On May 31, 2016, our company was invited by the China Petroleum and Petrochemical Engineering Research Society to participate in the 4th Petroleum and Petrochemical Water Treatment Technology Seminar. At the meeting, we listened to the problems currently faced by oilfield companies in sewage treatment, and the current sewage treatment methods are relatively advanced. At the same time, our company's current treatment methods, treatment results and experience in this type of sewage will be shared with the participating units. The conference has a profound effect on the in-depth development of oilfield wastewater treatment, solving the difficulties in wastewater treatment, improving treatment efficiency, and reducing treatment costs. All participating units also put forward constructive opinions at the conference, which was full of rewards.