Abstract: Hu?2 Well, a discovery well of the Hutubi gas field, was of complex wellbore configuration and found that there was fish in the well. The construction of Hutubi gas storage needed the plugging of several old wells similar to Hu?2 Well. So, the effective plugging of Hu?2 Well was the key of the reconstructing underground gas storage in Hutubi field. According to the geological conditions, combined with the engineering requirements, the successful plugging in this well is all gained by using ultra?fine cement slurry system and G?level micro expansion cement slurry for gas production layer, barrier layer and wellbore, respectively