PetroChina, a 13-year-old Chinese oil firm, surpassed American giant Exxon Mobil Corp. last year in oil production. Part of its growth strategy is to aggressively snap up assets around the world.
Here are some of the major international deals involving PetroChina Co. Ltd. or its parent, China National Petroleum Corp., during the past five years.
— 1/3/2012: Spent $667 million to become the 100-percent owner of the MacKay River oil sands project in Canada.
— 8/22/2011: Buys Australia's Bow Energy for $430 million through its Arrow Energy joint venture.
— 5/18/2010: Acquires a 35-percent stake in Syria Shell Petroleum Development for $1.6 billion.
— 3/8/2010: Teams with Royal Dutch Shell to buy Australian gas company Arrow Energy for $3.4 billion.
— 8/31/2009: Buys interest in Canadian oil sands projects for $1.7 billion
— 4/16/2009: Teams with Kazakhstan's KazMunaiGaz to buy one of Kazakhstan's largest oil producers, MangistauMunaiGaz, for $3.3 billion.
— 7/31/2007: Spent $46 million for drilling licenses in eastern Siberia through a partnership with Rosneft.
— 1/12/2007: Buys EnCana Corp.'s assets in Chad including 11 exploratory wells for $202.5 million.
Source: Derrick Petroleum Services, a consulting firm that collects market data on the petroleum industry.