Corrosion Behavior of P110 Tubing Steel in the CO2-saturated Simulated Oilfield Formation Water with Element Sulfur Addition

IF 0.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

稀有金属材料与工程 Pub Date : 2018-07-01 DOI:10.1016/S1875-5372(18)30166-8

Miao Jian , Yuan Juntao , Han Yan , Xu Xiuqing , Li Lei , Wang Ke

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引用次数: 12

Abstract

With continuously growing oil and gas demand, exploitation of highly sour reservoirs brings large corrosion risks due to the coupling effects of corrosive factors including elemental sulfur, CO₂, and formation water. In the present work, corrosion behavior of P110 tubing steel in simulated oilfield formation water containing elemental sulfur and CO₂ was investigated by immersion tests and electrochemical measurements. The results indicate that increasing temperature accelerates the corrosion rate of P110 tubing steel, promotes the formation of iron sulfide, and causes serious pitting corrosion. However, influence of temperature varies in different temperature range mainly due to the different corrosion-controlling species like CO₂ at low temperatures and elemental sulfur at high temperatures. Based on the results, the coupling effects of elemental sulfur and carbon dioxide were discussed.

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添加元素硫后P110油管钢在co2饱和模拟油田地层水中的腐蚀行为

随着油气需求的不断增长，由于单质硫、CO2和地层水等腐蚀因素的耦合作用，高酸性油藏的开发带来了很大的腐蚀风险。通过浸泡试验和电化学测量，研究了P110油管钢在含单质硫和CO2的模拟油田地层水中的腐蚀行为。结果表明:温度升高加速了P110管钢的腐蚀速度，促进了硫化铁的形成，造成了严重的点蚀;而温度的影响在不同的温度范围内是不同的，主要是由于不同的腐蚀控制物质，如低温CO2和高温单质硫。在此基础上，讨论了单质硫与二氧化碳的耦合效应。

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