Abstract:  In the development process of condensate gas reservoir, with the decline of formation pressure and the invasion of formation water, gas wells present different characteristics. Combining data of Cl- and moisture ratio, water type can be divided into three categories: condensate water, bound water and formation water. Through the analysis of moisture ratio, water-gas ratio, Cl^- and gas productivity index per meter of condensate water, bound water and formation water, the influences of different water types on gas reservoir development are studied. Combined with the geological characteristics of gas reservoir, the water controlling measures for different types of gas well are put forward.