Abstract: Buried hill type oil and gas reservoir is a continuous growth point of reserves in fossil energy exploration in China. However, the extremely strong reservoir heterogeneity brings great difficulties to the study of spatial distribution of dominant reservoirs. From the perspective of petrophysics, the buried hill type reservoir is classified into strong transformation zone, transformation zone and non-transformation zone in vertical direction based on the degree of reservoir transformation, so as to characterize the vertical zoning of different types of buried hills and predict the dominant reservoir. Furthermore, it is subdivided into five sub-zones based on the buried hill development pattern and sedimentary evolution process, i.e., weathering fractured zone, vertical connecting zone, transition zone, horizontal connecting zone and primary zone. The differences of reservoir electrical properties and pore characteristics are summarized and the logging characterization method of vertical zonation of buried hill type reservoir is constructed by using porosity spectrum, acoustic fracture and comprehensive characterization coefficients calculated by logging information. The above method is used to establish the classification standard for vertical zonation of buried hill type reservoirs in Xinjiang, South China Sea and other regions. The application results show that the weathering fractured zone, vertical connecting zone and horizontal connecting zone are favorable for the development of dominant reservoir. The plane distribution law of the dominant reservoir in Tabei area shows that, from northeast to southwest, the thickness in the weathering fractured zone increases first and then decreases, that in the vertical connecting zone decreases gradually, and that in the horizontal connecting zone increases gradually.