集输小口径管道腐蚀弱磁检测定量评价
Quantitative evaluation of weak magnetic detection for gathering and transportation small-bore pipelines
集输小口径管道在油气田分布广泛,但使用传统腐蚀检测方法难度大、费用高且必须开挖取样点后才能定量评价腐蚀程度。为了弥补这种不足,实现非开挖条件下进行定量评价:分析磁偶极子模型得到腐蚀缺陷附近产生的漏磁场的磁信号特点; 通过有限元仿真模拟,得到了腐蚀缺陷深度及宽度与磁信号间的关系; 将SY/T 6151—2009《钢制管道管体腐蚀损伤评价方法》中对腐蚀评价所需的缺陷宽度和深度参数,结合磁偶极子模型理论推导计算与磁信号特征参数的关系,得到了一种可应用于非开挖条件下的管道腐蚀弱磁检测定量评价方法,并在某油田管道进行了工程验证,为非开挖条件下管道腐蚀检测定量评价提供一定的理论依据。
石油天然气储运
腐蚀小口径定量评价磁偶极子非开挖
吴冰.集输小口径管道腐蚀弱磁检测定量评价[EB/OL].(2024-02-07)[2025-10-24].https://chinaxiv.org/abs/202402.00136.点此复制
Small diameter pipelines are widely distributed in oil and gas fields,but the traditional corrosion detection methods are difficult and expensive,and the corrosion degree can only be quantitatively evaluated after the sampling points are excavated.In order to make up for this deficiency,quantitative evaluation under trenchless condition is realized:the magnetic signal characteristics of leakage magnetic field near corrosion defects are obtained by analyzing the magnetic dipole model; the relationship between the depth and width of corrosion defects and the magnetic signal is obtained by finite element simulation; SY/T 61512009 evaluation method for corrosion damage of steel pipeline,the defect width and depth parameters required for corrosion evaluation are combined with the magnetic dipole model theory to deduce the relationship between calculation and magnetic signal characteristic parameters,and a quantitative evaluation method for pipeline corrosion under trenchless condition by weak magnetic field detection is obtained,which is verified in an oil field pipeline project,and is suitable for Trenchless condition It provides a theoretical basis for the quantitative evaluation of pipeline corrosion detection.
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