Leiv Jacob Gelius

Asgedom E.G., Leiv-J. Gelius, Austeng, A., Holm, S. & Tygel, M., 2011. Time-reversal multiple signal classification in case of noise: A phase-coherent approach. J. Acoust. Soc. Am. 130, 2024-2034.

Asgedom, E., Leiv-J. Gelius & Tygel, M., 2011. Higher- resolution determination of zero-offset common-reflection surface (CRS) stack parameters. International Journal of Geophysics. doi: 10.1155/2011/819831

Solberg, A. & Leiv-J. Gelius, 2011. New texture attributes from local 2D Fourier spectra. Extended Abstract. 81st SEG meeting, San Antonio, Texas, USA.

Orji, O.C., Sollner W. & Leiv-J. Gelius, 2011. Imaging time-varying sea surface using dual sensor data. Extended Abstract. 81st SEG meeting, San Antonio, Texas, USA.

Asgedom, E., Leiv-J. Gelius & Tygel M., 2011. A new approach to post-stack diffraction separation. Extended Abstract. 81st SEG meeting, San Antonio, Texas, USA.

Asgedom, E.G., Leiv-J. Gelius & Tygel, M., 2011. On separation of reflections and diffractions using a CRS/MUSIC approach. Extended Abstract, 73rd EAGE meeting, Vienna, Austria.

Solberg, A.S., Berthelot, A., & Leiv-J. Gelius, 2011. Gabor Filters for Segmentation of Salt Structures. Extended Abstract, 73rd EAGE meeting, Vienna, Austria.

Berthelot, A., Solberg, A.S., Morisbak, E. & Leiv-J. Gelius, 2011. Salt diapirs without well defined boundaries - a feasibility study of semi-automatic detection. Geophysical Prospecting online, doi: 10.1111/j.1365-2478.2011.00950.x

Asgedom, E.G., Leiv-J. Gelius & Tygel, M., 2011. Diffraction separation using the CRS technique: A field data application. Extended Abstract, 12th International Congress of The Brazilian Geophysical Society, Rio de Janeiro, Brazil.

Orji, O., Söllner, W. & Leiv-J. Gelius, 2010. Imaging the sea surface using a dual-sensor towed streamer.Geophys. 75, V111-118. doi: 10.1190/1.3496439

Leiv-J. Gelius & Asgedom, E., 2010. Diffraction-limited imaging and beyond - the concept of super resolution. Geophysical Prospecting, online. doi: 10.1111/j.1365-2478.2010.00928.x

Wang, Z. & Leiv-J. Gelius, 2010. Electric and elastic properties of rock samples: a unified measurement approach. Petroleum Geoscience 16, 171-183.

Wang, Z., Leiv-J. Gelius & Kong F.N., 2009. Simultaneous core sample measurements of electric properties and resistivity at reservoir conditions employing a modified triaxial cell - a feasibility study. Geophysical Prospecting (online), doi: 10.1111/j.1365-2478.2009.00792.x

Leiv-J. Gelius & Wang, Z., 2008. Modelling production caused changes in conductivity for a siliciclastic reservoir: a differential effective medium approach. Geophysical Prospecting 56, 677-691.

Leiv-J. Gelius, 2007. Electromagnetic scattering approximations revisited. Progress In Electromagnetic Research, PIER 76, 75-94.

Wang, Z. & Leiv-J. Gelius, 2007. Modeling of Seabed Logging Data for a Sand-shale Reservoir. Progress in Electromagnetic Research Online, Vol 3, No 2, 236-240.

Leiv-J. Gelius, 2006. Multi-component Processing of Sea Bed Logging Data. Progress in Electromagnetic Research ONLINE, Vol 2, No 6, 589-593.

Leiv-J. Gelius, 2006. Modeling the Response of a Seafloor Antenna in the Limits of Low Frequency and Shallow Water. Progress in Electromagnetic Research ONLINE, Vol 2, No 6, 2006, 580-584.

Lecomte, I., Hamran, S.-E. & Leiv-J. Gelius, 2005. Improving Kirchhoff migration with repeated local plane-wave imaging? A SAR-inspired signal-processing approach, Geophysical Prospecting 53, 767-785.

• Asgedom, Endrias Getachew; Gelius, Leiv-J.; Austeng, Andreas; Holm, Sverre & Tygel, Martin (2011). Time-reversal multiple signal classification in case of noise: A phase-coherent approach.. Journal of Acoustical Society of America.  ISSN 0001-4966.  130(4), s 2024- 2034
• Asgedom, Endrias Getachew; Gelius, Leiv-J. & Tygel, Martin (2011). Higher-resolution determination of zero-offset common-reflection surface (CRS) stack parameters.. International Journal of Geophysics.  ISSN 1687-885X. . doi: 10.1155/2011/819831
• Berthelot, Angélique; Solberg, Anne H S; Jarsve, Erlend Morisbak & Gelius, Leiv-J. (2011). Salt diapirs without well defined boundaries - a feasibility study of semi-automatic detection.. Geophysical Prospecting.  ISSN 0016-8025.  59, s 682- 696 . doi: 10.1111/j.1365-2478.2011.00950.x
• Gelius, Leiv-J. & Asgedom, Endrias Getachew (2011). Diffraction-limited imaging and beyond - the concept of super resolution. Geophysical Prospecting.  ISSN 0016-8025.  59(3), s 400- 421 . doi: 10.1111/j.1365-2478.2010.00928.x
• Solberg, Anne H S; Berthelot, Angélique & Gelius, Leiv-J. (2011). Gabor Filters for Segmentation of Salt Structures, In  Extended Abstracts DVD of the 73rd EAGE Conference & Exhibition incorporating SPE EUROPEC.  EAGE Publications.  ISBN 978-90-73834-12-5.  Seismic interpretation: Tools and methods.
• Solberg, Anne H S & Gelius, Leiv-J. (2011). New texture attributes from local 2D Fourier spectra. Extended Abstract., In Klaas Koster (ed.),  Society of Exploration Geophysicists International Exposition and 81st Annual Meeting 2011 (SEG San Antonio 2011).  Curran Associates, Inc..  ISBN 9781618391841.  INF P1.  s 1165 - 1169
• Gelius, Leiv-J. & Asgedom, Endrias Getachew (2010). Diffraction-limited imaging and beyond - the concept of super resolution . Geophysical Prospecting.  ISSN 0016-8025. . doi: 10.1111/j.1365-2478.2010.00928.x
• Orji, Okwundili Chuks; Sollner, Walter & Gelius, Leiv-J. (2010). Imaging the sea surface using a dual-sensor towed streamer. Geophysics.  ISSN 0016-8033.  75(6), s V111- V118 . doi: 10.1190/1.3496439
• Wang, Zhong & Gelius, Leiv-J. (2010). Electric and elastic properties of rock samples: a unified measurement approach. Petroleum Geoscience.  ISSN 1354-0793.  16(2), s 171- 183 . doi: 10.1144/1354-079309-013
• Berthelot, Angelique; Gelius, Leiv-J. & Solberg, Anne H S (2009). Use of seismic attributes in auto-tracking of salt structures - A feasibility study, In Toru Mogi (ed.),  The 9th SEGJ International Symposium Imaging and Interpretation - Science and Technology for Sustainable Development -.  Society of Exploration Geophysicists of Japan (SEGJ).  ISBN 978-4-938493-06-6.  Paper 47.
• Wang, Zhong; Gelius, Leiv-J. & Kong, F.N. (2009). Simultaneous core sample measurements of elastic properties and resistivity at reservoir conditions employing a modified triaxial cell - a feasibility study. Geophysical Prospecting.  ISSN 0016-8025.  57(6), s 1009- 1026 . doi: 10.1111/j.1365-2478.2009.00792.x
• Gelius, Leiv-J. & Wang, Zhong (2008). Modelling production caused changes in conductivity for a siliciclastic reservoir: a differential effective medium approach. Geophysical Prospecting.  ISSN 0016-8025.  56, s 677- 691 . doi: 10.1111/j.1365-2478.2008.00720.x
• Gelius, Leiv-J. (2007). Electromagnetic scattering approximations revisited. Progress in Electromagnetics Research - PIER.  ISSN 1070-4698.  76, s 75- 94
• Wang, Zhong & Gelius, Leiv-J. (2007). Modeling of Seabed Logging Data for a Sand-shale Reservoir. PIERS Online.  ISSN 1931-7360.  3(2), s 236- 240
• Gelius, Leiv-J. (2006). Modeling the Response of a Seafloor Antenna in the Limits of Low Frequency and Shallow Water. PIERS Online.  ISSN 1931-7360.  2(6), s 580- 584
• Gelius, Leiv-J. (2006). Multi-component Processing of Sea Bed Logging Data.. PIERS Online.  ISSN 1931-7360.  2(6), s 589- 593
• Lecomte, Isabelle; Hamran, Svein-Erik & Gelius, Leiv-J. (2005). Improving Kirchhoff migration with repeated local plane-wave imaging? A SAR-inspired signal-processing approach. Geophysical Prospecting.  ISSN 0016-8025.  53, s 767- 785
• Laurain, Renaud; Gelius, Leiv-J.; Vinje, Vetle & Lecomte, Isabelle (2004). A review of 3D illumination studies. Journal of Seismic Exploration.  ISSN 0963-0651.  13, s 17- 37
• Tabti, Hocine; Gelius, Leiv-J. & Hellmann, Thomas (2004). Fresnel aperture prestack depth migration. First Break.  ISSN 0263-5046.  22, s 39- 46
• Hamran, Svein-Erik; Lecomte, I. & Gelius, Leiv-J. (2003). Local Plane-Wave Imaging of GPR Data. Journal of Environmental & Engineering Geophysics.  ISSN 1083-1363.  8, s 115- 121
• Gelius, Leiv-J.; Lecomte, I. & Tabti, H. (2002). Analysis of the resolution function in seismic prestack depth imaging. Geophysical Prospecting.  ISSN 0016-8025.  50, s 505- 515
• Gelius, Leiv-J. & Westerdahl, H. (2002). Tunnel seismics - prediction of rock conditions ahead. European journal of environmental and engineering geophysics.  ISSN 1359-8155.  7, s 167- 183
• Tabti, Hocine; Gelius, Leiv-J. & Lecomte, Isabelle (2001). Discussion of J. Chen and G.T. Schuster's paper: Resolution Limits of migrated images.. Geophysics.  ISSN 0016-8033.  66
• Gelius, Leiv-J. & Lecomte, Isabelle (2000). The resolution function in linearized Born and Kirchhoff inversion., In  Lecture Notes in Earth Science: Methods and Applications of Inversion..  Springer Publishing Company.  ISBN 9783540659167.  Kapitel.
• Gelius, Leiv-J. (1997). Rock-quality control of underwater crossings based on diffraction tomographic processing of subsea transmission data.. European journal of environmental and engineering geophysics.  ISSN 1359-8155.  2
• Gelius, Leiv-J. & Westerdahl, Harald (1997). Seismic noise modeling.. Journal of Seismic Exploration.  ISSN 0963-0651.  6, s 351- 366
• Gelius, Leiv-J. (1996). An introduction to trigonometric smoothing.. Journal of Seismic Exploration.  ISSN 0963-0651.  5, s 291- 301
• Gelius, Leiv-J. (1996). EM target location.. Geophysical Prospecting.  ISSN 0016-8025.  44, s 479- 494
• Iversen, Einar; Vinje, Vetle & Gelius, Leiv-J. (1996). Raytracing in a smooth velocity model.. Journal of Seismic Exploration.  ISSN 0963-0651.  5
• Gelius, Leiv-J. (1995). A sample of controlled experiments in diffraction tomography.. Geophysical Prospecting.  ISSN 0016-8025.  43, s 31- 50
• Gelius, Leiv-J. (1995). Fluid leakage from a buried steel drum - a controlled field experiment in environmental tomography., In  Process tomography 1995. Implementation for industrial proceses..  University of Manchester Institute of Science and Technology (UMIST).  ISBN 0952316528.  Kapitel.
• Gelius, Leiv-J. (1995). Generalized acoustic diffraction tomography. Geophysical Prospecting.  ISSN 0016-8025.  43, s 3- 29
• Gelius, Leiv-J. (1995). Limited view diffraction tomography in a non-uniform background.. Geophysics.  ISSN 0016-8033.  60, s 580- 588
• Sponheim, Nils; Gelius, Leiv-J.; Johansen, Ingvild & Stamnes, Jakob J. (1994). Ultrasonic tomography of biological tissue.. Ultrasonic imaging (Print).  ISSN 0161-7346.  16, s 19- 32
• Stamnes, Jakob J.; Gelius, Leiv-J.; Johansen, Ingvild & Sponheim, Nils (1992). Diffraction tomography applications in seismic and medicine., In  Inverse Problems in Scattering and Imaging.  Adam Hilger.  ISBN 0750301430.  Kapitel.
• Gelius, Leiv-J.; Johansen, Ingvild; Sponheim, Nils & Stamnes, Jakob J. (1991). A generalized diffraction tomography algorithm.. Journal of Acoustical Society of America.  ISSN 0001-4966.  89, s 523- 528
• Gelius, Leiv-J.; Stamnes, Jakob J. & Heier, Halvor (1991). Pulse distortion in caustic regions.. Geophysical Prospecting.  ISSN 0016-8025.  39, s 51- 59
• Johansen, Ingvild; Gelius, Leiv-J.; Spjelkavik, Bjørn; Sponheim, Nils & Stamnes, Jakob J. (1991). Exact and approximate scattering data for testing the filtered backpropagation (FBP) and hybrid FBP reconstruction algorithm., In  Acoustical Imaging 19..  Plenum Publishing.  ISBN 978-0-306-44198-1.  Kapitel.
• Sponheim, Nils; Gelius, Leiv-J.; Johansen, Ingvild & Stamnes, Jakob J. (1991). Quantitative results in ultrasonic tomography for large objects using line sources and curved detector arrays.. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.  ISSN 0885-3010.  38, s 370- 379
• Stamnes, Jakob J. & Gelius, Leiv-J. (1991). Fast and Accurate Computations of Fields Near Caustics and Cusps.. Radio Science.  ISSN 0048-6604.  26, s 229- 235
• Gelius, Leiv-J. & Stamnes, Jakob J. (1990). Diffraction tomography imaging - potentials and problems., In  Scattering in Volumes and Surfaces..  Elsevier.  ISBN 0-444-88529-3.  Kapitel.
• Pedersen, Hans Magne; Gelius, Leiv-J. & Stamnes, Jakob J. (1989). 3D seismic modelling of edge diffractions.. Geophysical Prospecting.  ISSN 0016-8025.  37, s 639- 646
• Pedersen, Hans Magne; Gelius, Leiv-J. & Nareid, H (1988). Control of wire grids by diffraction measurements., In H.A. Ferwerda (ed.),  Scattering and diffractions..  Proc. SPIE.  ISBN 0819400645.  Kapitel.
• Gelius, Leiv-J. (1987). Inverse Q-filtering. A Spectral Balancing Technique.. Geophysical Prospecting.  ISSN 0016-8025.  35, s 656- 668
• Gelius, Leiv-J. & Stamnes, Jakob J. (1987). Computer Experiments in Acoustical Diffraction Tomography., In E.R. Pike (ed.),  Inverse Problems in Optics..  Proc. SPIE Int. Soc. Opt. Eng..  ISBN 9780892528431.  Kapitel.
• Kanestrøm, Reidar; Gelius, Leiv-J. & Møller-Holst, Johan (1985). Experience with a Long Streamer in Seismic Exploration., In  Acoustical Imaging 14.  Plenum Publishing.  ISBN 978-0-306-42094-8.  Kapitel.

View all works in Cristin

• Gelius, Leiv-J. & Johansen, Tor Arne (2010). Petroleum Geophysics. UniGEO as.  ISBN 978-82-93099-00-0.  660 s.

View all works in Cristin

• Asgedom, Endrias Getachew; Gelius, Leiv-J. & Tygel, Martin (2011). A new approach to post-stack diffraction separation..
• Asgedom, Endrias Getachew; Gelius, Leiv-J. & Tygel, Martin (2011). Diffraction separation using the CRS technique: A field data application..
• Asgedom, Endrias Getachew; Gelius, Leiv-J. & Tygel, Martin (2011). On separation of reflections and diffractions using a CRS/MUSIC approach..
• Orji, Okwundili Chuks; Sollner, Walter & Gelius, Leiv-J. (2011). Imaging time-varying sea surface using dual sensor data..
• Solberg, Anne Schistad; Berthelot, Angélique & Gelius, Leiv-J. (2011). Gabor Filters for Segmentation of Salt Structures..
• Solberg, Anne Schistad & Gelius, Leiv-J. (2011). New texture attributes from local 2D Fourier spectra..
• Asgedom, Endrias Getachew & Gelius, Leiv-J. (2010). Multi-frequency phase coherent super-resolution imaging.
• Berthelot, Angèlique; Solberg, Anne H S & Gelius, Leiv-J. (2010). Attributes designed for detection of salt diapirs without well defined boundaries.
• Gelius, Leiv-J. (2010). Diffraction-limited imaging and beyond.
• Wang, Zhong & Gelius, Leiv-J. (2010). Simultaneous measurements of electric and elastic properties of rock samples.
• Gelius, Leiv-J. (2009). 3-D modeling of mCSEM data employing various electromagnetic scattering approximations.
• Gelius, Leiv-J. (2009). A Simple Analysis of Diffraction-limited Imaging and Super-resolution.
• Gelius, Leiv-J. (2009). Time-reversal and super-resolution in case of two transceiver arrays: generalized DORT.
• Orji, Okwundili Chuks; Sollner, Walter & Gelius, Leiv-J. (2009). Imaging the seasurface using a dual-sensor towed streamer.
• Zheng, Haishan & Gelius, Leiv-J. (2009). Analyzing low-frequency seismic noise employing seismic interferometry (SI) and time-reversal modeling (TRM) - a feasibility study.
• Wang, Zhong; Gelius, Leiv-J. & Kong, F.N. (2008). A sensitivity analysis of the sea bed logging technique with respect to reservoir heterogeneities.
• Gelius, Leiv-J. (2007). A rock-physics approach to Sea Bed Logging (SBL) modelling/inversion.
• Wang, Zhong; Gelius, Leiv-J. & Kong, F.N. (2007). Influence of Temperature on the Seabed-Logging Response of a Sand-shale Reservoir.
• Jensen, Erling Hugo; Johansen, Tor Arne & Gelius, Leiv-J. (2006). Læreverk og læringssystem i ett. En geovitenskapelig læringsplattform. UniGEM.. Forum for fjernundervisning.  ISSN 1503-7770.  1
• Gelius, Leiv-J. (2003). Introduction to seismic processing.
• Gelius, Leiv-J. (2003). Seismic Signal Analysis.
• Sjøberg, Thomas A.; Gelius, Leiv-J. & Lecomte, I. (2003). 2-D deconvolution of seismic image blur.
• Gelius, Leiv-J.; Lecomte, I. & Hamran, Svein-Erik (2002). The concept of Local Parabolic-Wave Imaging (LpI)in PSDM.
• Hamran, Svein-Erik; Lecomte, I. & Gelius, Leiv-J. (2002). GPR processing using local Plane-wave Imaging.
• Lecomte, I.; Gelius, Leiv-J. & Hamran, Svein-Erik (2002). Local imaging approach and applications.
• Tabti, H. & Gelius, Leiv-J. (2002). Fresnel Aperture PSDM.
• Lecomte, I.; Hamran, Svein-Erik; Tabti, Hocine & Gelius, Leiv-J. (2001). New Insights in migration Through analogies between Generalized Diffraction Tomography and Synthetic Aperture Radar..
• Gelius, Leiv-J. & Lecomte, Isabelle (1999). The Resolution Function in Prestack Depth Migration..
• Gelius, Leiv-J. & Lecomte, Isabelle (1998). The resolution function in linearized Born and Kirchhoff Inversion..
• Kong, F.N.; Westerdahl, H. & Gelius, Leiv-J. (1998). A very wide bandwidth step frequency GPR for testing concrete rebars..
• Lecomte, Isabelle & Gelius, Leiv-J. (1998). Have a look at the resolution function of prestack depth migration for any model, survey and wavefields..
• Gelius, Leiv-J.; Westerdahl, Harald & Kong, F.N. (1997). Modelling and imaging within the diffraction limit with application in engineering geophysics..
• Gelius, Leiv-J. & Johansen, Ingvild (1995). Target location based on crosshole radar measurements..
• Johansen, Ingvild & Gelius, Leiv-J. (1995). Maximum likelihood object location employing magnetometer and radar surface data..
• Stamnes, Jakob J.; Wedberg, Torolf C. & Gelius, Leiv-J. (1995). Tomographic Reconstruction From Real Data..
• Gelius, Leiv-J. (1992). Acoustical imaging of tomographic measurements in a complex model..
• Gelius, Leiv-J. (1992). Asymptotic diffraction theory with applications in tomography..
• Gelius, Leiv-J. & Stamnes, Jakob J. (1991). Iterative geophysical diffraction tomography..
• Sponheim, Nils; Johansen, Ingvild; Stamnes, Jakob J. & Gelius, Leiv-J. (1991). Ultrasonic tomography for breastcancer scanning..
• Gelius, Leiv-J. & Stamnes, Jakob J. (1990). A controlled field experiment in diffraction tomography..
• Gelius, Leiv-J. & Stamnes, Jakob J. (1989). Comparison between x-ray tomography and diffraction tomography..
• Stamnes, Jakob J. & Gelius, Leiv-J. (1989). Rays, catastrophes and uniform asymptotics..
• Gelius, Leiv-J. & Stamnes, Jakob J. (1988). Diffraction tomography imaging - a critical evaluation..
• Gelius, Leiv-J. & Stamnes, Jakob J. (1988). Diffraction tomography imaging using VSP and WTW data..
• Iversen, Einar; Gelius, Leiv-J.; Gjøystdal, Haavar; Stamnes, Jakob J. & Pedersen, Hans Magne (1988). Seimsic diffraction modelling of 3D edges..
• Gelius, Leiv-J.; Iversen, Einar; Gjøystdal, Haavar; Stamnes, Jakob J. & Pedersen, Hans Magne (1987). Practical aspects of modelling of seismic diffractions from edges in 3D geological structures..
• Gelius, Leiv-J. & Stamnes, Jakob J. (1987). Computer experiments in acoustical diffraction tomography..
• Pedersen, Hans Magne; Gelius, Leiv-J. & Iversen, Einar (1987). Ray interpolation for fast modelling of seismic response in complex geological models..
• Stamnes, Jakob J.; Gelius, Leiv-J. & Pedersen, Hans Magne (1987). Fast and accurate computation of fields near caustics and cusps..
• Gelius, Leiv-J.; Heier, Halvor; Løvhaugen, Odd; Pedersen, Hans Magne & Stamnes, Jakob J. (1986). Pulse distortion in caustic regions..
• Pedersen, Hans Magne; Gelius, Leiv-J. & Skytt, Vibeke (1986). Dynamic raytracing through caustics..
• Stamnes, Jakob J.; Gelius, Leiv-J. & Scholten, Bart (1986). Exact solutions and Kirchhoff solutions for diffraction by a half-plane..
• Gelius, Leiv-J.; Kullerud, A & Rafto, J.E. (1984). Automatic velocity analysis based on refracted data..

View all works in Cristin