Experimental Study on Evaluation of Inhibitor for Well Bore in Naoer Oilfield

Aiming to the corrosion status of Naoer oilfield, the corrosion inhibitor was screened and evaluated in laboratory and field experimental. The screened and evaluated inhibitors CT2-4, HYZ-1, CT5-9 and CD-2 are commonly used in oilfields, the experimental results show that CT2-4 is suitable for Naoer oilfield, and it has good inhibition efficiency, the average corrosion inhibition rate in seven experimental wells was 86.7%. In the field tests in well N6-19, the change of iron ion content in produced fluid after using corrosion inhibitor was applied to evaluate its inhibition efficiency. And after addition of CT2-4, the iron ion in produced fluid of well N6-19 has been reduced from 56.7mg/L to less than 1mg/L. It also keeps good stability. All the field tests show that this one has good inhibition efficiency for Naoer oilfield.