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高酸性气田地面集输管线电化学腐蚀研究 预览 被引量:6

Researches on the Electrochemical Corrosion of the Gathering Lines in Sour Gas Fields
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摘要 在高酸性天然气的集输过程中,元素硫和凝析水/地层水很有可能沉积在集输管线的底部,导致管线的严重腐蚀。针对这种现象,开展了地面集输管线材料的电化学腐蚀研究。室内研究结果表明,当元素硫悬浮在试验介质中时,L245的腐蚀速率为0.0937mm/a;而试验材料浸没在元素硫中时,L245的腐蚀速率为23.068mm/a,且以局部腐蚀为主。在现场试验条件下,天然气流速为0m/s时,会出现凝析水/模拟盐水以及元素硫的沉积,导致L360的腐蚀特别严重(1.267mm/a),在较高的流速(2.25m/s和4.0m/s)下,随着流速的增大,L360的腐蚀速率有所上升(分别为0.177mm/a和0.362mm/a),但比流速为0时要小;增加水中Cl^-含量会加剧材料的腐蚀。研究结果表明,元素硫和地层水/凝析水的沉积对管线腐蚀的影响特别大,应重视其防护方法。 Elemental sulfur and produced water would deposit in the gathering lines of sour gas, and led to serious corrosion of the gathering lines. Based on these phenomena, research on the electrochemical corrosion of the gathering lines were carried out. The laboratory results showed that the corrosion rate of L245 metal was 0.0937mm/a when the elemental sulfur was suspended in the water. It increased to 23.068mm/a when L245 was immerged in the elemental sulfur, and the corrosion type was localized corrosion. The corrosion rate of L360 was 1.267 mm/a when the velocity was very low (for example, 0 m/s) in the field because produced water and elemental sulfur would deposit. The corrosion rate of L360 were 0.177 mm/a and 0.362 mm/a when the velocity of the sour gas was 2.25m/s and 4.0m/s respectively, which were much lower than the corrosion rate in the low velocity (such as 0). The corrosion rate of the materials would accelerate when Cl-content in the water increased. Deposition of elemental and produced water would have a great influence on the corrosion of the gathering lines based on the results. Therefore, inhibition methods should be considered.
作者 刘志德 谷坛 唐永帆 李国浩 霍绍全 Liu Zhide,Gu Tan,Tang Yongfan,et al(Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gasfield Company)
出处 《石油与天然气化工》 CAS CSCD 北大核心 2007年第1期 55-58,共4页 Chemical Engineering of Oil and Gas
关键词 酸气集输管线 电化学腐蚀 元素硫 流速 sour gas gathering lines, electrochemical corrosion, elemental sulfur, velocity
作者简介 刘志德:1972年生,男,工程师。1999年毕业于西南石油学院应用化学专业,获硕士学位,毕业后一直从事油气田腐蚀与防护研究工作。目前已经在NACE(美国腐蚀工程师协会)、天然气工业以及石油与天然气化工等刊物上发表7篇文章。地址(610213):四川省成都市双流华阳天研路1号天然气研究院。
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参考文献4

  • 1《油气田腐蚀与防护技术手册》编委会编..油气田腐蚀与防护技术手册 下[M].北京:石油工业出版社,1999:355~575.
  • 2卢绮敏等.石油工业中的腐蚀与防护,化学工业出版社(北京),2001 被引量:4
  • 3刘志德,黄黎明,杨仲熙,谷坛,孙绪晖,熊伟.高含硫环境中地面集输管线材质腐蚀影响因素[J].天然气工业,2004,24(12):122-123. 被引量:25
  • 4Liu Zhide, et al. Corrosion influencing factors of sour gas wells in Chuandongbei, China. Materials Performance, August 2006. 被引量:1

二级参考文献3

  • 1David W Whitmore, P Eng.Corrosion experiences and inhibitions practices in wet sour gas gathering systems.CORROSION 87/46,1987 被引量:1
  • 2Gerus B R D. Detection and mitigation of weight loss corrosion in sour gas gathering systems. In:H2 S corrosion in oil & gas production. A compilation of classic papers,1981 被引量:2
  • 3Alberto Valdes, Raymundo Case. The effect of small amount of H2 S on CO2 corrosion of a carbon steel. CORROSION 98/22,1998 被引量:1

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