The Sedimentary Facies and Coal Measures Source Rock Distribution of Yacheng Formation in Yabei Sag, Qiongdongnan Basin
详细信息
- 责任者：Wu Yukun (Key Laboratory of Exploration Technologies for Oil and Gas Resources ; Ministry of Education ; Yangtze University ; Wuhan 430100 ; China) ; Hu Mingyi
- 刊名：Natural Gas Geoscience
- 出版年：2013
- 卷期：24(3)
- 关键词：烃源岩 ; source rocks ; 沉积相 ; sedimentary facies ; 琼东南盆地 ; Qiongdongnan Basin
- 页码：p.582-590
- 图表：9 illus., 32 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
The primary source rock of Yabei Sag was coal measures of Yacheng Formation in Oligocene and its distribution was controlled by sedimentary facies.According to the analysis of regional geological setting,paleontology,lithology assemblage,tectonic feature,paleo-topography etc,the sedimentary facies of Yacheng Formation are mainly tidal flat,lagoon and partly fan-delta.The tidal flat grows on the place where the slope is gentle and the topography is broad.Sporopollen analysis showed that there were a lot of mangrove trees in Yabei Sag during the period,which could form coal after death.The relative closed hydrodynamic condition in the sag is favorable for the formation of coal measures.Therefore,tidal flat bears favorable conditions for the formation,accumulation and preservation of coal measures and is a favorable sedimentary facies belt for the development of coal measures source rocks.Tidal flat in the Yabei Sag is mainly developed in the south and southeast gentle slope.Yacheng Formation in the southeast gentle slope has greater burial depth and higher thermal maturation of organic matter,indicating the formation of oil and gas.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |