... 2.theorems of mean value (the law of the mean)(中值定理) 1.median grain diameter(粒度中值) 619 median formation sand grain size地层砂 ...
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利用钻井取心分析化验结果和粒度中值，计算地层束缚水饱和度。
We use analyzed results of drill cores and median grain diameter to compute bound water saturation of formation.
粒度中值和泥质含量与储层物性密切相关，胶结物对孔隙度的影响大于对渗透率的影响。
Middle grain size and mud content have great influence on reservoir properties. the influence of cements on porosity is greater than that on permeability.
粒度中值的确定方法较多，包括粒度分析（激光法、筛析法）、薄片粒度分析及应用测井资料计算粒度中值。
There are many means to detenninating median size, including grain size analysis, thin section and log information.
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