Abstract: On the basis of strain energy and surface energy theory，by using Griffith rock-craking principle，the aperture，density，porosity and permeability of Fu-2 member reservoir fractures in Minqiao Oilfield are predicted by core fracture statistics and tectonic stress field finite element numerical simulation.The result shows lots of tectonic fractures were generated due to the paleo-stress field in Late Funing period，which mainly exist near the faults with trend of NEE and NWW.The present stress field is of modified effect on these fractures，allowing the high value of fracture parameters to appear in the high part.The value of Min 35 fault block is the highest while the density is 1.5/m，the aperture is 0.84mm，the porosity is 0.26% and the permeability in WE is 94.00mD.Effected by the direction of fractures，permeability of fracture in NS is only 5.00mD.

Key words: fracture prediction, tectonic stress, porosity, permeability, core description