将钻井完井过程中的漏失分为由裂缝宽度变化引起的漏失和裂缝面向基块的漏失两部分，建立了工作液漏失模型。
The loss are divided into the loss by the changing of fracture width and the loss from fracture face to matrix, and the loss model of working fluid is established.
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.
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