摘要
淹没不整合型层序以其凝缩层直接覆盖于层序界面上,即凝缩层+高水位体系域层序类型为特征,以不含有任何暴露证据而区别于层序地层学定义的Ⅰ型和Ⅱ型层序界面,成为碳酸盐地层层序中的一种特殊类型的三级旋回层序界面。以淹没不整合型层序的特征描述、鉴别方法和实例分析阐述了淹没不整合是一种旋回层序的特殊类型即加深淹没型层序界面。这种淹没不整合型层序在油气运移方面起着重要作用。
Drowned unconformity sequence is marked by a sequence interface on which a condensed section （CS） directly covers, which means a ＂CS＋HST＂ type. It is distinguished with Type- I and Type- II sequence interfaces defined by sequence stratigraphy due to no evidence of exposure so that it becomes a special third-order carbonate cyclic sequence interface. Through the description of features, the introduction of identification methods and the analysis of examples, it is explained that the drowned unconformity sequence is a special type of stratigraphic cyclic sequence, that is the ＂deepened submerge sequence interface＂, which plays an important action in hydrocarbon migration,
出处
《海相油气地质》
2007年第3期15-20,共6页
Marine Origin Petroleum Geology
关键词
淹没不整合
凝缩层序
层序界面
碳酸盐岩
层序地层学
油气运移
Drowned unconformity sequence
Sequence interface
Sequence stratigraphy
Condensed section
Hydrocarbon migration
