A Hydraulic Model for Multiphase Flow Based on the Drift Flux Model in Managed Pressure Drilling

Managed pressure drilling (MPD) is a drilling technique used to address the narrow density window under complex geological environments. It has widespread applications in the exploration and exploitation of oil and gas, both onshore and offshore. In this study, to achieve effective control of the do...

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Bibliographic Details
Published in:Energies (Basel) 2019-10, Vol.12 (20), p.3930
Main Authors: Fang, Qiang, Meng, Yingfeng, Na, Wei, Xu, Chaoyang, Gao, Li
Format: Article
Language:English
Subjects:
Accuracy
advection upwind splitting method (ausm) numerical scheme
Automation
Compressed gas
Conservation laws
drift flux model
Drilling
Exploration
Exploratory drilling
Fairs & exhibitions
Finite volume method
Fluids
Fractures
Gas hydrates
high-order accuracy
hydraulic model
Hydraulic models
Hydraulics
managed pressure drilling (mpd)
Mass flow
Multiphase flow
MUSCL schemes
Natural gas
Offshore drilling rigs
Offshore engineering
Oil exploration
Parameter estimation
Partial differential equations
Pressure
Process controls
Reynolds number
Simulation
Two phase flow
Unsteady flow
Velocity
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Summary:Managed pressure drilling (MPD) is a drilling technique used to address the narrow density window under complex geological environments. It has widespread applications in the exploration and exploitation of oil and gas, both onshore and offshore. In this study, to achieve effective control of the downhole pressure to ensure safety, a gas–liquid two-phase flow model based on the drift flux model is developed to describe the characteristics of transient multiphase flow in the wellbore. The advection upwind splitting method (AUSM) numerical scheme is used to assist with calculation and analysis, and the monotonic upwind scheme for conservation laws (MUSCLs) technique with second-order precision is adopted in combination with the Van Leer slope limiter to improve precision. Relevant data sourced from prior literature are used to validate the suggested model, the results of which reveal an excellent statistical consistency. Further, the influences of various parameters in a field application, including backpressure, density, and mass flow, are analyzed. Over the course of later-stage drilling, a combination of wellhead backpressure and displacement is recommended to exercise control.
ISSN:1996-1073
1996-1073
DOI:10.3390/en12203930