Conference article

Pressure wave propagation in Managed Pressure Drilling model comparison with real life data

Christian Berg
Department of Electrical Engineering, IT and Cybernetics, University of South-Eastern Norway, Norway / Kelda Drilling Controls, Norway

Jon Åge Stakvik
Department of Engineering Cybernetics , Norwegian University of Science and Technology, Norway / Kelda Drilling Controls, Norway

Bernt Lie
Department of Electrical Engineering, IT and Cybernetics, University of South-Eastern Norway, Norway

Knut Vaagsaether
Department of Electrical Engineering, IT and Cybernetics, University of South-Eastern Norway, Norway

Glenn-Ole Kaasa
Kelda Drilling Controls, Norway

Download articlehttps://doi.org/10.3384/ecp2017091

Published in: Proceedings of The 60th SIMS Conference on Simulation and Modelling SIMS 2019, August 12-16, Västerås, Sweden

Linköping Electronic Conference Proceedings 170:14, s. 91-98

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Published: 2020-01-24

ISBN: 978-91-7929-897-5

ISSN: 1650-3686 (print), 1650-3740 (online)

Abstract

Drilling for oil and gas is a complex process, involving pumping of fluid through kilometers of pipes. Even though the drilling fluid has a high speed of sound (˜1000 m/s), the large lengths involved make pressure wave propagation significant in timescales where such phenomena can usually be neglected in other processes. Managed pressure drilling, a technological extension of conventional drilling, adds a choke on the return flow from the drilling process. Significant work has been done in recent years on creating a simplified model of the process, often by neglecting distributed dynamics, and using this for controller design. This paper compares the simplified model most often used, with a distributed partial differential equation (PDE) model and compare the performance with measured data for wave propagation while doing managed pressure drilling. Fluid structure interaction and theoretical vs recorded speed of sound are discussed.

Keywords

managed pressure drilling, PDE, wave propagation, FSI

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