A new model that accurately predicts hydrate plug displacement during a one-sided depressurization is presented. This model is both simple to handle and rigorous in the physical representation of the phenomenon. It was implemented as a finite volume transient simulator capable of determining the flow field coupled with the plug displacement dynamics after its detachment. It takes into consideration velocity, pressure and temperature profiles across chambers upstream and downstream the plug at each instant of time, as well as pipe deformation due to pressure variations inside the chambers. Typical cases for deep offshore production are analyzed. The influence on the plug displacement of the gas composition, the temperature variation due to the heat loss to the environment and high pressure variation is addressed. Results show that, depending on the conditions, and after performing a careful risk evaluation, it may be safe to remediate hydrate plug by one-sided depressurization in a number of typical situations in offshore production scenario.
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ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering
July 1–6, 2012
Rio de Janeiro, Brazil
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4490-8
PROCEEDINGS PAPER
Hydrate Plug Movement by One-Sided Depressurization
Marcelo Gonçalves,
Marcelo Gonçalves
Petrobras, Rio de Janeiro, RJ, Brazil
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Ricardo Camargo,
Ricardo Camargo
Petrobras, Rio de Janeiro, RJ, Brazil
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Angela O. Nieckele,
Angela O. Nieckele
Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, Brazil
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Rafael Faraco,
Rafael Faraco
SIMDUT, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, Brazil
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Claudio Veloso Barreto,
Claudio Veloso Barreto
SIMDUT, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, Brazil
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Luis Fernando G. Pires
Luis Fernando G. Pires
SIMDUT, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, Brazil
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Marcelo Gonçalves
Petrobras, Rio de Janeiro, RJ, Brazil
Ricardo Camargo
Petrobras, Rio de Janeiro, RJ, Brazil
Angela O. Nieckele
Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, Brazil
Rafael Faraco
SIMDUT, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, Brazil
Claudio Veloso Barreto
SIMDUT, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, Brazil
Luis Fernando G. Pires
SIMDUT, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, Brazil
Paper No:
OMAE2012-83969, pp. 809-817; 9 pages
Published Online:
August 23, 2013
Citation
Gonçalves, M, Camargo, R, Nieckele, AO, Faraco, R, Barreto, CV, & Pires, LFG. "Hydrate Plug Movement by One-Sided Depressurization." Proceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. Volume 3: Pipeline and Riser Technology. Rio de Janeiro, Brazil. July 1–6, 2012. pp. 809-817. ASME. https://doi.org/10.1115/OMAE2012-83969
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