Abstract: Using numerical simulation method, the retrograde condensation saturation variety and the development effect of the single well dry gas injection is studied. The huff and buff results show the retrograde condensation liquid concentrates in the formation near wellbore, the maximum saturation is 17%. After the dry gas injection huff and buff in the gas condensate well, the part of the retrograde condensation liquid near the wellbore will be reversevaporized or squeezed to the far formation, the permeability of the layer near the wellbore will be improved and the production capacity of the well will be increased. The eighttime tests of the dry gas injection huff and puff of the gas condensate wells have been done in Kekeya gas condensate field, seven times succeed. The insitu test result shows, the technology of the dry gas injection huff and puff of the gas condensate well can control the damage of retrograde condensation near the well bore, improve or recover the productive capacity, which are of great significance to the development of gas condensate reservoirs.

Key words: gas condensate well, retrograde condensation, dry gas injection huff and puff, Kekeya gas condensate field, Tarim basin