交叉并行管道阴极保护干扰数值模拟

针对国内某油气管道存在的阴极保护干扰问题现状，开展检测分析并确定其阴极保护干扰特点。依据埋地管道参数和阴极保护系统工作参数，完成了对应的干扰现场数值模拟分析，结果表明：现场检测数据不能全面反映干扰电位的分布规律，现场检测阴极保护干扰时，必须采用密间隔电位测量技术（CloseIntervalPotentialSurvey，CIPS），必要时借助数值模拟技术辅助分析。为了预先了解对应治理方案的治理效果，利用数值模拟技术对治理方案进行预评估，结果显示治理方案可以消除该处管道的阴极保护干扰影响，同时对治理方案的合理性进行了讨论。借助数值模拟技术对管道阴极保护干扰进行分析的做法，可以为解决类似工程问题提供借鉴。（图7，参12）

Numerical simulation of cathodic protection interference in cross/parallel pipeline

According to the problem of cathodic protection interference in a pipeline inland, detection analysis is carried out to understand the characteristics of the cathodic protection interference. Based on the parameters of the buried pipeline and the tuning parameters of the cathodic protection system, numerical simulation analysis on the interference field is finished, and the result shows that the spot data cannot fully reflect the distribution of interference potential. Close Interval Potential Survey （CIPS） is needed during the detection of cathodic protection interference in the field, and numerical simulation technology can be used in assistant analysis if necessary. In order to predict the effect of the relevant improvement scheme, pre-evalnation of the scheme is carried out by means of the numerical simulation. The results show that this scheme can eliminate the influence of cathodic protection interference here in the pipeline and its reasonability is discussed in this paper. The way of using numerical simulation to analyze cathodic protection interference on pipeline can provide a reference to the troubleshooting similar construction problems. （7 Figures, 12 References）