塔里木盆地奥陶系蓬莱坝组—鹰山组沉积特征  

Sedimentary Characteristics of Middle to Lower Ordovician Penglaizhen-Yingshan Formations, Tarim Basin

作　　者：赵立欣[1] 傅恒[1] 高雁飞[1] 杨宏飞[1] 王同[1] 

机构地区：[1]油气地质与开发工程国家重点实验室.成都理工大学,四川成都610059

出　　处：《天然气技术与经济》2014年第4期13-16,77,共4页Natural Gas Technology and Economy

基　　金：中国石化西北分公司勘探开发研究院协助项目(KY-S-2008-086)"塔里木盆地下古生界多类型储集体形成与成藏条件研究--塔里木盆地中央隆起带O-Z储集体形成机理;主控因素;有利储集体展布及成藏条件研究"部分成果联合资助

摘　　要：利用塔里木盆地30余口钻井录井、岩心以及薄片资料,结合地震资料分析,在塔里木盆地奥陶系中下统蓬莱坝组—鹰山组识别出局限台地、开阔台地、台地边缘、台缘斜坡、缓坡和盆地6种沉积相,进一步识别出台坪、台内滩、浅水缓坡等沉积亚相类型。在巴麦、塔中、塔北地区,蓬莱坝组—鹰山组上段云岩含量自下而上逐渐降低,由局限台地逐渐过渡为开阔台地;在麦盖提斜坡地区,受海平面上升的影响,形成泥质含量不断增加的缓坡沉积,在满加尔坳陷地区,发育欠补偿盆地。在清楚认识单井相的基础上结合地震相特征绘制蓬莱坝组—鹰山组沉积相平面图,结合区域构造演化背景,建立塔里木盆地蓬莱坝组—鹰山组的沉积模式。The Middle to Lower Ordovician Penglaizhen-Yingshan formations in Tarim Basin were studied according to some data from more than 30 wells, including drilling and mud logging, core and thin-section analysis data, and seismic data. Results show that(1)there are six sedimentary facies distinguished, containing restricted platform, open platform, platform margin, platform margin slope,gentle slope, and basin;(2) there are many identified sedimentary subfacies, including platform, inner platform reef, and shallow ramp;(3) in the upper Penglaizhen-Yingshan formations in Bamai,Tazhong, and Tabei areas, the dolomite content gradually decreases from below, and the sedimentary facies changes from restricted platform to open platform;(4) in Maigaiti slope area, slope deposits with more and more shale content were formed due to sea-level rise, whereas in Manjiaer depression area, underfilled basin was developed. In addition, based on sedimentary-facies mapping and evolutional setting of regional structure, the sedimentary pattern was established.

关 键 词：塔里木盆地 蓬莱坝组-鹰山组 地层特征 平面展布 沉积模式 

分 类 号：P618.13[天文地球—矿床学]