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利用统计分析的方法,通过编制各类图件研究层内夹层分布规律、层内渗透率非均质程度和渗透率韵律性.研究表明三角洲分流平原亚相典型沉积单元:夹层个数为1-3个,夹层密度平均值为0.149,夹层平均厚度0.2米.变异系数峰值分布在1.20-1.40,主要分布在0.25以下,约81%;突进系数峰值分布在3.2-4.0,主要分布在1.0-1.25,约82%;级差主要分布在9以下,约99%;渗透率非均质程度为均匀型.发育正韵律、反韵律、均质韵律和复合韵律4种渗透率韵律类型.层内非均质程度中等.
By means of statistical analysis, the distribution law of interlayer distribution, the heterogeneity of permeability in the layer and the rhythmicity of permeability were studied through compilation of all kinds of maps.It is shown that the sedimentary unit of subfacies in delta distributary plain is 1- 3, the average interlayer density is 0.149, the average thickness of the interlayer is 0.2m, the peak value of variation coefficient is 1.20-1.40, mainly distributed below 0.25, about 81%; the peak value of the coefficient of protrusion is between 3.2-4.0 and mainly distributed between 1.0-1.25 , About 82%, and the difference is mainly distributed below 9, about 99%. The heterogeneity of permeability is uniform, and four types of rhythm prosody, positive rhythm, homogeneous rhythm and complex rhythm are developed. Medium quality.