China National Petroleum Corporation

PetroChina Company Limited () is a Chinese oil and gas company and is the listed arm of state-owned China National Petroleum Corporation (CNPC), headquartered in Dongcheng District, Beijing. The company is currently Asia's largest oil and gas producer. Traded in Hong Kong and New York, the mainland enterprise announced its plans to issue stock in Shanghai in November 2007, and subsequently entered the constituent of SSE 50 Index. In the 2020 Forbes Global 2000, PetroChina was ranked as the 32nd-largest public company in the world.

Chinese state-owned oil and gas corporation

oil field

Series of explosions at a petrochemical plant in Jilin, China

Chinese oil and gas company

PetroKazakhstan is a Canadian oil company, based in Calgary, Alberta, that has all of its business focused on Kazakhstan where it had some of oil and of natural gas reserves (January 2005 estimate) in the Turgai basin region. These are the second largest Kazakhstani proven reserves after ChevronTexaco's TengizChevroil. Estimated production is of oil per day. In 2005, PetroKazakhstan was acquired by China National Petroleum Corporation and then in 2006 transferred to PetroChina.