Microscopic image data set of Xujiahe gas reservoir in northeast Sichuan

Xujiahe Formation gas reservoir in northeast Sichuan Basin has good exploration and development potential. In this paper, the microscopic image data of the clastic reservoir of xujiahe Formation gas reservoir in the study area are collected and sorted, and the petrological characteristics, diagenesis, reservoir space and physical properties of xujiahe Formation reservoir are further studied. The reservoir rocks are lithic sandstone, lithic arkose sandstone and quartz sandstone. There are intergranular solution pores, residual intergranular solution pores, intragranular solution pores, clay mineral intergranular (solution) pores and various microfractures in the reservoir space. Through the observation of the cast thin section, the pores are relatively undeveloped, and some thin sections (micro-cracks) are relatively developed. Through thin section identification and observation, the sandstone reservoirs of Xujiahe Formation in the study area have undergone compaction, cementation, dissolution and tectonic fracture. The establishment of this data set can provide a direct way for the comparative analysis and reference of sandstone image data, and can also be used as a standard for the intelligent identification of lithology.