注空气泡沫驱油过程中的腐蚀与防护研究  

Corrosion and Protection in Air-Foam Injection Process

作　　者：林伟民[1] 李雪峰[1] 陈秀玲[1] 安思彤[1] 关建庆[1] 李慧宇[2] 

机构地区：[1]中国石化中原油田分公司采油工程技术研究院,河南濮阳457001 [2]中国石化中原油田分公司采油三厂,山东莘县252434

出　　处：《油田化学》2010年第3期342-345,共4页Oilfield Chemistry

摘　　要：针对空气泡沫驱油过程中的腐蚀问题,模拟现场试验条件,研究了气液交替注入频率、空气注入参数（温度、压力、湿度、流速）及不同泡沫配液体系对腐蚀速率的影响,考察了缓蚀剂和牺牲阳极的缓蚀效果,获得了注空气泡沫的相关腐蚀规律和防腐工艺技术。结果表明：气液交替次数由0增大到6、空气湿度由0增大到饱和、空气流速由0变为1.5 L/min时,挂片相应的腐蚀速率分别增加了8~9、56.6、46.6倍;空气温度和50℃时压力的变化对N80钢材的腐蚀速率影响较小,温度升高和压力增加,腐蚀速率略有增加。静态条件下,不同泡沫配液体系中的腐蚀介质对N80挂片的腐蚀速率均小于标准0.076 mm/a。缓蚀剂与牺牲阳极协同缓蚀工艺可以弥补高温下缓蚀剂缓蚀效果降低的不足,矿场试验结果表明,该协同缓蚀工艺技术的缓蚀率达92.4%,有效解决了注入管柱的腐蚀问题。The influences of water and gas alternate injection（WAG） frequency,air injection parameters including temperature,pressure,moisture and speed and different foam system were studied which aimed at the corrosion in air foam injection process.The effects of corrosion inhibitors and sacrificial anode on the corrosion rate of steel products were examined.The results showed that when WAG frequency varied from 0 to 6,air moisture changed from 0 to water saturated and air flow rate increased from 0 to 1.5 L/min,the maximum corrosion rate of corroded test piece were 8～9,56.6 and 46.6 times higher than the minimum,respectively.Corrosion rate of N80 steel was slightly increased with increasing temperature and pressure at 50℃ of injected air.Using the corrosion inhibitor combined with sacrificial anode corrosion protection technology,the corrosion question of injection string was solved effectively.Field test results showed that the inhibition rate achieved 92.4%,which provided the necessary security measures for a large scale application of the technology.

关 键 词：空气泡沫 腐蚀 缓蚀剂 牺牲阳极 中原油田 

分 类 号：TE983[石油与天然气工程—石油机械设备] TG174.41[金属学及工艺—金属表面处理]