STUDY OF PETROLEUM ACCUMULATION SYSTEM AND PATHWAY SYSTEM

Petroleum accumulation system is a natural subsurface petroliferous system which includes all (essential) elements as source rock,pathway system and trap to accumulate petroleum and their effective (configuration.) The configuration of petroleum accumulation system must have the function of accumulating oil and gas which can be formed by none of the individual essential elements.Petroleum accumulation system can be divided into one source with one body,one source with two bodies,one source with three bodies,two sources with two bodies,two sources with three bodies,and three sources with three bodies according to source rock and the configuration of essential elements.Petroleum accumulation system involves the whole process of petroleum generation,migration and accumulation.The configuration of the essential elements has the function of indicating space-time regularities of distribution of petroleum accumulation system.The theoretical classification of configuration in space of the pathway system has been put forward on the basis of genetic classification method.