关键词: 注水管线, 水质分析, 结垢, 腐蚀, 阻垢缓蚀剂

Abstract: Serious scaling and corrosion occurred in the water injection line of Liaohe oil field. Local water and on site scale samples were analyzed. It was found that the water of Liaohe oil field was slightly alkaline, and its saltness, alkalinity, mineralization degree, chloride ion were relatively high, especially the content of calcium cation was much higher than that of other cations. The XRD results of scale samples showed that calcium carbonate was the most, with a little of sulfates, carbonates, silicates and rust. Based on simulation experiments, TH607B scale and corrosion inhibitor was selected for field application trial． When the concentration of TH607B was 45 mg/L, the anti-scaling rate was 90.93%-95.96%, anti-corrosive rate was 90.97%-95.33% and corrosion rate was only 0.04-0.07 mm/a.

Key words: water injection line, water quality analysis, scaling, corrosion, scale and corrosion inhibitor.