• 责任者：Zhang Daojun (Zhanjiang Branch ; CNOOC ; Zhanjiang 524057 ; China) ; Wang Yahui
• 刊名：Acta Sedimentologica Sinica
• 出版年：2013
• 卷期：31(6)
• 关键词：沉积微相 ; sedimentary microfacies ; 油气勘探 ; petroleum exploration ; 琼东南盆地 ; Qiongdongnan Basin
• 页码：p.1114-1121
• 图表：8 illus., 17 refs.
• 分类号：0803
• issnNo：ISSN1000-0550
• isbnNo：CN62-1038/P

     Central canyon is located in Qiongdongnan Basin deep water area of the northern South China Sea, and is key areas in oil and gas exploration. So far, canyon about the microfacies, causes and sandbody distribution rule are still in dispute. Therefore, based on the new drilled well, high-resolution 3-D data, we carried out a series of work, such as technical analysis for the rock and mineral characteristics, particle size analysis, sedimentary structures, pale ontological features, well logging facies, and using the RMS amplitude attribute, a variety of slicing technology, etc. The results show that the canyon is the deeper downcutting and scours to the older strata eastwards within the Huang Liu group （T40 - T30）. The three genetic facies are included in the Central canyon channel system： muddy chan nel, point bar, and levee complex. Integration of tectonic setting, ancient landforms and planar deposition facies su perimposed map indicates that point bar developed in the bend of the canyon pale-topography and interpreted to be as sociated to continuous lateral migration during channel evolution, resulting in the deposition of lateral accretion packa ges in the inner side of the channel and erosion at the outer side of the channel. Characteristics of lithology and log in the well drilling through the Central canyon contain sets of sand bodies, named point bar in this paper, and thin mud stones. Point bar can form sizable reservoir elements as much as 8 ～ 20.5 km： in the central canyon.