莺歌海盆地东方区黄流组层序叠加样式与海底扇内部构型

钟泽红, 张迎朝, 何小胡, 徐涛, 任建业, 刘小燕, 凌涛, 韩光明

钟泽红, 张迎朝, 何小胡, 徐涛, 任建业, 刘小燕, 凌涛, 韩光明. 莺歌海盆地东方区黄流组层序叠加样式与海底扇内部构型[J]. 海洋地质与第四纪地质, 2015, 35(2): 91-99. DOI: 10.3724/SP.J.1140.2015.02091
引用本文: 钟泽红, 张迎朝, 何小胡, 徐涛, 任建业, 刘小燕, 凌涛, 韩光明. 莺歌海盆地东方区黄流组层序叠加样式与海底扇内部构型[J]. 海洋地质与第四纪地质, 2015, 35(2): 91-99. DOI: 10.3724/SP.J.1140.2015.02091
ZHONG Zehong, ZHANG Yingzhao, HE Xiaohu, XU Tao, REN Jianye, LIU Xiaoyan, LING Tao, HAN Guangming. THE SEQUENCE STRATIGRAPHY OF HUANGLIU FORMATION AND THE INTERNAL STRUCTURES OF SUBMARINE FAN IN DONGFANG AREA,YINGGEHAI BASIN[J]. Marine Geology & Quaternary Geology, 2015, 35(2): 91-99. DOI: 10.3724/SP.J.1140.2015.02091
Citation: ZHONG Zehong, ZHANG Yingzhao, HE Xiaohu, XU Tao, REN Jianye, LIU Xiaoyan, LING Tao, HAN Guangming. THE SEQUENCE STRATIGRAPHY OF HUANGLIU FORMATION AND THE INTERNAL STRUCTURES OF SUBMARINE FAN IN DONGFANG AREA,YINGGEHAI BASIN[J]. Marine Geology & Quaternary Geology, 2015, 35(2): 91-99. DOI: 10.3724/SP.J.1140.2015.02091

莺歌海盆地东方区黄流组层序叠加样式与海底扇内部构型

基金项目: 

国家科技重大专项(2011ZX05023-004)

中海石油(中国)有限公司综合科研项目"南海西部海域典型低孔低渗油气藏勘探开发关键技术研究及实践"(CNOOC-KJ125ZDXM07LTD02ZJ11)

详细信息
    作者简介:

    钟泽红(1964-),女,高级工程师,从事含油气盆地层序地层与沉积相研究,E-mail:zhongzhh@cnooc.com.cn

  • 中图分类号: P736.2

THE SEQUENCE STRATIGRAPHY OF HUANGLIU FORMATION AND THE INTERNAL STRUCTURES OF SUBMARINE FAN IN DONGFANG AREA,YINGGEHAI BASIN

  • 摘要: 通过层序地层研究落实了莺歌海盆地东方区黄流组大型海底扇复合体的整体轮廓,并精细划分出黄流组一段6个四级层序,其中SQHL11-SQHL13层序(低位域)是东方区海底扇复合体的主要发育层位。在高分辨率层序格架分析的基础上落实了多期次海底扇朵叶的分布,时间间隔相当于五级层序的砂体在平面上的展布表现出各式各样的形态,可归结为简单扇体、复合扇体和单水道。简单扇体在本区鲜见,以东方29-1区扇朵叶为典型;复合扇体是多个简单扇砂体相互切割及叠置或弯曲水道长时间发育时产生的复杂形式,难以进一步细化,是本区的常见类型;单水道指独立存在的孤立水道。研究表明本区海底扇简单扇体及复合扇体的主要沉积单元是主水道和分支水道微相。东方区海底扇的复杂内部构型与区域构造诱导、物源及构造转换带发育等因素相关。莺歌海盆地T31层序界面形成前后发生了一系列的区域构造事件,导致了构造活动对沉积的控制;同时,东方区西部的莺西斜坡带处于构造转换带部位,使得越南中部的蓝江物源通过昆嵩隆起以盆地短轴方向进入东方区形成大面积三角洲及三角洲前方的大型海底扇,并形成类型多样化的砂体构成样式。
    Abstract: A large submarine fan complex was discovered in the Dongfang area of the Yinggehai Basin. Six 4-order sequences in the 1st Member of Huangliu Formation (SQHL1) were recognized. The submarine fan complex was mainly developed in SQHL11-SQHL13 (in LST). High resolution sequence stratigraphic analysis reveals that the submarine fan is consisted of several lobes formed in different times and the sands, which are formed as the 5th-order sequences, exhibit various shapes in a plane view. The lobes can be classified into three kinds, i.e. the simple fan lobes, complex fan lobes and single channels. Simple fan lobes, which are mainly occurred in the Dongfang 29-1 are, are rarely observed. The complex fan lobes are common, which are formed by cutting and stacking within simple fan lobes or curved channels, and could not be divided further. Single channel is the one isolated. Research shows that the simple fan and complex fan lobes in this area are related with channels and branch channels. The internal complicated structures of submarine fan owe their origin to regional tectonics, filling deposits and the development of structural transfer zone nearby. A series of regional tectonic activities occurred while the T31 sequence boundary was formed, which controlled the sedimentation of the time. In addition, the Yingxi Slope to the west of the Dongfang area was located in a structural transfer zone where the deposits from the ancient Lam River were transported through the Kontum Uplif to the Dongfang area. As the result, a huge delta and a large submarine fan complex were formed.
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  • 收稿日期:  2014-05-16
  • 修回日期:  2014-08-28

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