吉林大学学报(地球科学版) ›› 2021, Vol. 51 ›› Issue (3): 919-926.doi: 10.13278/j.cnki.jjuese.20200041
范雨霏, 潘保芝, 郭宇航, 张丽华
Fan Yufei, Pan Baozhi, Guo Yuhang, Zhang Lihua
摘要: 黏土附加导电性使得岩石导电机理复杂化,影响了测井解释中饱和度计算的准确性。随着石油勘探的发展,测井解释研究者针对特定地区和储层条件的饱和度求解提出了多种导电模型。本文基于贝雷砂岩的数字岩心,构建多种含黏土的砂岩数字岩心,利用有限元方法模拟岩心饱和水时的电导率C0,并将数值模拟C0与5种模型计算C0对比,分析各种导电模型的适用情况。结果表明,黏土体积分数越小,黏土的阳离子交换容量越小,岩石孔隙度越大,公式计算C0越接近数值模拟C0。Doll公式和Indonesia公式计算C0与数值模拟C0接近,基本适用于不同孔隙度、黏土体积分数和阳离子交换容量的情况。
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