| 三角洲前缘滑塌浊积体形成过程模拟 |
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| 引用本文： | 张关龙,陈世悦,鄢继华,姜在兴,宋国奇,邱桂强.三角洲前缘滑塌浊积体形成过程模拟[J].沉积学报,2006,24(1):50-55. |
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| 作者姓名： | 张关龙 陈世悦 鄢继华 姜在兴 宋国奇 邱桂强 |
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| 作者单位： | 中国石油大学地球资源与信息学院 山东东营 257061 |
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| 摘 要： | 三角洲前缘滑塌浊积体是断陷盆地内一类重要的岩性油气藏。通过室内水槽实验模拟了不同条件下三角洲前缘滑塌浊积体的形成过程。实验结果表明，触发机制是三角洲前缘发生滑塌和形成浊积体的前提，它包括地震、波浪等外界触发机制，也包括前缘砂体自身重力所产生的压实沉陷等。其中地震作用可以破坏三角洲前缘的稳定性，形成液化滑塌浊积体和断阶滑塌浊积体。波浪作用可以侵蚀浪基面附近的三角洲前缘砂体，并在回流作用下携带至最大浪基面之下再沉积，沉积过程中形成小型浊积体。无外界触发机制作用下主河道入水口处的砂体在重力作用下向下部泥岩压实沉陷，也可形成滑塌浊积体。浊积体迁移的动力主要是滑塌砂体自身的重力，其中的断阶滑塌浊积体还受到后续叠置体的碰撞力，因此其可以移动更远的距离。
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| 关 键 词： | 三角洲前缘 滑塌浊积体 水槽实验 地震作用 波浪作用 |
| 文章编号： | 1000-0550（2006）01-0050-06 |
| 收稿时间： | 2005-01-11 |
| 修稿时间： | 2005-04-13 |
Simulation of Luxoturbidite in Front of Delta |
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| ZHANG Guan-long,CHEN Shi-yue,YAN Ji-hua,JIANG Zai-xing,SONG Guo-qi,QIU Gui-qiang.Simulation of Luxoturbidite in Front of Delta[J].Acta Sedimentologica Sinica,2006,24(1):50-55. |
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| Authors: | ZHANG Guan-long CHEN Shi-yue YAN Ji-hua JIANG Zai-xing SONG Guo-qi QIU Gui-qiang |
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| Institution: | College of Geo Resources and Information, China University of Petroleum, Dongying, Shandong 257061 |
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| Abstract: | The fluxoturbidite in front of delta is an importantkind of lithologic hydrocarbon reservoirs in fault basins.According to interior flume experiment simulations,the formation of fluxoturbidite in front of delta is studied under differentconditions.The laboratory findings show that triggermechanisms are the preconditionto form turbidite,which include externalmechanisms such as seismicity and wave action and internalmechanism such as compaction and depression of delta-front sands under gravity.Seismicity can damage the stabilityof delta front and form liquefiedfluxoturbidite and faultedfluxoturbidite.The sediments of delta front aroundwave base plane are eroded by wave action and took along to redepositbelow wave base plane,during which turbidite is formed.Without externalmechanisms the sands in inlet of main stem can compact and descent to underneath mudstone and form fluxoturbidite.The driving force of fluxoturbidite to migrate mainly is the gravity of slumping sands.Moreover,the collision-power from hinderoverlapped sand body is also the motilityof faultedfluxoturbidite to move more distant besides its own gravity. |
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| Keywords: | delta front fluxoturbidite flume experiment seismicity wave action |
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