A set of upper Paleozoic Taiyuan Formation alternating marine-terrestrial facies coal measures argillutite have been devel⁃oped in Hexi Corridor area, Gansu;based on 6 indices of organic matter abundance and category, maturity, effective shale single layer thickness, buried depth, reservoir physical property and shale gas-bearing property carried out shale gas reservoiring prospect evalua⁃tion. The study has shown:the average effective shale single layer is thicker than 50m, maximum 120m;average TOC 3.76%;organic matter type mainly type II, a little type III;vitrinite reflectance (Ro) average 2.77%, in overmature stage, in favor of organic matter pyro⁃lytic gas generation, thus provided with basic geological condition for shale gas reservoiring. Average clay minerals content in shale is 24.6%; brittle minerals 69.5%; average porosity 2.88%, permeability 0.094 × 10-3μm2. Average argillutite adsorbed gas content is 1.33m3/t. From the comprehensively analyzed result studies have considered that the upper Paleozoic Taiyuan Formation shale in mid⁃dle-eastern Hexi Corridor area has good shale gas exploration potential.%甘肃河西走廊地区上古生界太原组发育了一套海陆交互相煤系泥页岩，选取有机质丰度及种类、成熟度、有效页岩单层厚度、埋深、储层物性、页岩含气性6项指标对页岩气成藏前景进行评价。研究发现：研究区有效页岩单层厚度平均大于50m，最厚可达120m；TOC平均为3.76%；有机质类型以Ⅱ型为主，含少量Ⅲ型；镜质体反射率（Ro）平均为2.77%，属于过成熟阶段，有利于有机质热解生气，具备页岩气成藏的基本地质条件。页岩中粘土矿物含量平均为24.6%，脆性矿物含量平均为69.5%；孔隙度平均为2.88%，渗透率平均为0.094×10-3μm2。泥页岩吸附含气量平均为1.33m3/t。综合分析认为河西走廊中东部地区上古生界太原组页岩具有较好的页岩气勘探潜力。
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