西湖凹陷层序划分及海平面变化响应

详细信息

收稿日期: 2013-02-19

STRATIGRAPHIC SEQUENCES IN XIHU SAG AND THEIR REPONSE TO SEA LEVEL CHANGES

Received Date: 19 February 2013

摘要: 层序识别与划分是东海西湖凹陷油气勘探研究工作的重要基础。利用层序地层学、古生物学、地层学等技术手段,对西湖凹陷古近系和新近系地层进行识别,共识别出14个层序界面、15个三级层序,并找出各层序在海平面升降变化上的响应。从层序划分结果来看,始新统至上新统发育的各地层界面在地震上都显示出不整合或对应于不整合的整合界面,而这些层序界面均与海平面变化曲线中的关键界面相吻合,也与古生物特征吻合。
- 西湖凹陷 /
- 层序划分 /
- 海平面变化
Abstract: With the help of sedimentology, paleontology, and stratigraphy, 14 sequence boundaries were recognized and 15 third-order sequences divided in the Xihu Sag, and each sequence is a response to the sea level change. Sequences from the Eocene to Pliocene were divided with the boundaries of unconformity or conformity equivalent to unconformity, which matches well the key boundaries in the curve of sea level change and is supported by palaeontological records.
- Xihu Sag /
- sequence division /
- sea level change