淖尔油田井筒缓蚀剂评价实验

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

针对淖尔油田的腐蚀现状,开展了缓蚀剂筛选与评价的室内及现场实验研究。对油田常用的缓蚀剂CT2-4、HYZ-1、CT5-9、CD-2进行筛选评价,实验结果表明:缓蚀剂CT2-4适合该油田且具有较好的缓蚀效果,其实验的7口井平均缓蚀率为86.7%。通过对N6-19油井的现场试验,利用检测加药前后产出液中铁离子含量的变化评价缓蚀效果,加入CT2-4缓蚀剂后,其产出液中铁离子含量由加药前的56.7mg/L降为1mg/L以下,并保持了较好的稳定性。现场试验说明,CT2-4缓蚀剂对淖尔油田具有良好的缓蚀效果。

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.