作者：赫英福；赵博；徐博；吕海青；王雷；邹义

第一作者单位：‍中国石油东方地球物理公司研究院库尔勒分院

摘要：塔里木盆地早寒武世发育台地相白云岩,是寒武系盐下主要的勘探目的层。在塔里木盆地盆地级地震剖面拼接、处理和解释的基础上,结合钻/测井、露头等资料的研究成果,运用层序地层学、地震地层学的方法和原理,对塔里木盆地下寒武统地层进行了详细的层序地层学研究,建立了寒武系下寒武统层序地层格架,将下寒武统划分为1个完整的二级层序和3个完整的三级层序。三级层序形成主要受控于古构造背景、碳酸盐沉积速率与可容纳空间的变化以及古气候条件。塔里木盆地寒武系肖尔布拉克组为碳酸盐岩混积潮坪-古陆-混积潮坪-半蒸发云岩坪藻云坪-台缘-缓坡-盆地沉积模式,有利储层主要发育在北部和东部台缘、中部缓坡以及和田古陆北侧。下寒武统内部存在的2套有利储盖组合,即肖尔布拉克组下段/肖尔布拉克组中段与肖尔布拉克组上段/吾松格尔组,是塔里木盆地盐下比较现实的勘探领域。

Abstract：The platform facies dolostone which occurs in Early Cambrian strata of the Tarim basin is the main target of cambrian subsalt exploration. On the base of the joint processing shaft seismic section and combining with the results of logging and outcrop. The lower Cambrian strata under the Tarim basin is analysed by using of the methods and principles of sequence and seismic stratigraphy, The sequence stratigraphic framework is established. The lower Cambrain stratum is divided into one second-order sequence and two third-order sequence. The third-order sequence is mainly controlled by the ancient tectonic setting, changes of the carbonate deposition rate and accommodation space, and ancient climate condition. The sedimentary model of Cambrian Xiaoerbulake formation in the Tarim basin is the gentle slope-ancient land-restricted platform-open platformplatform margin-gentle slope-deep water continental basin. The favorable reservoir is developed in the platform margin of eastern and northern Tarim basin, the gentle slope of the middle Tarim basin and the southern Hetianancient land. Two favorable reservoir-seal assemblages have been identified, including:Xiaoerbulake lowermiddle formation;Xiaoerbulake upper-wusonggeer formation. It is a mostrealistic exploration field of cambrian subsalt in the Tarim basin.

基金：国家科技重大专项项目(2016X05053)；

关键词：塔里木盆地;下寒武统;层序地层特征;

DOI：10.16186/j.cnki.1673-9787.2017.06.009

分类号：P534.41;P539.2