下扬子西部地区Y1井大隆组岩相分类  

Facies Classification of Well Y1 of Dalong Group in Western Regions of Lower Yangtze

作　　者：陈波[1] 张家铭[1] 韩京[1] 

机构地区：[1]长江大学非常规油气湖北省协同创新中心,湖北武汉430100

出　　处：《中国锰业》2017年第1期66-69,共4页China Manganese Industry

基　　金：中海石油(中国)有限公司(CCL2014SHPS0036EXP)资助

摘　　要：相比上扬子地区页岩岩石相而言,对下扬子的研究较少。以下扬子西部地区Y1井二叠系大隆组为研究对象,在野外剖面观察和岩石薄片研究的基础上,通过电子显微镜、全岩矿物分析等方法,识别出大隆组页岩矿物成分主要以石英和黏土矿物成分为主,含有方解石、斜长石、白云石及黄铁矿等。由于页岩岩相分类没有统一的标准,所以通过调研和总结国际、国内页岩岩相分类现状,并结合本地区页岩的特殊性,提出了页岩岩相的划分方案。即以有机碳和硅质含量为依据划分出含碳低硅页岩相、含碳中硅页岩相、含碳高硅页岩相、中碳中硅页岩相、中碳高硅页岩相、高碳低硅页岩相、高碳中硅页岩相、高碳高硅页岩相、富碳中硅页岩相以及富碳高硅页岩相等10种岩石相,其中高碳高硅页岩相、富碳中硅页岩相和富碳高硅页岩相是最有利岩相。There are more about shale lithofacies in Upper Yangtze region with less discussion of lower Yangtze.We have observed the outcrops and cores of Permian Dalong Group of Y1 well in western region of lower Yangtze.The mineral composition is dominantly clastic quartz and clay minerals,including feldspar,calcite,dolomite,pyrite and so on.There is not a unified classifi-cation for the shale lithofacies on the basis of the investigation of the recent classification of shale lithofacies.A comprehensive lithofacies classification scheme combined with the special nature of shale has been suggested in this paper.According to the organic carbon and silicon content of shale,it divided the shale lithofacies into differences:carbon low silicon shale lithofacies; carbon medium silicon shale lithofacies; carbon high silicon shale lithofacies; medium carbon low silicon shale lithofacies; medium carbon medium silicon shale lithofacies; medium carbon high silicon shale lithofacies; high carbon low silicon shale lithofacies; high carbon medium silicon shale lithofacies; high carbon high silicon shale lithofacies; carbon-rich medium silicon shale lithofacies; carbon-rich high silicon shale lithofacies.Of all the lithofacies above.I think high carbon high silicon shale lithofacies、carbon-rich medium silicon shale lithofacies and carbon-rich high silicon shale lithofacies are the most favorable facies.

关 键 词：下扬子 岩石相 有机碳 硅质含量 有利岩相 

分 类 号：P618.13[天文地球—矿床学]