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电阻率是在地下水勘探中通常采集的地球物理测井数据之一。由于电流响应反映地层电特性和孔隙空间特性的变化,因此通常利用电阻率数据与自然伽马数据来定性解释流体特性的变化以及探测富含黏土的储层。本文介绍了一种更好的定量方法,该方法利用电阻率数据界定传递特性,使得在总孔隙度一电阻率图中只存在单一的上限。这一新的上限是以在渗流门限孔隙度φP和临界孔隙度φC处计算得到的理论上的Hashin-Shtrikman(HS)界限为基础。该计算方法很简单,而且较Hashin-Shtrik-man(HS)界限的理论值相对低一些。
Resistivity is one of the most commonly used geophysical logs collected in groundwater surveys. Since the current response reflects changes in formation electrical properties and pore space properties, resistivity data and gamma ray data are often used to qualitatively interpret changes in fluid properties and to detect clay-rich reservoirs. This article presents a better quantitative method that uses resistivity data to define the transfer characteristics such that there is only a single upper limit in the total porosity-resistivity diagram. This new upper bound is based on the theoretical Hashin-Shtrikman (HS) bound calculated at the seepage threshold porosity φP and the critical porosity φC. This calculation is straightforward and relatively less theoretical than the Hashin-Shtrik-man (HS) bound.