石油科技论坛

石油科技论坛 ›› 2015, Vol. 34 ›› Issue (增刊): 140-142.DOI: 10.3969/j.issn.1002-302x.2015.z1.042

• 成果推介 • 上一篇    下一篇

13Cr 管材专用超高温酸化缓蚀剂

王远, 张娟涛, 尹成先   

  1. 中国石油集团石油管工程技术研究院
  • 收稿日期:2015-07-08 出版日期:2015-10-25 发布日期:2015-11-16
  • 基金资助:
    中国石油天然气股份有限公司塔里木油田分公司科研项目“适用13Cr110管材的高温酸化缓蚀剂研究”。

Ultra-high Temperature Acidizing Corrosion Inhibitor for 13Cr Tubular Goods

Wang yuan, Zhang Juantao, Yin Chengxian   

  1. CNPC Tubular Goods Research Institute, Xi’an 710065, China
  • Received:2015-07-08 Online:2015-10-25 Published:2015-11-16
  • Supported by:
     

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摘要： 酸化是目前最常用的油田增产措施,酸化处理中酸液浓度较高,最常用质量浓度为15%的盐酸,具有很强的腐蚀性,而适用于CO2腐蚀环境的13Cr完井管柱材质却不能抵御酸液的腐蚀。为此对超级13Cr材料在酸化环境中的电化学腐蚀特性进行深入研究,提出了空间多分子层吸附理论模型,利用高温高压釜和自主研发实物装置,反复试验、评价和筛选,研制出符合油田现场技术要求的超高温超级13Cr管材专用酸化缓蚀剂TG201-II。该缓蚀剂采用双组分设计,主剂与辅剂配合,解决了13Cr钢在强酸环境中的腐蚀难题,在160℃高温环境下腐蚀速率达到了26 g/m2·h。

 

关键词: 13Cr钢, 管材, 缓蚀剂, 酸化, 超高温, 电化学

Abstract: Currently, acidizing is the most frequently used measure to stimulate oil production at oilfields. The concentration of acid solution is relatively high in the acidizing process, usually the 15 percent concentration of hydrochloric acid, which is highly corrosive to tubular goods. The 13Cr tubular material, which is developed for use under the CO2 corrosion environment, is unable to resist corrosion from acidizing solutions when used for well completion. An in-depth study is made of the electrochemical corrosion feature of the 13Cr tubular material in the acidizing environment, thus proposing the space multilayer adsorption theoretical model. Meanwhile, autoclave and self-developed oil casting test devices are used for testing, evaluation and selection of the synthesized inhibitors. Finally, a specified acidizing inhibitor, TG201-II, is developed for the 13Cr tubing steel. The inhibitor not only meets the technological requirements of oilfields but also solves the corrosion problems of the 13Cr tubular goods under the strong acid environment. The corrosion rate is 26g/m2•h at the temperature of 160°C.

Key words: 13Cr tubing steel, tubular goods, corrosion inhibitor, acidizing, ultra-high temperature, electrochemical

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