TYPES OF PASSAGE SYSTEM AND ANALYSIS OF EVOLUTION OF ITS CAPABILITIES IN TEMPORAL AND SPATIAL RANGE

Petroleum migration was classified into direct and indirect migration based on the studying of its migrating characteristics and the classification of passage system.And the indirect migration was further classified.The inhomogeneity of migrating capabilities of a passage system in spatial and its influent factors such as porosity,permeability,faults,crude fractures and unconformity were analysed.It could be concluded that the migra ting capabilities of a passage system was episodic in very long time,but different passage system showed varied properties in a short time.Only diversified types of passage system were placed in their suitable locations temporally and spatially,could a commercial hydrocarbon accumulation be formed.