石油学报 ›› 2008, Vol. 29 ›› Issue (3): 389-394.DOI: 10.7623/syxb200803014

• 地质勘探 • 上一篇    下一篇

鄂尔多斯盆地南部长6和长7油层浊流事件的沉积特征及发育模式

赵俊兴1, 李凤杰1, 申晓莉2, 罗媛1, 付伟2   

  1. 1. 成都理工大学沉积地质研究院 四川 成都 610059;
    2. 中国石油长庆油田公司采油一厂 陕西 延安 716000
  • 收稿日期:2007-11-30 修回日期:2008-01-08 出版日期:2008-05-25 发布日期:2010-05-21
  • 作者简介:赵俊兴,男,1972年5月生,1995年毕业于西安地质学院,现为成都理工大学副教授,博士后,主要从事储层沉积学与含油气盆地分析研究.E-mail;zhaojx@cdut.edu.cn
  • 基金资助:
    国家自然科学青年基金项目(No.40602012)"鄂尔多斯盆地晚三世延长期几个关键性事件沉积及其与油气聚集关系研究"和四川省教育厅自然科学青年基金联合资助.

Sedimentary characteristics and development pattern of turbidity event of Chang 6 and Chang 7 oil reservoirs in the southern Ordos Basin

ZHAO Junxing1, LI Fengjie1, SHEN Xiaoli2, LUO Yuan1, FU Wei2   

  1. 1. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;
    2. No.1 Production Plant, PetroChina Changqing Oilfield Company, Yan'an, 716000, China
  • Received:2007-11-30 Revised:2008-01-08 Online:2008-05-25 Published:2010-05-21

摘要: 在鄂尔多斯盆地西南部及南部长6和长7油层组中的半深湖—深湖亚相中发育了典型的浊积岩,构成了该地区的主要储层类型,并成为该地区油气勘探的重要领域。物源分析表明,西部、南部及西南物源是盆地浊积岩的主导物源。浊积岩的类型包括远源、近源浊积岩和厚层块状、薄层、微层浊积岩。盆地浊积岩具有典型的浊流沉积特征,为低Eh值的还原环境产物。该地区浊积岩为低密度流的湖相浊积岩,为盆地西南部辫状河三角洲前缘垮塌成因。对于大型拗陷型陆相湖盆,一旦条件成熟,就有可能形成浊流沉积。建立了该地区浊积岩形成发育模式。

关键词: 鄂尔多斯盆地, 延长组, 浊积岩, 浊流事件, 浊流沉积, 成因模式

Abstract: The turbidite system was mainly developed in the half-deep lake to deep lake in Chang 6 and Chang 7 oil reservoirs of Yanchang Formation in the southwestern Ordos Basin.The system generated the typical reservoirs in this area and is important domain for oil-gas exploration.The provenance analysis of turbidite indicated that the deposits of turbidite had mainly originated from the west,south and south-west parts of Ordos Basin.According to the sedimentary characteristics,the turbidite could be divided into far-provenance,near-provenance,and thick-layer,thin-layer and micro-bedding turbidites.The turbidite of Yanchang Formation in Ordos Basin has the typical turbidite characteristics of low-density flow in lacustrine facies and origin of reduction environment and the collapse of braided river delta front in the south and west parts of the basin.The developing mode of turbidite in this area was established.

Key words: Ordos Basin, Yanchang Formation, turbidite, turbidity event, turbidite deposition, genetic model

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