目前大港油田原油脱水中使用的破乳剂多为水溶性破乳剂，水溶性破乳剂会造成含油污水中溶解有机物增加，COD增大，影响含油污水处理。如使用油溶性破乳剂则不存在上述问题，还可降低污水处理成本，增加经济效益；针对油田采出污水处理特点，开发了DWF絮凝剂，该絮凝剂可采用混絮凝直接过滤工艺，克服了传统配方药剂的缺点，现场试验证明该絮凝剂效果良好。 At present, most of the demulsifiers used in the dewatering of crude oil in Dagang Oilfield are mostly water-soluble demulsifiers. The water-soluble demulsifiers will cause the dissolved organic matter in oil-contaminated water to increase and the COD increase, which will affect the treatment of oily wastewater. Such as the use of oil-soluble demulsifier does not exist the above problems, but also reduce the cost of sewage treatment and increase economic benefits; for the characteristics of the oilfield sewage treatment, the development of DWF flocculant, flocculant can be flocculation flocculation direct filtration process to overcome Disadvantages of the traditional formula pharmaceuticals, field tests show that the flocculant works well.