固井、钻井液添加剂室内实验研究

THE LABORATORY STUDY OF SLURRY AND MUD ADDITIVE

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。

Slurry displacement efficiency is an important stage to improve cementing quality,but there is not any methods, which can displace mud,especia1ly mud cake from borehole comp1etely before now. The hocompletly displacement with effects the bonding strengh of cement mant1e. The GSN additive has been development because s1urry disp1acement is not enough cleaning the mud and mud cake from borehole The GSN's main mechanism is that exists in the mud cake during drilling,which can be interactive with the ionic of slurry during cementing,so improving cement-formation interface bonding strengh. This pa per praliminarily discusses the GSH's mechanism and shows it,s app1icable on the basis of the laboratory study