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O. Gerhard H. Nygaard
O. Gerhard H. Nygaard
Professor in Cybernetics, Western Norway University of Applied Sciences
Verified email at hvl.no - Homepage
Title
Cited by
Cited by
Year
Nonlinear model predictive control scheme for stabilizing annulus pressure during oil well drilling
G Nygaard, G Nævdal
Journal of Process Control 16 (7), 719-732, 2006
1222006
Evaluation of control methods for drilling operations with unexpected gas influx
LA Carlsen, G Nygaard, M Nikolaou
Journal of Process Control 23 (3), 306-316, 2013
652013
A novel model-based scheme for kick and loss mitigation during drilling
E Hauge, OM Aamo, JM Godhavn, G Nygaard
Journal of Process Control 23 (4), 463-472, 2013
622013
On the advection-upstream-splitting-method hybrid scheme: a simple transient-flow model for managed-pressure-drilling and underbalanced-drilling applications
JE Udegbunam, KK Fjelde, S Evje, G Nygaard
SPE Drilling & Completion 30 (02), 98-109, 2015
582015
Automatic model-based control scheme for stabilizing pressure during dual-gradient drilling
J Zhou, G Nygaard
Journal of Process Control 21 (8), 1138-1147, 2011
552011
Adaptive observer for kick detection and switched control for bottomhole pressure regulation and kick attenuation during managed pressure drilling
J Zhou, G Nygaard, JM Godhavn, Ø Breyholtz, EH Vefring
Proceedings of the 2010 American Control Conference, 3765-3770, 2010
522010
Reservoir characterization during underbalanced drilling (UBD): Methodology and active tests
EH Vefring, G Nygaard, RJ Lorentzen, G Naevdal, KK Fjelde
SPE Journal 11 (02), 181-192, 2006
502006
Automatic control of managed pressure drilling
Ø Breyholtz, G Nygaard, M Nikolaou
Proceedings of the 2010 American Control Conference, 442-447, 2010
442010
Reservoir characterization during underbalanced drilling: Methodology, accuracy, and necessary data
EH Vefring, G Nygaard, KK Fjelde, RJ Lorentzen, G Nævdal, A Merlo
SPE Annual Technical Conference and Exhibition?, SPE-77530-MS, 2002
442002
Evaluating nonlinear kalman filters for parameter estimation in reservoirs during petroleum well drilling
G Nygaard, G Nævdal, S Mylvaganam
2006 IEEE Conference on Computer Aided Control System Design, 2006 IEEE …, 2006
372006
Using nmpc based on a low-order model for controlling pressure during oil well drilling
GH Nygaard, LS Imsland, EA Johannessen
IFAC Proceedings Volumes 40 (5), 159-164, 2007
362007
Reservoir characterization during ubd: Methodology and active tests
EH Vefring, G Nygaard, RJ Lorentzen, G Nævdal, KK Fjelde
SPE/IADC Managed Pressure Drilling and Underbalanced Operations Conference …, 2003
362003
Automatic coordinated control of pump rates and choke valve for compensating pressure fluctuations during surge and swab operations
GH Nygaard, E Johannessen, J Einar Gravdal, F Iversen
SPE/IADC Managed Pressure Drilling and Underbalanced Operations Conference …, 2007
352007
Managed pressure drilling: A multi-level control approach
Ø Breyholtz, G Nygaard, H Siahaan, M Nikolaou
SPE Intelligent Energy International Conference and Exhibition, SPE-128151-MS, 2010
342010
A simple transient flow model for mpd and ubd applications
JE Udegbunam, KK Fjelde, S Evje, G Nygaard
SPE/IADC Managed Pressure Drilling and Underbalanced Operations Conference …, 2014
322014
Bottomhole pressure control during drilling operations in gas-dominant wells
GH Nygaard, EH Vefring, KK Fjelde, G Nævdal, RJ Lorentzen, ...
SPE Journal 12 (01), 49-61, 2007
322007
Managed-pressure drilling: Using model predictive control to improve pressure control during dual-gradient drilling
Ø Breyholtz, G Nygaard, M Nikolaou
SPE Drilling & Completion 26 (02), 182-197, 2011
302011
Evaluating control designs for co-ordinating pump rates and choke valve during managed pressure drilling operations
O Breyholtz, G Nygaard, JM Godhavn, EH Vefring
2009 IEEE Control Applications,(CCA) & Intelligent Control,(ISIC), 731-738, 2009
302009
Automatic calibration of real-time computer models in intelligent drilling control systems-results from a north sea field trial
HP Lohne, JE Gravdal, EW Dvergsnes, G Nygaard, EH Vefring
IPTC 2008: International Petroleum Technology Conference, cp-148-00219, 2008
272008
Modelling two-phase flow for control design in oil well drilling
G Nygaard, G Nævdal
Proceedings of 2005 IEEE Conference on Control Applications, 2005. CCA 2005 …, 2005
272005
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