准噶尔盆地东南缘二叠系芦草沟组沉积环境分析  

Analysis of Sedimentary Environment of the Permian Lucaogou Formation in Southeastern Margin of the Junggar Basin

作　　者：彭雪峰[1] 汪立今[1] 姜丽萍[1] 

机构地区：[1]新疆大学地质与勘查工程学院,新疆乌鲁木齐830047

出　　处：《新疆大学学报（自然科学版）》2011年第4期395-400,共6页Journal of Xinjiang University(Natural Science Edition)

基　　金：国家自然科学基金项目(40862004);新疆维吾尔自治区自然科学基金项目(2011211A018)

摘　　要：根据经典层序地层学和现代沉积学的基本原理,在综合研究钻井、测井、露头、岩芯等资料的基础上,分析了准噶尔盆地东南缘二叠系芦草沟组沉积环境特征与演化,对芦草沟组进行了层序地层分析,在单井研究的基础上进行了层序划分方案,芦草沟组几乎为一个完整的三级层序,由低位体系域、水进体系域、高位体系域和水退体系域组成,分别对应地层的四个岩性段;根据连井剖面,建立了芦草沟组层序地层格架,结合盆地地质条件,进行了各体系域沉积平面相分析.该区油页岩体系域类型主要为湖相沉积,湖相分为滨湖、浅湖和半深湖-深湖三种亚相,再细分为砂质滩坝、泥质滩坝、碳酸盐滩坝、生物礁四种微相.Using theories of classic sequence stratigraphy and modern sedimentology,the authors analyzed the data of drill holes,loggings,core with the purpose of investigating sedimentary environment characteristics and evolution of the Permian Lucaogou formation in the southeastern margin of the Junggar Basin.Based on sequence stratigraphic analysis of the single well,Lucaogou Formation is almost a complete third-order sequence,which is divided into lowstand systems tract,transgressive system tract,highstand systems tract and regressive systems tract,corresponding respectively to four lithologic sections of the stratum;According to the well-connecting profile,the authors established sequence stratigraphic framework,then combining with geological conditions of the basin,made a plane analysis of the sedimentary facies of each system tract.Lake facies is main type of systems tract in the area,which is divided into three subfacies-lakeside,shallow lake and semi-deep-deep lake,and then subdivided into four microfacies-sandy beach bar,muddy beach bar,carbonate beach bar and reef.

关 键 词：准噶尔盆地东南缘 二叠系 沉积环境 

分 类 号：P588.2[天文地球—岩石学]