石油与天然气地质 ›› 2004, Vol. 25 ›› Issue (5): 528-532.doi: 10.11743/ogg20040510

• 油气地质 • 上一篇    下一篇

东营凹陷中带沙河街组三段浊积体储层特征类型与成因

王居峰1,2, 郑和荣3, 苏法卿2   

  1. 1. 中国地质大学,北京 100083;
    2. 中国石化胜利油田地质科学研究院,山东东营 257015;
    3. 中国石化石油勘探开发研究院,北京 100083
  • 收稿日期:2004-08-24 出版日期:2004-10-25 发布日期:2012-01-16
  • 基金项目:

    国家"十五"科技攻关项目(2001BA605A09);中国石油化工集团公司勘探先导计划"中国东部高精度层序地层及岩性油藏勘探研究"项目

Reservoir characteristics and genesis of turbidite fans in the 3rd member of Shahejie Formation in central Dongying depression

Wang Jufeng1,2, Zheng Herong3, Su Faqing2   

  1. 1. China University of Geosciences, Beijing;
    2. Geological Science Research Institute of Shengli Oilfield Company Ltd., SINOPEC, Dongying, Shandong;
    3. Exploration and Development Research Institute, SINOPEC, Beijing
  • Received:2004-08-24 Online:2004-10-25 Published:2012-01-16

摘要:

东营凹陷中带沙河街组三段的浊积扇体主要分布于洼陷的深凹部,可按成因分为滑塌浊积扇、坡移浊积扇和湖底扇3种类型,其形成与基准面的升降变化密切相关:滑塌浊积扇形成于短期基准面下降期,由三角洲进积过程中前缘沉积物滑塌而成;坡移浊积扇形成于短期基准面上升期,是湖水动力及洪水作用等对三角洲前缘及三角洲平原沉积物进行侵蚀冲刷,使沉积物沿湖盆边缘斜坡移动至深水湖区再沉积而形成;湖底扇形成于中期基准面上升期,在层序中所处的位置与经典层序地层学低位体系域中的低位扇相当。3类扇体中坡移浊积扇和湖底扇厚度大、储集物性好,含油气性好,是区内主要的储油砂体,而滑塌浊积扇规模相对较小,储集物性较差。

关键词: 基准面旋回, 浊积扇, 储层成因, 沙河街组三段, 东营凹陷

Abstract:

Turbidite fans in the 3rd member of Shahejie Formation in central Dongying depression,mainly distributed in the deepest sag of the depression,can be divided genetically into three types:slump turbidite fan,slope-sliding turbidite fan and sublacustrine fan.Their formation was closely related to the fluctuation of base level.Slump turbidite fans were formed during the short-term falling of base level,as a result of redeposition of the slumped frontal sediments of the prograding delta.Slope-sliding turbidite fans were formed during the short-term rising of base level,as a result of redeposition of sediments sliding from marginal slope of the lake basin to deep lake area,due to erosion and washing of delta front and plain by dynamic force of lake-and flood-water.Sublacustrine fans were formed during the medium-term rising of base level and located in the sequence stratigraphy corresponding to the lowstand fans in the lowstand system tract in classical sequence stratigraphy.Of these three types of turbidite fans,the sublacustrine fans and slope-sliding fans,with large thickness,good poroperm characteristics and petroliferous properties,are the main reservoirs in this area,while slump turbidite fans are characterized by smaller sizes and relatively poor poroperm characteristics.

Key words: base level cycle, turbidite fans, genesis of reservoir, the 3rd member of Shahejie Formation, Dongying depression

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