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南沙海域新生代发生的多次构造运动既是盆地形成的主要原因,也是控制局部构造形成和发育的主要成因。本文以南沙海域曾母盆地典型构造为研究目标,分析了局部构造的沉降剥蚀史,进一步了解了前陆盆地局部构造沉降的特点,以及在区域动力场背景上局部构造的演化特征。在研究中采用构造高点和相邻凹陷模拟井的单井沉降史对比的方法,分析了局部构造在沉降过程中的各阶段主导因素。
The multiple tectonic movements occurred during the Cenozoic in the Nansha Sea area are not only the main reason for the basin formation but also the major cause of controlling the formation and development of local structures. In this paper, the typical structure of Zengmu basin in Nansha sea area is taken as the research target. The sedimentation and erosion history of the local structure is analyzed. The characteristics of the subsidence in the foreland basin and the evolution of local tectonics on the background of the regional dynamic field are further studied. In this study, a comparison of single-well settlement history of structural wells and adjacent wells to simulate wells was carried out, and the dominant factors of each stage in the subsidence process of local structures were analyzed.