西南石油大学学报(自然科学版) ›› 2016, Vol. 38 ›› Issue (6): 158-163.DOI: 10.11885/j.issn.1674-5086.2015.02.04.04

• 油气化学工程 • 上一篇    下一篇

油套管钢在氯化钙溶液中腐蚀及缓蚀性能研究

黄秋伟1, 简璐2,3, 李国亮1, 杜宗和4, 王煦2   

  1. 1. 中国石油西部钻探试油公司, 新疆 克拉玛依 834000;
    2. 西南石油大学材料科学与工程学院, 四川 成都 610500;
    3. 德阳烯碳科技有限公司, 四川 德阳 618000;
    4. 中国石油新疆油田公司, 新疆 克拉玛依 834000
  • 收稿日期:2015-02-04 出版日期:2016-12-01 发布日期:2016-12-01
  • 通讯作者: 王煦,E-mail:1969wwxx@163.com
  • 作者简介:黄秋伟,1961年生,男,汉族,重庆人,高级工程师,主要从事油气层保护技术研究及完井液、压裂方面研究。E-mail:xjsyhqw@cnpc.com.cn;简璐,1990年生,女,汉族,重庆人,助理工程师,硕士,主要从事石墨烯功能性涂料及材料腐蚀与防护研究。E-mail:jian.lu@carbonene.com;李国亮,1970年生,男,汉族,河南内黄人,高级工程师,主要从事试油技术管理、科技研发工作。E-mail:xjsylgl@cnpc.com.cn;杜宗和,1984年生,男,汉族,四川盐亭人,工程师,主要从事试油监督管理工作。E-mail:xjsyduzh@petrochina.com.cn;王煦,1963年生,男,汉族,四川金堂人,教授,博士,主要从事高分子材料的应用基础与材料的腐蚀与防护研究工作。E-mail:1969wwxx@163.com

Corrosion and Inhibition Performance Study of Oil Casing Steel in Calcium Chloride Solution

HUANG Qiuwei1, JIAN Lu2,3, LI Guoliang1, DU Zonghe4, WANG Xu2   

  1. 1. Formation Testing Company of Xibu Drilling Engineering Company, CNPC, Karamay, Xinjiang 834000, China;
    2. School of Material Science and Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    3. Deyang Carbonene Technology Co. Ltd., Deyang, Sichuan 618000, China;
    4. Xinjiang Oilfield Company, CNPC, Karamay, Xinjiang 834000, China
  • Received:2015-02-04 Online:2016-12-01 Published:2016-12-01

摘要: 为了获得普通碳钢在常规压井液中腐蚀性,并找到一种腐蚀控制途径,利用失重法和电化学方法研究了N80、P110钢在1.35 g/cm3 CaCl2溶液中不同温度、高温高压,缓蚀剂种类、用量等条件下的腐蚀及缓蚀行为。实验结果表明,随温度的升高N80和P110钢腐蚀加剧,在常压60~80℃,普通碳钢自腐蚀电流密度从10-6 A/cm2增加到10-5 A/cm2;4 MPa条件下,温度从90℃升高至150℃时,腐蚀速率增大了1个数量级;80℃下,WLD31A用量仅为30 mg/L时,对N80缓蚀效率可达95.51%,P110钢缓蚀效率可达93.11%;在60~80℃,升高温度有利于提高WLD31A缓蚀效果,N80钢缓蚀效率从88.08%增加到96.51%,P110钢缓蚀效率从61.38%增加到93.11%。

关键词: 油套管钢, 氯化钙溶液, 腐蚀, 缓蚀剂, 压井液

Abstract: In order to know the corrosion resistance of ordinary carbon steel in the regular killing fluid and find a way to control its corrosion condition, weight loss method and electrochemical methods were used to study N80 and P110 steel's corrosion situation and corrosion inhibition ability in 1.35 g/cm3 CaCl2 solution at standard pressure and different temperatures, high temperature and pressure, and different types of corrosion inhibitor, dosage. The experimental results showed that with increasing temperature the corrosion of N80 and P110 steel is intensified. And at the standard pressure with the temperature range of 60~80℃, the corrosion current density of the ordinary carbon steel raised from 10-6 A/cm2 to 10-5 A/cm2. At 4 MPa with temperature rising from 90℃ to 150℃, the corrosion rate increased an order of magnitude. At 80℃ with the amount of WLD31A 30 mg/L, it improved inhibition efficiency on N80 up to 95.51%, and that on P110 up to 93.11%. Within the range of 60~80℃, elevated temperatures help to improve WLD31A inhibition effect, the inhibition efficiency of N80 increases from 88.08% to 95.51% and P110 from 61.38% to 93.11%.

Key words: oil casing steel, calcium chloride solution, corrosion, inhibitor, well control fluid

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