百重7井区钻井液对地下水的污染特性研究

百重7井区有丰富的地下水资源，为了考察钻井过程中钻井液对地下水的污染程度，我们对钻井液对地下水的污染特性进行了研究。研究结果表明，在钻井过程中由于进入地下水水层中的污染物总量很小，同时由于所使用的钻井液添加剂的可生化性较好和生物毒性小，进入地下水水层的污染物不会对水源构成严重危害。另外由于地层有一定的自我净化能力，地下水水质不会因钻井而出现较大的变化。

Underground Water Pollution study in Bai zhong 7

Underground water resource is very abundant in Baizhong 7.In this area there are lots of drilling wells and the water quality of underground water has the pollution tendency because of drilling process.Lab study showed that only few of pollutants went into the underground water in drilling process because of the low filtration factor,so the pollution of underground water was not serious.Meanwhile,the self purification of underground water was studied in this paper.The pollutants would be limited in a very small area because of absorption and the low diffusing rate,so the water quality would not be changed for a long time.