摘要：2001年，塔里木油田分公司钻探的英南2井在侏罗系获得高产工业气流，是塔东地区油气勘探首次获得重要发现，改变了以往人们对塔东地区的传统地质认识，展示了塔东地区油气勘探的巨大潜力。塔东地区勘探的突破取决于人们对该区石油地质认识的深化，而勘探的突破进一步检验了新的认识。

　　　通过单井相分析，及对沉积展布特征及其演化的研究。对塔东地区寒武—奥陶系层序地层特征分析，将层序地层进行对比分析，研究了上寒武统-下奥陶统层序地层东西部在岩性和厚度上的巨大差异。发现了生、储、盖层纵向上的分布及体系域和层序界面间存在密切关系，尤其是界面类型和级别是控制寒武-奥陶系碳酸盐岩储集层（体）发育的关键因素之一。塔东地区寒武纪—早奥陶世的沉积相演化特征。

关键词：层序地层；沉积相演化；沉积展布特征

Abstract: In 2011 , Yingnan NO.2 oil well which is drilled by the branch company of Tarim oilfield got high yield industrial airflow in Jurassic . It is the first important discovery of oil and gas exploration in the eastern Tarim Basin which changes people's traditional knowledge of the eastern Tarim Basin and shows the huge potential of the area . The breakthrough of the exploration of eastern Tarim Basin depends on the deeper understanding  of the area by people . In addition , the huge breakthrough tests the new knowledge to go a step further . 

　　　Experts analyzed the special oilfield and researched the distribution characteristics and the evolution .Besides , they analyzed the formation characteristics of Cambrian - Ordovician and compared the big difference in rock property and the thickness of sequence stratigraphy of upper Cambrian series with lower Ordovician series. Then , these experts found that there is a closed relation between the distribution and the sequence boundary . Especially,the type and level of Interface is one of the key factors,that controls the development of carbonate rock reservoir ( body ) in Cambrian - Ordovician .Furthermore , they found the evolution features of the de deposition of the Cambrian  period and the Early Ordovician period in the eastern Tarim Basin .

Key words：The Sequence stratigraphy；Evolution of sedimentary facies；Distribution of deposition characteristics