中国石油大学学报（自然科学版）2025，Vol.49Issue(3)：63-72,10.DOI:10.3969/j.issn.1673-5005.2025.03.007
下刚果-刚果扇盆地A区块中新统盐构造活动背景下深水重力流沉积特征
Characteristics of deep-water gravity-flow deposits under the background of salt tectonic activities of the Miocene in Block A of the Lower Congo-Congo Fan Basin
摘要
Abstract
The complex salt tectonic activities in the Lower Congo-Congo Fan Basin have a significant influence on deep-water gravity-flow sedimentation and play a key role in controlling hydrocarbon accumulation.Understanding the relationship be-tween salt structures and deep-water gravity-flow deposition is crucial for achieving breakthroughs in deep-water petroleum ex-ploration in this region and holds considerable research significance.Based on seismic and well-log interpretation combined with seismic attribute analysis,this study investigates the depositional processes and characteristics of Miocene gravity-flow systems under the influence of salt structures in block A of the Lower Congo-Congo Fan Basin.The findings provide valuable insights for deep-water oil and gas exploration in the area.The results indicate that gravity-flow deposition in salt-structure-re-lated minibasins can be divided into two stages:an early filling-overflow stage and a later bypass-erosion stage.Sand-rich zones are closely associated with the position of the overflow point.The interactions between salt structures and gravity-flow channels can be categorized into seven types:redirection,restriction,blocking,migration,erosion,uplift,and truncation-each resulting in distinct sand body distribution patterns.The angle between the gravity flow direction and the axial orientation of the miniba-sin significantly affects lobe distribution:when the angle is large or nearly orthogonal,lobes tend to develop as elongated strips along the salt wall;when the angle is small or nearly parallel,lobes are more likely to form fan-shaped geometries.关键词
盐构造/重力流沉积/交互关系/中新统/下刚果-刚果扇盆地Key words
salt structures/gravity flow deposition/interactions/Miocene/Lower Congo-Congo Fan Basin分类
石油、天然气工程引用本文复制引用
陈华,邓秉文,吴高奎,尹继全,杨沛广,康敬程..下刚果-刚果扇盆地A区块中新统盐构造活动背景下深水重力流沉积特征[J].中国石油大学学报（自然科学版）,2025,49(3):63-72,10.基金项目
国家自然科学基金项目(92255302) （92255302）
国家科技重大专项(2016ZX05033) （2016ZX05033）
中石化基础前瞻项目(P22214-2) （P22214-2）
