The Characteristics of Sedimentary Facies of Tanzhuang Formation of Upper Triassic of Luoyi District

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• 作者：Yue ShaofeiYan DetianLi Xiaopeng
• 会议时间：2013-09-01
• 关键词：delta front ; lithic sandstone ; Luoyi ; Upper Triassic
• 作者单位：Key Laboratory of Tectonics and Petroleum Resources Ministry of Education, China University of Geosciences, Wuhan 430074;Faculty of Earth Resources, China University of Geosciences, Wuhan 430074
• 母体文献：第六届油气成藏机理与油气资源评价国际学术研讨会 论文集
• 会议名称：第六届油气成藏机理与油气资源评价国际学术研讨会
• 会议地点：北京
• 主办单位：中国石油学会
• 语种：chi

摘要

According to the methods of combining field outcrop and drilling data, this paper investigates the sedimentary facies characteristics of Tanzhuang Formation of Upper Triassic in Luoyi District.Through the study of reservoir compositions, petrology, clastic structure and sedimentary structure about Tangzhuang Formation and on the basis of observation and describtion about sedimentary facies of single drilling as well as field outcrop, this paper finally determines characteristics of sedimentary facies of Tanzhuang Formation of Upper Triassic in Luoyi District.The reservoir rock formations in this area are mainly sandstone and feldspathic lithic sandstone detritus with high content of feldspar and debris.The sedimentary structures are aslo identified, such as ripple, bottom scour surface, cross-bedding.The main types of the sedimentary facies in Late Triassic epoch are delta front, shallow lake and semi-deep lake.The delta front mainly developed underwater distributary channel, mouth bar, far and distal bar.Lacustrine facies mainly developed shallow lake mud, shallow lake sand bar, turbidite sand and semi-deep lake mud.Finally this paper determines the sedimentary distribution characteristics of Tanzhuang Formation of Upper Triassic, provides the reliable basis for the work of sedimentology in later exploration.