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Geothecnical Thematic Maps of PETROBRAS Pipeway

[+] Author Affiliations
Wilson José de Oliveira

PETROBRAS / ENGENHARIA / IETEG / ETEG / EAMB, Rio de Janeiro, RJ, Brazil

Lino Francisco Rodrigues Moreira

TRANSPETRO / DT / SUPORTE / TECNOLOGIA, Rio de Janeiro, RJ, Brazil

Julio Cezar Portugal Valente, André Calixto Vieira, Áureo Furtado Dourado, Tauno Viitaniemi

TERRABYTE S/C LTDA, São Gonçalo, RJ, Brazil

Paper No. IPC2004-0485, pp. 655-662; 8 pages
doi:10.1115/IPC2004-0485
From:
  • 2004 International Pipeline Conference
  • 2004 International Pipeline Conference, Volumes 1, 2, and 3
  • Calgary, Alberta, Canada, October 4–8, 2004
  • Conference Sponsors: International Petroleum Technology Institute
  • ISBN: 0-7918-4176-6 | eISBN: 0-7918-3737-8
  • Copyright © 2004 by ASME

abstract

The Geothecnical Thematic Mapping (GTM) was created inside of The Standard for Management of the Pipeline Structural Integrity (2002) and intends to predict geothecnical risk areas. These maps were made along five thousand kilometers of pipeways. The GTM has as its purpose of classify the pipeways and adjacent areas (400 meters) according to the area’s susceptibility to geological-geothecnic accidents. From this classification, inspection frequency was established in each portion of the strip. When this work is done, it will be possible to increase the knowledge of the geothecnical problems that exist throughout pipelines, allowing to ration out the utilization of the resources applied to field inspections. This work generated these products: - Features and geothecnical risk maps through photo interpretation techniques; - Potencial Geothecnical Risk Map acquired through GIS technology. These maps are incorporated to the GIS TRANSPETRO system, in such a way that allows its utilization by all the professionals involved. The GTM was obtained from the integration of two distinguished methodologies: indirect observation, through the utilization of photo interpretation techniques and the fusion of GIS processing. The photo interpretation of aerial susceptibility to geothecnical hazard, according to its intensity which is classified as high, medium and low susceptibility. The features and classifications of the risk identified during photointerpretation were digitalized and geo-referenced, making possible the check of the models adopted in the geoprocessing. All the generated data statistics were analyzed, in a way to point out areas where there was evidence of high risk of geothecnical occurrence. These analyses allowed the elaboration of a risk index. This index was calculated to portions of 5 Km of the pipeway, allowing its ranking in terms of high, medium and low susceptibility to geothecnic. In the end of the project, the company may have a good definition of all pipeways and of all the portions that represent a major probability of problems and where to allocate money for prevention.

Copyright © 2004 by ASME

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