塔里木盆地奥陶系台地边缘生物礁、滩发育特征  

Development characteristics of organic reef-bank complex on Ordovician carbonate platform margin in Tarim Basin

作　　者：顾家裕[1] 张兴阳[1] 罗平[1] 罗忠[1] 方辉[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《石油与天然气地质》2005年第3期277-283,共7页Oil & Gas Geology

基　　金：国家"973"重点基础研究发展规划项目(G1999043311)

摘　　要：塔里木盆地中晚奥陶世碳酸盐台地边缘可划分为低能、相对低能、相对高能、高能4种类型。不同的台地边缘发育不同的生物礁、滩组合:1)低能台地边缘型,以塔中Ⅰ号断裂带上奥陶统良里塔格组沉积早期台缘灰泥丘、含泥滩相组合为代表;2)相对低能台地边缘型,以巴楚露头区中奥陶统一间房组(大湾沟组)沉积期障积礁、含灰泥滩组合为代表;3)相对高能台地边缘型,以轮南中奥陶统一间房组沉积期障积礁、滩相组合为代表;4)高能台地边缘型,以塔中Ⅰ号断裂带上奥陶统良里塔格组沉积晚期骨架礁、滩相组合为代表。高能台地边缘骨架礁、滩组合是最有利的勘探目标。海平面上升、构造升降和碳酸盐产率是控制台地边缘迁侈和台地边缘类型的主要因素,并进一步控制了台地边缘生物礁、滩的发育。The Middle-Late Ordovician carbonate platform margin in Tarim basin can be divided into 4 types, including low energy,relatively low energy,relatively high energy,and high energy types.Different organic reef-bank complexes have been developed in different platform margin types.1)The low energy type carbonate platform margin can be represented by lime mud mound-muddy bank complex in Tazhong I faulted zone which have been developed during the early-stage deposition of the Upper Ordovician Lianglitage Formation.2)The relatively low energy type carbonate platform margin can be represented by the barrier reef-lime mud bank complex in Bachu outcrop area which have been developed during the deposition of Middle Ordovician Yijian- fang Formation(Dawangou Formation).3)The relatively high energy type carbonate platform margin can be represented by the barrier reef-bank complex in Lunnan area which have been developed during the deposition of Middle Ordovician Yijianfang Formation.4)The high energy type carbonate platform margin can be represen- ted by the framework reef-bank complex in Tazhong I faulted zone which have been developed during the late- stage deposition of the Upper Ordovician Lianglitage Formation.The framework reef-bank complexes in the high energy carbonate platform margin are the most favorable exploration targets.Sea level ascending,tectonic uplifting and descending and carbonate yield are the main factors that control the migration of carbonate platform margins and their types,and they further control the development of organic reefs and banks on carbonate plat- form margins.

关 键 词：碳酸盐台地边缘 生物礁、滩复合体 碳酸盐岩储层 奥陶系 塔里木盆地 

分 类 号：TE112.2[石油与天然气工程—油气勘探]