钻井、固井在油井近井地带遗留有污染物 ,常规压裂时被压裂液带向油层深处产生二次污染 ,影响油井压裂后的增产效果和稳产。去污压裂技术是在压裂施工前向地层挤入定量活性水清洗、稀释污物 ,再依靠地层及液体的弹性能量将污物吐出 ,并排离封隔器以下井筒部位 ,然后进行压裂施工。现场试验资料证明 ,该技术可以清除或减轻二次污染 ,增产效果明显 ,适用性强 Drilling and cementing left some pollutants in the near well region of the oil well. During the conventional fracturing, secondary pollution was caused by the fracturing fluid in the deep oil zone, affecting the stimulation effect and stable production after oil well fracturing. Decontamination and fracturing technology is to squeeze into the formation before the fracturing of quantitative active water cleaning, dilution of dirt, and then rely on the elastic properties of the formation and liquid spit out the dirt and the packer below the wellbore site, and then fracturing construction. Field test data show that the technology can clear or reduce secondary pollution, increase production efficiency, applicability