Relationship of porosity and permeability to various parameters derived from mercury injection-capillary pressure curves for sandstone
Relationship of porosity and permeability to various parameters derived from mercury injection-capillary pressure curves for sandstone
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DOI：
10.1306/bdff87a4-1718-11d7-8645000102c1865d
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发表时间：
1992-02
期刊：
影响因子：
3.5
通讯作者：
E. Pittman
中科院分区：
文献类型：
--
作者：
E. Pittman
从压汞试验中估计的孔径大小已用于评价圈闭的封印和解释地层油气聚集的位置。然而，汞注射试验费用昂贵，因此数量不多。本文从岩心常规分析出发，建立了估算某些孔径参数的经验方程。采用多元回归方法，建立了孔隙度、未校正渗透率与压汞-毛细管压力曲线各参数之间的关系，这些参数来自于14个地层的202个砂岩样品，年龄范围从奥陶系到第三系。这些砂岩的组成和质地各不相同。一系列经验推导的方程也允许计算孔径半径对应于汞饱和度值，范围从10%到75%，增量为5。这使得利用岩心分析的孔隙度和渗透率构建计算孔径半径分布曲线成为可能。
Pore aperture size estimated from mercury injection tests has been used to evaluate seals for traps and to explain the locations of stratigraphic hydrocarbon accumulations. However, mercury injection tests are expensive and therefore not abundant. This paper develops empirical equations for estimating certain pore aperture size parameters from routine core analysis. The relationship of porosity, uncorrected air permeability, and various parameters derived from mercury injection-capillary pressure curves was established using multiple regression on a database of 202 samples of sandstone from 14 formations that range in age from Ordovician to Tertiary. These sandstone formations vary in composition and texture. A series of empirically derived equations also permits the calculation of pore aperture radii corresponding to mercury saturation values that range from 10 to 75% in increments of five. This makes it possible to construct a calculated pore aperture radius distribution curve using porosity and permeability from core analysis.