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古地理学报 ›› 2009, Vol. 11 ›› Issue (3): 275-183. doi: 10.7605/gdlxb.2009.03.003

• 岩相古地理学及沉积学 • 上一篇    下一篇

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

李凤杰王多云刘自亮王峰   

  1. 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
  • 出版日期:2009-06-01 发布日期:2009-06-01
  • 通讯作者: 李凤杰，男，1972年生，现为成都理工大学沉积地质研究院副教授，主要从事沉积学和层序地层学研究。电话：028-84078999。
  • 作者简介:李凤杰，男，1972年生，现为成都理工大学沉积地质研究院副教授，主要从事沉积学和层序地层学研究。电话：028-84078999。
  • 基金资助:

    中国科学院资环局知识创新工程重要方向项目（编号：KZCX3-SW-128-04）资助

Fluvial deposition and evolution of Yan 9 oilbearing interval of the Middle Jurassic Yanan Formation in Huachi area， Ordos Basin

  1. 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
  • Online:2009-06-01 Published:2009-06-01
  • Contact: Li Fengjie， born in 1972， is an associate professor of Institute of Sedimentary Geology， Chengdu University of Technology. He is mainly engaged in sedimentology and sequence stratigraphy.
  • About author:Li Fengjie， born in 1972， is an associate professor of Institute of Sedimentary Geology， Chengdu University of Technology. He is mainly engaged in sedimentology and sequence stratigraphy.

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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（Y9）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。Y39油层是辫状河发育的油层，Y29油层在继承Y39油层河流的基础上发育辫状型曲流河，Y19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。

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

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 Yanan 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 Y39 interval and Y29 interval inherited the fuvial deposits of Y39， and formed the braided meandering fluvial facies. After the two former stages of filling process， anastomosed fluvial deposits were developed in the Y19 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.

Key words: braided fluvial, braided meandering fluvial, anastomosed fluvial, sedimentary facies, fluvial evolution, Yan 9 oilbearing interval, Ordos Basin