The mud cake which permeability is very low can prevent mud filtrate from invading further the formation.
泥饼的渗透率较低，能阻止泥浆滤液进一步渗入地层。
When mud cake is thick, formation permeability and shear wave slowness evaluated from the attenuation of the amplitude of Stoneley wave are wrong.
当泥饼层较厚时，用斯通利波幅度衰减估算的地层渗透率及提取的横波时差是错误的结果。
Hereby, a scientific conception of mud cake to agglomerated cake (MTA) is proposed to solve the problem, and the research methods and key technology are discussed.
据此提出了泥饼仿地成凝饼(MTA)解决固井二界面问题的科学构想，并阐述了MTA的研究方法和技术关键。
The drilling resistance of the Erkaijing well in oil field of north Shanxi is caused by hydration expansion of mud stone and mud cake deposition of porous sandstone.
陕北油石二开井段遇阻的原因为泥岩的水化膨胀和孔隙性砂岩的泥饼沉积。
Its main effect is inhibiting clay shale hydration expansion, improve the quality of mud cake, protecting reservoir, also has the very good control effect of collapse.
它的主要作用是抑制泥页岩水化膨胀，改善泥饼质量，保护油层，同时也具有很好的防塌效果。
Abstract: the drilling resistance of the Erkaijing well in oil field of north Shanxi is caused by hydration expansion of mud stone and mud cake deposition of porous sandstone.
文摘：陕北油石二开井段遇阻的原因为泥岩的水化膨胀和孔隙性砂岩的泥饼沉积。
The disadvantage of API filtration test to evaluate mud cake quality is analyzed. A method, taking mud cake strength, permeability and thickness as main evaluation factors is introduced.
分析了API滤失试验的缺点和确定泥饼质量的关键因素，介绍了用泥饼强度、泥饼渗透率和泥饼厚度评价泥饼质量的试验方法。
The resistivity of flushed zone and thickness of mud-cake can be obtained conveniently and accurately with the new interpretation chart.
这种新的解释图版可以同时交会出冲洗带电阻率和泥饼厚度，较现有的解释图版更加方便、准确。
The resistivity of flushed zone and thickness of mud-cake can be obtained conveniently and accurately with the new interpretation chart.
这种新的解释图版可以同时交会出冲洗带电阻率和泥饼厚度，较现有的解释图版更加方便、准确。
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