提为了研究鄂尔多斯盆地石炭—二叠系海陆过渡相页岩气储层孔隙特征，选取页4井、页1井和DT803井海陆过渡相泥页岩样品进行了扫描电镜、低温液氮吸附实验以及相关的地球化学实验，分析了海陆过渡相页岩气储层的孔隙类型、特征及其影响因素。实验结果表明：研究区页岩孔隙以粒间孔和有机质孔最为发育；页岩孔形态以狭窄的平行板状为主，孔隙微观孔径分布范围为1~60 nm，主孔径分布介于1~6 nm和40~60 nm，介孔为孔体积和比表面积的主要贡献者，但微孔对比表面积的贡献不容忽视；有机碳和黏土矿物含量是海陆过渡相页岩孔隙发育的主要影响因素，脆性矿物对孔隙发育影响不明显。%In order to study the pore characteristics of shale gas reservoirs on the eastern margin of Ordos Basin, the authors selected the shale in Ye-1,Ye-4 and DT803 wells for experiments including scanning electron microscope, nitrogen sorption-desorption experiments and related geochemical experiments. Meanwhile, the transitional facies shale pore types, characteristics and influencing factors of gas reservoir were analyzed. The results show that inter-granular pore and organic pores are most developed in the shale, the pore morphology of the shale is mainly in the narrow parallel-plate, the pore size distribution range is 1-60nm, and the main pore size distribution is between 1-6nm and 40-60nm. The mesopores make a major contribution to pores specific surface area and pore volume, the contribution of the micro-pores to the surface area cannot be ignored;the values of organic carbon and clay minerals are the main controlling factors of the pore development, and the influence of brittle minerals on the development of pores is not obvious.
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