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现代地质 ›› 2005, Vol. 19 ›› Issue (Suppl): 110-114.

• 石油地质 • 上一篇    下一篇

陡坡带扇三角洲形成过程的水槽实验

马晖1,2,鄢继华3,张关龙3,陈世悦3   

  1. 1中国科学院 广州地球化学研究所,广东 广州510640;
    2胜利油田有限公司 现河采油厂,山东 东营257062;
    3石油大学 地球资源与信息学院,山东 东营257061
  • 收稿日期:2004-07-25 修回日期:2004-11-30 出版日期:2005-03-20 发布日期:2013-04-08
  • 作者简介:马晖,男,高级工程师,博士研究生,1966年出生,石油地质学专业,主要从事石油勘探开发及研究工作。
  • 基金资助:

    国家“十五”科技攻关项目(2001BA605A09)。

FLUME-EXPERIMENTAL SIMULATION ON THE FORMATION OF FAN DELTA ON THE STEEP SLOPE

MA Hui1,2,YAN Ji-hua3,ZHANG Guan-long3,CHEN Shi-yue3   

  1. 1Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou,Guangdong510640, China;
    2Xianhe Oil Production Plant, Shengli Oilfield Company Limited, Dongying, Shandong257068, China;
    3 Faculty of Geo-Resources and Information,University of Petroleum, Dongying,Shandong257061, China
  • Received:2004-07-25 Revised:2004-11-30 Online:2005-03-20 Published:2013-04-08

摘要:

通过水槽实验模拟了陡坡带扇三角洲的形成过程及其发育特征。模拟实验表明扇三角洲的形成是一个碎屑沉积体不断前积、加积的过程,扇面沟道的频繁改道和决口沉积是扇三角洲发育的动力机制。由于来自水槽内水体的阻挡,扇体向侧翼生长的速度快于前端,扇体长宽比小于1。水槽内水平面的变化控制了扇三角洲平原扇面的发育特征,水平面的下降有利于扇面沟道的下切和扇体的进积。扇三角洲分为明显的扇三角洲平原、前缘斜坡和前扇三角洲3个亚相,各亚相扇面坡度和沉积动力机制不同,导致扇体表面粒度分布特征明显。

关键词: 扇三角洲, 水槽实验, 沉积模拟, 断陷盆地, 陡坡带

Abstract:

The formation and characteristics of fan delta on the steep slope are simulated by flume experiments. It is found that during the formation the fan delta prograde forward and accrete upward constantly. The frequent diverting and crevasse of channels on the fan surface are the dynamical mechanism in the development of fan delta. Because of the stop from waterbody in flume, the growth rate in lateral sides is quicker than that in the front of fan, the ratio of length and breadth of fan is less than 1. The change of water level in flume controls the characteristics of fan delta plain, and the descending of water level makes for the incision of channels and the progradation of the fan. The fan delta face is divided into three subfacies as plain, front slope and prodelta. These subfacies have different gradients on the fan surface and sedimentary dynamical mechanism, which result in the evident fan-surface gradient and granularity distributing.

Key words: fan delta, flume experiment, sedimentary simulation, fault basin, steep slope

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