气层“两度”是指有效孔隙度与原始含气饱和度，它是计算天然气储量的重要参数。
The effective porosity and original gas saturation of gas reservoir are the important parameters in calculating gas reserves.
在储量计算的有关参数中，有效储层下限的确定直接影响有效储层厚度、孔隙度和含气饱和度三个参数。
The corroboration of effective reservoir lower limit in reserves calculation respects parameters influence effective reservoir thickness, porosity and gas saturation directly.
利用克里金估计方法求取了地层的层面深度和有效厚度，利用高斯场模拟方法求取了孔隙度、渗透率、含气饱和度的空间分布。
The top strata surface and net thickness were obtained by Kriging method. The spatial distributions of porosity, permeability and gas saturation were obtained by simulation of Gaussian field.
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