Liquid condensation in the rock near wellbore may kill gas production in gas-condensate reservoirs when pressure drops lower than the dew point. It has been proved both theoretically and experimentally that gas production in gas-condensate reservoirs could be improved by altering wettability of rock near wellbore from liquid wetness to gas wetness. However, to our best knowledge, few field applications have been reported. In this study, a pilot test was designed based on experimental results measured in the rock sampled from the target gas-condensate reservoir. The gas-condensate field, located in central China, was a high temperature and low permeability reservoir with a permeability of less than 0.1 md. About 30,000 litters of chemical solution were injected into a well in the gas-condensate field. The test results showed that the gas production of the well was increased significantly.