Differential accumulation mode is one of the classic mode in the petroleum geology which suggests a series of conditions including a single source rock or a sustained hydrocarbon-generation evolution, a continuous hydrocarbon expulsion process, a buoyancy-based secondary migration process, a carrier system mainly based on permeable and connected sand bodies, and a unified fluid dynamic systems; current reservoir-forming theory in the continental rift basin mainly focus on continuous hydrocarbon-generation, evolutionary process, episodic charging process, carrier system time and space finiteness, abnormal fluid compartment and isolated-fluid system. This paper argues that hydrocarbon migration and accumulation suitable for differential accumulation mode can only be a special simple state. Oil and gas filling is likely to occur within a certain range of basin carrier system. The difference exists in the number of fillings. It will be discussed in practice about whether the influence of basin-scale series traps accumulation mode is a complex superimposition of a number of differential accumulation process or a simple superimposition of several periods of differential accumulation,and the influences on reservoir type and space distribution mode of different fluid are also uncertain.