STUDY ON THE SIMULATION AND APPLICATION MIGRATION PATHWAYS

The way and direction of secondary hydrocarbon migration are of decisive significance to concrete pointing out the occurrence location of hydrocarbon resources in basins. In delivery layers,the efforts driving hydrocarbon are mainly buoyancy and capillary force,and caprock plays an role of capillary resistance. Thus,the form and space distribution of caprock become important sealing factors to affect migration pathways. According to the geometric form features of caprock in this paper,the simulation models of migration pathways were established,and microcomputer softwares were developed and put into operation and enforcement. The application of migration pathway simulation to a basin reflected that it was in keeping with the known exploration situation on the whole. It can examine the geological concept of periodic hydrocarbon migration,reveal the process of migration,and predict the possible position of migration and accumulation.