The sequence stratigraphic architecture change is mainly controlled by three factors: basement subsidence or uplift, sea level change and sediment supply. However, the internal mechanism of the influence of the sediment supply on the sequence stratigraphic architecture change is not clear. In this paper, the Middle-Upper Miocene sequences in Kaiping Sag, northern South China Sea are taken as an example to discuss this issue. First, we divide and correlate the sequence through the comprehensive analysis of drilling and seismic data, and restore the seven seismic sequences in the study interval to their original form of sedimentary stage through the original form structural section restoration technique. Then, based on the original form structural section, the vertical changes of sequence stratigraphic architecture are recognized and the basement subsidence rate and sediment supply rate are estimated. Furthermore, through the correlation analysis between the sediment supply rate and the sequence stratigraphic architecture change, how the sediment supply rate affects the sequence stratigraphic architecture changes is recognized. The results show that the stratigraphic frameworks of the seven sequences are all LST-TST-HST-FRST combination, but the scale of systems tracts of each sequence varies greatly, which is quite different from the sequence stratigraphic architecture of the adjacent Baiyun Sag. The second-order cycle sea level change, basement subsidence, regional tectonic uplift and special paleogeographic environment (Kaiping Sag is located in the lateral edge of the trough zone) in the study area jointly lead to the variation of sediment supply rate in time and space, and this variable sediment supply rate is the main driving force for the change of sequence stratigraphic architecture in Kaiping Sag.

层序地层构造变化主要受三个因素控制：基底沉降或隆升，海平面变化和沉积物供应。但是，沉积物供应对层序地层构造变化影响的内在机理尚不清楚。本文以南海北部开平凹陷中上全新世序列为例，对该问题进行了探讨。首先，我们通过对钻探和地震数据的综合分析来划分和关联这些层序，并通过原始形式的结构剖面恢复技术将研究区间中的七个地震序列恢复到沉积阶段的原始形式。然后，根据原始表单结构部分，识别层序地层构造的垂直变化，并估算基底沉降速率和沉积物供应速率。此外，通过沉积物供应量与层序地层构造变化之间的相关性分析，认识到沉积物供应量如何影响层序地层构造变化。结果表明，这7个层序的地层格架均为LST-TST-HST-FRST组合，但各层系的体系尺度差异很大，与相邻的白云凹陷的层序地层构造差异很大。二阶循环海平面变化，地下陷，