1661. According to the query national party media information public **** platform, PetroChina Dagang Oilfield Oil Extraction Plant is located in the ancient city of Cangzhou, Hebei Province, the oil and gas development range across a city and two counties, **** there are 1,661 oil wells, water injection wells 1009 ports, points and lines of the long face wide, facing the ground supporting facilities aging year by year, safety and environmental protection hazards year by year to increase the number of many difficulties, the safety and environmental protection pressure is enormous.