Abstract: After analytical research on plugging during the gath- ering and transferring process for gas wells in Yulin gas field,natural gas is found to easily become hydrates under high pressure and low temperature,resulting in the plug- ging of surface pipelines.According to generation princi- ples of hydrates,methanol injection is adopted in Yulin gas field to prevent hydrates generation.Based on con- sumption characteristics of methanol,the calculation method of rational methanol injection is established.By u- sing this method,the methanol injection in Yulin gas field becomes more scientific.It not only decreases the fre- quency of plugging,but also reduces the methanol con- sumption,which provides a reference basis for gas wells in gas field.