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Technical papers and industry articles

Our clients and EMGS employees have published many technical papers since 2002. Here is a selection.
Year Title Author
2011 Value creation using electromagnetic imaging David Ridyard, EMGS and Jonny Hesthammer, Rocksource
2011 The future of Marine CSEM (Copyright First Break) Roar Bekker and Jens Danielsen
2011 Sub-basalt Imaging Using Broadside CSEM Jan Petter Morten, Stein Fanavoll, Frida.M. Mrope & Anh Kiet Nguyen
2011 Low Noise Ag/AgCl Electric Field Sensor System for Marine CSEM and MT Applications Geir B. Havsgård, Hans R. Jensen, Alexander Kurrasch (EMGS), Howard Jones, Paul Austin, Andrew Thompson (Ultra Electronics PMES)
2011 Unlocking the Secrets of the Barents Sea Halfdan Carstens, GEO ExPro
2011 3D reservoir characterization of a North Sea oil field using quantitative seismic & CSEM interpretation Jan P. Morten and Friedrich Roth, EMGS, David Timko and Constantin Pacurar, Fugro-Jason, Anh K. Nguyen and Per A. Olsen, Statoil
2011 Anisotropic CSEM Inversion near the “Tiger” well in AC 818, Gulf of Mexico Cam Kanhalangsy, Nick Golubev, Jurgen Johann Zach, Daniel Baltar, EMGS Americas
2010 CSEM performance in light of well results (copyright SEG) Jonny Hesthammer, Aris Stefatos and Mikhail Boulaenko, Rocksource, Stein Fanavoll and Jens Danielsen, EMGS
2010 CSEM Survey over the Frigg Gas Field, North Sea Mark Hamilton, EMGS, Geir Mikkelsen, Total E&P Norge, Romain Poujardieu, EMGS and A. Price, Total E&P
2010 Shallow Water CSEM Using a Surface-towed Source Daniil Shantsev, Friedrich Roth, ClaudiaTwarz, Asbjørn Frisvoll and Anh Kiet Nguyen
2010 The performance of CSEM as a de-risking tool in oil and gas exploration (copyright SEG) Jonny Hesthammer and Aristofanis Stefatos, Rocksource ASA, Stein Fanavoll and Jens Danielsen, EMGS ASA
2010 False negatives and positives in the interpretation of EM data (copyright SEG) Stein Fanavoll and Jens Danielsen, EMGS ASA, Jonny Hesthammer and Aris Stefatos, Rocksource ASA
2010 3D CSEM over Frigg – dealing with cultural noise (copyright SEG) Antony Price, Total CSTJF, France, Geir Mikkelsen, Total Norge and Mark Hamilton, EMGS
2010 Full-azimuth, anisotropic 3D EM inversion applied to a low-resistivity pay reservoir with well control (copyright SEG) D. Crider and M. Scherrer, Focus Exloration LLC, T. Pham, Jürgen J. Zach and Michael A. Frenkel, EMGS Americas
2010 Shallow water 3D CSEM: A case study from Malaysia (copyright SEG) Håkon Toralv Pedersen, EMGS, M. Akmal Affendi B. Adnan and Azani B. A. Manaf, Petronas
2010 A practical example why anisotropy matters - A CSEM case study from South East Asia (copyright SEG) S. A. Mohamad, L. Lorenz, L. T. Hoong and T. K. Wei, EMGS, S. K. Chandola, N. Saadah and F. Nazihah, PETRONAS Carigali
2010 Controlled source electromagnetic technology and hydrocarbon exploration effiency (Copyright First Break) Stein Fanavoll, EMGS, Jonny Hesthammer, Rocksource, Jens Danielsen, EMGS and Aris Stefatos, Rocksource
2010 High-order finite-difference simulations of marine CSEM surveys using a correspondence principle for wave and diffusion fields Rune Mittet
2010 How seabed logging is reducing risk today and creating opportunities tomorrow David Ridyard
2010 Fast-track Marine CSEM Processing and 3D Inversion Jan Petter Morten and Astrid Kornberg Bjørke
2010 Hydrocarbon reservoir thickness resolution in 3D CSEM anisotropic inversion (copyright SEG) Jan Petter Morten, Astrid Kornberg Bjørke and Anh Kiet Nguyen
2009 Exploration case studies in mature Gulf of Mexico basins using 3D marine CSEM (copyright SEG) Honglin Yuan, Tra Pham, Jürgen J. Zach, Michael A. Frenkel and David Ridyard
2009 Marine CSEM time-lapse repeatability for hydrocarbon field monitoring (copyright SEG) Jürgen J. Zach , Michael A. Frenkel, David Ridyard , J. Hincapie and Benjamin Dubois
2009 Incorporating seismic horizons in inversion of CSEM data (copyright SEG) Kristian Rymann Hansen and Rune Mittet
2009 The role of EM rock physics and seismic data in integrated 3D CSEM data analysis (copyright SEG) I. Brevik, StatoilHydro, Pål T. Gabrielsen, Vestfonna and Jan Petter Morten, EMGS
2009 Enhanced subsurface response for marine CSEM surveying (copyright SEG) Frank A. Maaø and Anh Kiet Nguyen
2009 A Modeling Study of Low-frequency CSEM in Shallow Water Michael A. Frenkel and Sofia Davydycheva
2009 EM anomaly detection under a high resistive, anisotropic overburden: Inversion study from the Nucula discovery, Barents Sea Anh Kiet Nguyen, Stein Fanavoll, Kristian Rymann Hansen, Jan Petter Morten and Raghava Tharimela
2009 Prospect de-risking using CSEM Joanne Suffert and Volker Ullrich, EMGS, and Marit Tørudbakken Jendal, RWE DEA Norge
2009 Detecting low-pay reservoirs in salt provinces using 3D inversion of marine CSEM Jürgen J. Zach, Michael A. Frenkel , Anne Marit Østvedt-Ghazi, Arun Kumar and Tra Pham
2009 Interpreting SBL data in complex resistivity regime; integration of advanced EM- techniques (copyright SEG) Lars Lorenz and Håkon Pedersen, EMGS, Muralikrishna Akella, Anil Tyagi, Pranaya Sangvai and Rabi Bastia, Reliance Industries Ltd
2009 Marine CSEM technology performance in hydrocarbon exploration - limitations or opportunities? Aristofanis Stefatos, Mikhail Boulaenko and Jonny Hesthammer, Rocksource
2009 3-D EM addresses exploration challenges Don Crider and Mike Scherrer, Focus Exploration and David Ridyard and Honglin Yuan, EMGS Americas
2009 Salt mapping using 3D-marine CSEM surveys Jürgen J. Zach, Michael A. Frenkel, Anne Marit Østvedt-Ghazi, Stuart Goldstein, Arun Kumar and Tra Pham
2009 3D Inversion-Based Interpretation of Marine CSEM Data Jürgen J. Zach and Michael A. Frenkel
2009 Marine CSEM methods for 3D hydrocarbon field mapping and monitoring Jürgen J. Zach, Michael A. Frenkel, Anne-Marit Østvedt-Ghazi, Patricia de Lugao and David Ridyard
2009 CSEM data uncertainty analysis for 3D inversion (copyright SEG) Jan Petter Morten, Astrid Kornberg Bjørke and Trude Støren
2009 Importance of Azimuth Data for 3D Inversion of Marine CSEM Scanning Data Jan Petter Morten, Astrid Kornberg Bjørke, Trude Støren, Eivind Coward, Stig Arne Karlsen and Friedrich Roth
2009 Casing effects in the sea-to-borehole electromagnetic method F. N. Kong , F. Roth, P. A. Olsen and S. O. Stalheim
2008 Seabed logging acquisition as a tool in exploration decision-making (copyright: SEG) J. Mohr, C. Guargena and S. Sorensen, Aker Exploration ASA, Ole Christensen and Bi Trah Lucien Tah, EMGS
2008 Shaping optimal transmitter waveforms for marine CSEM surveys (copyright: SEG) Rune Mittet and Tor Schaug-Pettersen
2008 How EM survey analysis validates current technology, processing and interpretation methodology Ståle Johansen, Kjetil Brauti, Stein Fanavoll, et.al
2008 CMP inversion and post-inversion modelling for marine CSEM data Rune Mittet, Ketil Brauti, Herry Maulana and Tor Atle Wicklund
2008 Normalized amplitude ratios for frequency-domain CSEM in very shallow water Rune Mittet
2008 Planning Time-lapse CSEM-surveys for Joint Seismic-EM Monitoring of Geological Carbon Dioxide Injection T. Norman, NTNU, H. Alnes, StatoilHydro, O. Christensen, J.J. Zach, EMGS, O. Eiken, StatoilHydro and E. Tjåland, NTNU
2008 Laws of Attraction Interview with J. Hesthammer, Rocksource, J. Christiansen, TGS-NOPEC, K. Feather, EMGS, A. Overton, OHM, et.al
2008 Integrated EM system boosts the search for hydrocarbons Ken Feather, EMGS
2008 Electromagnetic prospect scanning - seabed logging moves from risk reduction to value creation Bjørn Petter Lindom, Jan Erik Lie and David Ridyard
2008 On the Removal of MT Signals from SBL Data Sebastien de la Kethulle de Ryhove, Frank Maaø
2008 Data Preprocessning and Starting Model Preparation for 3D Inversion of Marine CSEM Surveys Jürgen J. Zach, Friedrich Roth and Honglin Yuan
2008 Gradient Calculation for 3D Inversion of CSEM Data Using a Fast Finite-difference Time-domain Modelling Code Trude Støren, Jurgen J. Zach and Frank A. Maaø
2007 Fast finite-difference time-domain modeling for marine-subsurface electromagnetic problems (copyright: SEG) Frank A. Maaø
2007 On the orientation and absolute phase of marine CSEM receivers Rune Mittet, Odd Marius Aakervik, Hans Roger Jensen, Svein Ellingsrud, EMGS and Alexey Stovas, NTNU
2007 Shaping optimal transmitter waveforms for marine CSEM surveys (copyright: SEG) Rune Mittet and Tor Schaug-Pettersen
2007 Effect of receiver density and azimuth data in grid modelling of seabed logging (copyright: SEG) Bjørn Petter Thrane, Edwin Meissner, Martin Panzner and Frank A. Maaø
2007 Inversion of marine CSEM data using up-down wavefield separation and simulated annealing (copyright: SEG) Friedrich Roth and Jürgen J. Zach
2007 The Luva Gas Field: Detailed Analyses Reveal Subtle Anomaly Halfdan Carstens, GEO ExPro
2007 Changing the exploration rule book with EMGS
2007 Seabed surveyors break new ground Andrew McBarnet, Asian Oil & Gas
2007 Seabed Logging – A Proven Tool for Offshore Exploration and Development David Ridyard, EMGS
2007 CMP inversion of marine CSEM data Rune Mittet, EMGS, H. Maulana, Murphy, Ketil Brauti, and Tor Arne Wicklund, EMGS
2007 Azimuth decomposition of seabed logging data Frank A. Maaø, EMGS, S. E. Johnstad, Hydro O&E, Pål T. Gabrielsen and Martin Panzner, EMGS
2007 Methane hydrates in CSEM surveys - analysis of a recent data example Jürgen J. Zach and Ketil Brauti
2007 Improving seabed logging sensitivity in shallow water through up-down separation Friedrich Roth and Frank A. Maaø
2007 The rapid adoption of Seabed Logging Interview with Ken Feather, EMGS
2007 Challenges in Shallow Water CSEM Surveying: A Case History from Southeast Asia (copyright: IPTC) S. K. Chandola, R. Karim, A. Mawarni, R. Ismail, N. Shahud, R. Rahman and P. Bernabe, PETRONAS Carigali and Ketil Brauti, EMGS
2007 Deep electromagnetic imaging Ken Feather, EMGS
2006 High-resistivity anomalies at Modgunn arch in the Norwegian Sea Anwar Bhuiyan, NTNU, Tor Atle Wicklund and Ståle Johansen, EMGS
2006 Decomposition of electromagnetic fields into upgoing and downgoing components Lasse Amundsen, Statoil, Lars Løseth, NTNU, Rune Mittet and Svein Ellingsrud, EMGS and Bjørn Ursin, NTNU
2006 Scanning moves seabed logging from risk reduction to opportunity creation David Ridyard, Tor Atle Wicklund and Bjørn Petter Lindhom
2006 Low-frequency electromagnetic fields in applied geophysics: waves or diffusion? Lars O. Løseth, Hans M. Pedersen and Bjørn Ursin, NTNU, Lasse Amundsen, Statoil Research Center and Svein Ellingsrud, EMGS
2006 Interpretation example of marine CSEM data Ståle E. Johansen and Tor Arne Wicklund, EMGS and Hans E. F. Amundsen, EPX
2006 Towards a new era Halfdan Carstens, GEO ExPro
2006 Experience is crucial to expanding CSEM use Dirk Smit and Paul R. Wood, Shell International Exploration and Production
2006 Seabed Logging wins industry vote
2006 Watching technologies emerge Rhonda Duey, E&P
2006 Finding oil and gas beneath the seabed
2006 - Det største siden 1920-tallet (Norwegian only) Morten J. Mellby, Kapital
2006 Sea of change Interview with David Ridyard, EMGS, David Monk, SEG and Eivind Berg, SINTEF
2006 Seabed Logging. It’s All about Finding Hydrocarbons Interview with David Ridyard
2005 Subsurface hydrocarbons detected by electromagnetic sounding S. E. Johansen, EMGS, H.E.F. Amundsen, EXP, T. Røsten, Statoil, S. Ellingsrud and T. Eidesmo, EMGS and A.H. Bhuyian, NTNU
2005 Depth migration of seabed logging data Rune Mittet, Frank A. Maaø , Odd Marius Aakervik and Svein Ellingsrud
2005 A two-step approach to depth migration of low frequency electromagnetic data (Copyright SEG) Rune Mittet, Frank A. Maaø, Odd Marius Aakervik and Svein Ellingsrud
2005 EM Seabed logging on the Troll field S.E. Johnstad, and B.A. Farrelly, Hydro and C. Ringstad, EMGS
2005 Seabed logging heads advances in long-offset electromagnetic surveying Terje Eidesmo, Svein Ellingsrud, Ståle E. Johansen and Rune Mittet
2004 Inversion of seabed-logging data acquired in shallow waters Rune Mittet, Lars Løseth and Svein Ellingsrud
2004 Norwegian Sea a seabed-logging case study Tor Arne Wicklund and Stein Fanavoll
2004 Remote characterisation of hydrocarbon-filled reservoirs at the Troll field by seabed logging B. Farrelly Norsk Hydro, C. Ringstad, EMGS, S.E. Johnstad, Norsk Hydro and S. Ellingsrud, EMGS
2004 Proving the concept Halfdan Carstens, GEO ExPro
2004 The same principe as in borehole logging Halfdan Carstens, GEO ExPro
2004 An exploration renaissance
2003 A seabed logging calibration survey over the Ormen Lange gas field T. Røsten, Statoil, S. Johnstad, Norsk Hydro, S. Ellingsrud, EMGS, H.E. Amundsen, EXP, S. Johansen, EMGS and I. Brevik, Statoil
2003 Innertier for elektromagnetisme (Norwegian only) Halfdan Carstens, GEO
2002 Remote sensing of hydrocarbon layers by seabed logging (SBL): Results from a cruise offshore Angola S. Ellingsrud, T. Eidesmo and S. Johansen, EMGS, M.C. Sinha and L.M. MacGregor, UK, and S. Constable, U.S
2002 Seabed logging (SBL), a new method for remote and direct identification of hydrocarbon filled layers in deepwater areas T. Eidesmo, S. Ellingsrud, L. M. MacGregor, S. Constable, M. C. Sinha, S. Johansen, F. N. Kong and H. Westerdahl
2002 Ny teknologi revolusjonerer oljeleting: Påviser hydrokarboner før boring (Norwegian only) Halfdan Carstens, GEO
2002 'Seabed Logging': A possible direct hydrocarbon indicator for deepsea prospects using EM energy F.N Kong and H. Westerdahl, NGI and S. Ellingsrud, T. Eidesmo and S. Johansen, EMGS
2002 Waves of Information Åse P. Thirud, Scandinavian Oil-Gas Magazine


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