马岭油田北三区清水腐蚀性及缓蚀剂筛选

Corrosion of Clear Water and Inhibitor Selection in Northern Maling Oilfield of Third Section

黄俊虎 白孟遥 李侃社

HUANG Junhu BAI Mengyao LI Kanshe

为了解决马岭油田北三区管道腐蚀严重的问题，以北三区清水（回注水）为研究对象，对清水水质进行了分 析，通过静态失重和电化学方法对L245N钢在北三区清水中的腐蚀行为进行了研究，并评价了六种缓蚀剂的缓 蚀效果。研究结果表明，电解质、硫酸盐还原菌、SO4 2-、Ca2+、溶解氧以及Cl-是导致金属在北三区清水中发生腐蚀 的主要原因。六种缓蚀剂中，缓蚀阻垢剂RX-211 具有最佳的缓蚀效果，用量为200 mg/L 时，缓蚀率达62.43%， L245N钢的腐蚀速率为0.0293 mm/a。图4 表3 参9

In order to solve the serious pipeline corrosion of the third section in northern Maling oilfield，the quality of the clear water（refilled water）was analyzed，the corrosion behavior of L245N steel in clear water was researched by applying weight loss method and electrochemical method and the effect of six kinds of corrosion inhibitor was evaluated. It was indicated that electrolytes，sulfate-reducing bacteria，SO4 2-，Ca2+，dissolved oxygen and Cl- were the main causes of metal corrosion in the clear water of the north third section. Among the six corrosion inhibitors，corrosion inhibitor RX-211 had the best corrosion inhibition effect. When the dosage of RX-211 was 200 mg/L，the inhibition rate reached to 62.43%，and the corrosion rate of L245N steel was 0.0293 mm/a.

10.19346/j.cnki.1000-4092.2021.01.026