几种常见的保护储层钻井液

The Application Prospects of Several Common Formation-protected Drilling-fluids

目前常见的保护储层钻井液主要有正电胶钻井液、超低渗透钻井液、甲基葡萄糖甙钻井液、屏蔽暂堵保护油气层钻井液、油基钻井液和合成基钻井液。其中,正电胶钻井液已成为国内比较常用的钻井液,油基和合成基钻井液多用于各类水平井、大位移井钻井的重要储层保护,甲基葡萄糖甙钻井液体系成功应用于吐哈油田4口小井眼开窗侧钻井。

According to the drilling-mud used present, there are positive gel drilling-fluids （MMH）, Ultra Low Invasion-Fluid （ULIF）, Methyl Glucoside drilling-mud （MEG）, Temporaryshield plugging mud, Oil based mud and Synthetic based fluids. Amovg them, the MMH is used in ~e most drills in domestic. Oil based mud and Synthetic based fluids are the best choices for the horizontal drilling and large deflection wells. It can protect the formation from mud invasion. MEG has been successfully used in the Tuha oilfield. They have appliedthe MEG to four slim hole sidetracking. It has acquired a very good effect,and it will be widely taken because of its environmental friendly.