The reservoir heterogeneity of clastic reservoir of the Shahejie Formation in Dongying Sag is analyzed based on the macro and micropetrophysical characteristics. There are various types of the reservoir sandbodies in the  Shahejie Formation. Statistic analyses on the macropetrophysical properties indicate that porosity and permeability with different genetic types are quite different in their distribution. Sandstones of the fluvial facies, subaquaeous distributary channel of(fan)deltafront facies and mouth bar facies are the best reservoirs. The porosity distribution of the different microfacies is generally characterized by a normal distribution. The sandbodies of deltafront mouth bar and subaqueous distributary channel have larger peak value of porosity. Heterogeneity parameters indicate that the heterogeneity of subaqueous distributary channel of(fan)deltafront is the most serious. Synthetic analyses have been made on the various micro heterogeneous parameters and the porosity texture of the reservoir is divided into 5 types. The reservoir with large pore and moderatethin throats is the best one which is developed in the lower part of subaquaeous dietributary channel of(fan)delta and the mediumfine grained sandbodies of mouth bar. Results of the heterogeneity researches can be correlated with the field testing results  quite well. Thus they have significant implications for the further petroleum exploration and waterinjection exploitation.