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滨南油田一区油井含水率已高达９０％以上，采出的大量地层水（污水）回注地层。但由于污水的水质不能满足储层的要求，回注后在１５～２０ｄ的时间内回注井的吸水能力就大幅度下降。通过综合研究及模拟实验表明：回注污水对该区储层的伤害机理是污水中有４３．７６％的固相颗粒与储层孔喉不匹配，对储层产生了严重的堵塞，有端面堵塞也有孔喉内的深部堵塞，对储层的伤害率平均为９３．８５％。从减轻对储层伤害的角度出发，通过流动实验表明，该区回注的污水至少应通过孔径为６．０μｍ的过滤措施；现场的应用证明该项实验研究为该区的污水回注提供了科学依据。
The moisture content of well in the first area of Binnan Oilfield has reached over 90%. A large amount of formation water (sewage) produced is injected into the formation. However, due to the water quality of the sewage can not meet the requirements of the reservoir, the water absorption capacity of the injection well within 15 ~ 20d after injection back greatly decreases. Through the comprehensive research and simulation experiments, it is shown that the damage mechanism of the injected wastewater on the reservoir is that 43.76% of the solid particles in the sewage do not match the pore throats of the reservoir, causing serious blockage to the reservoir, Blockage also has deep blockage within the throat, the damage rate to the reservoir is 93.85% on average. From the point of view of reducing the harm to the reservoir, the flow experiment shows that the wastewater injected back into this area should pass at least the filter with the pore size of 6.0μm. The field application proves that this experimental study provided the Scientific basis.