According to the basic concept of Gamma function andГ'(x) distribution, this paper gives out some expression including rnprobability density, distribution function and basic numeric characteristic value. Application of the maximum-likelihood es rntimation method, the paper derives analytic formulae of unknown parameter estimation value and k0. The application of rnlog data of middle of the third segment in linnan oilfield, we calculate its permeability. The result is right. The result prornrides the basis for programming oilfield development plan and forecasting productivity.%依据Gamma函数及Г(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、rn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Г(x)型分布未知参数估rn计值 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rn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。
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