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1

[Society of Petroleum Engineers SPE/IADC Drilling Conference - Amsterdam, Netherlands (2001-02-27)] SPE/IADC Drilling Conference - Underbalanced Drilling: Real Time Data Interpretation and Decision Support

Lorentzen, Rolf J., Fjelde, Kjell Kåre, Frøyen, Johnny, Lage, Antonio C.V.M., Nævdal, Geir, Vefring, Erlend H.

Language:

english

File:

PDF, 583 KB

english

2

[Society of Petroleum Engineers SPE Annual Technical Conference and Exhibition - Dallas, Texas (2005-10-09)] SPE Annual Technical Conference and Exhibition - Analysis of the Ensemble Kalman Filter for Estimation of Permeability and Porosity in Reservoir Models

Lorentzen, Rolf Johan, Naevdal, Geir, Valles, Brice, Berg, Aina, Grimstad, Alv-Arne

Language:

english

File:

PDF, 218 KB

english

3

[Society of Petroleum Engineers SPE Annual Technical Conference and Exhibition - (2005.10.9-2005.10.12)] Proceedings of SPE Annual Technical Conference and Exhibition - Analysis of the Ensemble Kalman Filter for Estimation of Permeability and Porosity in Reservoir Models

Lorentzen, Rolf, Naevdal, Geir, Valles, Brice, Berg, Aina, Grimstad, Alv-Arne

Year:

2005

Language:

english

File:

PDF, 218 KB

english, 2005

4

[Society of Petroleum Engineers SPE Russian Oil and Gas Conference and Exhibition - Moscow, Russia (2010-10-26)] SPE Russian Oil and Gas Conference and Exhibition - Soft Multiphase Flow Metering for Accurate Production Allocation

Lorentzen, Rolf Johan, Saevareid, Ove, Naevdal, Geir

Language:

english

File:

PDF, 208 KB

english

5

An auxiliary adaptive Gaussian mixture filter applied to flowrate allocation using real data from a multiphase producer

Lorentzen, Rolf J., Stordal, Andreas S., Hewitt, Neal

Journal:

Computers & Geosciences

Year:

2017

Language:

english

File:

PDF, 1.37 MB

english, 2017

6

Simultaneous assimilation of production and seismic data: application to the Norne field

Lorentzen, Rolf J., Bhakta, Tuhin, Grana, Dario, Luo, Xiaodong, Valestrand, Randi, Nævdal, Geir

Journal:

Computational Geosciences

Year:

2019

Language:

english

File:

PDF, 3.40 MB

english, 2019

7

Results of the Brugge Benchmark Study for Flooding Optimization and History Matching

Peters, Lies, Arts, Rob, Brouwer, Geert, Geel, Cees, Cullick, Stan, Lorentzen, Rolf, Chen, Yan, Dunlop, Neil, Vossepoel, Femke, Xu, Rong

Journal:

SPE Reservoir Evaluation & Engineering

Year:

2010

Language:

english

File:

PDF, 1.26 MB

english, 2010

8

[Society of Petroleum Engineers SPE Reservoir Simulation Symposium - The Woodlands, Texas (2009-02-02)] SPE Reservoir Simulation Symposium - Closed Loop Reservoir Management Using the Ensemble Kalman Filter and Sequential Quadratic Programming

Lorentzen, Rolf Johan, Shafieirad, Ali, Naevdal, Geir

Language:

english

File:

PDF, 1.23 MB

english

9

An iterative version of the adaptive Gaussian mixture filter

Stordal, Andreas S., Lorentzen, Rolf J.

Journal:

Computational Geosciences

Year:

2014

Language:

english

File:

PDF, 1.46 MB

english, 2014

10

Toward an enhanced Bayesian estimation framework for multiphase flow soft-sensing

Luo, Xiaodong, Lorentzen, Rolf J, Stordal, Andreas S, Nævdal, Geir

Journal:

Inverse Problems

Year:

2014

Language:

english

File:

PDF, 1.32 MB

english, 2014

11

Optimization of Well Trajectory Under Uncertainty for Proactive Geosteering

Chen, Yan, Lorentzen, Rolf Johan, Vefring, Erlend H

Journal:

Year:

2015

Language:

english

File:

PDF, 1.13 MB

english, 2015

12

Estimating Facies Fields by Use of the Ensemble Kalman Filter and Distance Functions--Applied to Shallow-Marine Environments

Lorentzen, Rolf J., Nævdal, Geir, Shafieirad, Ali

Journal:

Year:

2013

Language:

english

File:

PDF, 2.37 MB

english, 2013

13

Iterative Ensemble Smoother as an Approximate Solution to a Regularized Minimum-Average-Cost Problem: Theory and Applications

Luo, Xiaodong, Stordal, Andreas S., Lorentzen, Rolf J., Naevdal, Geir

Journal:

Year:

2015

Language:

english

File:

PDF, 3.14 MB

english, 2015

14

[Society of Petroleum Engineers SPE Annual Technical Conference and Exhibition - San Antonio, Texas (2002-09-29)] SPE Annual Technical Conference and Exhibition - Reservoir Characterization during Underbalanced Drilling: Methodology, Accuracy, and Necessary Data

Vefring, Erlend H., Nygaard, Gerhard, Fjelde, Kjell Kåre, Lorentzen, Rolf Johan, Nævdal, Geir, Merlo, Antonino

Language:

english

File:

PDF, 484 KB

english

15

Bottomhole Pressure Control During Drilling Operations in Gas-Dominant Wells

Nygaard, Gerhard Haukenes, Vefring, Erlend H., Fjelde, Kjell Kåre, Naevdal, Geir, Lorentzen, Rolf Johan, Mylvaganam, Saba

Journal:

Year:

2007

Language:

english

File:

PDF, 1.77 MB

english, 2007

16

STATE ESTIMATION OF A LARGE-SCALE SYSTEM IN THE PETROLEUM INDUSTRY: THE ENSEMBLE KALMAN FILTER FOR UPDATING RESERVOIR MODELS

Næivdal, Geir, Bianco, Alberto, Cominelli, Alberto, Dovera, Laura, Lorentzen, Rolf Johan, Vallès, Brice

Journal:

IFAC Proceedings Volumes

Year:

2007

Language:

english

File:

PDF, 177 KB

english, 2007

17

Reservoir Characterization During Underbalanced Drilling (UBD): Methodology and Active Tests

Vefring, Erlend H., Nygaard, Gerhard H., Lorentzen, Rolf J., Naevdal, Geir, Fjelde, Kjell K.

Journal:

Year:

2006

Language:

english

File:

PDF, 1.65 MB

english, 2006

18

[Society of Petroleum Engineers SPE Annual Technical Conference and Exhibition - Florence, Italy (2010-09-19)] SPE Annual Technical Conference and Exhibition - Rate Allocation: Combining Transient Well Flow Modelling and Data Assimilation

Lorentzen, Rolf Johan, Saevareid, Ove, Naevdal, Geir

Language:

english

File:

PDF, 132 KB

english

19

[Society of Petroleum Engineers SPE Annual Technical Conference and Exhibition - New Orleans, Louisiana (2001-09-30)] SPE Annual Technical Conference and Exhibition - Underbalanced and Low-head Drilling Operations: Real Time Interpretation of Measured Data and Operational Support

Lorentzen, Rolf J., Fjelde, Kjell Kåre, Frøyen, Jonny, Lage, Antonio C.V.M., Nævdal, Geir, Vefring, Erlend H.

Language:

english

File:

PDF, 551 KB

english

20

[Society of Petroleum Engineers SPE Annual Technical Conference and Exhibition - (2001.09.30-2001.10.3)] Proceedings of SPE Annual Technical Conference and Exhibition - Underbalanced and Low-head Drilling Operations: Real Time Interpretation of Measured Data and Operational Support

Lorentzen, Rolf, Fjelde, Kjell, Jonny, Frøyen, Lage, Antonio, Geir, Nævdal, Vefring, Erlend

Year:

2001

Language:

english

File:

PDF, 551 KB

english, 2001

21

History Matching Channelized Reservoirs Using the Ensemble Kalman Filter

Lorentzen, Rolf J., Flornes, Kristin M., Nævdal, Geir

Journal:

Year:

2012

Language:

english

File:

PDF, 2.80 MB

english, 2012

22

[Society of Petroleum Engineers IADC/SPE Underbalanced Technology Conference and Exhibition - Houston, Texas (2003-03-25)] IADC/SPE Underbalanced Technology Conference and Exhibition - Reservoir Characterization during UBD: Methodology and Active Tests

Vefring, Erlend H., Nygaard, Gerhard, Lorentzen, Rolf Johan, Nævdal, Geir, Fjelde, Kjell Kåre

Language:

english

File:

PDF, 1.07 MB

english

23

[Society of Petroleum Engineers SPE Annual Technical Conference and Exhibition - Dallas, Texas (2005-10-09)] SPE Annual Technical Conference and Exhibition - Tuning of Computer Model Parameters in Managed Pressure Drilling Applications Using an Unscented Kalman Filter Technique

Gravdal, Jan Einar, Lorentzen, Rolf Johan, Fjelde, Kjell Kaare, Vefring, Erlend Heggelund

Language:

english

File:

PDF, 293 KB

english

24

[Society of Petroleum Engineers IADC/SPE Underbalanced Technology Conference and Exhibition - (2003.03.25-2003.03.26)] Proceedings of IADC/SPE Underbalanced Technology Conference and Exhibition - Reservoir Characterization During UBD: Methodology and Active Tests

Vefring, Erlend, Gerhard, Nygaard, Lorentzen, Rolf, Geir, Nævdal, Fjelde, Kjell

Year:

2003

Language:

english

File:

PDF, 1.07 MB

english, 2003

25

[Society of Petroleum Engineers SPE Annual Technical Conference and Exhibition - (2005.10.9-2005.10.12)] Proceedings of SPE Annual Technical Conference and Exhibition - Tuning of Computer Model Parameters in Managed-Pressure Drilling Applications Using an Unscented Kalman Filter Technique

Gravdal, Jan, Lorentzen, Rolf, Fjelde, Kjell, Vefring, Erlend

Year:

2005

Language:

english

File:

PDF, 293 KB

english, 2005

26

[Society of Petroleum Engineers SPE Asia Pacific Oil and Gas Conference and Exhibition - Brisbane, Queensland, Australia (2010-10-18)] SPE Asia Pacific Oil and Gas Conference and Exhibition - Wired Drill Pipe Telemetry Enables Real-Time Evaluation of Kick During Managed Pressure Drilling

Gravdal, Apr Einar, Lorentzen, Rolf Johan, Time, Rune Wiggo

Language:

english

File:

PDF, 567 KB

english

27

Tuning of Computer Model Parameters in Managed-Pressure Drilling Applications Using an Unscented-Kalman-Filter Technique

Gravdal, Jan Einar, Lorentzen, Rolf Johan, Fjelde, Kjell-Kaare, Vefring, Erlend H.

Journal:

Year:

2010

Language:

english

File:

PDF, 660 KB

english, 2010

28

Group therapy in community mental health centres

Lorentzen, Steinar, Ruud, Torleif, Gråwe, Rolf W.

Journal:

Nordic Psychology

Year:

2010

Language:

english

File:

PDF, 265 KB

english, 2010

29

Estimation of Production Rates With Transient Well-Flow Modeling and the Auxiliary Particle Filter

Lorentzen, Rolf J., Stordal, Andreas, Nævdal, Geir, Karlsen, Hans A., Skaug, Hans J.

Journal:

Year:

2014

Language:

english

File:

PDF, 474 KB

english, 2014

30

[Society of Petroleum Engineers SPE/IADC Underbalanced Technology Conference and Exhibition - Houston, Texas (2004-10-11)] SPE/IADC Underbalanced Technology Conference and Exhibition - Bottomhole Pressure Control During Pipe Connection in Gas-Dominant Wells

Nygaard, Gerhard H., Vefring, Erlend H., Fjelde, Kjell Kåre, Nævdal, Geir, Lorentzen, Rolf Johan, Mylvaganam, Saba

Language:

english

File:

PDF, 560 KB

english

31

[Society of Petroleum Engineers SPE/IADC Middle East Drilling Technology Conference and Exhibition - Dubai, United Arab Emirates (2005-09-12)] SPE/IADC Middle East Drilling Technology Conference and Exhibition - Evaluation of drillstring and casing instrumentation needed for reservoir characterization during drilling operations

Nygaard, Gerhard Haukenes, Naevdal, Geir, Lorentzen, Rolf Johan, Vefring, Erlend Heggelund

Language:

english

File:

PDF, 594 KB

english

32

[Society of Petroleum Engineers Intelligent Energy Conference and Exhibition - Amsterdam, The Netherlands (2006-04-11)] Intelligent Energy Conference and Exhibition - A New Approach For Dynamic Optimization Of Water Flooding Problems

Lorentzen, Rolf Johan, Berg, Aina, Naevdal, Geir, Vefring, Erlend H.

Language:

english

File:

PDF, 410 KB

english

33

[Society of Petroleum Engineers SPE/IADC Drilling Conference - (2001.02.27-2001.03.1)] Proceedings of SPE/IADC Drilling Conference - Underbalanced Drilling: Real Time Data Interpretation and Decision Support

Lorentzen, Rolf, Fjelde, Kjell, Johnny, Frøyen, Lage, Antonio, Geir, Nævdal, Vefring, Erlend

Year:

2001

Language:

english

File:

PDF, 583 KB

english, 2001

34

[Society of Petroleum Engineers Intelligent Energy Conference and Exhibition - (2006.04.11-2006.04.13)] Proceedings of Intelligent Energy Conference and Exhibition - A New Approach for Dynamic Optimization of Waterflooding Problems

Lorentzen, Rolf, Berg, Aina, Naevdal, Geir, Vefring, Erlend

Year:

2006

Language:

english

File:

PDF, 410 KB

english, 2006

35

[Society of Petroleum Engineers SPE/IADC Middle East Drilling Technology Conference and Exhibition - (2005.09.12-2005.09.14)] Proceedings of SPE/IADC Middle East Drilling Technology Conference and Exhibition - Evaluation of Drillstring and Casing Instrumentation Needed for Reservoir Characterization During Drilling Operations

Nygaard, Gerhard, Naevdal, Geir, Lorentzen, Rolf, Vefring, Erlend

Year:

2005

Language:

english

File:

PDF, 594 KB

english, 2005

36

[Society of Petroleum Engineers SPE/IADC Underbalanced Technology Conference and Exhibition - (2004.10.11-2004.10.12)] Proceedings of SPE/IADC Underbalanced Technology Conference and Exhibition - Bottomhole Pressure Control During Pipe Connection in Gas-Dominant Wells

Nygaard, Gerhard, Vefring, Erlend, Fjelde, Kjell, Geir, Nævdal, Lorentzen, Rolf, Saba, Mylvaganam

Year:

2004

Language:

english

File:

PDF, 560 KB

english, 2004

37

[Society of Petroleum Engineers SPE Annual Technical Conference and Exhibition - (2002.09.29-2002.10.2)] Proceedings of SPE Annual Technical Conference and Exhibition - Reservoir Characterization during Underbalanced Drilling: Methodology, Accuracy, and Necessary Data

Vefring, Erlend, Gerhard, Nygaard, Fjelde, Kjell, Lorentzen, Rolf, Geir, Nævdal, Antonino, Merlo

Year:

2002

Language:

english

File:

PDF, 484 KB

english, 2002

38

[International Petroleum Technology Conference International Petroleum Technology Conference - Doha, Qatar (2009-12-07)] International Petroleum Technology Conference - History Matching Channelized Reservoirs Using the Ensemble Kalman Filter

Lorentzen, Rolf Johan, Flornes, Kristin Margrethe, Naevdal, Geir

Language:

english

File:

PDF, 1.22 MB

english

39

[Society of Petroleum Engineers SPE EUROPEC/EAGE Annual Conference and Exhibition - Vienna, Austria (2011-05-23)] SPE EUROPEC/EAGE Annual Conference and Exhibition - Estimating Facies Felds using the Ensemble Kalman Filter and Distance Functions-Applied to Shallow-marine Environments

Lorentzen, Rolf Johan, Naevdal, Geir, Shafieirad, Ali

Language:

english

File:

PDF, 2.08 MB

english

40

[Society of Petroleum Engineers SPE Russian Oil and Gas Conference and Exhibition - Moscow, Russia (2010-10-26)] SPE Russian Oil and Gas Conference and Exhibition - Soft Multiphase Flow Metering for Accurate Production Allocation (Russian)

Lorentzen, Rolf Johan, Saevareid, Ove, Naevdal, Geir

Language:

russian

File:

PDF, 131 KB

russian

41

Estimation of Production Rates by Use of Transient Well-Flow Modeling and the Auxiliary Particle Filter: Full-Scale Applications

Lorentzen, Rolf J., Stordal, Andreas S., Luo, Xiaodong, Naevdal, Geir

Journal:

SPE Production & Operations

Year:

2016

Language:

english

File:

PDF, 1.03 MB

english, 2016

42

[Society of Exploration Geophysicists SEG Technical Program Expanded Abstracts 2017 - Houston, Texas (24 September to 29 September)] SEG Technical Program Expanded Abstracts 2017 - Estimation of pressure-saturation and porosity fields from seismic acoustic impedance data using an ensemble-based method

Bhakta, Tuhin, Luo, Xiaodong, Lorentzen, Rolf, Nævdal, Geir

Language:

english

File:

PDF, 2.43 MB

english

43

[Society of Petroleum Engineers SPE Norway One Day Seminar - Bergen, Norway (2018-04-18)] SPE Norway One Day Seminar - Correlation-Based Adaptive Localization for Ensemble-Based History Matching: Applied to the Norne Field Case Study

Luo, Xiaodong, Lorentzen, Rolf, Valestrand, Randi, Evensen, Geir

Language:

english

File:

PDF, 2.43 MB

english

44

Combined Effect of Alcohol and Hypoxia on Flicker Fusion Frequency

Rokseth, Rolf, Lorentzen, Fridtjov Vogt

Journal:

Journal of Applied Physiology

Year:

1954

Language:

english

File:

PDF, 949 KB

english, 1954

45

OLYMPUS optimization under geological uncertainty

Chang, Yuqing, Lorentzen, Rolf J., Nævdal, Geir, Feng, Tao

Journal:

Computational Geosciences

Year:

2019

Language:

english

File:

PDF, 4.08 MB

english, 2019

46

[Society of Petroleum Engineers SPE Norway Subsurface Conference - Virtual (2020-11-02)] SPE Norway Subsurface Conference - Accounting for Model Errors of Rock Physics Models in 4D Seismic History Matching Problems: A Perspective of Machine Learning

Luo, Xiaodong, Lorentzen, Rolf, Bhakta, Tuhin

File:

PDF, 2.03 MB

47

[Society of Petroleum Engineers SPE Norway Subsurface Conference - Virtual (2020-11-02)] SPE Norway Subsurface Conference - Optimizing Well Economic Limits Using Ensemble-Based Optimization on Olympus Field

Chang, Yuqing, Nffivdal, Geir, Lorentzen, Rolf Johan

File:

PDF, 908 KB