Optimization of Pretreatment Technology for Produced Water in Gas Field

In view of the problems of low overall operation efficiency, serious corrosion of methanol recovery system and obvious sludge blockage in water injection pipeline, the pretreatment technology of produced water in gas field treatment plant has been optimized and improved. By prolonging the settling time of produced water in the unloading tank and raw water tank, the oil and water in the produced water are fully stratified, and an emulsifier is added when necessary to further separate the oil from the produced water. In winter, heat tracing is added to the pipe mixer or the outer wall of the reactor tank, or a heated pipe mixer is installed to properly heat the liquid, and the produced water is fully and evenly mixed with the medicament, giving full play to the medicament effect, preventing the flocs from precipitating too quickly, thus improving the settlement effect. The relevant process optimization and improvement measures are put forward to provide reference for the pretreatment process of produced water.