西湖凹陷层序划分及海平面变化响应
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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。
With the help of sedimentology,paleontology,and stratigraphy,14sequence boundaries were recognized and 15third-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.
With the help of sedimentology,paleontology,and stratigraphy,14sequence boundaries were recognized and 15third-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.
引文
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[4]王丽静,赵林,曹维福,等.徐家围子西部地区层序划分及控制因素分析[J].石油天然气学报,2009,31(2):193-196.
[5]张建培,徐福,钟韬,等.东海陆架盆地西湖凹陷平湖组-花港组层序地层模式及沉积演化[J].海洋地质与第四纪地质,2012,32(1):35-41.
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[9]王丽顺,陈琳琳.东海西湖凹陷下第三系层序地层分析[J].海洋地质与第四纪地质,1994,14(3):33-42.
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