肖竣文;辛仁臣;

• 1:中国地质大学(北京)地球科学与资源学院

• 2:中国地质大学(北京)海洋学院

摘要(Abstract)：

以松辽盆地北部西斜坡青山口组二段至姚家组一段高频层序地层为研究对象,研究各体系域内沉积体系充填类型和展布规律,利用地震、测井、岩心和古生物资料,建立松辽盆地西斜坡中青二段至姚一段四级层序格架;分析四级层序格架内沉积微相类型、沉积体形态及规模,确定沉积微相时空分布和演化特征。结果表明:青山口组二段划分为2个四级层序(Cg4、Cg3),青山口组三段划分为3个四级层序(Cg2、Cg1、Cg0),姚家组一段划分为1个四级层序(Cp1),各四级层序内均能识别出相应级次的湖泊扩张体系域和湖泊收缩体系域。研究区主要发育三角洲前缘河口坝、远砂坝、滨浅湖混合滩、砂滩和钙质浅滩沉积微相,富砂的三角洲前缘、滨浅湖砂质滩坝微相与富泥的滨浅湖混合滩微相在剖面上形成储盖组合;平面上,来源于四个物源方向的三角洲沉积体在青山口组二段的各体系域沉积时期逐渐向湖推进,与滨浅湖混合滩、泥滩微相共存,并新发育西北物源三角洲;青山口组三段沉积阶段三角洲沉积体规模明显缩小,以发育滨浅湖钙质浅滩微相为特征,Cp1时期三角洲再次向湖迁移,滨浅湖不断萎缩。该研究结果为研究区地层—岩性油气藏预测、评价提供依据。

关键词(KeyWords)：松辽盆地;西部斜坡;青山口组二段;姚家组一段;高频层序;沉积微相

Abstract:

Keywords:

基金项目(Foundation):国家科技重大专项(2011ZX05001-002)

作者(Author):肖竣文;辛仁臣;

Email:

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