Abstract: Based on the establishment of fine geologic model for the characteristics of fault block pools,an integrated numeri- cal simulation of mega-node scale is performed.The inter- face software preprocessing for numerical simulation was programmed to realize the fidelity transform from the geolog- ic model into the numerical simulation model.A quantified criterion of history matching is established and the constraint mechanism of parameter adjustment is created to obtain the highly accurate history matching.The post-processing software of pool numeral simulation is programmed to fur- ther deepen and refine the quantitative calculation and statis- tical analysis of remaining oil.According to the established criterion for potential area,the orientation and the fine char- acterization of the potential area was performed.A good effect is acquired after the application of the method on Lijin oilfield.