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            Daqing Oil Province

            Daqing Oil Province, located in the Songliao Plain in northeastern China, is the largest oil-producing area in China. The source bed in the Daqing Oilfield is mainly Mesozoic Cretaceous sandstone of continental facies, 900-1,200 meters underground. The crude oil is paraffin based, characterized by a high wax content (20%-30%), high freezing point (25 ℃-30 ℃), high viscosity (ground viscosity of 35), and a low sulphur content (less than 0.1%).

            Daqing_2

            On September 26, 1959, a commercial oil flow was obtained from well Songji-3 in the south of the central depression in the Songliao Basin, marking the discovery of Daqing Oilfield. In March 1960, development and productivity construction of Daqing Oilfield began. In 1976, the oilfield's annual crude production exceeded 50 million tons for the first time, making it one of the world's famous giant oilfields. It had maintained annual crude production at 50 million tons for 27 years since then.

            In the late 1980s, most oil fields in the Daqing area entered the late stage of development with a total water cut of up to 90%. However, Daqing managed to stabilize its annual production, thanks to measures such as the comprehensive control of water flooding, accelerating the production boost of peripheral resource replacement areas and reinforcing tertiary oil recovery by means of polymer flooding.

            In 2014, Daqing Oilfield stabilized its production at more than 40 million tons for the 12th consecutive year through finely controlled waterflood to tap potential, optimized polymer flooding for higher sweep efficiency, massive deployment of ASP flooding and industrial deployment of carbon dioxide flooding. In particular, production by tertiary recovery maintained steady growth to reach 14.02 million tons, exceeding 10 million tons for the 13th consecutive year. In 2016, Daqing Oilfield produced 36.56 million tons of crude through strengthening fine water flooding, promoting tertiary recovery technology, optimizing polymer flooding and rolling out ASP flooding.

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