The better the pore structure of reservoir, the higher the tested productivity and the critical water saturation, the lower the correspondent cutoff of effective porosity.
储层孔隙结构越好，测试产能越高，临界水饱和度越高，其对应的有效孔隙度下限越低。
The formation test method and irreducible water saturation method are two new methods used to determine the low limits of effective reservoir physical properties.
试油法和束缚水饱和度法是确定有效储层物性下限的两种新方法。
It is found that the oil effective permeability of low middle porous sandstone is related with the porosity, water saturation and shale volume of formation.
研究发现，油的有效渗透率与中低孔隙性储层的孔隙度、含水饱和度及泥质含量有关。
Initial oil saturation is controlled by the reservoir boundary and structural. Parts of the reservoir with high initial water saturation dose not form effective edge and bottom water drive.
含油饱和度受油藏边界和构造形态控制，油藏南部边缘和局部构造低部位原始含水饱和度高，但不形成有效边底水驱动。
Initial oil saturation is controlled by the reservoir boundary and structural. Parts of the reservoir with high initial water saturation dose not form effective edge and bottom water drive.
含油饱和度受油藏边界和构造形态控制，油藏南部边缘和局部构造低部位原始含水饱和度高，但不形成有效边底水驱动。
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