| 鄂尔多斯盆地华池地区中侏罗统延安组延9油层组河流沉积及演化 |
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| 引用本文： | 李凤杰,王多云,刘自亮,王峰.鄂尔多斯盆地华池地区中侏罗统延安组延9油层组河流沉积及演化[J].古地理学报,2009,11(3):275-183. |
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| 作者姓名： | 李凤杰 王多云 刘自亮 王峰 |
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| 作者单位： | 1.成都理工大学沉积地质研究院，四川成都610059;2.北京师范大学资源学院，北京100875;3.中国地质大学（北京）沉积盆地研究所， 北京100083 |
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| 基金项目： | 中国科学院资环局知识创新工程重要方向项目 |
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| 摘 要： | 据新的地层划分方案及大量钻井、露头和岩心资料，详细研究了鄂尔多斯盆地华池地区延安组延9油层组（Y9）沉积体系特征及演化，认为延9油层组主要为河流沉积，是延10油层组的继承与发展，发育有辫状河、辫状型曲流河和网状河3种类型的河流。Y39油层是辫状河发育的油层，Y29油层在继承Y39油层河流的基础上发育辫状型曲流河，Y19油层则是在前两期逐渐填平补齐之后，在准平原条件下发育的网状河沉积。华池地区延9油层组发育辫状河-辫状型曲流河和网状河两种河流沉积模式。
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| 关 键 词： | 辫状河 辫状型曲流河 网状河 沉积相 河流演化 延9油层组 鄂尔多斯盆地 |
Fluvial deposition and evolution of Yan 9 oil-bearing interval of the Middle Jurassic Yan'an Formation in Huachi area, Ordos Basin |
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| Li Fengjie,Wang Duoyun,Liu Ziliang,Wang Feng.Fluvial deposition and evolution of Yan 9 oil-bearing interval of the Middle Jurassic Yan'an Formation in Huachi area, Ordos Basin[J].Journal of Palaeogeography,2009,11(3):275-183. |
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| Authors: | Li Fengjie Wang Duoyun Liu Ziliang Wang Feng |
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| Institution: | 1.Institute of Sedimentary Geology，Chengdu University of Technology， Chengdu 610059，Sichuan ;2.College of Resources Science & Technology， Beijing Normal University， Beijing 100875;3.Institute of Sedimentary Basin， China University of Geosciences（Beijing）， Beijing 100083 |
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| Abstract: | Based on a new stratigraphic division and large quantities of drilling，outcrop and core data，the authors have studied in detail the depositional system， lithofacies palaeogeographic characteristics and evolution of the Yan 9 oil bearing interval of the Yanan Formation in Huachi area， Ordos Basin. The results indicate that the Yan 9 oil bearing interval is dominated by fluvial deposits and was inherited and developed from the Yan 10 oil bearing interval. During the deposition of Yan 9， mainly braided fluvial， braided meandering fluvial and anastomosed fluvial facies were developed. Braided fluvial facies was developed in the Y39 interval and Y29 interval inherited the fuvial deposits of Y39， and formed the braided meandering fluvial facies. After the two former stages of filling process， anastomosed fluvial deposits were developed in the Y19 interval in the peneplain environment. Two fluvial depositional models were developed in the Yan 9 oil bearing interval in Huachi area，namely as， braided fluvial braided meandering fluvial and anastomosed fluvial depositional models. |
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| Keywords: | braided fluvial braided meandering fluvial anastomosed fluvial sedimentary facies fluvial evolution Yan 9 oil bearing interval Ordos Basin |
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