对江苏油田１５口井不同类型的钻井污水研制了处理实验流程和二次混凝法（其中，一级处理采用化学脱稳和强化离心分离，以除去部分污染物及固体颗粒；二级处理将离心分离脱出液进行混凝处理，使之达到排放标准），并进行了室内处理试验。结果表明，采用二次混凝处理后的污水主要污染物符合ＧＢ８９７８－８８－类及二类污染物排放标准。石油类去除率为９６％～１００％，ＣＯＤｃｒ去除率为９２％～９９％，悬浮物去除率为９６％～１００％，脱色率为９２％～９９．７％；净化后水占原体积５４％～９９％；污水用处理剂费用为０．１２～１０．２０元／ｍ３，一般为０．５０～３元／ｍ３ The experimental treatment process and secondary coagulation process were developed for different types of drilling wastewater in 15 wells of Jiangsu Oilfield (the first-stage treatment adopted chemical destabilization and enhanced centrifugal separation to remove some pollutants and solid particles; the second-stage treatment Centrifugal separation of the effluent coagulation treatment to achieve emission standards), and carried out indoor treatment test. The results showed that the main pollutants of the sewage after the secondary coagulation treatment met the emission standards of GB8978-88- and two types of pollutants. The removal rate of petroleum is 96% ~ 100%, the removal rate of CODcr is 92% ~ 99%, the removal rate of suspended solids is 96% ~ 100% and the decolorization rate is 92% ~ 99.7% % ~ 99%; sewage treatment agent costs 0.12 ~ 10.20 yuan / m3, usually 0.50 ~ 3 yuan / m3