Tight sandstone gas reservoir identification method

The invention relates to a tight sandstone gas reservoir identification method, and belongs to the technical field of oil and gas reservoir exploration and development. According to the tight sandstone gas reservoir identification method, on the basis of original drilling data (field logging data and gas testing data), the tight gas content index is obtained through parameter reconstruction, and the geological significance of the tight gas content index is the characterization index of the gas content of a reservoir; establishing a corresponding relation between the fluid property in the research area and the tight gas containing index and the interval transit time average value; and finally determining the fluid property of the target interval according to the tight gas containing index and the interval transit time average value of the target interval. The tight sandstone gas layer identification method can provide effective guidance for oil-gas exploration, evaluation and development, can improve the effic