Sedimentary Laws of Thin-Layer, Fine-Grain Turbidites of Distant-Gentle Slope: A Case from the 1st Member of Qingshankou Formation in Dabusu Area of West Slope, South Songliao Basin
详细信息
- 责任者：Zhao Ning (Africa Department ; Research Institute of Petroleum Exploration and Development ; Beijing 100083 ; China) ; Huang Jiangqin
- 刊名：Acta Sedimentologica Sinica
- 出版年：2013
- 卷期：31(2)
- 关键词：浊积岩 ; turbidite ; 砂体 ; sand bodies ; 松辽平原 ; Songliao Plain
- 页码：p.291-301
- 图表：illus., 47 refs.
- 分类号：1003
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
Based on the study of high-resolution sequence stratigrapghy and sedimentology,isochronic stratigraphy framework of high accuracy in fifth-level has been established,and tested by the analysis of maximum entropy spectrum,a case study of the 1st member of Qingshankou formation in Dabusu area of west slope,south Songliao Plain.The sedimentary law of thin-layer,fine-grain turbidites certificated that : 1) slumps were mostly located in the falling period of base-level cycles,near the sequence boundary,thick thickness,superimposed or interlayed with turbidite channels vertically,and thickening upwards; 2) turbidite channels were usually near the sequence boundary,thick thickness,and conducted as mainbodies of boxing logs in the rising period; and 3) turbidite sand sheets were mainly distributed in deeper and near maximum flooding surfaces,thin thickness,superimposed or interlayed with lacustrine muds,turbidite channel flanks or slumps vertically.Exloration practices indicated that high-oil reserves can be found in thin-layer,fine-grain turbidites of this area.
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