Based on detailed geological data from field investigation, the Longmaxi Formation organic-rich shale was formed in a closed deep stagnant water basin. Its true thickness is 22.26~28.63m, with a trend of increasing from east to west;rich in graptolite fossils. TOC content is 1.16%~4.31%, average 2.06%;kerogen belongs to type I;vitrinite reflectance 1.87%~3.15%, basically belongs to early stage of maturity. Shale reservoir belongs to low porosity, low permeability type, but rich in siliceous matter, brittle minerals content 41.13%~84.95%, average 66.76%, thus in favor of later stage fracturing stimulation. Shale reservoir has better adsorptivity;saturated adsorption amount is 1.24~3.10m3/t, average 2.11 m3/t has high degree linear relationship with TOC content. Longmaxi Formation in the block has moderate buried depth, effective exploration area 540km2. The parametric well shows higher shale gas content, after com⁃prehensively analyzed gas-bearing shale buried depth in the area, structural conditions and surface conditions etc. have selected the core parts of Longjiazhai syncline and Qinganping syncline as shale gas exploration target areas.%通过野外调查获得研究区块详实的地质资料，龙马溪组富有机质页岩形成于封闭的深水滞留盆地，真厚度在22.26～28.63 m，具有自东向西增高的趋势，富含笔石化石；TOC含量在1.16%～4.31%，平均为2.06%；干酪根以Ⅰ型为主，镜质体反射率在1.87%～3.15%，基本处于过成熟早期阶段；页岩储层属于低孔低渗类型，但页岩富含硅质，脆性矿物含量在41.13%～84.95%，平均66.76%，有利于储层的后期压裂改造；页岩储层吸附能力较好，饱和吸附量为1.24～3.10 m3/t，平均2.11 m3/t，与TOC含量具有高度的线性关系。区块内龙马溪组埋深适中，有效勘探面积达540 km2，参数井显示页岩含气量较高，综合分析区内含气页岩埋藏深度、构造条件以及地表条件等因素，优选出龙家寨向斜和青安坪向斜的核部为页岩气勘探目标区。
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