摘要
对东北某油田4座典型井场的高温采出液进行了取样分析。采用腐蚀模型对介质的腐蚀性进行了模拟预判,开展了静态腐蚀评价实验和动态腐蚀评价实验,并通过微观形貌分析、失重分析及腐蚀产物分析论证了集输介质温度、流速及介质中离子对腐蚀的影响。结果表明:随温度的升高,腐蚀性会逐步上升,但在介质中硫离子抑制下,温度升高至85℃后,FeS的形成会对管材的腐蚀起到缓解作用;腐蚀介质中Cl^(-)、SO_(4)^(2-)及HCO_(3)^(-)等对管道的腐蚀性影响较大,其中Cl^(-)、SO_(4)^(2-)浓度越高腐蚀性越大,HCO_(3)^(-)则是起到抑制作用,即浓度越高腐蚀性越小;流速则是管道腐蚀加速的主要诱因,在高流速下加速了介质与管道内壁的撞击,形成了较为严重的冲刷腐蚀。
High temperature produced water from four typical well sites in a certain oilfield in Northeast China was sampled and analyzed.A corrosion model was used to simulate and predict the corrosiveness of the medium.Static and dynamic corrosion evaluation tests were conducted,and the influence of temperature,flow rate,and ions in the gathering and transportation medium on corrosion was demonstrated through microscopic morphology analysis,weight loss analysis,and corrosion product analysis.The research results indicated that as the temperature increased,the corrosiveness gradually increased.However,under the suppression of sulfur ions in the medium,the formation of FeS could alleviate the corrosion of pipes when the temperature rose to 85℃.Cl^(-),SO_(4)^(2-)and HCO_(3)^(-)in corrosive media had a significant impact on the corrosiveness of pipelines.The higher the concentration of Cl^(-)and SO^(4)^(2-),the greater the corrosiveness.HCO_(3)^(-)played a inhibitory role,that was,the higher the concentration,the smaller the corrosiveness;the flow rate was the main cause of accelerating pipeline corrosion,which accelerated the impact between the medium and the inner wall of the pipeline at high flow rates,resulting in severe erosion and corrosion.
作者
刘向薇
许传欣
杜明俊
苗恩博
田野
吕浩男
LIU Xiangwei;XU Chuanxin;DU Mingjun;MIAO Enbo;TIAN Ye;LYU Haonan(China Petroleum Engineering&Construction Corp.North China Company,Renqiu Hebei 062550,China)
出处
《当代化工》
2025年第1期185-190,共6页
Contemporary Chemical Industry
基金
中国石油天然气股份有限公司科研项目(项目编号2022DJ5503)。
关键词
高温采出水
腐蚀机理
流速
腐蚀防护
High-temperature water
Corrosion mechanism
Flow rate
Corrosion protection
作者简介
刘向薇(1992-),男,工程师,硕士。E-mail:970285652@qq.com。
