巧解砂岩分类三角图

在充分对比砂岩等边三角形和等腰三角形两种分类方案投点图的基础上,尝试从两种不同的思路对砂岩三角形分类方案投点图计算模型进行了推导,即直线方程推导模型和相似三角形推导模型,提出了更为简单的砂岩分类三角图投点计算模型。该计算模型只与石英和岩屑的含量有关,而与三角图本身的形状(等腰或等边三角形)没有直接的关系。再根据Microsoft Excel所提供的逻辑函数建立了砂岩类型的自动识别模型,使大数据量砂岩的分类统计变得更加准确而快捷。最后通过对大数据量储集砂岩骨架组分的定量实例研究,验证了所建立的砂岩分类自动识别模型,以及砂岩分类三角图投点简化计算模型的良好效果。

Further calculating plots in a triangle for the classification of sandstones

This paper provides further calculating plots in a triangle for the classification of sandstones. By comparison and study, the authors got the following conclusions: (1) Based on contrasting the triangle of equilateral with that of isosceles for the classifications of sandstones, the further calculating model is simplified as XR Q/2, YQ, which is deduced by two theories of the linear equation and the similarity triangles. The formula is just relevant to the value of Q and R, but not to the type of triangle(whether the isosceles triangle or the equilateral triangle)directly; (2) Using the logic function,the automatical discriminant model for the classification of sandstones is established by Microsoft Excel.This method is very convenient for the large data; (3) The quantitative instances research for the large data of composition in a triangle for the classification of reservoir sandstones has proved the favorable effect of the automatical discriminant model and the simplified formula for the classification of sandstones.