摘要
为研究内表面含多腐蚀缺陷的油田高压注水管道剩余寿命问题,采用现场腐蚀挂片试验得到注水管道内腐蚀速率并分析腐蚀缺陷分布规律,在此基础上通过有限元方法研究含不同尺寸的相邻内腐蚀缺陷管道的失效压力,得到油田注水管道的剩余寿命。结果表明,腐蚀缺陷深度越大,双腐蚀缺陷交互作用间距越大,当d/t≤0.4时,相邻腐蚀缺陷轴向间距的极限作用距离L_(lim)=2.0 mm;d/t≥0.6 mm时,极限作用距离L_(lim)>2.0 mm;腐蚀缺陷越长,腐蚀缺陷之间交互作用越小,极限作用距离也越小。选取胜利油田8条注水管道为计算实例,可得管道的剩余寿命在1~5年范围内,其中2号和6号管道较为危险,在实际运行中应该加强关注和管理。
In order to study the residual life of oilfield high-pressure water injection pipelines with multiple corrosion defects on the inner surface,the corrosion rate in the water injection pipeline was obtained by on-site corrosion test and the distribution law of corrosion defects was analyzed.On this basis,the finite element method was used to study the failure pressure of adjacent internal corrosion defect pipelines of different sizes.And the remaining life of oil field water injection pipeline was obtained.The results showed that the greater the depth of corrosion defects was,the larger the interaction distance between double corrosion defects was.When d/t≤0.4,the limit action distance of the axial spacing between adjacent corrosion defects L_(lim)=2.0 mm;When d/t≥0.6 mm,the longer the limit action distance L_(lim)>2.0 mm.The smaller the interaction between corrosion defects,the smaller the limit action distance.The remaining life of 8 selected oil field water injection pipelines was calculated,and the results showed that the remaining life of the pipeline was in the range of 1~5 years.Among them,No.2 and No.6 pipelines were more dangerous,and attention and management should be strengthened in actual operation.The conclusions obtained could provide a basis for safety evaluation,pipelines inspection and maintenance of oilfield water injection pipelines.
作者
王观军
韩庆
徐树伟
陈丽娜
王安泉
Wang Guanjun;Han Qing;Xu Shuwei;Chen Lina;Wang Anquan(Shengli Oilfield Technical Testing Center,Shandong,Dongying,257000;Shengli Oilfield Testing and Evaluation Research Co.,Ltd.,Shandong,Dongying,257000;Shengli Oilfield Equipment Management Department,Shandong,Dongying,257000)
出处
《安全、健康和环境》
2021年第7期40-46,共7页
Safety Health & Environment
关键词
注水管道
腐蚀缺陷
剩余寿命
腐蚀速率
失效压力
water injection pipeline
corrosion defect
remaining life
corrosion rate
failure pressure
作者简介
第一作者:王观军,教授级高工,1991年毕业于中国石油大学(华东)焊接专业,现就职于中国石油化工股份有限公司胜利油田分公司技术检测中心,从事安全、质量、环保管理工作。
