Published Papers

Haveraaen, Magne, Helmer André Friis and Tor Arne Johansen (1999). Formal software engineering for computational modelling. Nordic Journal of Computing, 6, 241 - 270.

Jakobsen, Morten, and Tor Arne Johansen (1999). A test of ANNIE based on ultrasonic measurements on a shale. J. Seismic Explor., 8, 77 - 89.

Jakobsen, Morten, and Tor Arne Johansen (1999). Determination of the elastic properties of shales using single test specimen. In: Advances in Anisotropy - Selected Theory, Modeling and Case Studies. SEG publication.

Hestholm, Stig and Bent Ruud (2000). 2D finite-difference viscoelastic wave modelling including surface topography, Geophysical Prospecting, 48, 341 - 373.

Jakobsen, M., J.A. Hudson, T.A. Minshull, and S.C. Sing (2000). Elastic properties of hydrate-bearing sediments using effective medium theory. J. Geophys. Res., Vol. 105, No. B1, 561 - 577

Jakobsen, Morten, and Tor Arne Johansen (2000). Anisotropic approximations for mudrocks: A seismic laboratory study, Geophysics, 65, 1711 - 1725.

Ruud, Bent and Stig Hestholm (2001). 2D surface topography boundary conditions in seismic wave modelling, Geophysical Prospecting, 49, 445 - 460.

Friis, Helmer André, Tor Arne Johansen Magne Haveraaen, Hans Munthe-Kaas, and Åsmund Drottning (2001). Use of coordinate-free numerics in elastic wave simulation, Applied Numerical Mathematics, 39, 151 - 171.

Jakobsen, Morten, Tor Arne Johansen, and Bent Ole Ruud (2001). Modeled velocity and reflectivity properties of anisotropic hydrated sediments, Journal of Computational Acoustics, 9(4), 1507 - 1522.

Johansen, Tor Arne, Åsmund Drottning, Isabelle Lecomte and Håvar Gjøystdal (2002). An approach to combined rock physics and seismic modelling of fluid substitution effects, Geophysical Prospecting, 50, 119-137.

Hestholm, Stig and Bent Ruud (2002). 3D free-boundary conditions for coordinate-transform finit-difference seismic modelling Geophysical Prospecting, 50, 463 - 474.

Johansen, Tor Arne, Morten Jakobsen, and Bent Ole Ruud (2002). Estimation of the internal structure and anisotropy of shales from borehole data, Journal of Seismic Exploration, 11, 363 - 381.

Conference Abstracts

Johansen, Tor Arne, and Morten Jakobsen (1999). Modelled velocity and reflectivity properties of anisotropic hydrated sediments. 4th International Conference on Theoretical and Computational Acoustics, Trieste, Italy, 10 - 14 May 1999.

Jakobsen, Morten, and Tor Arne Johansen (1999). On the prediction of the elastic properties of shales. 61st EAGE Conference and Technical Exhibition, Helsinki, 7 - 11 June 1999.

Johansen, Tor Arne, Bent O. Ruud and Morten Jakobsen (1999). Influence of the grain orientation distribution on the AVO of PP and PS waves. 62nd EAGE Conference and Technical Exhibition, Glasgow, 29 May - 2 June 2000.

Jakobsen, Morten, and Tor Arne Johansen (2000). Seismic anisotropy of shales and related media. Seismic waves in laterally inhomogeneous media V, Tjekkia, June 5-9, 2000.

Jakobsen, Morten, Tor Arne Johansen and Clive McCann (2002). The acoustic signature of fluid flow in complex porous media, 10th International Workshop on Seismic Anisotropy, Tutzing, Germany, April 14-19, 2002

Jakobsen, Morten, John A. Hudson and Tor Arne Johansen (2002). T-matrix approach to shale acoustics, 64th EAGE Conference and Technical Exhibition, Florence, Italy, 27 - 30 May 2002.

Ruud, Bent Ole and Tor Arne Johansen (2002). Seismic inversion using well-log data as a priori information, 64th EAGE Conference and Technical Exhibition, Florence, Italy, 27 - 30 May 2002.

Sognnes, H., Johansen, T.A., Langhammer, J. and Frømyr, E. (2002). AVA from multicomponent data for quantitative evaluation of gas hydrates. 64th EAGE Conference and Technical Exhibition, Florence, Italy, 27 - 30 May 2002.

Johansen, Tor Arne, Morten Jakobsen, and Bent Ole Ruud (2002). Use of well data for estimation of seismic anisotropy, AGU 2002 Fall Meeting, San Francisco, California, 6 - 10 Dec. 2002.

Graduate student theses

(Some theses are available for download.)

Torgersen, Espen (1998). Integrated geological and seismic modelling (in Norwegian).

Bakke, Roger (2000). Effects of interpolation and upscaling on log data. Download complete thesis in PDF (20 Mb)

Myhren, Bjarte (2000). Inversion for acoustic impedance and rock properties (in Norwegian). Download complete thesis in PDF (4.3 Mb)

Engenes, Kristoffer (2001). Potential use of SH-waves for seismic mapping of pore fluids and lithology (in Norwegian). Download complete thesis in PDF (2.4 Mb)

Ona, Ragnhild (2001). Observations and modelling of anisotropic rock properties (in Norwegian).

Sognnes, Helge Ivar (2001). Seismic methods for quantifying gas hydrates.

Dræge, Anders (2001). Effect of pressure on seismic velocities - a study of laboratory data (in Norwegian). Download complete thesis in PDF (1.8 Mb)

Thorsen, Camilla (2001). Prediction of rock properties from acoustic data in wells (in Norwegian). Download complete thesis in PDF (2.6 Mb)

Sam, Frederick (2001). Seismic properties of shaley rocks.

Tømmerbakke, Ronny (2002). Modelled pressure effects on seismic data.

Helvig, Kjetil (2002). Prediksjon av bergartsparemetre fra seismiske attributter.

Birkeland, Hege Susanne (2002). Seismic Wave Attenuation in Fluid Saturated Rocks. Download complete thesis in PDF (16 Mb)

Se our page on education for a list of on-going theses work.