汶川地震断裂带科学钻探项目一号孔(WFSD - 1)钻遇了30多米的断层泥。

The first drilling hole of the Wenchuan earthquake fault science drilling project (WFSD-1) experienced up to more than 30 meters of the fault gouge drilling process.

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气体钻井由于其机械钻速快，能有效防止水敏性泥页岩坍塌，杜绝井漏。

The gas drilling technology is increasingly applied these days due to its high ROP, effective prevention of the cave-in of water-sensitive shales and the capability to eliminate lost circulations.

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