Abstract: The 2rd member of Xjiahe formation belongs to a typical tight sandstone reservoir,with characteristics of complex pore structure,poor physical properties and strong heterogeneity.Through statistical study on core data,the fractures in 2rd member of Xujiahe formation are mainly of low angle fractures and horizontal fractures.According to imaging logging and conventional logging data,the reservoirs identification has been carried out.In combination with R/S fractal method,the identification method is good and can provide guidance for exploration and development in the next step.