【摘要】 基于四川盆地长宁县双河镇下志留系龙马溪组新鲜露头剖面野外考察,通过SEM、矿物含量等分析,研究龙马溪组页岩岩石学特征、矿物组成特征和储集空间类型,并讨论页岩储集空间的影响因素以及储层矿物组成的特征.结果表明:发育有黄铁矿孔隙、黏土矿物晶间微孔和微裂纹、有机质孔隙、层间页理缝等4种储集空间,岩相类型、矿物组成、成岩作用控制着储集空间;研究区龙马溪组页岩储层矿物特征明显,对页岩气的开采具有重要意义.更多还原

【Abstract】 The shale of Lower Silurian Longmaxi Formation in Changning area of Sichuan Basin is studied for its petrologic characteristics,mineral compositions,types and influencing factors of reservoir space,on the basis of field survey of outcrop profile,along with SEM and mineral content analysis.The results show that four kinds of reservoir space,including pyrite pore,intergranular micropore and microcrack in clay minerals,organic matter pore and interlayer bedding joint are developed in the shale,which are controlled by lithofacies,mineral composition and diagenesis.The obvious mineral characteristics of shale reservoir are of great significance for the exploitation of shale gas in the study area.更多还原