张强;刘丽芳;张晓庆;刘一鸣;陈少平;

• 1:中国石油大学(华东)地球科学与技术学院

• 2:中海石油(中国)有限公司北京研究中心

摘要(Abstract)：

利用埕北凹陷钻井、录井、测井、地震资料等,分析研究区古近系构造结构特征,恢复古近纪构造演化,划分沉积相类型,研究沉积体系的时空展布规律,明确古近系构造对沉积的控制作用。结果表明:埕北凹陷古近系发育的NW向断裂控制研究区凸凹格局,NE、NEE向断裂改造NW向构造格局。埕北凹陷古近纪构造演化分为三个阶段,继承断陷期(Ek-Es4)表现为"窄盆、浅水"环境,主要发育扇三角洲沉积;断陷扩张期(Es3)表现为"深盆、深水"环境,以发育半深湖—深湖沉积为主;断—坳转换(Es2-Ed)早期表现为"广盆、深水"环境,以发育半深湖—深湖沉积为主,晚期表现为"广盆、浅水"环境,主要发育辫状河三角洲与曲流河三角洲沉积。研究区古近系发育陡坡断裂坡折带、缓坡断裂坡折带及洼陷边缘型坡折带三种类型,其中陡坡断裂坡折带主要发育扇三角洲沉积,缓坡断裂坡折带主要发育辫状河三角洲与曲流河三角洲沉积,洼陷边缘型坡折带主要发育巨厚的湖相沉积及少量湖底扇沉积。该结果为研究区古近系油气勘探提供指导。

关键词(KeyWords)：构造演化;构造坡折带;沉积体系;古近系;埕北凹陷

Abstract:

Keywords:

基金项目(Foundation):国家科技重大专项(2016ZX05024-002-001);; 中央高校基本科研业务费专项资金项目(16CX06043A)

作者(Author):张强;刘丽芳;张晓庆;刘一鸣;陈少平;

Email:

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