Abstract: This paper is devoted to quantitatively identify coal structure and study the distribution characteristics of coal structure in Hancheng H3 well group. The drilling coring data and the differences of logging response characteristics of coal seams with different coal structure are analyzed. The method of identifying coal structure with dual parameters of coal structure index (N) and ratio of deep lateral resistivity to micro resistivity R(LLD/MSFL) is established. According to the inversion model, and the logging interpretation of coal structure in 29 wells was completed, and the vertical distribution characteristics of coal structure were clarified. Furthermore, the stochastic modeling method is used to realize the three-dimensional visualization of the spatial distribution characteristics of coal structure using the Petrel2015 three-dimensional geological modeling software. The results show that in No.5 coal seam, N