Control of Transfer Zone over Sequences and Depositional System in Fushan Sag, Beibuwan Basin
详细信息
- 责任者：Liu En’tao (Key Laboratory of Tectonics and Petroleum Resources ; China University of Geosciences ; Ministry of Education ; Wuhan 430074 ; China) ; Wang Hua
- 刊名：Journal of China University of Petroleum
- 出版年：2013
- 卷期：37(3)
- 关键词：砂体 ; sand bodies ; 构造地层学 ; tectonostratigraphy ; 北部湾 ; Beibu Gulf
- 页码：p.17-22,29
- 图表：illus., 25 refs.
- 分类号：1003
- issnNo：ISSN1673-5005
- isbnNo：CN37-1441/TE
摘要
Based on the interpretation of the 3D seismic data,the sequence patterns and sedimentary characteristics in the sedimentary period of Liushagang formation were studied taking the transfer zone of the Fushan sag as the research project.The results show that the transfer zone developing above the Huachang in the centre of Fushan sag,plays a crucial role in adjusting the structure differences between the western and eastern areas.There are significant differences on the strike of faults and structure styles between two extensional structure systems,which develops at two lateral sides of the transfer zone respectively.The multi-level step-fault belt type of sequence pattern develops in the western area,while the gentle slope type of sequence pattern in the eastern area.The flexure slope break type of sequence pattern develops in the transfer zone with huge-scale braided channel delta in the high system tract and large-scale turbidite fan in the low system tract.Structural transfer zone,relative lake level changes and paleogeomorphy control the sequence architecture and depositional filling of the Fushan sag together,and this controlling effect varies among different system tracts to some extent.