摘要：The magnetic storm induces geoelectric fields and geomagnetic induced currents (GIC)in the earth medium, which cause the pipeline-to-soil potentials (PSP)of long-distance buried pipelines to deviate from the safe range, aggravating the corrosion of pipelines. Monitoring data from multiple PSP on the western area of the 2nd west-east pipeline project (WEPP II)show that PSP at different locations has different amplitudes and the same or opposite variation trends. This paper study carries out 3D earth conductivity structures modeling for the area, and applies the monitoring data obtained from Urumqi geomagnetic station on September 28, 2016 as the electromagnetic excitation. In combination with the Galerkin finite element method and LZS-DSTL theory, a calculation is performed on the spatial and temporal distribution of pipeline PSP. Finally, the validity of this method is verified by comparison with the monitoring data. Based on analyzing the spatial and temporal distribution characteristics of PSP, the paper proposes two concepts of spatially distributed PSP "wave joint" and time-varying PSP "entanglement", reveals the intrinsic connection between the two based on theoretical analyses and on-site monitoring data of pipelines, and further explores the crucial factors impacting the distribution of PSP "wave joint". The research results show that the PSP "wave joint" and PSP "entanglement" are common phenomena. The "wave joint" is both the zero-crossing point for the spatial distribution of PSP and the demarcation point of the change of PSP time-domain. The extreme position of GIC often corresponds to the PSP "wave joint", providing a theoretical basis for the rational configuration of cathodic protection device of the pipeline.
© 2020, Editorial Office of ACTA PETROLEI SINICA. All right reserved.

ISSN号：0253-2697

卷、期、页：v 41,n 8,p1001-1010

发表日期：2020-08-01

收录情况：EI（工程索引）

发表期刊名称：Shiyou Xuebao/Acta Petrolei Sinica

参与作者：Bi, Wuxi,Lan, Wei

通讯作者：翟维枫

第一作者：梁志珊,左信

论文类型：期刊论文

论文概要：翟维枫,梁志珊,左信,Bi, Wuxi,Lan, Wei，Distribution characteristics of wave joint and entanglement of pipe-to-soil potential on buried pipeline induced by geomagnetic storm，Shiyou Xuebao/Acta Petrolei Sinica，2020，v 41,n 8,p1001-1010

论文题目：Distribution characteristics of wave joint and entanglement of pipe-to-soil potential on buried pipeline induced by geomagnetic storm