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注氮气三次采油井结垢腐蚀发生原因分析及防护对策

石油实验地质

2015年 37卷第S1期

阅读：143

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Title

Causes and countermeasures for scaling and corrosion in nitrogen gas injection wells

作者

郭靖邹思佳王亚洲马晓宇师朋飞

Authors

Guo Jing Zou Sijia Wang Yazhou Ma Xiaoyu Shi Pengfei

单位

中国石化西北油田分公司采油一厂, 新疆轮台 841600

Organization

No.1 Oil Production Plant, SINOPEC Northwest Company, Luntai, Xingjiang 841600, China

摘要

注氮气三次采油是油田开发中一种提高采收率的有效措施,但在注气作业过程中结垢腐蚀的发生给油气田开发过程带来了严重损失。通过分析注入介质对地面注入系统和井下管柱结垢腐蚀产生的规律及影响,表明在注入过程中混配地层水和注入氮气纯度较低是影响结垢腐蚀的主要因素。通过提高注入氮气纯度、非金属材料和牺牲阳极材料的应用能降低系统结垢腐蚀发生速率。

Abstract

Nitrogen gas injection in the third round of oil recovery is an effective way to improve recovery rate; however, scaling and corrosion bring serious oil development losses. The influence of injection agent on ground injection system and downhole strings was analyzed. The mixing of formation water and the low purity of nitrogen gas are the main causes for scaling and corrosion. We can reduce scaling and corrosion rates by using purer nitrogen gas, non-metallic materials and sacrificial anode materials.

关键词：

注氮气; 三次采油; 腐蚀; 结垢; 塔河油田;

Keywords:

nitrogen gas injection; third round of oil recovery; corrosion; scaling; Tahe Oil Field;

基金项目

DOI

https://doi.org/10.11781/sysydz2015S1073