Daqing Oilfield Company Limited is a major upstream oil and gas company based in Daqing, Heilongjiang Province, China. It serves as the primary operator of the historic Daqing Oil Field, discovered in 1959, which remains one of China's most important petroleum assets despite its mature status.
As a wholly-owned subsidiary of PetroChina Company Limited within the China National Petroleum Corporation (CNPC) group, the company focuses on exploration, development, and production of crude oil and natural gas. Its core activities include advanced enhanced oil recovery (EOR) technologies such as polymer flooding, alkaline-surfactant-polymer (ASP) flooding, and chemical flooding, which have enabled sustained high output from aging reservoirs.
The company also engages in engineering and technical services, equipment manufacturing, oilfield chemicals, and production support. It has pioneered numerous innovations in oilfield development and maintains a significant workforce and integrated business structure.
Daqing Oilfield Company Limited hosts the secretariat of ISO/TC 67/SC 10 on Enhanced Oil Recovery and has led the proposal and development of multiple international standards in EOR terminology, equipment, and testing methods, enhancing its position as a key player in global petroleum standardization and technology leadership.
Also known as PetroChina Daqing Oilfield Company and CNPC Daqing Oilfield Company.
ISO issues the first global standard defining EOR terms and definitions, covering chemical, gas, thermal and microbial recovery methods.
