摘要
CO2驱油、注水采油以及油水混输技术的应用,虽然节省了投资成本,但增加了油水混输管道CO2腐蚀失效的安全隐患。应用全瞬态多相流软件OLGA,将油水多相流模拟与CO2腐蚀预测数值仿真相结合,研究了立管角度、立管高度、入口温度、处理量、Cl-浓度、HCO3-浓度以及缓蚀剂MEG浓度对含CO2油水混输管道内腐蚀的影响。结果表明:在某些极端开发条件下,立管底部是腐蚀失效高风险点,需要提高立管底部腐蚀裕量;Cl-、缓蚀剂MEG浓度对油水混输管道内腐蚀速率的影响趋势相似,均存在浓度临界值,一旦超过该值,其对腐蚀速率的影响趋势将发生显著变化。
Although the application of CO2 displacing oil, water flood recovery and oil-water mixed transportation technologies saved the investment cost, it increased risks of CO2 corrosion failure of oil-water mixed transportation pipeline in the meantime. Full-transient multi-phase software OLGA is applied to combine the oil-water multi-phase simulation and numerical simulation of CO2 corrosion prediction, and the influence of riser angel, riser height, inlet temperature, processing capacity, CI- concentration, HCO3 concentration and inhibitor MEG concentration on pipeline internal corrosion of CO2 containing oil-water mixed transportation pipeline has been studied. Results indicate that in some extreme development conditions, the bottom of the riser is the high-risk area for corrosion failure, which demands high corrosion allowance at the bottom of the riser; CI concentration and inhibitor MEG concentration haye similar influence on the corrosion rate in oil-water mixed transportation pipeline, both of which have a critical value. Once this value is exceeded, the influence on corrosion rate will change significantly. （11 Figures, 3 Tables, 12 References）
出处
《油气储运》
CAS
北大核心
2015年第9期983-987,共5页
Oil & Gas Storage and Transportation
基金
国家自然科学基金项目"音速喷嘴中气液两相流临界分配特性及相分离控制理论"
51006123
