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本文应用数理统计法研究大庆油田各大开发区不同开发层系的渗透率分布规律,其中大部分符合皮尔逊第三型Γ(x)分布,另一些符合其变态Γ(x~2)分布。萨达洛夫分布是Γ(x)分布自由度为3时的特殊情形;马克士威尔分布是Γ(x~2)分布自由度为3时的特殊情形。 文中还对不同类型分布函数的性质做了理沦分析,它们有着广泛的实用意义。 文章最后给出几种分布规律对无水和最终采收率的影响。
In this paper, we study the distribution law of permeability in different development zones in Daqing Oilfield, most of them conform to Pearson type Γ (x) distribution, while others accord with their metamorphic Γ (x ~ 2) distribution. The Sadalov distribution is a special case when the distribution degree of freedom Γ (x) is 3; the Maxwellian distribution is a special case where the distribution degree of freedom Γ (x ~ 2) is 3. The article also analyzes the nature of different types of distribution functions, which have a wide range of practical significance. Finally, the article gives the distribution of several laws on the water and the ultimate recovery of the impact.