下刚果盆地盐下构造特征及其对油气成藏的控制作用
Presalt Structure Characteristics and Its Control on Hydrocarbon Accumulation in the Lower Congo Basin

摘要： 摘要：通过对下刚果盆地不同构造部位地震剖面的解释，总结了下刚果盆地盐下构造特征，认为下刚果盆地盐下发育一中央隆起带，该隆起带将下刚果盆地划分为内裂谷带和外裂谷带，大西洋枢纽断裂(带)是中央隆起带和外裂谷带的分界线。内、外裂谷带均发育次级凸起和凹陷，呈“两凸三凹”的构造格局。下刚果盆地盐下隆坳格局控制着烃源岩、储层、盖层的类型和分布范围，控制着油气成藏组合和成藏模式。在上述研究的基础上，指出下刚果盆地盐下油气成藏的主要控制因素为断裂控制的基底构造高部位，下一步勘探方向应以寻找基底构造高垒块为主。
Abstract: Abstract:Based on the seismic interpretation of different structural profiles, the presalt structure characteristics of the Lower Congo Basin is studied and summarized, which can be divided into two sub basins by a central uplift,ie the inner and the outer riftbasins, while the Atlantic hinge line is the boundary fault between the central uplift and the outer riftbasin. In both outer and inner riftbasins, the structure characteristics can be described as two humps developed in three sags. The structure framework controls the type and distribution of the source rocks, reservoir rocks and the cap rocks, as well as the sourcereservoircap combination and accumulation model. Based on the abovementioned research, this paper points out that the uplift controlled by faults is the clear goal for the next exploration of the presalt layer in the Lower Congo Basin