COMPLETION TECHNIQUE OF HIGH SOUR GAS WELL IN FEIXIANGUAN RESERVOIR OF LUOJIAZHAI GAS FIELD

H 2S and CO 2 in sour well will lead to serious corrosion of tube and casing,which endangering the safe production of the gas well.In addition,inappropriate selection of well completion method will intensify the degree of corrosion by invesigating well completion technology home and abroad,this paper introduces a kind ofcompletion method utilizing corrosion-proof materials.It applies permanent packer,special-thread inner liner and stainless wellhead to isolate sour gas and downhole production pipe string so as to prevent corrosion of tube and casing.Besides,it postpones gas well workover date.The method can be widely used in sour gas field.