中、上扬子区下组合烃源岩有机岩石学特征  

Organic Petrology Characteristics of Lower Assemblage Source Rocks in Upper and Middle Yangtze Region

作　　者：陶树[1] 汤达祯[1] 伍大茂[1] 许浩[1] 陈贞龙[1] 李松[1] 

机构地区：[1]中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室能源学院,北京100083

出　　处：《中国矿业大学学报》2010年第4期575-581,590,共8页Journal of China University of Mining & Technology

基　　金：国家自然科学基金重点项目(40730422);大型油气田及煤层气开发国家科技重大专项项目(2008ZX05034-001);油气沉积地质教育部创新团队项目(IRT0864);中央高校基本科研业务费专项资金项目(2009PY19)

摘　　要：为了了解中、上扬子区下组合高—过成熟烃源岩有机岩石学特征,研究烃源岩生烃母质及各类显微组分的生烃潜力,运用全岩光片、干酪根光片等手段,对川南—黔中和鄂西—渝东地区下组合烃源岩有机显微组分进行特征描述和分类.结果表明:泥质烃源岩中腐泥类有机组分所占比例相对较高,藻类组和动物有机组通常也相对较高,但是次生组分碳沥青则明显较低;地层随层位愈老,烃源岩有机质丰度愈高;动物有机组分含量在川南—黔中地区明显高于鄂西—渝东地区,而碳沥青体和微粒体含量则相反;下组合烃源岩有机质类型均为Ⅰ型.In order to identify organic petrology characteristics of the lower assemblage high-over mature source rocks in upper and middle Yangtze region and analyze the hydrocarbon generating potential of hydrocarbon generation materials and all kinds of maceral,the maceral from the lower assemblage source rocks in Southern Sichuan-central Guizhou and Western Hubei-eastern Chongqing were observed and described by the whole rock surfaces and kerogen light sheets.The results show that the organic matter of sapropel type in the muddy source rocks is relatively in high proportion,and that of algae and animal organic matters are usually relatively higher,whereas that of secondary component-carbon asphalt is much lower.The older the layer is,the more abundant the organic matter in source rocks are.The organic matter content of animal group in Southern Sichuan-central Guizhou area is higher in Sichuan-central Guizhou and Western Hubei-eastern Chongqing area,and the content of carbonaceous asphalt and microsome is opposite.The organic matter type of source rocks is typeⅠ.

关 键 词：有机显微组分 中、上扬子区 下组合烃源岩 有机质类型 

分 类 号：P618.13[天文地球—矿床学] P59[天文地球—地质学]