GEOSCAN, résultats de la recherche

Menu GEOSCAN


TitreInvestigation of earth conductivity influence on pipe-to-soil potentials
AuteurBoteler, D H; Trichtchenko, L; Samson, C
SourceProceedings, NACE North area 2003 Eastern Conference; 2003 p. 1-13
Année2003
Séries alt.Secteur des sciences de la Terre, Contribution externe 20100343
RéunionNACE Northern Region, Eastern Conference; Ottawa; CA; Septembre 15-17, 2003
Documentlivre
Lang.anglais
Mediapapier
ProvinceOntario
SNRC31B/13; 31B/14; 31E/09; 31E/15; 31E/16; 31F/01; 31F/06; 31F/07; 31F/12; 31L/01; 31L/02; 31L/03; 31L/06
Lat/Long OENS-79.5000 -75.0000 46.5000 44.7500
Sujetspipelines; études de faisabilité du pipeline; conductivité; champ tellurique; signaux telluriques; géologie de l'ingénieur; géophysique
Illustrationslocation maps; profiles; plots
ProgrammeTargeted Hazard Assessments in Northern Canada, Géoscience pour la sécurité publique
Résumé(disponible en anglais seulement)
Telluric currents produce variations in pipe-to-soil potential (PSP) that interfere with the cathodic protection of pipelines. The amplitudes of these variations are observed to change from place to place and this is usually attributed to geomagnetic source effects or the pipeline structure. Here we report PSP observations from the North Bay - Morrisburg pipeline in eastern Ontario that show a peak in PSP variations near Arnprior. This cannot be explained by source effects or pipeline structure. It is shown instead that a geological boundary near Arnprior between high and low resistivity regions produces Earth potential variations in the same location as the peak in PSP observations. A plan of future work is described involving mapping of the electric fields at the Earth's surface across the geologic boundary, plus modelling of the Earth and pipeline potential variations.
GEOSCAN ID287387