Estudo experimental e numerico da dinamica de movimento de Riser em catenaria com escoamento interno / Experimental and numerical study of the motion dynamics of catenary riser considering internal flow

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The pipe which transports fluids from the petroleum production well, on the seabed, up to the production unity, on the sea surface, is named riser. The main objective of this work is to characterize the dynamic response of a riser, hanging in catenary configuration, with the influence of the internal flow of hydrocarbons. It was observed from literature, that only a few works have the approach of considering the internal flow in the riser static and dynamic behavior. On this purpose, a laboratory-scale model was designed and assembled, based on the properties of a SCR (Steel Catenary Riser). The prototype which was considered operates in 900 meters water depth and its values of field flow rates were taken into account. Flow tests were conducted with two-phase water and air mixtures, representing oil and gas inside the riser. Moreover, a numerical model from literature was implemented in order to reproduce the loading generated by the internal flow. Results obtained experimentally, in terms of displacements amplitude, response frequencies and forces, were compared with values generated for the riser model through numerical simulation. The values obtained by numerical simulation showed good agreement with experimental results, and the cases that were best represented by implementation were those that the two-phase flow occurred in slug pattern

ASSUNTO(S)

estruturas maritimas - hidrodinamica internal flow in riser escoamento bifasico petroleo - prospecção offshore petroleum production engenharia de petroleo catenary riser dynamics

ACESSO AO ARTIGO

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