Research On The CO₂ Flooding Injection-production Well Anticorrosion Technology

As petrochina jilin oilfield development of CO₂ flooding test research base,has carried out the black,black,black 79 stand 59 46 experimental zone.Applied in test production,CO₂ corrosion problem is increasingly serious,caused the well shaft,rod,tubing,such as pipeline caused by perforation,fracture well blowout,stop,such as leakage accidents.Not only influence the economic loss caused by production enterprises,also may do harm to human health and environmental safety.Based on CO₂ flooding injection-production well the scene of the investigation of the status quo of the corrosion,corrosion analysis was carried out on the working condition of injection-production well detailed,mastered the need to deal with the key point.In CO₂ corrosion mechanism and corrosion type,on the basis of experiments on analysis of main controlling factors on CO₂ corrosion,the influence of injection-production well find out respectively CO₂ flooding the worst corrosion conditions of injection Wells and production Wells.For effective anticorrosion methods of experimental research of jilin oilfield,from material two aspects of corrosion and corrosion of carbon steel and corrosion inhibitors,determine the field application range of the two kinds of schemes,and has carried on the brief on corrosion inhibitor filling method.Through online corrosion detection technology for anticorrosion scheme evaluation of field application,the lack of correct anticorrosion scheme,formed the CO₂ flooding injection-production well integrated anticorrosion technology route.Enhanced CO₂ corrosion status of CO₂ flooding injection-production well understanding,perfect and improve the anticorrosion measures,slow down the CO₂ corrosion degree of injection-production well CO₂ flooding pipe development,prolong service life,for the enterprise to reduce the loss caused by equipment maintenance,downtime,which provides the basis for CO₂ corrosion protection technology for the future.