中文摘要：

为分析东濮凹陷文留地区沙三中段（Es3中）的沉积环境及水深变化规律,采用遗迹学与沉积学相结合的方法,对钻井岩芯的观察和遗迹化石进行鉴定,在东濮凹陷文留地区古近纪沙河街组沙三段中部发现遗迹化石11属16种,划分出4种遗迹组合：Palaeophycus-Planolites遗迹组合,解释其形成于淺湖和扇三角洲前緣琢境：Planolite-Mermoides遗迹组合,发育于淺湖较深-半深湖环境;遗迹组合,出现于前扇三角洲亚相;HelminthopsisTrichichnus遗迹组合,产生在油积扇琢境.研冗成果为预测东渡凹陷油气生、储、盖层的空间展布和指导勘探开发具有重要的现实意义.

英文摘要：

In order to analyze sedimentary environment and change law of water deepth in the middle part of third member of the Paleogene Shahejie Formation in Wenliu area, Dongpu Sag, the research method of ich- nology and sedimentology is used, through the observation of drilling cores and identification of trace fossils, 11 ichnogenus and 16 ichnospecies are discovered in the study member. These ichnofossils can be divided into 4 ecological types ： Palaeophycus-Planolites ichnoassemblage, appeared in the Shallow lake and fan delta front environment ; Planolite-Mermoides ichnoassemblage is formed in the Shallow lake and semi deep lake environ-ment ; Helminthopsis-paleodictyon ichnoassemblage occurred in the front fan delta environment ; Helminthopsis- Trichichnus ichnoassemblage generated in the turbidity fan environment. The research results not only provide the evidences on palaeoenvironments and palaeobathymetric analysis but also offer new factor formation to pre-dict oil and gas deposits in Dongpu Sag.