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由压汞实验估算的孔隙开口大小已被用来评定储油构造的密封性,并用来解释地层中烃类聚集的位置。但是,压汞实验费用很高,因此压汞实验数据并不是很多的。本文从常规岩芯分析出发,提出了估算某些孔隙开口大小参数的经验方程。我们对奥陶纪到第三纪的14个构造中的202个砂岩样品的数据库数据加以多项回归分析,建立了孔隙度、未校正的空气渗透率与从压汞毛细管压力曲线导出的各种参数之间的关系。这些砂岩地层的组成和纹理都是不同的。由经验导出的一系列方程式还可用来计算与汞的饱和度值相对应的孔隙开口半径,相应的压汞饱和度范围从10％～75％,每次增大5％为一级。这样用从岩芯分析得到的孔隙度和渗透率就可以画出计算的孔隙开口半径分析曲线。
The size of the pore opening, as estimated by mercury intrusion experiments, has been used to assess the tightness of oil-bearing formations and to account for the location of hydrocarbon buildup in the formation. However, the cost of mercury intrusion experiments is very high, so there are not many mercury intrusion experiments. Based on the conventional core analysis, this paper presents an empirical equation for estimating the size of some pore openings. We performed multiple regression analysis of database data for 202 sandstone samples from 14 structures of the Ordovician to Tertiary to establish the relationships between porosity, uncorrected air permeability and the various derived from the mercury injection capillary pressure curve The relationship between parameters. The composition and texture of these sandstones are different. A series of empirically derived equations can also be used to calculate the pore opening radius corresponding to the mercury saturation value, with corresponding mercury intrusion saturations ranging from 10% to 75% for each increase of 5%. The calculated pore opening radius analysis curve can thus be drawn using the porosity and permeability obtained from the core analysis.