鄂尔多斯盆地延长组砂岩中绿泥石膜的赋存状态及成因

发布时间：2018-07-16 11:33

【摘要】：通过铸体薄片和带有能谱仪的扫描电镜对鄂尔多斯盆地延长组绿泥石膜进行观察与测试,研究其赋存状态、成因与物性的关系。结果表明,绿泥石膜的赋存状态可分为3类5亚类,Ⅰ类绿泥石膜为渗滤黏土转化,Ⅱ1和Ⅱ2亚类绿泥石膜为富铁镁物质溶蚀再结晶,Ⅱ3和Ⅲ2亚类绿泥石膜为富铁镁物质与骨架颗粒溶蚀再结晶,Ⅲ1亚类绿泥石膜为同沉积泥质转化和富铁镁物质溶蚀再结晶形成;绿泥石膜胶结是一种破坏性成岩作用,其充填孔隙、堵塞喉道,使砂岩粒间孔隙的一部分变成微孔隙,导致孔隙度、渗透率以及可动流体饱和度降低,而石英胶结物少是因为孔隙中硅质流体含量不足以沉淀大量自生石英颗粒,并非绿泥石膜抑制石英胶结。
[Abstract]:The chlorite film of Yanchang formation in Ordos Basin was observed and tested by casting thin plate and scanning electron microscope with energy spectrometer. The occurrence state and the relationship between genesis and physical properties were studied. The results show that the existing state of chlorite films can be divided into 3 groups and 5 subtypes. Class 鈪，

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