由于地层漏失严重，作业冲砂施工过程中工作液无法将井筒内的砂柱携出地面。
For serious formation leakage, the working fluid can't carry sand column to ground surface in the process of sand washing.
1井是具有钻进时液柱压力与地层漏失压力相接近特点的一口注水井。
The well S1-1 is a water injection well, which has the characteristic-close pressure between liquid column and formation leakage.
试验结果表明：加了纳米颗粒材料的粘弹性表面活性剂(VES)溶液可以在高温下保持较高粘度且可控制其增产液的漏失量。
The experimental results demonstrated that nanoparticles added to a VES solution could maintain viscosity at high temperature and control the fluid loss of VES stimulation fluid.
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