Development of an integrated reservoir-wellbore model to examine the hydrodynamic behaviour of perforated pipes

Azadi, Mohsen, Aminossadati, Saiied M. and Chen, Zhongwei (2017) Development of an integrated reservoir-wellbore model to examine the hydrodynamic behaviour of perforated pipes. Journal of Petroleum Science and Engineering, 156 269-281. doi:10.1016/j.petrol.2017.05.027

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Author Azadi, Mohsen
Aminossadati, Saiied M.
Chen, Zhongwei
Title Development of an integrated reservoir-wellbore model to examine the hydrodynamic behaviour of perforated pipes
Journal name Journal of Petroleum Science and Engineering   Check publisher's open access policy
ISSN 0920-4105
Publication date 2017-07-01
Sub-type Article (original research)
DOI 10.1016/j.petrol.2017.05.027
Open Access Status File (Author Post-print)
Volume 156
Start page 269
End page 281
Total pages 13
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Abstract Perforated pipes are used widely in vertical and horizontal production wellbores. Understanding the fluid flow behaviour through perforated pipes by taking into consideration the wall inflow is crucial for determining the wellbore frictional characteristics. Accurate prediction of pressure drop along the perforated pipes is a key step in completion design of production wellbores. Many empirical and theoretical models have been reported in the literature to predict pressure drop and friction factor along perforated pipes. However, these models show contradictory findings which is resulted from variations in the wall inflow configuration and modelling assumptions. The fluid flow through the surrounding formation and its interactions with wellbore have been simplified in the previous models which limits their range of applicability. In this study, a three-dimensional integrated reservoir-wellbore model of fluid flow through a perforated pipe surrounded by porous media is developed via Computational Fluid Dynamics (CFD) simulation. The model is used to investigate the effect of perforation parameters including perforation density, diameter and phasing angle on the wall friction factor and the pressure drop along the perforated pipe. The simulations are carried out for pipe inlet velocities of 0.5, 2.5, and 5 m/s with inflow to pipe flow rate ratios of 0, 7.5, 15, 30%. The results from this study show that the friction factor varies linearly with the perforation density but does not change remarkably with the perforation diameter or phasing. The observed trends of wall friction factor with perforation parameters are further explained and confirmed by studying the local wall shear stress results. Increasing the number of perforations leads to a higher friction factor as well as a larger pressure drop along the pipe. It is also observed that for perforation phasing angle of 90°, the overall pressure drop has the highest value compared to other phasing angles due to intensified influence of mixing pressure drop. For turbulent flows with high Reynolds number, the accelerational pressure drop is more dominant than the frictional and mixing pressure drop for the same inflow to pipe flow rate ratios. The developed model provides an alternative solution to experimental studies of perforated pipes, while delivering more details on friction factor behaviour and overall pressure drop components.
Keyword Perforated pipe
Perforation density
Phasing angle
Friction factor
Pressure drop
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
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Created: Mon, 12 Jun 2017, 21:56:53 EST by Dr Saiied Aminossadati on behalf of School of Mechanical and Mining Engineering