适应于非均质性储层中低渗透率的Γ(x)型分布  

Γ(x)Distribution of Mid-low Permeability in Heterogeneity Reservoir.

作　　者：朱法银[1] 路秀广[1] 张旭升[1] 

机构地区：[1]胜利油田职工大学

出　　处：《油气井测试》2001年第1期1-3,共3页Well Testing

摘　　要：依据Gamma函数及Γ(x)分布的基本概念 ,给出了非均质性储层渗透率K的概率密度、分布函数以及基本数字特征的表达式。同时 ,应用极大似然估计法推导出Γ(x)型分布未知参数估计值 ^ν和^k0 的解析式。并结合属中低渗透性的临南油田沙三中油层的电测解释资料进行了实例计算 ,其结果与实际吻合 ,可作为编制油田开发方案和产能预测的依据。According to the basic concept of Gamma function and Γ(x) distribution,this paper gives out some expression including probability density,distribution function and basic numeric characteristic value.Application of the maximum likelihood estimation method,the paper derives analytic formulae of unknown parameter estimation value and 0 .The application of log data of middle of the third segment in linnan oilfield,we calculate its permeability.The result is right.The result provides the basis for programming oilfield development plan and forecasting productivity.

关 键 词：非均质油气藏 渗透率 GAMMA分布 极大似然法 

分 类 号：TE312[石油与天然气工程—油气田开发工程]