Abstract: Songkan formation cores of Anye-1 well and outcrops, together with geochemistry, petrology and reservoir of Songkan formation shales, show dark gray thin-layered calcic shale interbeded with granular argillaceous limestone, with a rising lime and falling siltstone upwards. The TOC of Songkan formation in Anye-1 well district is generally lower than 1.0%, most at 0.1%. Its organic matters of calcic sandy mudstone are type II1, implying a higher thermal evolution with maturity at 2.75%-2.92%, average at 2.85%. The highly-interbeded mudstone and limestone can form a sealing layer in preserving shale gas. The horizontal cracks develop in mudstone, not in limestone, which is closely related to higher gas content indicated by the on-site tests. Although the organic carbon is not high in its mudstone and limestone, the gas has been enriched due to the sealing interbeded limestone. 

Key words: Anye-1 well, sedimentary environment, geochemistry, crack features, reservoir formation model 

摘要： 文章通过分析安页1井松坎组岩心及井区周缘露头，再结合松坎组泥页岩的地球化学、岩石矿物学、储集特征以及含气性特征的分析研究，发现安页1井松坎组岩性以深灰色薄层钙质页岩与颗粒泥质灰岩互层为主，从底到顶灰质含量逐渐增高，粉砂质含量逐渐降低。安页1井松坎组TOC含量普遍低于1.0%，多分布在0.1%左右，镜检显示松坎组含钙砂质泥岩的有机质类型为Ⅱ1型，有机质热演化程度较高，成熟度在2.75%～2.92%，平均2.85%，松坎组泥岩与灰岩频繁互层，能形成有效的隔档，有利于页岩气的保存。泥岩水平裂缝发育，灰岩裂缝不发育，从现场解吸数据和气测异常可以看出高的含气量与泥岩发育的水平裂缝关系密切。安页1井松坎组地层的特殊性致使该地层尽管泥岩与灰岩的有机碳含量不高，但是生成的天然气由于频繁互层灰岩的遮挡而有效聚集。 

关键词: 安页1井；沉积环境；地球化学特征；裂缝特征；成藏模式