摘要
提出了一种确定油田渗透率分布规律的解析方法，从而克服了以往用图版拟合确定渗透率分布的缺点。其方法是：首先用概率统计方法统计出油田渗透率分布的均值Ｅ（ｋ）（或Ｅ（ｌｎｋ））和Ｅ（ｋ２）（或Ｅ［（ｌｎｋ）２］），并且利用这二个均值计算出常用的４种理论渗透率分布类型（ Γ（ ）型、Γ（ｘ）型、Γ（ｘ２）型和对数正态分布型）的分布参数；然后计算出４种理论分布与实际分布的方差值∑［ｆＮ（ｋｉ）－ｆ（ｋｉ）２，选择其方差值最小的理论分布类型作为该油田的渗透率分布类型。
An analytic method determining the distribution of permeability is presented,which is superior to the curve matching method. Permeability distribution types for a certain reservoir can be obtained. Firstly, the mean values of permeabilities can be counted with statistics method. Then the distribution parameters for the four kinds of theoretic permeability distribution type used extensively can be determined using these mean values. The square errors of distribution function for the four kinds of type can also be determined. The type which has the minimum square error of distribution function is what we want to seek for a certain reservoir.
出处
《江汉石油学院学报》
CSCD
北大核心
1995年第2期74-78,共5页
Journal of Jianghan Petroleum Institute
关键词
油藏工程
渗透率
分布函数
oil reservoir engineering
permeability
statistics
distribution function
fitting
