第27卷
第3期
2013年6月
现代地质 GEOSCIENCE
Vol. 27Na.3 Jan 2013
深水单向迁移水道一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".2，徐艳霞*
（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）
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面成，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
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
中图分类号：TE121.3
文献标志码：A
文章编号：10008527(2013)03065309
Characteristics and Processes of Deep Water Unidirectionally-migrating
Channel-levee System
LI Hua'2,WANG Ying-min'·2,XU Qiang",HAN Zi-liang"2,XUYan-xia
(1. State Key Laboratory of Petroleum Resouroe and Prospecting, China Uniersity of Petroleum, Bejing 102249, China;
2. College of Geosciences, China Unitersity of Petroleum, Bejing 102249, China; 3. China National Offshore Oil Corporation Research Irstitute, Bejing 100027, China; 4. No.3 Oal Production Plant, Daqing Oifield Limited Company, Daqing, Heilongjiang 163113, Chine)
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 ter races. 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; con-tour current; South China Sea; Lower Congo Basin
0引言
重力流沉积提供物质输送通道，还可形成水道沉积，成为潜在的储集层。典型的重力流水道通常
重力流水道是陆坡常见的底形，其不仅能为具有“U"或“V"形的外形特征，并伴随有轴部沉收稿日期：2012-11-20：改回日期：2013-01-20；责任编辑：孙义梅。
基金项目：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）。
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。Emsil：LH840607@126.eom。 61
究。Email;wym3939@vip.sina. com。