针对复合离子聚合物泥浆体系的钻井污水胶体稳定性好、ＣＯＤ值高、不易处理等特点，采用二次混凝法处理，获得了成功．实验证明该法应用于江苏油田崔６—３＃井钻井污水处理，出水水质各项指标均达到了国家污水综合排放标准．该工艺效桌显著，其中ＣＯＤ去除率达到９９．３％，ＳＳ去除达到了９９．４％，Ｃｒ６＋去除率达９８．９％，并且处理成本较低，具有一定的实用价值。 Due to the good colloidal stability, high COD value, difficult to deal with, etc., the drilling fluid colloidal composite ion polymer mud system has been treated successfully by the secondary coagulation method. The experiment proves that this method is applied to the drilling wastewater treatment of Cui 6-3 # well in Jiangsu Oilfield. All the indexes of effluent quality reach the national integrated discharge standard of wastewater. The process efficiency table is significant, of which COD removal rate reached 99.3%, SS removal reached 99.4%, Cr6 + removal rate of 98.9%, and lower processing costs, has a certain practical value.