羌塘盆地巴青地区上三叠统巴贡组沉积相及其对油气等资源的控制  

Sedimentary facies and its control over petroleum and other resources of the Upper Triassic Bagong Formation in Baqing area, southeastern Qiangtang Basin

作　　者：谭富荣[1] 杨创[1] 尘福艳 杜芳鹏 刘志武[3] 许将 李居云 陈应涛[2] 罗婷婷 雒铮 范玉海[1] TAN Furong;YANG Chuang;CHEN Fuyan;DU Fangpeng;LIU Zhiwu;XU Jiang;LI Juyun;CHEN Yingtao;LUO Tingting;LUO Zheng;FAN Yuhai(Geological Prospecting Research Institute of ARSC,China National Administration of Coal Geology,Xi'an 710054,Shaanxi,China;College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,Shaanxi,China;College of Earth Science and Resources,Chang'an University,Xi'an 710054 Shaanxi,China;Research Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi'an 710075,Shaanxi,China)

机构地区：[1]中国煤炭地质总局煤航地质勘查院,陕西西安710199 [2]西安科技大学地质与环境学院,陕西西安710054 [3]长安大学地球科学与资源学院,陕西西安710054 [4]陕西延长石油(集团)有限责任公司研究院,陕西西安710075

出　　处：《中国地质》2020年第1期57-71,共15页Geology in China

基　　金：国家自然科学基金(41702144);青海省地质调查局科研项目(2017042007ky007);陕西省自然科学基础研究计划项目(2019JQ-991,2019JM-126);陕西省重点研发计划(2018ZDXM-GY-030)联合资助~~

摘　　要：羌塘盆地是青藏高原上最大的中生代海相沉积盆地,富含烃源岩和蒸发岩,也是中国油气勘探重要的场所之一。巴青地区的上三叠统巴贡组沉积相研究不仅能为特提斯洋的演化提供佐证,而且为羌塘盆地油气和钾盐资源勘探提供理论依据和实践指导。本文对巴青地区上三叠统巴贡组的古生物、沉积构造、岩石组合分析,结果表明:研究区主要发育障壁岛沉积体系下的潟湖相、潮坪相、三角洲相沉积相以及10种亚相。晚三叠世巴贡期,研究区是一个由北(巴青-索县)向南(班-怒缝合带)变深的伸展背景下的陆缘海沉积环境。The Qiangtang Basin is the largest Mesozoic marine sedimentary basin on the Tibetan Plateau.It is rich in source rocks and evaporites,and has become one of the most important places for petroleum exploration in China.The study of sedimentary facies of the Upper Triassic Bagong Formation in Tumen-Baqing area can not only provide evidence for the evolution of the Tethyan Ocean but also provide theoretical basis and practical guidance for the exploration of hydrocarbon and potassium resources in the Qiangtang Basin.An analysis of petrological characteristics,paleontology and sedimentary structures shows that the lagoon facies,tidal flat facies,delta facies and ten kinds of sub-facies are mainly developed in the study area.During the Bagong period of the Late Triassic,the study area was in a continental margin sea sedimentary environment under the extensional background from the north(Baqing-Suoxian)to the south(Ban-Nu suture zone).

关 键 词：油气资源 上三叠统 巴贡组 沉积相 沉积演化 油气地质调查工程 羌塘盆地 西藏 

分 类 号：P618.13[天文地球—矿床学] TE122[天文地球—地质学]