Daqing Oilfield is located in the west of Heilongjiang Province, in the middle of Songnen Plain, between Harbin and Qiqihar. The oilfield is 0/40km long from north to south and 70km wide from east to west, with a total area of 5,470 square kilometers. 1960 In March, the CPC Central Committee approved to launch an oil battle, and in June, 45438+0963, the production capacity was 6 million tons, and the crude oil produced in that year was 4.39 million tons, which played a decisive role in realizing China's oil self-sufficiency. In 1976, the crude oil output exceeded 50 million tons. By 1996, the annual crude oil output had been 50 million tons continuously, with a stable output of 2 1 year. 1995 produced 56 million tons of crude oil, which is the largest oil field in China. Shengli Oilfield is located in the Yellow River Delta near Bohai Sea in northern Shandong Province, mainly distributed in 28 counties (districts) of 8 cities including Dongying, Binzhou, Dezhou, Jinan, Weifang, Zibo, Liaocheng and Yantai, with a main operating area of about 44,000 square kilometers. 1995, with an annual output of 30 million tons of crude oil, is the second largest oil field in China. Liaohe Oilfield is mainly distributed in the middle and lower reaches of Liaohe Plain, eastern Inner Mongolia and Liaodong Bay beach area. Twenty-six oil fields have been developed and constructed, and nine production bases have been built, including Xinglongtai, Shuguang, Huanxiling, Jinzhou, Goldman Sachs, Shenyang, Ciyutuo, Lengjia and Horqin, covering 32 counties (banners) in Liaoning Province and the Inner Mongolia Autonomous Region 13 cities, with a total area of nearly 654.38 million square kilometers. 1995 crude oil output15.52 million tons, ranking third in China.