Hierarchical Division and Origin of Single Sand Bodies in Fuyu oil layer, Fuyu Oilfield

详细信息   

• 责任者：Zhang Qingguo （College of Resources and Information ; China University of Petroleum ; Beijing 102249 ; China） ; Bao Zhidong
• 刊名：Petroleum Exploration and Development
• 出版年：2008
• 卷期：35(2)
• 关键词：砂岩储集层 ; sandstone reservoirs ; 砂体 ; sand bodies ; 松辽平原 ; Songliao Plain
• 页码：p.157-163
• 图表：6 illus., 2 tables, 25 refs.
• 分类号：1003
• issnNo：ISSN1000-0747
• isbnNo：CN11-2360/TE

摘要

During the middle and late periods of water-flood, three-dimensional distribution and connection of single sand bodies in reservoirs are important research issues. Based on core analysis and dense well logging, in combination with sequence stratigraphic and hierarchic analysis of reservoirs, the Fuyu oil layer was divided into 4 sand members and 13 sub-zones. Two sedimentary sub-facies, 9 sedimentary micro-facies and 7 single-genesis sand bodies were identified. Four-type overlay models of combination channels were put forward by using sub-zone contrast technique and characteristic changing of well-logging responses. The single-genesis sand body boundary was identified. The average width and thickness of individual sand body is 150 to 500 meters and 3 to 7 meters, respectively. The average ratio of width to thickness is 40∶1 to 120∶1.Wider and thicker composite channels were developed by the cutting and folding of the sand bodies in delta-plain branch channels and delta-front sub-aqueous branch channels, and thus formed the best reservoirs of remaining oil.