Study on pretreatment technology of Oilfield Industrial Sewage

Abstract At present, Oilfield industrial sewage treatment has not yet formed mature technology. However, with the development of tight oil blocks and the construction of large-scale fracture network fracturing, the industrial sewage generated in A oilfield (including fracturing flow-back fluid, substitution fluid, water for well-flushing, pressure relief water, etc.) has increased year by year. The quality of produced water in oilfield has gradually deteriorated. Oilfield wastewater treatment is becoming more and more difficult. The built oil-bearing wastewater treatment process has shown inadaptability. In recent years, by analyzing the process operation parameters, studying the characteristics of oily wastewater treatment process, and combining with years of practical management experience, A oilfield has optimized the industrial wastewater pretreatment process. Optimize the process flow according to the actual development and production. This study ensures the development effect of the oilfield. It lays the foundation for further reducing the investment and operation cost of sewage station renovation. At the same time, it is great significance to study and optimize the pretreatment process of industrial sewage in oil field.