Three-dimensional geological modeling of shale gas reservoirs can reveal the characteristics of reservoirs and physical parameters, which is of great significance for shale gas exploration and development. In this paper, the shale of Dalong Group in Lianyuan Depression in central Hunan Province is selected as the research object, and the ground level interpolation method is used to realize the three-dimensional geological modeling of shale gas reservoir, and the shallow shale gas reservoir in Lianyuan is compared with the typical shale gas reservoirs in central Hunan Depression, to summarize the characteristics of the shallow layer and analyze the developability. On this basis, the quantitative analysis method of physical properties of shale gas reservoirs was further optimized. The results show that the mineral composition and physical characteristics of the Dalong Formation at different depths are basically the same. The Dalong Formation in Lianyuan, Hunan Province, has high organic matter abundance and good organic matter type, belongs to the over-mature stage, has the physical characteristics of low porosity and low permeability, and its main gas-bearing type is adsorbed gas, and the brittleness of the reservoir and the geostress conditions are similar to those of the deeper layers, which indicates that the shallow Dalong Formation of Lianyuan has good exploitability, and it is a favorable direction for shale gas development. The results of this paper and the proposed evaluation grading standard can provide an important basis for the precise evaluation of shale reservoirs and the selection of favorable zones in Hunan Province.
