朱汉卿;贾爱林;位云生;贾成业;金亦秋;

• 1:中国石油勘探开发研究院

摘要(Abstract)：

页岩孔隙结构特征直接影响气体在其中的吸附和运移。以长宁示范区下志留统龙马溪组下部富有机质页岩样品为例,利用场发射扫描电镜(FE-SEM)、低压CO2气体吸附及低压Ar气体吸附等实验,对长宁示范区开发主体层段富有机质页岩的孔隙结构进行定性描述和定量表征。结果表明:长宁示范区富有机质页岩主要发育有机质孔隙,页岩孔隙结构非均质性强,平均比表面积为42.19m2/g,平均孔体积为0.059 1cm3/g,孔径小于2nm的微孔提供页岩60%以上的比表面积,是页岩气主要的吸附场所;孔径大于10nm的介孔和宏孔提供页岩70%以上的孔体积,是页岩气主要的储存场所。改进的气体吸附法可实现对页岩纳米级孔径分布的连续定量表征,研究结果对了解富有机质页岩纳米级孔隙结构特征、评价页岩含气性具有指导意义。

关键词(KeyWords)：龙马溪组;富有机质页岩;孔隙结构;CO2吸附;Ar吸附

Abstract:

Keywords:

基金项目(Foundation):国家科技重大专项(2017ZX05037-002)

作者(Author):朱汉卿;贾爱林;位云生;贾成业;金亦秋;

Email:

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