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储层平面非均质性在单层开采，分段开采，逐段上返等油气藏中对开发效果，开发指标的影响往往比垂向非均质性更加显著，文章将渗透率变化作为非均质性的集中表现，把渗透率变异系数等引申到平面非均质性研究中，通过储层宏观非匀质程度和分布特征的实例，研究，分析了平面非均质性对气藏开采动态的影响，认为平面非均质性对边水开采动态有影响，渗透率变异系数与天然气采收率和累积水气比有很好的相关性，平面非均质性分布特征对边水气藏开采也有很大影响，非均质程度相同，高渗透带平行生产井排或气藏长轴分布时天然气采收率最低；高渗透气垂直气藏长轴，天然气采收率较高；高渗透带分散分布的天然气采收主居二者之间，气藏重组分含量越高，受非均质性影响越小，气藏组分中含有非碳氢化合物时，选用PR状态方程可计算得到更准确的天然气体积和凝析体系相态。

INFLUENCE OF LATERAL RESERVOIR HETEROGENEITY ON GAS RESERVOIR DEVELOPMENT PERFORMANCE

The influence of lateral reservoir heterogeneity on the development effectivenesses and development indexes in individual layer production,sectional production and stepwise upward movement production is much more obvious than that of vertical reservoir heterogeneity.In the paper,the change in permeability is taken as the concentrated expression of heterogeneity;the permeability variation coefficient,etc.are introduced into the research on lateral heterogeneity;and the influence of the lateral heterogeneity on gas reservoir production performance is analyzed through a case research on reservoir macrosopic heterogeneity and distribution characteristics.It is thought that the lateral heterogeneity can exert an important influence on edge water gas reservoir profuction performance and the permeability variation coefficient is well related to gas recovery factor and cumulative water gas ratio.The distribution characteristics of the lateral heterogeneity can also exert a tremendous influence on edge water gas reservoir production.For example,in the case of the same heterogeneity,when high permeability zone is parallel to producing well array or distributed along the long axis of gas reservoir,the gas recovery factor is minimum;when the one is vertical to the long axis of gas reservoir,the gas recovery factor is relatively high;and when the one is dispersed,the gas recovery factor value is between the both.The higher the heavy component content in natural gas,the smaller the influence caused by heterogeneity.When non hydrocarbons are contained in gas component,the natural gas volume and the phase state of condensate system may be more accurately calculated by use of PR state equation.