements also provide…