Conference article

Near-well simulation of oil production from a horizontal well with ICD and AICD completions in the Johan Sverdrup field using OLGA/ROCX

Ali Moradi
Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, Norway

Britt Margrethe Emilie Moldestad
Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, Norway

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Published in: Proceedings of The 61st SIMS Conference on Simulation and Modelling SIMS 2020, September 22-24, Virtual Conference, Finland

Linköping Electronic Conference Proceedings 176:35, p. 249-256

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Published: 2021-03-03

ISBN: 978-91-7929-731-2

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


One of the main principles of improving oil recovery is maximizing the contact area between the well and the reservoir. To achieve this, long horizontal wells are widely used today. However, there are challenges related to them, like water coning towards the heel and early water breakthrough. In order to tackle these issues, passive inflow control devices (ICDs) and autonomous inflow control devices (AICDs) can be used. ICDs are able to balance the drawdown pressure along the horizontal well and postpone the early water breakthrough. By adding AICDs, water can be partially choked back autonomously. The Johan Sverdrup field (JSF) is a giant oil field located in the North Sea. Since a few studies have been done on this field so far, further studies are needed to obtain more cost-effective oil recovery in this field. The main objective of this paper is near-well simulation of oil production from the well in the JSF by considering ICD and AICD completions. The simulation has been conducted based on the characteristics of the reservoir near this well for 750 days of oil production. OLGA in combination with ROCX has been used as a simulation tool. The simulation results showed that by applying both ICDs and AICDs the heel-toe effect, and heterogeneity along the well can be effectively handled and the water breakthrough can be delayed by 255 days. Moreover, it was observed that by completion of the well with AICDs, the accumulated water production can be reduced by 11.9% compared to using ICDs. In the same way, by using AICDs the flow rate of water production is reduced by 13.4% after 750 days. Furthermore, the results showed that using AICDs has a negligible impact on both the accumulated and the flow rate of oil production compared to using ICDs. Therefore, by completion of the well with AICDs more cost-effective oil production can be achieved.


horizontal well, ICD, AICD, OLGA, ROCX


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