The difference between the pool-forming kinetic system (PKS) and the petroleum system lies in that the studying contents of the kinetics system includes the studies on the relations of the key conditions with the essential processes for a pool forming, and the analysis about the oil & gas accumulation principle and the spatial-temporal distribution of hydrocarbons. There are three kinds of pool-forming kinetics systems in Toushen area. In this paper, a study on spatial-temporal matching of these key conditions and essential processes is carried out, and the law of oil & gas accumulation is specified. The difference between the pool-forming kinetic system (PKS) and the petroleum system lies in that the studying contents of the kinetics system includes the studies on the relations of the key conditions with the essential processes for a pool forming, and the analysis about the There are three kinds of pool-forming kinetics systems in Toushen area. In this paper, a study on spatial-temporal matching of these key conditions and essential processes is carried out, and the law of oil & gas accumulation is specified.