【摘要】 利用地震、测井、岩相等资料,对饶阳凹陷马西地区古近系进行了层序地层学研究,将其划分为3个二级层序和10个三级层序。层序Ⅷ、Ⅸ、Ⅹ为河流层序,可划分为基准面上升体系域和基准面下降体系域;层序Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ和Ⅶ为湖泊层序,每个层序可划分为低位体系域、湖侵体系域和高位体系域。在层序地层研究的基础上,认为马西地区同沉积构造坡折带的存在控制了砂体的展布、烃源岩的发育以及油气的运聚,因而对该地区隐蔽油气藏的形成起控制作用。建立了隐蔽油气藏在不同体系域中的发育模式,并提出了下一步勘探的有利方向。更多还原

【Abstract】 The Palaeogene sequence stratigraphy in the Maxi region,Raoyang depression may be classified,on the basis of seismic data,well logs and sedimentary facies,into 3 second-order sequences and 10 third-order sequences.The third-order sequences VIII,IX and X are assigned to the fluvial sequences including the base-level rising systems tract and base-level falling systems tract.The third-order sequences Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ,Ⅵ and Ⅶ represent the lacustrine sequences,each of which consists of lowstand systems tract,transgressive systems tract and highstand systems tract.The syndepositional structural breaks in the Maxi region have exercised a major control on the distribution of sandstones,development of source rocks,migration of hydrocarbons,and accumulation of subtle hydrocarbons in this region.The model for the accumulation of subtle hydrocarbons shows that Sequences Ⅲ,Ⅳand V below the structural breaks may be regarded as the targets for the further exploration of hydrocarbons.更多还原