川东鄂西晚二叠世长兴期沉积相与生物礁含油气有利相带特征探讨

APPROACH ON SEDIMENTARY FACIES AND REEF WITH FAVOURABLE HYDROCARBON BEARING FACIES BELTS IN CHANG XING SERIES OF UPPER PERMIAN IN EASTERN SICHUAN AND WESTERN HUBEI

刘大成 李书舜

Liu Dacheng Li Shushun

地质矿产部西南石油地质局

Southwest Bureau of Petroleum Geology, Ministry of Geology and Mineral Resources

笔者根据野外实践和大量数据资料,在综合分析研究的基础上,恢复了川东鄂西长兴期沉积相的基本格局,认识到区内长兴期并不是一个平板式台地,而是存在着较为明显地相分异作用。表现在沉积面貌上,有台地相、台沟相,台盆相,生物滩相。既有浅水相,又有深水相,既有开阔海相,也有局限海相。其中生物礁相又有其特殊的成礁序列和特定的沉积环境,构成了含油气相带,并在油气勘探中证实。

Based on field practice and synthesis and analysis of a vast amount of data,the main pattern of sedimentary facies during Chang Xing period in eastern Sichuan and western Hubei was restored.It is recognized that the area during Chang Xing period was not a flat platform,and there are evi-dences of facies differentiation,including platform facies,platform trough facies,platform-basin facies,and biologic beach facies.There are shallow water facies,as well as deep water facies;and open sea facies,as well as restricted sea facies.The reef is characteristized by special sequence of for-mation and certain sedimentary environment,and hydrocarbon bearing facies belts were formed,which has been proved through petroleum exploration.

https://doi.org/10.11781/sysydz198902152