The fine reservoir description technology based on logging facies patterns is constantly developing and widely used in oil and gas field development. Due to the limited categories of logging facies patterns, fewer identification parameters, and more similar characteristic curves, it is difficult to distinguish the relationship between facies zones, which has a significant impact on the accuracy of microfacies division and sand body identification. The scale and morphology of sand body development are also difficult to grasp. Guided by sedimentary patterns and based on the identification results of previous core wells, following the Analytic Hierarchy Process (AHP) theory, starting from the precise description of reservoir practice and results, fully considering the division and genesis relationship of facies zones, a composite facies zone single sand body identification method starting from macro patterns is proposed to clarify the attribution relationship of facies zones, clarify the genesis relationship of sand bodies, and fine identify sedimentary microfacies of reservoirs. This improves the accuracy of sand body prediction and achieves fine characterization of single sand body level reservoirs in the study area. This method provides a more comprehensive basis for identifying and determining the genesis of reservoir sand bodies through phase zone classification, and the description of inter well sand body distribution in the plane or profile is more reliable. It has guiding significance for the spatial distribution combination and internal configuration characterization of sand bodies.