• 责任者：Yin Senlin (College of Geosciences ; China University of Petroleum ; Beijing 102249 ; China) ; Wu Shenghe
• 刊名：Petroleum Exploration and Development
• 出版年：2013
• 卷期：40(6)
• 关键词：砂岩储集层 ; sandstone reservoirs ; 储集空间 ; reservoir space ; 准噶尔盆地 ; Junggar Basin
• 页码：p.757-763
• 图表：7 illus., 3 tables, 21 refs.
• 分类号：1003
• issnNo：ISSN1000-0747
• isbnNo：CN11-2360/TE

     This paper discusses the overall distribution characteristics of alluvial fan in the Triassic Lower Karamay Formation, Yizhong Area, the Karamay Oilfield, with core, outcrop, logging and seismic data. On this basis, the shapes, sizes and stacking pattems of inter-layers in different levels and sub-facies are analyzed using the hierarchy interface method. In the study area, the Lower Karamay Formation contains （from bottom to top） upper fan, mid fan and lower fan deposits, with size-reducing grains, as a complete retrograding sedimentary sequence. The inter-layers in the alluvial fan reservoir can be divided into two types： lithological interlayer （fine sediments） and physical interlayer （argillaceous sandstone/conglomerate）. Origin, pattern and size of inter-layers vary significantly in different subfacies zones. In particular, the inter-layers in upper fan are ＂scattered generally and interlaced locally＂, presenting as partially discontinuous screen in a high-permeable network; the inter-layers in mid fan are relatively stable inter-layers and lateral inter-layers, with a higher capacity to shade or screen the seepage; the inter-layers in lower fan present as a layered cake, with reservoir bodies mosaic-like along the source and lenticular in perpendicularity to the source that are separated by thick interlayer, showing the highest capacity of screen.