【Key words】 Extended reach wells； Steerable Drilling； wellbore stability； drilling fluids； torque and drag； cementing； Grabble packed completion；
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Wellbore Stability Evaluation 井壁稳定性评价
The dissertation’s main purpose is to study and analyze the shale wellbore stability, especially the effect of hydraulic difference, chemical potential and temperature after the drilling fluid coming into contact with shale formations.
本论文的主要目的是对泥页岩井壁稳定性进行分析研究，尤其是水基钻井液与泥页岩地层接触后，水力势差、化学势差和温度差对井壁稳定性的影响。
参考来源 - 泥页岩井壁稳定性研究·2,447,543篇论文数据，部分数据来源于NoteExpress
An extremely high-pressure formation, even if not flowing, may have wellbore stability problems.
对于极端高压地层，即使不流动，也可能存在井眼稳定性问题。
The model is applied in evaluation of rock mechanics and wellbore stability in some areas, and it wins a good effect.
并将建立的模型应用于某地区的岩石力学参数及井眼稳定性评价中，现场应用取得了很好的效果。
The study work of wellbore stability and capacity to carry rock cutting during liquid UBD and gas drilling is developed.
开展了液相欠平衡及气体钻井井壁稳定及井筒携岩能力研究。
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