非均质性是油气藏的基本特性,也是影响油气面采收率的重要因素.它是反映油气藏的渗透率、孔隙度、有效厚度及其连通性的综合特征参数.不同油气藏在投入开发后,其产量随时间变化的分布曲线与油气藏自身的非质均性有密切关系.利用伽马分布描述油气藏产量随时间的变化,研制了典型曲线的理论图版,通过拟会求解,可判断油气藏的非均质程度. Heterogeneity is the basic characteristic of oil and gas reservoirs and also an important factor affecting the oil and gas surface recovery, which is a comprehensive characteristic parameter that reflects the permeability, porosity, effective thickness and connectivity of the reservoirs. After the development, the distribution curve of its yield with time is closely related to the non-homogeneity of the reservoir.Using gamma distribution to describe the evolution of the reservoir yield over time, a theoretical plate of a typical curve is developed, Can determine the degree of heterogeneity of the reservoir.