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为了运用韦克斯曼-史密茨方程计算储集层含水饱和度,根据岩心分析资料研究了阳离子交换容量值与孔隙度的相关性,建立了相关式,并根据岩样的电性资料确定了泥质砂岩的F*=a/φ_t~(m*)相关式以及n~*与φ_t的相关式。 评价储集层采用自由水体积法。泥质水饱和度用Q_v值估算。最后介绍了评价储层的实例。本方法已编制成计算机程序,在3220机上使用。
In order to calculate the reservoir water saturation by using the Waxman-Smits equation, the correlation between cation exchange capacity and porosity was studied based on the core analysis data, and the correlation formula was established. Based on the electrical data of the rock samples, The correlation of F * = a / φ_t ~ (m *) and the correlation of n ~ * and φ_t for shaly sandstone are shown. Evaluation of the reservoir using free water volume method. Argilly water saturation is estimated using the Q_v value. Finally, an example of reservoir evaluation is introduced. This method has been compiled into a computer program and is used on the 3220 machine.