琼东南盆地松南凹陷块体流沉积特征及其演化.doc

文档介绍：
琼东南盆地松南凹陷块体流沉积特征及其
演化#
何云龙1,解习农1,商志垒1,张道军2,赛里麦2,黄灿2**
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(1. 中国地质大学构造与油气资源教育部重点实验室,湖北武汉 430074;
2. 中海石油有限公司湛江分公司,广东湛江 52405)
摘要:基于高精度三维地震资料,利用沿层切片技术,对琼东南盆地西部松南凹陷发育的块体流沉积进行
研究。通过对相关地质体研究,发现研究区块体流沉积以杂乱的地震反射为特征,同时块体流沉积的顶部
发育有小规模凹陷、内部发育有一系列的逆冲断层和变形的地层。较大规模的块体流沉积还能对下伏地层
形成较强的侵蚀作用。研究区内主要发育有 3 期块体流沉积,其中从第一期至第三期块体流沉积的规模先
变大在变小。研究区内块体流沉积都来至于盆地北部的下陆坡区,同时晚期还受到盆地西部物源的影响,
表现为至西向东的浊积水道的发育。
关键词:块体流沉积;浊积水道;沉积演化
中图分类号:
15
Deposition and evolution of mass transport deposits in the
Songnan sag, Qiongdongnan Basin
He Yunlong1, Xie Xinong1, Shang Zhilei1, Zhang Daojun2, Sai Limai2, Huang Can2
(1. Key Labrotatory of Tectonics and Petroleum Resources of Ministry of Education, China
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University of Geosciences, Wuhan 430074;
2. China National Offshore Oil Corporation Ltd., Zhanjiang 524057, China)
Abstract: Based on 3D-high resolution seismic data, deposition and evolution of mass transport
deposits (MTDs) in the study area has been studied by using horizon slice technique. The detailed
study found that MTDs developed in the study area are characterized by chaotic seismic reflections. A
series of small depressions are developed on the top of the MTDs, which could trap the sediment
transported subsequently. Trusts and deformed strata mon in the mainbody of the MTDs. In
addition, MTDs on a large scale could erode the strata underlying with a dist