Abstract: By using statistics such as the core, through calculating the quantitative indexes of Chang 6 area, such as the reservoir permeability heterogeneity parameters, stratification coefficient, sandstone density and drilling encounter rate, from three directions, namely a layer, interlayer and plane, the reservoir heterogeneity degree was studied. Ultimately, according to the plane of oil saturation to discuss the relationship between reservoir heterogeneity and oil-bearing property. The results show that under the influence of sedimentary environment and diagenesis, the two sub-layers of Chang 6 reservoir in Jiyuan area(Chang 61 and Chang 62) are highly heterogeneous, and the plane heterogeneity is prominent. There is a strong correlation between oil and gas properties of reservoir and distribution characteristics and physical properties of sand body. That is to say, the channel area with the best physical properties and the largest sand body thickness has the highest oil saturation and the best oil and gas properties.