sand porosity

Jurassic reservoir sand body is widely developed in Qiangtang basin. The porosity, permeability and pore structure of sandstone are all worse.

羌塘盆地侏罗系地层厚度大，分布面积广，砂岩储层发育，但砂岩储集物性及孔隙结构普遍较差，现有露头样品分析表明，其储层主要为低特低渗储层。

On the basis of acoustic impedance inversion, sand percentage section and sandstone porosity section are made using time average equation and interpolation formula. These two sections are significant to the extrapolation of logging data under ideal condition.

在波阻抗反演的基础上，利用时间平均方程和内插公式做了砂岩百分含量剖面和孔隙度剖面，这两种剖面在比较理想的条件下，对测井信息的外推有重要参考意义。

Oolite lime sand packs naturally with 40 % porosity because the particles are essentially spheroids.

自然堆积的灰质鲕粒砂具有40%的孔隙度,因为其颗粒其本上都是球状的.

No sand inclusion , porosity, etc on the casting working face.

铸件工作面无砂眼 、 缩孔等缺陷.

Study of Count Model for Porosity of Sand and Gravel

砂卵砾石孔隙计算模型研究