摘要
采用地球化学与沉积学理论方法并结合元素分析、高分辨扫描电镜等实验技术手段,以中国典型陆相断陷湖盆泌阳凹陷为例,探讨了页岩中有机质发育特征、形成环境及富集影响因素,研究表明富有机质页岩中有机质是页岩油形成的物质基础,决定着页岩的生烃潜力和生烃量;有机质主要来源于低等的浮游藻类,有机质发育环境主要为缓慢沉积的、干旱-半干旱的还原条件下、具有中等-高生产力的咸水湖泊环境;无定形有机质是有机质的主要赋存形式;生烃作用产生大量有机质孔隙能为页岩油提供有效的储集空间;古环境决定了有机质保存条件,沉积相带控制有机质富集的平面展布。
By adopting the method of geochemistry and sedimentary theory,and combined with elemental analysis,experimental technology means such as high resolution scanning electron microscopy(sem),the discussion on organic matter development characteristics,forming environment and en-richment factors have been carried out by taking Biyang sag,the typical continental fault lacustrine basin as an example,which provides a good guidance for shale oil exploration.Research results indicate the organic matter in the shale is the material basis of the formation of shale oil,which determines the hydrocarbon generation potential of shale and amount of hydrocarbon generation.The organic matter mainly comes from the planktonic algae;low development environment of organic matter is mainly for slow deposition,reduction of drought-semi-arid conditions,medium-high productivity saltwater lake environment.Amorphous organic matter is the main form of organic matter,and the organic matter in the pore is due to the effect of hydrocarbon generation of organic matter,which can provide effective reservoir space for oil shale.The paleo-environment determines the preservation conditions of organic matter,plane distribution of sedimentary facies have the control effect on the organic matter enrichment.
出处
《石油地质与工程》
CAS
2015年第6期11-14,141,共4页
Petroleum Geology and Engineering
关键词
泌阳凹陷
页岩油
富有机质页岩
有机质特征
古环境
富集影响因素
Biyang sag
shale oil
rich organic shale
characteristics of organic matter
paleo-environment
influencing factors of enrichment
