shale stability to hydration 泥页岩水化稳定性
Preexisting research shows that there are three main factors that affect the borehole stability of Air-Drilling: mechanical reason, hydration reason and the Weaked surface instability reason.
研究表明，影响空气钻井井壁稳定的主要因素有三个：力学不稳定，水化不稳定和岩体破裂或弱面不稳定。
The method to predict wellbore stability is provided considering hydration and filtrate cake quality. In addition, this method was applied in field with better prediction results.
给出了考虑水化作用和滤饼质量后预测井壁稳定性的方法，同时将该方法应用于现场，取得了较好的预测效果。
Performance: Corrosion resistance good, the hydration heat low, the thermal stability is good.
性能：抗腐蚀较好，水化热低、耐热性较好。
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