Abstract: Based on the charging simulation experiment, this paper analysed the accumulation process of tight sandstone gas from Sulige and Yulin gas fields in Ordos basin, and also established a natural gas accumulation pattern. The starting pressure is existed in the tight sandstone gas, while such a charging is mainly non Darcy’s flow instead of following to Darcy Law. The porosity and permeability cutoff values of the accumulation physical property in tight sandstone gas are respectively1.5%and0.03mD, their upper cutoff values are respectively10.0%and1.0mD. Combined with production practices, further determination of the porosity and permeability cutoff values of industrial gas flow are4.0%and0.07mD, respectively. Three stages of the natural gas accumulation in tight sandstone are proposed, namely, relatively slowly charging stage of non?Darcy flow, relatively rapidly charging stage of non?Darcy flow, and stable stage of gas saturation while natural gas charging reaches limit gas saturation. The relatively slowly charging stage of non?Darcy flow is a major stage of charging accumulation among them