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

Geoscience ›› 2013, Vol. 27 ›› Issue (3): 653-661.

• Engineering Geology and Environmental Geology • Previous Articles Next Articles

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

LI Hua^{1, 2}，WANG Ying-min^1,2，XU Qiang³，HAN Zi-liang^1,2，XU Yan-xia⁴

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

Abstract

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

CLC Number:

TE121.3

LI Hua，WANG Ying-min，XU Qiang，HAN Zi-liang，XU Yan-xia. Characteristics and Processes of Deep Water Unidirectionally-migrating Channel-levee System[J]. Geoscience, 2013, 27(3): 653-661.

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

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