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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
1162006
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
592013
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
562013
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
502011
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
482010
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
472015
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
432006
Automatic control of managed pressure drilling
Ø Breyholtz, G Nygaard, M Nikolaou
Proceedings of the 2010 American Control Conference, 442-447, 2010
412010
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, 2002
412002
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
352007
Automatic Coordinated Control of Pump Rates and Choke Valve for Compensating Pressure Fluctuations During Surge-and-Swab Operations
GH Nygaard, E Johannessen, JE Gravdal, FP Iversen
IADC/SPE Managed Pressure Drilling & Underbalanced Operations, 2007
342007
Reservoir characterization during ubd: Methodology and active tests
EH Vefring, G Nygaard, RJ Lorentzen, G Nævdal, KK Fjelde
IADC/SPE Underbalanced Technology Conference and Exhibition, 2003
342003
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
332007
Managed pressure drilling: A multi-level control approach
Ø Breyholtz, G Nygaard, H Siahaan, M Nikolaou
SPE Intelligent Energy Conference and Exhibition, 2010
302010
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
292011
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
292009
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
282005
A simple transient flow model for mpd and ubd applications
JE Udegbunam, KK Fjelde, S Evje, G Nygaard
SPE/IADC Managed Pressure Drilling & Underbalanced Operations Conference …, 2014
272014
Performing the dynamic shut-in procedure because of a kick incident when using automatic coordinated control of pump rates and choke-valve opening
LA Carlsen, G Nygaard, JE Gravdal, M Nikolaou, J Schubert
SPE/IADC managed Pressure Drilling and Underbalanced Operations Conference …, 2008
272008
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