Yinan, Shandong. According to relevant public information, Shengli Oilfield belongs to Shengli Petroleum Administration Bureau of Sinopec Group, and its general manager is from Yinan, Shandong Province. Shengli Oilfield is an important petroleum industrial base in China, and it is the collective name of Shengli Petroleum Administration Bureau of China Petrochemical Group, Shengli Oilfield Branch of China Petrochemical Group and Shengli Petroleum Engineering Co., Ltd. of China Petrochemical Petroleum Engineering Technical Service Co., Ltd.