Imperial College London
Alternate

ProfessorMatthewJackson

Faculty of Engineering, Department of Earth Science & Engineering

Chair in Geological Fluid Dynamics
 
 
 
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Contact

 

+44 (0)20 7594 6538m.d.jackson

 
 
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Location

 

1.34Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Dilib:2012,
author = {Dilib, FA and Jackson, MD and Mojaddam, Zadeh A and Aasheim, R and Årland, K and Gyllensten, AJ and Erlandsen, SM},
pages = {2534--2550},
title = {Closed-loop feedback control in intelligent wells: Application to a heterogeneous, thin oil-rim reservoir in the North Sea},
year = {2012}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - Important challenges remain in the development of optimized control strategies for intelligent wells, particularly with respect to incorporating the impact of reservoir uncertainty. Most optimization methods are model-based and are effective only if the model or ensemble of models used in the optimization capture all possible reservoir behaviors at the individual well and completion level. This is rarely the case. Moreover, reservoir models are rarely predictive at the spatial and temporal scales required to identify control actions. We evaluate the benefit of using closed-loop control strategies, based on direct feedback between reservoir monitoring and inflow valve settings, within a geologically heterogeneous, thin oil-rim reservoir. A high-resolution sector model is used to capture reservoir heterogeneity, which incorporates a locally refined horizontal grid in the oil zone, to accurately represent the horizontal well geometry and fluid contacts, and capture water and gas flow. Two inflow control strategies are tested. The first is an open-loop approach, using fixed inflow control devices to balance the pressure drawdown along the well, sized prior to installation. The second is a closed-loop, feedback control strategy, employing variable inflow control valves that can be controlled from the surface in response to multiphase flow data obtained downhole. We find that closed-loop control yields positive gains in NPV for the majority of cases investigated, and higher gains than open-loop strategies. Closed-loop control also yields positive gains in NPV even when the reservoir does not behave as expected. Open-loop control is risky, because unpredicted reservoir behavior can lead to negative returns. Moreover, assessing the benefits of inflow control over an arbitrarily fixed well life can be misleading, as observed gains depend on when the calculation is made. Copyright 2012, Society of Petroleum Engineers.
AU  - Dilib,FA
AU  - Jackson,MD
AU  - Mojaddam,Zadeh A
AU  - Aasheim,R
AU  - Årland,K
AU  - Gyllensten,AJ
AU  - Erlandsen,SM
EP  - 2550
PY  - 2012///
SP  - 2534
TI  - Closed-loop feedback control in intelligent wells: Application to a heterogeneous, thin oil-rim reservoir in the North Sea
ER  -
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