2005
Lødøen,O.P. and Tjelmeland,H.; 2005: Bayesian calibration of hydrocarbon
reservoir models using an approximate reservoir simulator in the prior
specification; paper submitted for publication.
[copy]
Kolbjornsen,O. and
Omre,H.;2005: Bayesian Inversion of Piecewise Affine Operators in a Gaussian
Framework; Journal of Computational and Graphical Statistics, Vol.14, No.1,
pp.56-74.
Foss,S.K.;de Hoop,M.V. and Ursin,B.; 2005: Linearized 2.5-D parameter imaging-inversion in anisotropic
elastic media; Geophysical Journal International, Vol.161, pp.722-738.
Ursin,B.; de Hoop,M.V.; Foss,S.K. and Brandsberg-Dahl,S; 2005: Seismic angle tomography; The
Leading Edge, Vol.24,pp.628-634.
Ursin,B.; de Hoop,M.V.; Brandsberg-Dahl,S. and
Sollid,A.; 2005: Seismic angle migration; The Leading
Edge, Vol.24, pp.637-640.
Foss,S.K.; Ursin,B. and de Hoop,M.V.; 2005:
Depth consistent reflection tomography using PP and PS seismic data; Geophysics
in press.
Ursin,B.; 2004: Parameter
inversion and angle migration in anisotropic elastic media; Geophysics, Vol.
69, No. 5, pp 1125-1142.
Talukdar,M.S.;Torsæter,O.
and Howard,J.J; 2004: Stochastic reconstruction of
chalk samples containing vuggy porosity using a
conditional simulated annealing technique; Transport in Porous Media, Vol. 57,
pp. 1-15.
Lodoen,O.P.; Omre,H.; Durlofsky,L.J. and Chen,Y.; 2004:
Assessment of Uncertainty in Reservoir Production Forecasts using Upscaled Flow Models; to appear in Proceedings from Geostat 2004, Banff, Canada.
Tjelmeland,H. and Eidsvik, J.; 2004: Directional Metropolis-Hastings updates
for posteriors with nonlinear likelihoods; to appear in Proceedings from Geostat 2004,
Roislien,J. and King,P.; 2004: Prediction of oil production conditioned on
the breakthrough time; paper submitted for publication.
Omre,H. and Lodoen,O.P.;2004: Improved Production
Forecasts and History Matching using Approximate Fluid Flow Simulators; SPE
Journal; Sept. 2004, pp. 339-351.
Eidsvik,J.; Avseth,P.; Omre,H.; Mukerji,T. and Mavko,G.; 2004:
Stochastic Reservoir Characterization using Pre-stack Seismic Data; Geophysics, Vol. 69, No. 4, pp.
978-993.
Eidsvik,J. ; Mukerji,T. and Switzer,P.; 2004:
Estimation of geological attributes from well logs: an application of hidden
Markov chains; Mathematical Geology; Vol. 36, No. 3, pp 379-398.
Tjelmeland,H. and Eidsvik,J.;
2004: On the use of local optimizations within Metropolis-Hastings updates;
Journal of the Royal Statistical Society, Series B, Vol. 66, pp 411-427.
Foss,S.K. and Ursin,B.;
2004: 2.5D modelling, inversion and angle migration
in anisotropic elastic media; Geophysical Prospecting; Vol. 52, Issue 1, pp
65-84.
Stovas,A. and Ursin,B.; 2004: New traveltime
approximations for a transversely isotropic medium, Journal of Geophysical
Engineering, Vol. 1, pp 128-133.
Foss,S.K.; Ursin,B. and Sollid,A.; 2003: A
practical approach to PP seismic angle tomography; paper submitted for
publication.
Eidsvik,J. and Tjelmeland,H.; 2003: On directional Metropolis-Hastings
algorithms; accepted for publication in Statistics and Computing.
Theting,T.G.; 2003:
Solving Parabolic Wick-stochastic Boundary Value Problems using a Finite
Element Method; Stochastics and Stochastic Reports,
Vol.75, No.1-2, pp 49-77.
Buland,A.; Kolbjornsen,O. and Omre,H.; 2003:
Rapid spatially coupled AVO inversion; Proceedings of 73rd SEG International
Exposition and Annual Meeting;
Holden,H.; Karlsen,K.H. and Risebro;N.H.;
2003: On uniqueness and existence of entropy solutions of weakly coupled
systems of nonlinear degenerate parabolic equations; Electronic Journal of
Differential Equations, Vol.2003, No.46, pp 1-31.
Sollid,A. and Ursin,B.; 2003: Scattering-angle migration of ocean-bottom
seismic data in weakly anisotropic media; Geophysics, Vol.68, No.1, pp 641-655.
Stovas,A. and Ursin,B.; 2003: Reflection and transmission responses of
layered transversely isotropic viscoelastic media;
Geophysical Prospecting, Vol.51, No.5, pp 447-477.
Brandsberg-Dahl,S.; Ursin,B. and de Hoop,M.V.; 2003:
Seismic velocityanalysis in the
scattering-angle/azimuth domain; Geophysical Prospecting, Vol.51, No.5,
pp295-314.
Buland,A. and
Omre,H.;2003:Bayesian Wavelet Estimation from Seismic and Well Data;
Geophysics, Vol.68, No. 6, pp. 2000-2009.
Buland,A. and Omre,H.; 2003: Joint AVO inversion, wavelet estimation, and
noise level estimation using a spatially coupled hierachical
model; Geophysical Prospecting, 51, pp 531-550.
Buland,A.; Kolbjørnsen,O. and Omre,H.; 2003:
Rapid spatially coupled AVO inversion in the Fourier domain; Geophysics,
Vol.68, No.1, pp 824-836.
Buland,A. and Omre,H.; 2003: Bayesian seismic inversion and estimation in
a spatial setting, Extended abstract, 65th EAGE Conference and Exhibition,
Buland,A. and
Omre,H.;2003: Bayesian Linerized AVO Inversion ;
Geophysics, Vol. 68, No.1, pp 185-198.
Brandsberg-Dahl,S,; de Hoop,M.V. and Ursin,B.; 2003:
Focusing in dip and AVA compensation on scattering angle/azimuth common image
gathers; Geophysics, 68, pp 232-254.
Stovas,A.; Landrø,M.; Torsæter,O.; Jensen,J.I. and Kleppe,J.; 2003: An integrated study of reservoir fluid
flow across faults by laboratory experiments, 4D seismics
and reservoir simulation, Extended abstract,
65th EAGE Conference and Exhibition,
Manouzi,H. and Theting,T.G.; 2003: Mixed Finite Element Approximation for
the Stochastic Pressure Equation of Wick-type; to appear in IMA Journal of
Numerical Analysis.
Switzer,P.; Mukerji,T. and Eidsvik,J.; 2003:
Hidden Markov models for stratigraphic sequences with
application to well log data; Extended abstract; by invitation at ISI Meeting;
Eidsvik,J.; Omre,H.; Mukerji,T.; Mavko,G. and Avseth,P.; 2002:Stochastic reservoir predictionusing
Bayesian integration of rock physics relations and Markov random fields; The
Leading Edge, Vol 21, No 3,March 2002, pp. 290-294.
Eidsvik,J.; Mukerji,T.
and Switzer,P.; 2002: Modelling
lithofacies alternations from well logs using
hierarchical Markov chains; Extended abstract; SEG Annual Meeting; Salt Lake
City, Utah.
Eide,A.L.; Omre,H. and Ursin,B.; 2002:
Prediction of Reservoir Variables Based on Seismic Data and Well Observations;
Journal of the American Statistical Association (JASA), Vol
97, No 457, pp 18-28.
Borgos,H.G.; Omre,H. and Townsend,C.;2002: Size Distribution of
Geological Faults: Model Choice and Parameter Estimation; Statistical Modelling, Vol 2, pp 217-234.
Omre,H.;2002: Stochastic Reservoir Models
Conditioned to Non-linear Production History Observations; in Kleingeld and Krige (eds) Geostatistics 2000
Borgos,H.G. and
Omre;H.;2002: Uncertainty in Fault Geometries; in Kleingeld
and Krige (eds) Geostatistics 2000
Ettrich,N.; Sollid,A. and Ursin,B.;2002: Out-of-plane geometrical
spreading in anisotropic media; Geophysical Prospecting, 50, pp 383-392.
Ursin,B. and StovasA.; 2002: Reflection and transmission responses of a
layered isotropic visco-elastic medium, Geophysics,
67, pp 307-323.
Benth,F.E. and Theting,T.G.; 2002: Some regularity results for the
stochastic pressure equation of Wick-type; Stochastics
and Stochastic Reports, Vol.20, No.6, pp 1191-1223.
Theting,T.G.; 2002:
Numerical Solution of Wick-stochastic Partial Differential Equations; paper
submitted for publication.
Talukdar;M.S. and Torsater;O.;
2002: Reconstruction of chalk pore networks from 2D back scatter electron
micrographs using a simulated annealing technique; Journal of Petroleum Science
and Engineering, Vol. 33, pp. 265-282.
Talukdar;M.S.; Torsater;O.; Ioannidis;M.A. and Howard;J.J.; 2002: Sochastic
reconstruction of chalk from 2D images; Transport in Porous Media, Vol 48, pp. 101-123.
Talukdar;M.S.; Torsater;O.; Ioannis;M.A. and Howard;J.J.; 2002: Stochastic reconstruction, 3D
characterization and network modelling of chalk;
Journal of Petroleum Science and Engineering, Vol. 35; pp 1-21.
Hegstad,B.K. and Omre,H.;2001: Uncertainty in
Production Forecasts based on Well Observations, Seismic Data and Production
History; SPE Journal; Dec. 2001, pp
409-424.
Buland,A. and Omre,H.;2001: Bayesian Wavelet
Estimation from Seismic and Well Log Data; extended abstract in Proceedings
from EAGE 63rd Conference and Technical Exhibition; Amsterdam, The Netherlands;
June 2001
Stovas,A. and
Ursin,B.;2001: Second order approximations of the reflection and transmission
coefficients between two visco-elastic isotropic
media; Journal of Seismic Exploration, 9, pp 223-233.
Helle,H.B.; Bhatt,A. and Ursin,B.; 2001:
Porosity and permeability prediction from wireline
logs using artificial neural networks. A
Schleicher,J.; Tygel,M.; Ursin,B. and Bleistein,N.; 2001: The Kirchhoff-Helmholtz integral for
anisotropic elastic media; Wave Motion, 34, pp 353-364.
Toverud,T.; Dimri,V.P. and Ursin,B.; 2001:
Comparison of deconvolution methods for scaling
reflectivity; Journal of Geophysics, 22, pp 117-123.
Theting,T.G.; 2000:
Solving Wick-stochastic Boundary Value Problems using a Finite Element Method; Stochastics and Stochastics
Reports; Vol.70, No.3-4, pp 241-270.
Holden,H. and
Øksendal,B.;2000: A white noice approach to
stochastic Neumannboundary value problems; Acta Applicandae Matematicae 63, pp 141-150.
Holden,H.; Karlsen,H.K. and Lie,K.A.; 2000:
Operator splitting methods for degenerate convection-diffusion equations II:
Numerical examples with emphasis on reservoir simulation and sedimentation;
Computational Geosciences 4, pp 287-322.
Talukdar,S.; Banu,H. ; Torsæter,O. and
Kleppe,J.;2000: Applicability and Rate Sensitivity of Several Upscaling Techniques in Fractured Reservoir Simulations;
Proceedings from 2000 SPE International Petroleum Conference and Exhibition;
Jelmert,T.A.; Selseng,H. and Torsæter,O.;2000: Average Permeability
Functions of Cores with Stress-Sensitivity; Oil and Gas Journal, Vol.98.24, pp.
52-62; June 2000
Causse,E. and Ursin,B.; 2000: Viscoacoustic
reverse-time migration; Journal of Seismic Exploration, 9, pp 165-184.
Ursin,B. and Porsani,M.J.; 2000: Estimation of an optimal mixed-phase
inverse filter; Geophysical Prospecting, 48, pp 663-676.
Porsani,M.J. and Ursin,B.; 2000: Mixed-phase deconvolution
and wavelet estimation; Leading Edge, 19, pp 76-79.
Tweheyo,M.T.; Holt,T. and Torsæter,O.;1999: An Experimental Study of the
Relationship between Wettability and Oil Production
Characteristics; Journal of Petroleum Science & Engineering, Vol. 24,
pp.179-188; Dec. 1999
Lu,G.; Ursin,B. and Lutro,J.; 1999:
Model-based removal of water-layer multiple reflections, Geophysics, 64, pp
1816-1827.
Causse,E. and Ursin,B.; 1999: Asymptotic error analysis of constant
velocity viscoacoustic migration; Geophysics, 64, pp
1036-1045.
Ekren,B.O. and Ursin,B.; 1999: True-amplitude frequency-wave-number
constant-offset migration, Geophysics, 64, pp 915-924.
Tygel,M. and Ursin,B.; 1999: Weak-contrast edge and vertex diffractions
in anisotropic elastic media, Wave motion, 29, pp 363-373.
Causse,E,; Mittet,R. and Ursin,B.; 1999:
Preconditioned full-waveform inversion in generall viscoacoustic media; Geophysics, 64, pp 130-145.
Holden,H. and Øksendal,B.;1999: A white noise
approach to stochastic differential equations driven by Wiener and Poisson
processes; in Nonlinear Theory of Generalized Functions; Eds. Grosser, Hormann, Kunziger and Obenguggenberger; Chapmann and
Hall.
Holden,H.; Øksendal,B.; Ubøe,J. and
Zhang,T.S.;1996: Stochastic Partial Differential Equations; Birkhauser
Verlag