The Study On Corrosion Causes And Countermeasures Of The XinTan Oilfield

The XinTan oilfield development after entering high water cut period,the oil well corrosion was badly damaged and lay well rate is high,and as a result of corrosion lie well pump inspection cycle shortened,and the rod tube changed frequently,in great economic loss.The XinTan oilfield belongs to high salinity reservoir,high salt content,water quality in weak acid,high content of Cl^-ions,is a major cause of corrosion of oil well pipe stem damage.In addition,the increasingly serious oil well corrosion degree and rod eccentric wear phenomenon is serious,interaction,and the corrosion parts mainly occurred in tube,followed by rod and pump.This topic mainly aimed at the new beach oilfield corrosion reasons,study its corrosion mechanism,aiming at the main factors affecting corrosion corresponding anti-corrosion measures and series corrosion method,the original corrosion protection system and formula of kinds and quantity optimization and optimization.Through the indoor corrosion rate experiment,the content of assessment and field corrosion influence factors that dissolve dissolved O₂,CO₂,anionic Cl^-is the main controlling factors influencing the XinTan oilfield corrosion.According to different corrosion causes,and puts forward the integrated scheme and basic countermeasures of corrosion and corrosion.Study the master of the factors leading to corrosion optimizing the adapted to the main controlling factors of different corrosion inhibitor system,and its adaptability are analyzed;In laboratory experiments,through static coupon method and microscopic microscopic observation,kinds and amount of corrosion system optimization,optimization out for new beach oilfield corrosion inhibitor system and its main control factors.Comprehensive site construction conditions and the cost consideration:some 25 to 30mg/L+SLHG corrosion inhibitors deoxidizer 15 to 20mg/L+fungicide 10mg/L formula.Main controlling factors for different corrosion and produced fluid volume,etc,the optimization of the method and process of anti-corrosion design,production of corrosion and corrosion control map for the new beach oilfield provides a series of long-term corrosion protection technology.