沁水盆地中东部海陆过渡相页岩孔隙结构及分形特征
发布时间:2018-11-19 10:27
【摘要】:为研究海陆过渡相页岩的孔隙结构及分形特征,对采自沁水盆地的12块样品进行了低温氮气吸附、扫描电镜、X-射线衍射和有机质含量等系列分析测试。结果表明,研究区页岩黏土矿物最为富集,石英含量次之,有机质含量平均为2.98%,干酪根类型以Ⅲ型为主。中孔是研究区页岩的主体孔隙,对孔隙体积和比表面积贡献最大。研究区页岩孔隙具有明显的分形特征,利用FHH模型计算得到2种分形维数(D1、D2)。黏土矿物含量与D1、D2具有较好的正相关性,有机质含量与分形维数无明显相关关系。D1和D2具有一定的正相关性,可以共同定量表征页岩孔隙结构的复杂程度和孔隙表面的粗糙程度。分形维数D1、D2越大,页岩孔隙体积和比表面积越大,越有利于气体的富集,但是D2越大孔隙结构越趋于复杂,不利于气体的渗流。分形维数D1越大而D2适中的页岩储集能力较强,且有利于页岩气的开发。
[Abstract]:In order to study the pore structure and fractal characteristics of marine and continental transitional shale, 12 samples from Qinshui basin were analyzed and tested by low temperature nitrogen adsorption, scanning electron microscopy, X-ray diffraction and organic matter content. The results show that shale clay minerals are the most abundant in the study area, followed by quartz content, organic matter content is 2.98%, kerogen type is mainly type 鈪,
本文编号:2342022
[Abstract]:In order to study the pore structure and fractal characteristics of marine and continental transitional shale, 12 samples from Qinshui basin were analyzed and tested by low temperature nitrogen adsorption, scanning electron microscopy, X-ray diffraction and organic matter content. The results show that shale clay minerals are the most abundant in the study area, followed by quartz content, organic matter content is 2.98%, kerogen type is mainly type 鈪,
本文编号:2342022
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