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Proceedings Papers

Decoupling of changes in pressure-saturation and porosity fields from time-lapse seismic data using an ensemble based method for a compacting chalk reservoir

Tuhin Bhakta, Evgeny Tolstukhin, Carlos Pacheco, Xiaodong Luo, Geir Nævdal
Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3423752
https://doi.org/10.1190/segam2020-3423752.1
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View Paper titled, Decoupling of changes in pressure-saturation and porosity fields from time-lapse seismic data using an ensemble based method for a compacting chalk reservoir
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Proceedings Papers

Homotopy method for seismic modeling in strongly scattering acoustic media with density variation

Kui Xiang, Morten Jakobsen, Kjersti Solberg Eikrem, Geir Nævdal
Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426347
https://doi.org/10.1190/segam2020-3426347.1
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View Paper titled, Homotopy method for seismic modeling in strongly scattering acoustic media with density variation
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Proceedings Papers

A target-oriented scheme for efficient inversion of time-lapse seismic waveform data

Xingguo Huang, Morten Jakobsen, Kjersti Solberg Eikrem, Geir Nævdal
Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2992008
https://doi.org/10.1190/segam2018-2992008.1
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View Paper titled, A target-oriented scheme for efficient inversion of time-lapse seismic waveform data
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Journal Articles

Correlation-Based Adaptive Localization With Applications to Ensemble-Based 4D-Seismic History Matching

Xiaodong Luo, Tuhin Bhakta, Geir Nævdal
Journal: SPE Journal
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 23 (02): 396–427.
Paper Number: SPE-185936-PA
https://doi.org/10.2118/185936-PA
Published: 08 January 2018
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View article titled, Correlation-Based Adaptive Localization With Applications to Ensemble-Based 4D-Seismic History Matching
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Proceedings Papers

Estimation of pressure-saturation and porosity fields from seismic acoustic impedance data using an ensemble-based method

Tuhin Bhakta, Xiaodong Luo, Rolf Lorentzen, Geir Nævdal
Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17699721
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View Paper titled, Estimation of pressure-saturation and porosity fields from seismic acoustic impedance data using an ensemble-based method
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Journal Articles

An Ensemble 4D-Seismic History-Matching Framework With Sparse Representation Based On Wavelet Multiresolution Analysis

Xiaodong Luo, Tuhin Bhakta, Morten Jakobsen, Geir Nævdal
Journal: SPE Journal
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 22 (03): 985–1010.
Paper Number: SPE-180025-PA
https://doi.org/10.2118/180025-PA
Published: 10 November 2016
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View article titled, An Ensemble 4D-Seismic History-Matching Framework With Sparse Representation Based On Wavelet Multiresolution Analysis
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Proceedings Papers

Ensemble based 4D seismic history matching using a sparse representation of AVA data

Tuhin Bhakta, Xiaodong Luo, Geir Nævdal
Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13943719
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View Paper titled, Ensemble based 4D seismic history matching using a sparse representation of AVA data
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Journal Articles

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

Xiaodong Luo, Andreas S. Stordal, Rolf J. Lorentzen, Geir Nævdal
Journal: SPE Journal
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 20 (05): 962–982.
Paper Number: SPE-176023-PA
https://doi.org/10.2118/176023-PA
Published: 20 October 2015
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View article titled, Iterative Ensemble Smoother as an Approximate Solution to a Regularized Minimum-Average-Cost Problem: Theory and Applications
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Journal Articles

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

Rolf J. Lorentzen, Andreas S. Stordal, Geir Nævdal, Hans A. Karlsen, Hans J. Skaug
Journal: SPE Journal
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 19 (01): 172–180.
Paper Number: SPE-165582-PA
https://doi.org/10.2118/165582-PA
Published: 25 June 2013
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View article titled, Estimation of Production Rates With Transient Well-Flow Modeling and the Auxiliary Particle Filter
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Journal Articles

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

Rolf J. Lorentzen, Geir Nævdal, Ali Shafieirad
Journal: SPE Journal
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 18 (01): 146–158.
Paper Number: SPE-143031-PA
https://doi.org/10.2118/143031-PA
Published: 01 February 2013
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View article titled, Estimating Facies Fields by Use of the Ensemble Kalman Filter and Distance Functions—Applied to Shallow-Marine Environments
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Proceedings Papers

Refined Adaptive Gaussian Mixture Filter - Application on a Real Field Case

Randi Valestrand, Geir Nævdal, Ali Shafieirad, Andreas S. Stordal, Laura Dovera
Paper presented at the SPE Europec/EAGE Annual Conference, June 4–7, 2012
Paper Number: SPE-154479-MS
https://doi.org/10.2118/154479-MS
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View Paper titled, Refined Adaptive Gaussian Mixture Filter - Application on a Real Field Case
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Journal Articles

History Matching Channelized Reservoirs Using the Ensemble Kalman Filter

Rolf J. Lorentzen, Kristin M. Flornes, Geir Nævdal
Journal: SPE Journal
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 17 (01): 137–151.
Paper Number: SPE-143188-PA
https://doi.org/10.2118/143188-PA
Published: 03 August 2011
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Proceedings Papers

Estimating Facies Felds using the Ensemble Kalman Filter and Distance Functions–Applied to Shallow-Marine Environments

Rolf J. Lorentzen, Geir Nævdal, Ali Shafieirad
Paper presented at the SPE EUROPEC/EAGE Annual Conference and Exhibition, May 23–26, 2011
Paper Number: SPE-143031-MS
https://doi.org/10.2118/143031-MS
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View Paper titled, Estimating Facies Felds using the Ensemble Kalman Filter and Distance Functions–Applied to Shallow-Marine Environments
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Journal Articles

Quantifying Monte Carlo Uncertainty in the Ensemble Kalman Filter

Kristian Thulin, Geir Nævdal, Hans Julius Skaug, Sigurd Ivar Aanonsen
Journal: SPE Journal
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 16 (01): 172–182.
Paper Number: SPE-123611-PA
https://doi.org/10.2118/123611-PA
Published: 27 October 2010
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View article titled, Quantifying Monte Carlo Uncertainty in the Ensemble Kalman Filter
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Proceedings Papers

Soft Multiphase Flow Metering for Accurate Production Allocation

Rolf J. Lorentzen, Geir Nævdal
Paper presented at the SPE Russian Oil and Gas Conference and Exhibition, October 26–28, 2010
Paper Number: SPE-136026-MS
https://doi.org/10.2118/136026-MS
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View Paper titled, Soft Multiphase Flow Metering for Accurate Production Allocation
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Proceedings Papers

Selection of Decision Variables for Large-Scale Production Optimization Problems Applied to Brugge Field

Masoud Asadollahi, Geir Nævdal
Paper presented at the SPE Russian Oil and Gas Conference and Exhibition, October 26–28, 2010
Paper Number: SPE-136378-MS
https://doi.org/10.2118/136378-MS
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View Paper titled, Selection of Decision Variables for Large-Scale Production Optimization Problems Applied to Brugge Field
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Proceedings Papers

Rate Allocation: Combining Transient Well Flow Modeling and Data Assimilation

Rolf J. Lorentzen, Ove Saevareid, Geir Naevdal
Paper presented at the SPE Annual Technical Conference and Exhibition, September 19–22, 2010
Paper Number: SPE-135073-MS
https://doi.org/10.2118/135073-MS
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View Paper titled, Rate Allocation: Combining Transient Well Flow Modeling and Data Assimilation
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Proceedings Papers

Benchmark Study of Ensemble Kalman Filter Methodology: History Matching and Uncertainty Quantification for a Deep-Water Oil Reservoir

Alberto Cominelli, Laura Dovera, Silvia Vimercati, Geir Naevdal
Paper presented at the International Petroleum Technology Conference, December 7–9, 2009
Paper Number: IPTC-13748-MS
https://doi.org/10.2523/IPTC-13748-MS
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View Paper titled, Benchmark Study of Ensemble Kalman Filter Methodology: History Matching and Uncertainty Quantification for a Deep-Water Oil Reservoir
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Proceedings Papers

Revisiting Brugge case study using a Hierarchical Ensemble Kalman filter

Brice Vallhs, Geir Naevdal
Paper presented at the International Petroleum Technology Conference, December 7–9, 2009
Paper Number: IPTC-14074-MS
https://doi.org/10.2523/IPTC-14074-MS
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View Paper titled, Revisiting Brugge case study using a Hierarchical Ensemble Kalman filter
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Proceedings Papers

A Workflow for Efficient Initialization of Local-Search Iterative Methods for Waterflooding Optimization

Masoud Asadollahi, Geir Naevdal, Renato Markovinovic, Ali Shafieirad
Paper presented at the International Petroleum Technology Conference, December 7–9, 2009
Paper Number: IPTC-13994-MS
https://doi.org/10.2523/IPTC-13994-MS
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View Paper titled, A Workflow for Efficient Initialization of Local-Search Iterative Methods for Waterflooding Optimization
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