渝东南地区下古生界富有机质页岩有机岩石学特征

渝东南下古生界主要发育牛蹄塘组和五峰-龙马溪组两套富有机质页岩：五峰-龙马溪组岩心样品显微组分总含量TMC值为0.6%-1.2%,牛蹄塘组岩样TMC值为0.7%-2.2%。页岩富氢显微组分主要为腐泥组和壳质组,其中矿物沥青基质、藻类体和壳屑体是下古生界页岩主要生烃组分,对油气生成贡献最大渝东南下古生界富有机质页岩热演化程度处于过成熟—极高过成熟阶段,等效镜质体反射率（VRO）为2.25%-5.18%。本文应用全岩有机岩石学分析技术,系统研究了2套页岩的显微组分组成、分布特征、主要组分对生烃的贡献以及有机质热演化程度,希望为该区页岩气的勘探与开发提供进一步的证据支持。...

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Published in地质与勘探 Vol. 52; no. 2; pp. 346 - 356
Main Author 范文斐 侯读杰 底萌卿
Format Journal Article
LanguageChinese
Published 2016
Subjects
下古生界
富有机质页岩
渝东南
生烃组分
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ISSN0495-5331

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Summary:渝东南下古生界主要发育牛蹄塘组和五峰-龙马溪组两套富有机质页岩：五峰-龙马溪组岩心样品显微组分总含量TMC值为0.6%-1.2%,牛蹄塘组岩样TMC值为0.7%-2.2%。页岩富氢显微组分主要为腐泥组和壳质组,其中矿物沥青基质、藻类体和壳屑体是下古生界页岩主要生烃组分,对油气生成贡献最大渝东南下古生界富有机质页岩热演化程度处于过成熟—极高过成熟阶段,等效镜质体反射率（VRO）为2.25%-5.18%。本文应用全岩有机岩石学分析技术,系统研究了2套页岩的显微组分组成、分布特征、主要组分对生烃的贡献以及有机质热演化程度,希望为该区页岩气的勘探与开发提供进一步的证据支持。
Bibliography:11-2043/P
Lower Palaeozoic in Southeast Chongqing develops two sets of organic-rich shales--Niutitang and Wufeng-Longmaxi Formation. By means of whole-rock analysis of organic petrology,the maceral composition,distribution characteristics,contribution to hydrocarbon generating and thermal evolution of organic matter of organic-rich shale of lower palaeozoic in southeast chongqing have been studied, which could provide further evidence for the exploration and development of shale gas in the area. The total maceral contents （ TMC） of Wufeng-Longmaxi and Niutitang Formation are 0.6-1.2% and 0.7-2.2% respectively. The hydrogen-rich macerals of these shales are mainly composed of exinite and sapropelinite. It is suggested that mineral bituminous groundmass , alginite and liptodetrinite are the main hydrocarbon-generating macerals in this region,which contribute most to shale gas generation. Thermal evolution level of organic matter in these organic-rich shales are among over-mature and extremely high over-mature st
ISSN:0495-5331