| J55套管在长庆油田油层水中耐蚀性的对比试验 |
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| 引用本文： | 赵国仙,严密林,路民旭,李平全. J55套管在长庆油田油层水中耐蚀性的对比试验[J]. 石油机械, 1998, 0(7) |
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| 作者姓名： | 赵国仙 严密林 路民旭 李平全 |
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| 作者单位： | 中国石油天然气总公司石油管材研究所!陕西省西安市，710065，中国石油天然气总公司石油管材研究所，中国石油天然气总公司石油管材研究所，中国石油天然气总公司石油管材研究所 |
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| 摘 要： | 为定性研究长庆油田地层水对J55套管的侵蚀性，分别选取了国产和进口的J55套管试样各两种，模拟油田高温高压环境进行腐蚀试验。试验结果表明，试样表面均存在点蚀现象，4种试样的平均腐蚀速率最大为0．130mm／a，最小为0．074mm／a，相差很大。试样表面的腐蚀产物主要是FeS，说明在这种环境中，套管可能同时遭受CO2腐蚀、硫酸盐还原菌腐蚀、H2S腐蚀和垢下腐蚀，其中H2S腐蚀和垢下腐蚀引起的点蚀占主导。同时发现，试样腐蚀速率的差异和试样的金相及成分有密切关系。通过微合金化和提高材料的冶炼水平来降低P和S含量，以及通过适当的热处理使晶粒细化等方式可以提高套管材料的耐H2S和CO2腐蚀能力。
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| 关 键 词： | 套管 耐蚀性 对比试验 地层水 |
Contrast test of corrosion resistance of J55 casing in formation water |
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| Zhao Guoxian, Yan Milin, Lu Minxu,et al.. Contrast test of corrosion resistance of J55 casing in formation water[J]. China Petroleum Machinery, 1998, 0(7) |
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| Authors: | Zhao Guoxian Yan Milin Lu Minxu et al. |
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| Abstract: | To make a qualitative investigaion in the corrosion of formation water in Changqing Oilfield on J55 casings, four kinds of J55 casings are selected for a simulation test. The result of the test show that, there exists pitting cormsion on the surfaces of the samples, and the maximum mean corrosion rate is 0. 130mm/a, the minimum is 0.074mm/a. The corrosion product on the sample surfaces is mainly FeS, this means that the casing in this environment suffers CO2 corrosion, bacteria corrosion, H2S corrosion and down-scale corrosion simultaneously. The corrosion rate of the samples has a close relation to the metallurgical microstructure and chemical composition of the samples. Corresponding measures for improving the H2S and CO2 cormsion resistance of the casing maerial are presented. |
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| Keywords: | casing corrosion resistance contrast test formation water |
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