论文部分内容阅读
根据岩芯、测井求取的渗透率和粒度中值等参数变化的特点，将冷东地区沙三段Ⅱ油组划分出正韵律（Ａ）、反韵律（Ｂ）、复合韵律（Ｃ）和均质韵律（Ｄ）４大类２０小类非均质模式。在４种沉积微相中，模式Ａ，Ｃ，Ｄ分别在相Ⅳ、相Ⅱ、相Ⅲ和相Ⅰ中所占比例最高，模式Ｂ则在各微相中差别不大。从相Ⅰ到相Ⅳ砂砾岩厚度减薄，泥质含量增加，粒度中值变小，渗透率增加。从相Ⅰ到相ⅢＶｋ值由小变大，非均质性逐渐增强，相ⅣＶｋ值最小，非均质性较弱。
According to the characteristics of core, logarithm permeability and median grain size, the oil group of the third member of Shahejie Formation in Cold East Area is divided into positive rhythm (A), reverse rhythm (B), complex rhythm (C) And homogeneous prosody (D) 4 categories 20 sub-categories of heterogeneous patterns. Among the four sedimentary microfacies, the patterns A, C, and D have the highest proportions in Phase IV, Phase II, Phase III and Phase I, respectively, and Mode B is the least in all microfacies. From Phase Ⅰ to Phase Ⅳ, the thickness of conglomerate decreases, the content of shale increases, the median size decreases, and the permeability increases. From Phase Ⅰ to Phase Ⅲ, the value of Vk changes from small to large, the heterogeneity gradually increases, the phase ⅣVk has the minimum value and the heterogeneity is weak.