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现代地质 ›› 2013, Vol. 27 ›› Issue (3): 653-661.

• 石油地质学 • 上一篇    下一篇

深水单向迁移水道-堤岸沉积体系特征及形成过程

李华1, 2 ,王英民1, 2 ,徐强3 ,韩自亮1, 2,徐艳霞4   

  1. 1中国石油大学 油气资源与探测国家重点实验室,北京102249;
    2中国石油大学 地球科学学院,北京102249;
    3中海油研究总院,北京100027;
    4大庆油田 采油三厂,黑龙江 大庆163113
  • 收稿日期:2012-11-20 修回日期:2013-01-20 出版日期:2013-06-07 发布日期:2013-06-08
  • 通讯作者: 王英民,男,教授,博士生导师,1954年出生,石油地质学专业,主要从事层序地层学、沉积学等方面的教学和研究。
  • 作者简介:李华,男,博士研究生,1984年出生,石油地质学专业,主要从事沉积学方面的研究。Email:LH840607@126.com。
  • 基金资助:

    国家重点基础研究发展计划项目(2009CB219407);国家自然科学基金项目(40972077)。

Characteristics and Processes of Deep Water Unidirectionally-migrating Channel-levee System

LI Hua1, 2,WANG Ying-min1,2,XU Qiang3,HAN Zi-liang1,2,XU Yan-xia4   

  1. 1State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum,Beijing102249,China;
    2College of Geosciences,China University of Petroleum,Beijing102249,China;
    3China National Offshore Oil Corporation Research Institute,Beijing100027,China;
    4No.3 Oil Production Plant, Daqing Oilfield Limited Company, Daqing, Heilongjiang163113, China
  • Received:2012-11-20 Revised:2013-01-20 Online:2013-06-07 Published:2013-06-08

摘要:

南海珠江口盆地白云深水区及西非下刚果盆地发育一种深水单向迁移水道-堤岸沉积体系,主要包括轴部沉积、侧积体沉积、滑塌/块状搬运复合体沉积、堤岸沉积,另见阶地。该沉积体系水道整体具有单向迁移特征,为重力流和等深流共同作用而成,水道迁移方向与等深流运动方向大致相同。其影响因素包括重力流及等深流相对能量的大小、物源、海平面升降、气候、地形、科氏力及陆架宽度等。阶地成因可分为3种,即重力流侵蚀侧积体成因、沉积失衡滑塌或断层作用成因和重力流在水道内部的差异侵蚀成因。对该沉积体系的研究不仅能加深深水沉积的认识,还可为油气进一步勘探服务。

关键词: 单向迁移, 水道-堤岸沉积体系, 侧积体沉积, 重力流, 等深流, 南海, 下刚果盆地

Abstract:

Unidirectionally-migrational channel-levee system well develops in the deep area of Baiyun of the Pearl River Mouth Basin,the South China Sea and in Lower Congo Basin,west Africa,which consists of thalweg deposits,laterally migrating deposits,slump deposits/mass transport complex deposits and levee deposits with terraces. The channel shows obviously migrating characteristic,which results from interaction between gravity flow and contour current. Furthermore,migrating direction of channel corresponds to the direction of contour current. It is likely to be controlled by relatively energy of gravity flow and contour current,sediment supply,fluctuated sealevel,climate,morphology,Coriolis force,width of shelf and so on. There are three geneses of terraces: (1) gravity flow incised the laterally migrating deposits;(2) sediment unbalance or fault lead to slump or slide; and (3) various incision of gravity flow in channel. Work on unidirectionally-migrating channel-levee system not only is helpful to improve knowledge of deep water deposits,but also provides a new prospect for oil and gas exploration.

Key words: unidirectionally-migrating, channel-levee system, laterally migrating deposit, gravity flow, contour current, South China Sea, Lower Congo Basin

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