塔里木盆地巴楚地区一间房组礁滩体沉积特征  

Reef-Flat Complex Sedimentary Characteristics of Middle Ordovician Yijianfang Formation in Bachu Area,Tarim Basin

作　　者：徐康[1] 刘思彤[1] 于炳松[1] 

机构地区：[1]中国地质大学地质过程与矿产资源国家重点实验室,北京100083

出　　处：《新疆石油地质》2012年第5期536-539,共4页Xinjiang Petroleum Geology

基　　金：国家973项目(2011CB201100-03;2006CB202302);国家科技重大专项(2011ZX05005-004-HZ06;2011ZX05009-002)

摘　　要：分析了塔里木盆地奥陶系礁滩体沉积时的古地理背景、礁滩体的岩石学、层序及沉积相、古生物及地球化学等特征,对塔里木盆地巴楚地区的礁滩体产出层位、主要造礁生物及沉积相带变化进行了探讨。发现礁滩复合体主要出露于中奥陶统一间房组二段台地边缘相;造礁生物以托盘类为主,其次为海绵类。在一间房组沉积期碳同位素值和氧同位素值出现小幅波动,呈小幅海进到海退序列,整体变化不大,这一阶段海平面变化范围保持相对稳定。The Ordovician reef-flat complex is one of major oil-gas bodies in carbonate reservoirs in Tarim basin. The occurrence, reef building organisms and sedimentary facies changes of the complex were probed by analyzing characteristics of the ancient geographical setting, petrology, sequence, sedimentary facies, paleontology and geochemistry It is found that the complex is mainly developed in platform marginal facies of member-2 of Yijianfang formation of the middle Ordovician; the reef building organisms are dominated by the tray sort, followed by the sponge. δ13C and δ18O values fluctuations mean this sedimentary stage of Yijianfang formation belongs to sequence from ingression to regression with the relatively stable sea-level changes.

关 键 词：塔里木盆地 巴楚地区 中奥陶统 一间房组 礁滩体 沉积特征 

分 类 号：TE112.221[石油与天然气工程—油气勘探]