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到目前为止,已经提出了许多种用电测井数据估算储层渗透率的关系式。不幸的是,在这些关系式中没有一种是普遍有效的,因为每一种关系式都强烈地依赖于局部岩性以及井中的储层流体分布和性质。因此,需要开发一种适用于尼日尔三角洲盆地中储集岩的关系式。应用多重回归分析,作者提出了用测井孔隙度和束缚水饱和度表示东尼日尔三角洲疏松砂岩渗透率的经验公式。用218组实测数据对先前提出的那些关系式和这种新关系式作了比较,发现用新提出的关系式估算的渗透率精度较高。如果其它产油区的储集岩和流体性质与东尼日尔三角洲地区疏松砂岩相似的话,那么这个关系式对该产油区也可能有效。
So far, many kinds of relational formulas for estimating reservoir permeability have been proposed. Unfortunately, none of these relationships is universally valid, as each relationship strongly depends on local lithology and reservoir fluid distribution and properties in the well. Therefore, there is a need to develop a relationship suitable for reservoir rocks in the Niger delta basin. Using multiple regression analysis, the authors present an empirical formula that expresses the permeability of unconsolidated sandstone in the East Niger Delta using log porosity and irreducible water saturation. 218 sets of measured data were used to compare the previously proposed relationships with this new relationship and found that the accuracy of permeability estimated using the newly proposed relationship was high. If other oil-producing areas have reservoir rocks and fluid properties similar to unconsolidated sandstones in the East Niger Delta, then this relationship may also be valid for this oil-producing area.