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。
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。
On the contrary, size distribution and fractal dimension of particulate matters in backwash water were more important in determining specific cake resistance and permeability.
相反，大小分布和颗粒物的分形维数的反冲洗水在确定特定的滤饼阻力和渗透率更重要。
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。
The filter action, the feature of filter cake, the damage of core permeability effected by cake and the solving method are researched by the way of dynamic filter experiment.
用动态滤失实验研究了压裂液的滤失行为，滤饼的性质，滤饼对岩心渗透率的伤害及其解除方法。
The filter action, the feature of filter cake, the damage of core permeability effected by cake and the solving method are researched by the way of dynamic filter experiment.
用动态滤失实验研究了压裂液的滤失行为，滤饼的性质，滤饼对岩心渗透率的伤害及其解除方法。
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