关键词: 油气运聚单元, 远景圈闭, 边界, 含油气系统

Abstract: The petroleum system philosophy has great utility in providing an unifying concept for understanding the distribution of hydrocarbon accumulations.The concept has been used effectively to analysis and evaluate plays,but the abnormal of liquid potential energy induced by a trap was usually too weak to simulate.In present,it has been recognized that the migration-accumulation units (MAU) have more powerful influence on the discovery ratio and the risk assessment in the traps than a total petroleum system.Two important steps must be paid enough attention.The first one is that the boundary of MAU must be selected according to the critical moment on the traps forming,and the other one is that the stratum unit must be classified by the tracts of a sequence stratigraphic for simulation.The revolutionary progress on trap research will be the concept changing from "reservoir" to "carrier network".Because the migration process is hydrocarbon from source to trap,it can be simulated only in a MAU based on the carrier network.

Key words: petroleum system, migration-accumulation unit, trap assessment