Method of producing hydrocarbon gas

A method of producing gas from an underground formation penetrated by a production well, the production well extending to surface, the method comprising the steps of:

• allowing formation fluid comprising gas and liquid to flow from the underground formation into the production well at a production interval;
• allowing the formation fluid to separate into a gaseous component and into a liquid component;
• producing the gaseous component through the production well to the surface;
• accumulating the liquid component in the production well so as to form a liquid column having, at a drainage interval of the production well, a pressure exceeding the pressure in the surrounding formation;
• and
• allowing liquid from the liquid column at the drainage interval to drain away into the surrounding formation,
• wherein the step of allowing liquid from the liquid column to drain away comprises treating the wall of the production well at the drainage interval and/or treating the formation surrounding the drainage interval so as to increase the flow rate of liquid into the surrounding formation.