The Devonian sequences are distributed in Tuoputai industrial zone in Tahe area, where the sand bodies are in general spreading nearly in SN, thick in NW and thin in SE. The reservoir is characterized by primary granular pores, granular corrosion pores, intergranular corrosion pores, with a few other pores. The reservoir channel sorting belongs to mediate to poor. Most channels are thin. Donghe sandstone reservoir develops compaction, cementation and corrosion. According to reservoir features and evaluation codes, the reservoir is classified into three types, which have been evaluated individually.