In the oil industry liquid pipelines are very important for the transport of liquids, particularly in long offshore pipelines. The operation of these oil pipelines is susceptible to the occurrence of leaks in the system. Localizing a leak in a very long oil pipeline is an important piece of information that needs to be obtained before mitigating actions can be taken. These pipelines are usually subject to the temperature gradients that exist in the bottom of the ocean, and the resulting heat transfer process may lead to wax formation and deposition. The single-phase flow that occurs in this type of offshore pipeline that presents one leak point and suffers the effects of an external temperature gradient is numerically simulated in this paper. We consider a one-dimensional mathematical model that includes conservation equations of mass, momentum and energy, and its associated numerical method to calculate the transient liquid flow inside the pipeline. We are particularly interested in testing a leak localization model based upon the intersection of the hydraulic grade lines emanating from the pipeline ends under the influence of a non-zero temperature distribution. This paper proposes to compare the results for a non-isothermal flow with the corresponding isothermal flow to study the influence of the temperature distribution upon the leak localization strategy. The flow that develops along the entire pipeline, upstream and downstream of the leak, strongly affects the pressure gradient and has a significant influence on the location of the leak. Our numerical simulations show results that allow the model sensitivity to be studied by changing the leak magnitude, for a given leak position. From this analysis, we may observe how these parameters affect the pressure gradients along the pipeline that develop upstream and downstream of the leak and the model’s ability to predict the leak location.
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2018 12th International Pipeline Conference
September 24–28, 2018
Calgary, Alberta, Canada
Conference Sponsors:
- Pipeline Division
ISBN:
978-0-7918-5188-3
PROCEEDINGS PAPER
Leak Localization Algorithm Applied to Non-Isothermal Liquid Flow in Horizontal Pipelines
Aline Figueiredo,
Aline Figueiredo
Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Carina N. Sondermann,
Carina N. Sondermann
Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Rodrigo A. C. Patricio,
Rodrigo A. C. Patricio
Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Raphael Viggiano,
Raphael Viggiano
Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Gustavo C. R. Bodstein,
Gustavo C. R. Bodstein
Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Felipe B. de F. Rachid,
Felipe B. de F. Rachid
Fluminense Federal University, Niteroi, Brazil
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Renan M. Baptista
Renan M. Baptista
PETROBRAS R&D Center, Rio de Janeiro, Brazil
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Aline Figueiredo
Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
Carina N. Sondermann
Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
Rodrigo A. C. Patricio
Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
Raphael Viggiano
Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
Gustavo C. R. Bodstein
Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
Felipe B. de F. Rachid
Fluminense Federal University, Niteroi, Brazil
Renan M. Baptista
PETROBRAS R&D Center, Rio de Janeiro, Brazil
Paper No:
IPC2018-78094, V003T04A005; 10 pages
Published Online:
November 6, 2018
Citation
Figueiredo, A, Sondermann, CN, Patricio, RAC, Viggiano, R, Bodstein, GCR, Rachid, FBDF, & Baptista, RM. "Leak Localization Algorithm Applied to Non-Isothermal Liquid Flow in Horizontal Pipelines." Proceedings of the 2018 12th International Pipeline Conference. Volume 3: Operations, Monitoring, and Maintenance; Materials and Joining. Calgary, Alberta, Canada. September 24–28, 2018. V003T04A005. ASME. https://doi.org/10.1115/IPC2018-78094
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