The clastic rock reservoirs of Upper Devonian and Silurian and the carbonate reservoirs of Middle and Lower Ordovician are mainly distributed in the peri-cline area around central Tarim basin.

• 塔中围斜区主要分布有上泥盆统东河砂岩、志留系碎屑岩储层,以及中、下奥陶统碳酸盐岩储层。