Abstract: This paper developed the water conning computational model for fractured gas well in consideration of both horizontal radial flow and semi?spherical flow, derived the water breakthrough time formulae for post?fracture gas well in low permeability gas reservoir with bottom water. The numerical simulation analysis shows that partial penetration of this fractured gas well could delay the conning of bottom water and the time of water breakthrough due to existence of fractures, and the longer the fracture semi?length, the better the response is. Applying these formulae into the case study of Well YS1 in such a reservoir given by Sinopec indicates that a post-fracture gas well can get delay of water breakthrough time obviously, and enhance its water?free recovery factor