CORROSION MECHANISM AND PREVENTIVE MEASURE ABOUT CARBON DIOXIDE WELL

When production CO2 dissolution in water in the well, it can production carbonic acid who may cause electrochemical corrosion of metal,which make casing and production center tube corrosion severity. This would cause well off production or out of use if not examined and repaired in time. The corrosion mechanism and affect factor were discussed through three corrosion types example analysis. So the main preventive measures were put forward:inspect wellbore pipe string timing; optimize casing program; optimize corrosion resistance casing and tubing; add corrosion inhibitor; etc. After Using the system preventive measures, the gas production well in Subei obtained notability effect,the gas production period over ten years.