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Numerical Simulation of Severe Slugging in Deepwater M-Shaped Subsea Jumpers

Numerical Simulation of Severe Slugging in Deepwater M-Shape...

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作者： ezeronye obinna udobuike（奥比纳）中国石油大学(北京)

学位级别：硕士

A well-known instability in multiphase flow through a pipeline-riser system,severe slugging is characterised by abrupt pressure shifts and violent flow *** can lead to safety and operational issues in the oil and gas *** is typified by cyclic intervals of no oil production preceded by times of high oil output and no gas,periods of high gas volumes and no oil;and pulsating,due to pressure variations in the flowline/pipeline produced by the gas flow interruption,resulting in oil *** it reaches the riser height,the oil slug might be hundreds of feet *** production of oil,gas,and pressure oscillations causes a sudden rise in the separator level,which can lead to separation process failure,system overflow,plant closure,flare overcharge,leak danger,jet fire,early equipment wear,production reduction,and,in extreme cases,well *** is more common in older oil fields with poor liquid and gas flow *** are several mathematical models,software,correlations,and papers regarding severe slugging of risers,and pipelines with different orientations but there is an unexplored field on the effects of severe slugging on rigid M-shaped subsea jumpers and their response to the pressure,deflection,vibration and amplitude caused by this *** knowledge of the severe slugging influence on rigid M-shaped subsea jumpers can lead us to more accurate models and software that better represent the *** severe slugging phenomena,which is induced by the flow of two-phase fluids,contribute to dynamic stresses and structural deformation,which is the focus of this *** a result of the strong slug-induced vibration,the subsea M-shaped rigid jumper will be subjected to analysis to understand the interaction of the fluid.A two-dimensional analysis of the fluid interaction study will be undertaken to capture this intricate dynamic fluid analysis Computational Fluid Dynamics *** pressure fluctuation induced by the severe slugging cyc

关键词： Severe Slugging Rigid M-shaped Jumper CFD

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