Abstract: The moat two remarkable characteristics of the fractured reservoir with bottom water are that its bottom aquifer is huge and that the reservoir rock fracture network is well developed,both of which will lead to water quickly channeling in the devel opment process , and thus will be complicated the underground
fluid flow due to heterogeneity of fracture network and diversity of fracture occurrence types. When the bottom water goes up into the reservoir, it vein markedly reduce the reservoir effective thickness and the drainage area of single oil well, deplete the energy in the reservoir and wellbore，and subsequently lower the recovery ratio. According to the geologic characteristics of frac-lured reservoir with bottom aquifer and on the basis of the matrix fracture super dual medium model, the influence of two-direc-
lion fracture reservoir with bottom aquifer upon reservoir dynamic
performance by means of full implicit reservoir numerical simula-lion was analyzed in detail in the paper.

Key words: fracture, reservoir with bottom waier, super dual medium model, two-direction fracture sensibility