轮南周缘地区奥陶系碳酸盐岩沉积相发育规律  

THE LAW OF SEDIMENTARY FACIES DEVELOPMENT OF ORDOVICIAN CARBONATE ROCKS IN THE LUNNAN'S PERIPHERY,TARIM BASIN

作　　者：马青[1] 赵学钦[1] 陈沛[1] 薛小红[1] 杨海军[2] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]塔里木油田分公司研究院,新疆库尔勒841000

出　　处：《西南石油大学学报（自然科学版）》2007年第4期26-29,共4页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：中石油中青年创新基金(06E1018);四川省重点学科建设项目(SZD0414)

摘　　要：塔里木盆地轮南周缘地区奥陶系发育良好,主要由海相碳酸盐岩和陆源碎屑岩组成。沉积相分析表明,中下奥陶统鹰山组为区域性的开阔台地相台内滩夹滩间海沉积,中奥陶统一间房组为区域性的海水变浅的开阔台地浅滩夹点礁沉积,上奥陶统吐木休克组发育沉没台地-斜坡相,上奥陶统良里塔格组是在晚奥陶世海侵背景下碳酸盐岩台地边缘-斜坡相的沉积产物。研究区奥陶系发育两期礁滩体,第一期礁滩体发育于中奥陶统一间房组,第二期礁滩体发育于上奥陶统良里塔格组上部,两期礁滩体的发育环境和分布范围各具特色。奥陶系碳酸盐岩沉积相带总体上呈近南北向展布,各相带在近东西方向上错落有序分布,并且随时间发生明显的侧向迁移。The Ordovician strata are well developed in the Lunnan's periphery of Tarim Basin,and are mainly composed of marine carbonate rocks and terrigenous clastic rocks.The analysis of sedimentary facies indicates that Yingshan Formation,Lower-Middle Ordovician,is the deposits of bank and interbank sea sub-facies in a territorial open platform facies.The shoal and patch reef sub-facies in territorial seawater shallowing open platform facies were developed in Yijianfang Formation Middle Ordovician.The submerged platform-slope facies were developed in Tumuxiuke Formation,Upper Ordovician.Lianglitage Formation,Upper Ordovician,is the deposits of carbonate platform edge-slope facies under the background of the Late Ordovician transgression.Two stage reef and shoal bodies are developed in the region,the first grew in the Yijianfang Formation,Middle Ordovician,the second at the top of Lianglitage Formation,Upper Ordovician.These reef and shoal bodies have distinct sedimentary environment and distributions.The Ordovician carbonate sedimentary facies are wholly distributed in the form of close north-south each other.Every facies on the close east-west direction has order to scatter,and obviously lateral migrate with time.

关 键 词：碳酸盐岩 沉积相 礁滩体 发育规律 奥陶系 塔里木盆地 

分 类 号：TE121.3[石油与天然气工程—油气勘探]