Abstract: The mostly reservoir space of Bioclastic Limestone Member reservoir are composed by dolomite intercry salline pore, sandstone's intergranular pore, cave and crack in central Tarim basin. The reservoir qualities of sandstone and dolomites are better than limestone. Sedimentary environment, diagenesis and structures are main factors affecting reservoir quality. According to the characteristics of carbonate rock reservoir's pore- structure,the Bioclastic Limestone Member reservoir can be divided into four types, and clarifying distributing area and distributing layer. Based on comprehensive factors analysis of sedimentary facies, diagenesis structures and reservoir characteristics, we evaluated and predicted the advantaged reservoir area of Bioclastic Limestone Member in central Tarim basin, divided it into four type areas, type I is the best area of the Bioclastic Limestone M ember reservoir condition, it is a first choice area for strengthening exploration efforts in future too.

Key words: Tarim basin, Carboniferous, Carbonate, Reservoir, prediction