Abstract: Based on the geochemical characteristics of formation water in Sulige gas field, the distribution of gas and water in this area is studied in this paper. It is suggested that its gas and water distribution is mainly controlled by the reservoir physical property, high?quality sand body scope, gas?generating intensity and the distances between reservoirs and source rocks. Under a certain gas?generating intensity,the gas?filled level is higher in good?quality reservoirs, while it is lower in poor?quality reservoirs, thus forming isolated gas zone, gas?water zone and gas?bearing water zone. The former two zones are mainly distributed in the east?south part with higher gas?generating intensity of this field, the last zone is distributed in the middle and north parts with relatively lower gas?generating intensity. So, the closer the distance,the more developed the gas zone. On the contrary, the gas?bearing water and gas?water zones are more developed. And the gentle slope structures are of unconspicuous controlling effect on distribution of gas and water, so the gas and the water are hard to be differentiated