Abstract: Starting from analysis of passage system unit, we conclude that fault, unconformity, carrier bed, occurrence and character of fracture are the important factors of the ability and effectiveness of transporting oil and gas. Passage systems are the system channels connecting“source”and“reservoir”. In the accumulation system frame of different types of oil and gas basins, 12 types of oil and gas passage system are pointed out. Study indicates that transportation of oil and gas is of inconsistency and heterogeneity, and the key to passage system effectiveness is space-time distribution and evolution of different passage systems. The development characteristics of passage systems in different locations of fault basin, cratonic basin and foreland basin are studied and we find out that passage system determines the direction of oil and gas migration, accumulation period and location. Based on the study, the passage system types and the controlling factors effectiveness evaluation of prototype basin and find out evaluation parameters of the space-time effectiveness. Taking the amount of migration, accumulation efficiency and the scale of oil and gas fields as evaluation criteria, the efficiency of passage system is evaluated. Study shows that formed at rift-depression period of fault basin, the platform margin facies fault and platform facies karst of cratonic basin,the foreslope and thrust belt of foreland basin are the most effective passage systems. This study provides a useful reference for studied on accumulation effectiveness and exploration planning of oil and gas basins.

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