Sedimentary Facies Analysis of the Lower Bitumen-Bearing Sandstone Member of Kepingtage Formation, Silurian in Tazhong Area, Tarim Basin

详细信息   

• 责任者：Ding Meng (School of Energy Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Fan Tailiang
• 刊名：Geoscience
• 出版年：2012
• 卷期：26(2)
• 关键词：沥青 ; asphalt ; 沉积相 ; sedimentary facies ; 塔里木盆地 ; Tarim Basin
• 页码：p.342-348
• 图表：9 illus., 15 refs.
• 分类号：1003
• 出版序号：20130289
• issnNo：ISSN1000-8527
• isbnNo：CN11-2035/P

摘要

 
    

The lower bitumen-bearing sandstone member of Kepingtage Formation in Tazhong area is one of the major oil and gas-rich layers in Palaeozoic clastic rock series in Tarim Basin. Based on description of drilling cores, combined with logging, seismic and test data, it is showed that transgressive shore-tidal-braided-river delta depositional system was developed in target stratum. Littoral facies is made up of up-nearshore and down-nearshore microfacies, whose lithology includes fine sandstone, siltstone, pebbled anisomerous sandstone. Tidal flat facies is made up of tidal sand bar, tidal channel, sand flat microfacies. According to sedimentary overlap evolution law, the microfacies of these four periods of sandbodies are littoral, tidal flat and braided-river delta facies in the plane. In terms of controlling factors, distribution range and transgression direction, the four periods microfacies have similarity and regularity.