Page 150 - 201810

第 35 卷第 10 期 精 细 化 工 Vol.35, No.10
2018 年 10 月 FINE CHEMICALS Oct. 2018

油田化学品与油品添加剂
连续油管缓蚀用微乳液的制备与性能

1
1
1
2
1
1
1
罗明良 ，司晓冬 ，杨宗梅 ，巩锦程 ，李钦朋 ，罗 帅 ，龚 俊
〔1. 中国石油大学（华东）石油工程学院，山东 青岛 266580；2. 中国石化胜利油田分公司海洋采油厂，
山东 东营 257237〕
摘要：针对强酸性介质中连续油管常用缓蚀剂存在成膜稳定性较差、缓蚀有效期短等问题，以十二烷基三甲基
溴化铵（DTAB）、十六烷基三甲基溴化铵（CTAB）、曼尼希碱季铵盐、正丁醇、白油等为原料，利用拟三元相
图与滴液法制备了连续油管用微乳液型缓蚀剂 HSL-1。同时应用静态挂片失重法考察了缓蚀剂与酸液质量分数
以及环境温度等参数对 HSL-1 缓蚀性能的影响规律，并结合 SEM 与极化曲线分析了 HSL-1 长效缓蚀机理与效
果。结果表明：HSL-1 缓蚀剂是一种以抑制阴极过程为主的混合型缓蚀剂，分散相粒径为 15~85 nm，属于典型
的水包油型微乳液；当 HSL-1 质量分数为 1.0%~2.0%时对酸性环境下连续油管缓蚀效果最佳，腐蚀速率均为 3~
2
5 g/(m ·h)；同时水包油的微乳结构可控制缓蚀组分的释放速度，维持返排液中缓蚀组分的有效质量分数，即使
2
CT80（连续油管的钢材型号）挂片浸入乏酸 12 h，腐蚀速率仅为 0.381 g/(m ·h)，对连续油管具有持久缓蚀作用。
关键词：连续油管；酸性介质；微乳液；腐蚀速率；缓蚀机理；油田化学品
中图分类号：TE357 文献标识码：A 文章编号：1003-5214 (2018) 10-1758-07

Preparation and Performance of Microemulsion for
Corrosion Inhibition of Coiled Tubing

1
1
1
1
LUO Ming-liang , SI Xiao-dong , YANG Zong-mei , GONG Jin-cheng ,
1
2
1
LI Qin-peng , LUO Shuai , GONG Jun
（1. School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China;
2. Offshore Oil Production Plant, Sinopec Shengli Oilfield Branch Company, Dongying 257237, Shandong, China）
Abstract: To solve the problems such as poor film-forming stability and short-term protection of
conventional inhibitors for coiled tubing in strong acidic medium, a microemulsion inhibitor (HSL-1) was
prepared by quasi-ternary phase diagrams and liquid-drop method with dodecyl-trimethyl-ammonium
bromide (DTAB), hexadecyl-trimethyl-ammonium bromide (CTAB), Mannich base, n-butanol and mineral
oil as raw materials. The effects of HSL-1 mass fraction, acid mass fraction and environmental temperature
on the corrosion inhibition of HSL-1 were investigated using static weight-loss method. The mechanism
and inhibition effect of HSL-1 for coiled tubing were also analyzed by scanning electron microscope (SEM)
and polarization electrical resistance measurement. The results showed that HSL-1 was a mixed-type
inhibitor, which mainly inhibited cathodic process. The particle size of dispersed phase was in the range of
15~85 nm, which belonged to the typical O/W microemulsion. When HSL-1 mass fraction was in the range
of 1.0%~2.0%, the corrosion inhibition of HLS-1 for coiled tubing under downhole condition was the best
2
in acidic medium, and the corrosion rate was 3~5 g/(m ·h). At the same time, the O/W structure of
microemulsion controlled the release rate of the active components, which could maintain the effective
mass fraction of inhibitor in the flow-back fluid. Even after CT80 steel sample was immersed in spent acid
2
for 12 h, the corrosion rate of CT80 was only 0.381 g/(m ·h), indicating that HSL-1 had long-term corrosion
inhibition for coiled tubing.
Key words: coiled tubing; acidic medium; microemulsion; corrosion rate; inhibition mechanism; oil-field

收稿日期：2017-08-17; 定用日期：2018-02-07; DOI: 10.13550/j.jxhg.20170667
基金项目：国家自然科学基金（51674278）；“十三五”国家科技重大专项（2017ZX005030005）；山东省自然科学基金（ZR2018MEE010）
作者简介：罗明良（1974—），男，教授，博士，电话：0532-86981936，E-mail：yfsailing_wxg@163.com。