Affected by the effect of sedimentation，diagenesis， and tectonism，the plane heterogeneity of reef bank reservoir are serious. And as the reef bank reservoir is characterized by various pore types and complex relationship between Porosity and Permeability，seismic prediction of reservoir permeability has long been a major challenge. In addition，the quantitative characterization of plane heterogeneity of reservoir is also a major challenge，due to lack of characterization parameter and characterization method of reef bank reservoir. Taking Puguang gas field for example，through analyzing the controlling effect of the reef bank reservoir heterogeneity，five reservoir parameters including percentage of granular rock thickness，number of interlayer， porosity， matrix permeability and fracture permeability are introduced to calculate the heterogeneity parameter，by using main factor analysis method in statistics. According to the complex relationship between porosity and permeability of reef bank reservoir，frame flexibility factor is introduced to evaluate logging interpretation and seismic prediction permeability finely. On the basis of plane heterogeneity evaluation using traditional mathematical statistics method，the plane heterogeneity of reef plat reservoir is quantitative evaluating by geological modeling technology，which uses seismic predicting permeability and sedimentary facies as constraint. The research achievements have guide the development dynamic analysis and measure plan formulation finely，and have important significance in gas field development.