替净是提高固井质量的一个重要前提。然而目前所具有的方法，还不能将钻井液，尤其是不能把滤饼清除干净，严重影响了水泥环的胶结强度。既然不能把它们清除干净，那是否可以利用它们，于是研究试验出了GSN添加剂。它的主要作用是随钻存在于井壁滤饼中，固井时可与水泥中的离子反应，提高滤饼与水泥环的胶结强度，从而提高水泥环界面强度。本文对这种新方法的作用机理进行了初步探讨，并在大量试验的基础上证明了它的实用性。 For the net is to improve the quality of cementing is an important prerequisite. However, the methods currently used can not remove the drilling fluid, in particular, the filter cake, and seriously affect the cementing strength of the cement ring. Since they can not be cleaned, then whether they can use them, so study and test the GSN additives. Its main function is to exist in the wellbore filter cakes while drilling. When cementing, it can react with the ions in the cement to improve the cementing strength between the filter cakes and the cement rings so as to improve the strength of the cement ring interface. In this paper, the mechanism of action of this new method is discussed, and its practicability is proved on the basis of a large number of experiments.