COMPATIBILITY RESEARCH ON DRAIN- AGE GAS RECOVERY BY FOAM AND CORROSION PREVENTION OF GAS WELL IN ZHANGJIACHANG GAS FIELD AND ITS APPLICATION

Zhangjiachang gas field has come into dieaway time,most of wells keep production through drainage gas recovery by foam,in this way,H 2S and CO 2 produced from natural gas corrode equipment of gas wells seriously under the condition of formation water.For the corrosion inhibitor and foam scrubbing agent lack compatibility,some negative factors effects production.This paper studies the factors of corrosion in Zhangjiachang gas field,selects the corrosion inhibitor and foam scrubbing agent in home,and shows the plan of compatibility of the hydrophilic corrosion inhibitor.After practice in well site,the plan has advantages which not only is capable of drainage gas recovery,but also protect equipment of gas wells and solve a difficult problem in production.It is worth popularizing and applying.