In view of the problem that some gas Wells in tight gas reservoirs,which leads to the decline of production,the water quality analysis and the composition analysis of the blockage are carried out,and a kind of plugging agent suitable for this block is developed and evaluated.The results of indoor evaluation show that:good compatibility;Can effectively dissolve reservoir plugging;Under different temperatures,the dissolution rate of the plugging material in 16 h can reach more than 80%,and the corrosion of the pipe string is low,which meets the industry level 1 requirements.It has strong chelating ability to synthesize scale ions.The plugging agent was well applied to the field and the blockage was removed,increasing the average daily gas production per well by 7,300 m3/d.
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