Abstract: In view of producing water?bearing gas from gas wells with low pressure, low productivity in Sulige gas field, the foam drainage gas recovery technology is studied. The experiments of four types of foaming agents in fluid?carrying capacity, dynamic carrying water and compatibility at 90℃ are tested. The results show that the foaming agent of 0.5% UT?11C is of good stability, good dynamic liquid carrying capacity and good corrosion inhibition performance. And the gas production of well has more increased than before for its better liquid carrying effect, bringing about the expected target for foam?drainage enhancing gas recovery