塔北隆起侏罗系阳霞组沉积特征  

THE JURASSIC FLUVIAL FACIES IN THE NORTH TARIM UPLIFT,XINJIANG

作　　者：张丽娟[1] 钟大康[2] 李越[3] 程明[1] 魏燕萍[1] 

机构地区：[1]塔里木油田分公司勘探开发研究院,新疆库尔勒841000 [2]中国石油大学,北京102200 [3]中国科学院南京地质古生物研究所,江苏南京210008

出　　处：《地层学杂志》2009年第3期241-248,共8页Journal of Stratigraphy

基　　金：国家自然科学基金项目(No.40572069);IGCP506项目支持

摘　　要：塔北隆起侏罗系阳霞组下粗上细的沉积特征显示其为典型的河流相沉积,东部普惠1井序列发育最全,向轮南隆起方向具有明显的顶剥底超特征。河流沉积体系中,颗粒普遍偏粗,物源主要来自东河塘以北、英买力以西及跃南地区,英买力西部、东河塘北部以北以及跃南1、2井以南发育近源小型冲积扇,由西向东发育辫状河沉积体系。根据沉积相的空间展布模式,可预测低位域三角洲及湖泊相发育于草湖及其以东地区;阳霞组砂体分别向北部的轮台凸起、南部的中央隆起尖灭,是寻找岩性地层圈闭的有利地区。In the North Tarim area, the Jurassic Yangxia Formation is characterized by a fining-upward fluvial sequence. The Yangxia Formation is most complete in Well PH-1 drilled in the eastern North Tarim area, but it show top truncation and base on lap toward the Lunnan uplift. Sediment provenance mainly came from northern Donghetang, western Yingmaili and Yaonan areas. Therefore, western Yingmaili,northern Donghetang, southern Well YN-1 and YN-2 are represented by small-scale alluvial fans. Braided river sedimentary systems are extended from the west to the east. It is reasonable to predict that lowstand deltas and lacustrine facies would occur downstream in the Caohu area and easternward. Sand-bodies in the Jurassic Yangxia Formation thin out northward to the Luntai uplift, and southward to the Central Uplift. They are favorable lithologic and stratigraphic traps.

关 键 词：辫状河 冲积扇 阳霞组 侏罗系 塔北隆起 新疆 

分 类 号：P534.52[天文地球—古生物学与地层学]