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- W3113796317 abstract "随着越来越复杂开发工艺的应用，油气田现场服役环境也变得更加复杂苛刻，一些现场操作环节（如井下回注CO2、回注采出水、药剂加注、环空注氮、管道试压、维修操作等）不可避免会将O2引入井下环境。O2的混入会导致井下管材发生不可预期的腐蚀风险，尤其对以13Cr不锈钢为代表的耐蚀油套管材，潜在局部腐蚀风险很高。针对溴盐完井液中O2混入导致井下管材腐蚀风险加剧的问题，采用高温高压腐蚀模拟实验，结合扫描电镜、能谱分析等微观表征手段，研究了高温高压含O2环境下不同浓度溴盐完井液中普通13Cr和超级13Cr两种典型不锈钢油套管材的腐蚀行为及机理。结果表明：在高温高压含O2溴盐完井液环境下，两种13Cr不锈钢的腐蚀速率均较高，尤其局部腐蚀速率；参照NACE PR—0775标准，普通13Cr在1.01 g/cm3浓度的溴盐溶液中就已经属于严重腐蚀，并且随着溴盐质量浓度的升高，腐蚀程度不断加剧，在浓度为1.10 g/cm3达到极严重腐蚀；当溴盐质量浓度达到1.40 g/cm3时，两种材料的最大局部腐蚀速率均已超过5 mm/a；微观形貌分析结果表明，溴盐完井液中O2混入对13Cr不锈钢管材的耐蚀性能具有显著影响，这主要是由于O2混入降低了材料表面钝化膜的稳定性，点蚀萌生于材料基体表面致密富Cr钝化膜的破损处，向基体深部发展，蚀坑周边区域有大量腐蚀产物堆积，蚀坑与周边区域存在局部的电偶效应，进一步加速蚀坑的发展。" @default.
- W3113796317 created "2021-01-05" @default.
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- W3113796317 date "2020-09-25" @default.
- W3113796317 modified "2023-09-26" @default.
- W3113796317 title "高温高压含O 2 溴盐完井液中13Cr不锈钢的腐蚀行为研究" @default.
- W3113796317 doi "https://doi.org/10.15961/j.jsuese.201900784" @default.
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