Petter Abrahamsen

GIG annual meeting 2025 - Summary of 2024 and planned work for 2025 2025. Report

GIG annual meeting 2024 - summary of 2023 and planned work for 2024 2024. Report

Norwegian Computing Center, Joining Forces: Solving the energy challenges together 2024. Lecture

Using Pattern Counts to Quantify the Difference Between a Pair of Three-Dimensional Realizations Mathematical Geosciences, vol. 56, pp. 1629 1639 , (ISSN 1874-8961 1874-8953 ), doi: https://doi.org/10.1007/s11004-024-10145-6 , 2024. Scientific article

Consistent prediction of well paths and geological surfaces Computational Geosciences, vol. 28, pp. 1099 1113 , (ISSN 1420-0597 1573-1499 ), doi: https://doi.org/10.1007/s10596-024-10310-0 , 2024. Scientific article

PCube User Manual Version 10.5 2024. Report

PCube User Manual version 10.0 2023. Report

PCube reference manual 2023. Report

Uncertainty, probability and bad luck 2023. Lecture

Conditioning geological surfaces to horizontal wells Computational Geosciences, (ISSN 1420-0597 1573-1499 ), doi: https://doi.org/10.1007/s10596-022-10154-6 , 2022. Scientific article

GIG annual meeting 2022 - Summary of 2021 and planned work for 2022 2022. Report

GIG annual meeting 2021 - Summary of 2020 and planned work for 2021 2021. Report

Fra verdifulle oljefelt til farlige løsmasser med COHIBA , 2021. Media participation

Geostatistisk kartlegging av løsmasser 2021. Report

Assessing Multiple-Point Statistics by use of pattern counts to compare images 2021. Report

GIG annual meeting 2020 Summary of 2019 and planned work for 2020 2020. Report

Decision Nodes - Uncertainty propagation in decision trees 2020. Report

Dip point coordinates in COHIBA 2020. Report

Compendium of Linvel formulas used in Cohiba 2020. Report

COHIBA User Manual Version 6.1 2020. Report

Handling true vertical depth (TVD) uncertainty in wells 2019. Lecture

A historic perspective on Bayesian surface modelling 2019. Lecture

Getting the zonation right. A synthetic real-time case study 2019. Lecture

A novel implementation of the LinVel model 2019. Lecture

Getting the most out of your deep directional resistivity data 2019. Lecture

Compaction and Subsidence 2019. Lecture

COHIBA - Consistent, robust, and accurate prediction of surfaces 2019. Lecture

Volume estimation, simulation and rejection sampling - Some rarely used COHIBA features 2019. Lecture

Applied Geostatistics and Geomodelling 2019 2019. Lecture

PCube+ principles 2019. Lecture

PCube+ principles 2019. Lecture

Machine learning - Finding Cut Rocks and Cute Animals 2019. Lecture

Modelling Techniques 2019. Lecture

GIG annual meeting 2019 - Summary of 2018 and planned work for 2019 2019. Report

Kriging Derivatives , 2019. Report

Application of NR’s Solutions to Geothermal Reservoir Characterization 2019. Report

COHIBA User Manual Version 6.0 2019. Report

Increasing subsurface accuracy with COHIBA by taking advantage of resistivity contrasts 2019. Report

Simulation of Gaussian Random Fields Using the Fast Fourier Transform (FFT) doi: https://doi.org/10.3997/2214-4609.201802134 , 2018. Scientific chapter / article / conference article

COHIBA and velocity models linear in depth 2018. Report

Cohiba User Manual Version 5.6 , 2018. Report

Simulation of Gaussian Random Fields Using the Fast Fourier Transform 2018. Report

Fast and Accurate Approximation to Kriging Using Common Data Neighborhoods Mathematical Geosciences, vol. 49, pp. 619 634 , (ISSN 1874-8961 1874-8953 ), doi: https://doi.org/10.1007/s11004-016-9665-7 , 2017. Scientific article

GIG annual meeting 2018 Summary of 2017 planned work for 2018 2017. Report

Cohiba User Manual Version 5.5 , 2017. Report

Norsk Regnesentral, Joining Forces 2016 2016. Lecture

Geostatistics course 2016. Lecture

Cohiba User Manual Version 5.4 2016. Report

Simultaneous prediction of geological surfaces and well paths 2015. Lecture

Four days course in Geostatistics and Advanced Geomodelling 2015. Lecture

Geostatistics course 2015. Lecture

Surface prediction using rejection sampling to handle non-linear constraints Bulletin of Canadian petroleum geology, vol. 63, pp. 304 317 , (ISSN 0007-4802 ), doi: https://doi.org/10.2113/gscpgbull.63.4.304 , 2015. Scientific article

Efficient Neighborhoods for Kriging with Numerous Data , 2015. Scientific lecture

Simultaneous prediction of geological surfaces and well paths , 2015. Scientific lecture

A continuous model for well depths: theory and application to well repositioning 2015. Scientific lecture

Geologisk modellering på Norsk Regnesentral 2015. Lecture

Detailed analyses for Cohiba depth conversion on the Johan Sverdrup Oil Field 2015. Report

Depth conversion on the Johan Sverdrup Oil field - using Cohiba 2015. Report

Surface modelling in fault blocks using COHIBA: A feasibility study 2015. Report

Cohiba User Manual, Version 5.1 , 2015. Report

Cohiba User Manual Version 5.3 , 2015. Report

Cohiba User Manual Version 5.2 , 2015. Report

An Uncertainty Model for Fault Shape and Location Mathematical Geosciences, vol. 46, pp. 957 969 , (ISSN 1874-8961 1874-8953 ), doi: https://doi.org/10.1007/s11004-014-9536-z , 2014. Scientific article

Surface prediction using rejection sampling to handle non-linear relationships 2014. Scientific lecture

Impact on Gross-Rock Volume Distributions from Uncertainties in Surfaces and Hydrocarbon Contacts 2014. Scientific lecture

Detailed analysis for Cohiba depth conversion on the Johan Sverdrup Field Rev. 2 2014. Report

Using Multiple Grids in Markov Mesh Facies Modeling Mathematical Geosciences, vol. 46, pp. 205 225 , (ISSN 1874-8961 1874-8953 ), doi: https://doi.org/10.1007/s11004-013-9499-5 , 2013. Scientific article

Norsk Regnesentral(NR)/Norwegian Computing Center 2013. Lecture

COHIBA user manual version 4.2 (SAND/10/13) 2013. Report

COHIBA technical manual (SAND/12/13) 2013. Report

SAND 2013 - Kiel 2013. Report

Cohiba User Manual Version 4.1 , 2013. Report

A Study on How Cap Rock Geometry Influences the CO2 Storage Capacity 2012. Poster

Geostatistics Oslo 2012 (ISSN 9789400741522 ), , 2012. Scientific anthology / conference series

Added Value by Fast and Robust Conditioning of Structural Surfaces to Horizontal Wells for Real-World Reservoir Models doi: https://doi.org/10.2118/159746-ms , 2012. Scientific chapter / article / conference article

A Study on How Top-Surface Morphology Influences the Storage Capacity of CO2 in Saline Aquifers pp. 481 492 , doi: https://doi.org/10.1007/978-94-007-4153-9_39 , 2012. Scientific chapter / article / conference article

A Fast and Consistent Geostatistical Approach for Constraining 3D Structural Models to Horizontal Wells , 2012. Scientific lecture

A Study of How Top-Surface Morphology Influences the Storage Capacity of CO2 in Saline Aquifers 2012. Scientific lecture

Cohiba User Manual Version 4.0 2012. Report

Cohiba User Manual Version 3.1.1 , 2012. Report

Grenseløst - matematikk 2011. Media participation

A study on how top surface morphology influences the CO2 storage capacity 2011. Scientific lecture

Terningkast i oljebransjen 2011. Lecture

Geostatistics course 2011. Lecture

Methods of the Markov Mesh Multi-Grid Module in RMS 2011. Report

Cohiba user manual Version 2.5 2011. Report

COHIBA user manual - Version 2.3 2011. Report

Cohiba user manual version 3.0 2011. Report

Parallelization of Petrosim 2011. Report

COHIBA user manual - Version 2.4 2011. Report

A Consistent Geostatistical Approach for Constraining Multiple Surfaces to Horizontal Wells , 2010. Poster

Flexible Simulation of Faults , 2010. Scientific chapter / article / conference article

Statistics in the petroleum industry 2010. Scientific lecture

SPE 134912 - Flexible Simulation of Faults 2010. Scientific lecture

COHIBA user manual - Version 2.0 , 2010. Report

COHIBA user manual — Version 2.1 , 2010. Report

COHIBA user manual — Version 2.2 , 2010. Report

STK 4050 Stochastic Simulation – Some Practical Applications and Problems , 2009. Scientific lecture

Geostatistics course 2009. Lecture

Methods of the Multipoint Module in RMS 2009. Report

COHIBA — Technical Documentation 2009. Report

Conditioning Surfaces on Hydrocarbon Contacts in COHIBA 2009. Report

Surface based fault format in Havana , 2009. Report

SAND 2009 2009. Report

COHIBA user manual version 1.4.1 , 2009. Report

Multidimensional Scaling and Anisotropic Covariance Functions pp. 187 196 , 2008. Scientific chapter / article / conference article

Reservoir Characterization Improvement by Accounting for Well Test Extracted Effective Permeabilities 2008. Scientific lecture

TuMod – Process Based Stochastic Modelling of Deep Marine Deposits 2008. Scientific lecture

Stochastic modelling of deep marine deposits by mimicking sedimentary processes 2008. Scientific lecture

COHIBA course 2008. Lecture

COHIBA - Technical Documentation 2008. Report

Main Results of the Multipoint Project , 2008. Report

Modification of the Snesim Algorithm 2008. Report

An implementation of conditional Markov mesh simulation with parameter estimation , 2008. Report

Process based modelling of deep marine reservoir systems 2007. Scientific lecture

TuMod – Stochastic Modeling of Turbidite Sedimentation , 2007. Scientific lecture

Process Based Stochastic Modeling of Deep Marine Reservoirs , 2007. Scientific lecture

Stochastic Modeling of Turbidite Sedimentation 2007. Scientific lecture

Modification of the SNESIM algorithm , 2007. Scientific lecture

Combining Well Logs and Well Test Data in Permeability Modelling Using Fast Fourier Transform , 2007. Scientific lecture

Stochastic modelling of deep - marine deposits , 2007. Scientific lecture

A process based attempt to re-create the Peïra Cava sub-basin, SE France , 2007. Scientific lecture

Geostatistics course 2007. Lecture

STK 4050 Stochastic Simulation – Some Practical Applications and Problems , 2007. Lecture

COHIBA user manual 2007. Report

Combining Well Logs and Well Test Data in Permeability Modelling 2007. Report

Cohiba 0.2 Specification and design document 2006. Report

SAND 2005 , 2006. Report

When can shape and scale parameters of a 3D variogram be estimated? pp. 949 958 , , 2005. Scientific chapter / article / conference article

Theory and application of the cloud transform pp. 45 54 , , 2005. Scientific chapter / article / conference article

Combining Methods for Subsurface Prediction pp. 601 610 , , 2005. Scientific chapter / article / conference article

Stochastic models linking physics, interpretations, and ambiguities 2005. Scientific lecture

The Cloud Transform 2004. Scientific lecture

Stochastic modelling linking physics, interpretations, and ambiguities 2004. Scientific lecture

Correlation Study for inverted seismic on Oseberg Øst 2004. Report

Application of multiple point statistics to the Oseberg Øst field 2003. Report

Kriging with inequality constraints Mathematical Geology, vol. 33, pp. 719 744 , (ISSN 0882-8121 1573-8868 ), doi: https://doi.org/10.1023/1011078716252 , 2001. Scientific article

Recent development in conditioning reservoir models using geostatistics 2001. Scientific lecture

Estimation of gross rock volume of filled geological structures with uncertainty measures SPE Reservoir Evaluation and Engineering, vol. 3, pp. 304 309 , (ISSN 1094-6470 1930-0212 ), doi: https://doi.org/10.2118/65419-PA , 2000. Scientific article

Modelling spatial and temporal dependencies between earthquakes 2000. Scientific chapter / article / conference article

Efficient numerical algorithms for large cokriging systems 2000. Report

Kriging with inequality constraints 2000. Report

Make decisions using stochastic models Springer Verlag, Springer -Lehrbuch, , 1999. Scientific article

Faults and horizon modelling 1999. Scientific lecture

Why use stochastic models with time consuming simulation algorithms 1999. Scientific lecture

FFT algorithm for simulating Gaussian random fields 1999. Report

Specification of new petrophysical modelling tool 1999. Report

Gaussian field with unknown trend conditioned on inequality data - Proceedings of the 4th annual conference of the International Association for Mathematical Geology Ukjent, pp. 333 338 , , 1998. Scientific article

Uncertain Cap Rock Geometry, Spill Point, and Gross Rock Volume, SPE 49286 1998. Scientific lecture

Statistical analysis of seismic time data from the Troll field 1998. Report

Prediction of geological subsurfaces based on Gaussian random field models 1997. Doctor dissertat

Seismic impedance and porosity: Support effects 1997. Scientific chapter / article / conference article

Seismic image analysis: A pilot study for investigating the relevance of using image analysis techniques on seismic data 1997. Report

HCPV evaluation of Sleipner Øst and Loke 1997. Report

HCPV studium for PL199b 1997. Report

A Review of Gaussian random fields and correlation functions - Second edition (ISSN 9788253904351 ), , 1997. Report

Conditioning a Fluvial Model on Convolved Seismic Amplitudes 1997. Report

Bayesian kriging of Gaussian fields constrained by inequality data 1997. Report

Velocity log data in DepCon 1997. Report

Moments of the maximum of two correlated normals 1997. Report

Stochastic reservoir characterization using AVO inversion Ukjent, 1996. Science for the public article

3D-AVO in stochastic reservoir modelling - geostatistical methods for data integration 1996. Scientific lecture

Current and future methods for conditioning of reservoir descriptions to seismic data 1996. Scientific lecture

Geostatistics for seismic depth conversion , 1996. Report

A geostatistical analysis of well data 1996. Report

Conditioning stochastic reservoir models on seismic amplitude traces - Stochastic inversion and simulation 1996. Report

Estimation of reserves with unknown spillpoint , 1996. Report

Geostatistics course 1995. Scientific lecture

HCPV evaluation of Troll Olje Gas Province 1995. Report

Probability density functions for hydrocarbon contacts 1995. Report

Ambiguous models for subsurface prediction , 1995. Report

Random functions and geological subsurfaces Ukjent, pp. 22 22 , 1994. Scientific article

Geostatistics course 1994. Scientific lecture

Kriging derivatives 1994. Scientific lecture

Stochastic description of geological subsurfaces 1994. Scientific lecture

A review of Gaussian random fields and correlation functions (ISSN 9788253903736 ), 1994. Report

DepCon 3.0 - User guide. Adapted from on-line help system 1994. Report

Bayesian kriging for seismic depth conversion of a multi-layer reservoir pp. 385 398 , 1993. Scientific chapter / article / conference article

A location dependent linear velocity model 1993. Report

HORIZON 4.1 - extension to 4.0 user guide and theory for horizon_dc 1993. Report

DepCon 2.1 - User Guide. Adapted from on-line help system 1993. Report

An integrated approach to prediction of hydrocarbon in place and recoverable reserve with uncertainty measures Ukjent, 1992. Scientific article

HORIZON 4 - Geometrical module. User guide and theory for HORIZON_dc 1992. Report

DepCon: Theory and methods 1992. Report

DepCon. Version 2.0. User guide. Adapted from on-line help system 1992. Report

Stokastisk feltteori anvendt på seismisk dybdekonvertering 1991. Scientific lecture

New estimates of HCPV with uncertainty for SMØRBUKK SOUTH 1991. Report

Oil in place - estimates with uncertainty for NJORD 1991. Report

Decisions on development and appreciation of information 1991. Report

Stochastic models for seismic depth conversion of geological horizons 1991. Report

Utvinnbar ressurs som funksjon av antall dreneringspunkter - anslag med usikkerhet 1990. Report

Potensiell reduksjon i usikkerheten til anslaget på hydrokarbonreserver i Gullfaks Sør. Resultater for testproduksjonsmodell. Hefte I, II og III 1990. Report

Programmering i FORTRAN - retningslinjer og råd for SAND 1990. Report

Tilstedeværende ressurs og utvinnbar ressurs i Gullfaks Sør - anslag med usikkerhet. Hefte I, II, III og IV 1990. Report

Prediksjon av tilstedeværende hydrokarbonvolum 1989. Scientific lecture

Analyse av stackinghastighetsdata med hovedvekt på bestemmelse av usikkerhet - forprosjekt 1989. Report

Geometrical characteristics og Gyda reservoir - Preliminary report 1989. Report

HORIZON/STACK - brukerveiledning og teknisk dokumentasjon 1989. Report

Romlige usikkerheter i intervallhastigheter. Uttesting av programmet HORIZON/STACK 1989. Report

HORIZON 3.1 - brukerveiledning og teknisk dokumentasjon 1989. Report

Random walk in field theories Ukjent, 1988. Article journal

Kan en computer inndele en brønn i sedimentære facies uten å anvende andre data enn logger? 1988. Report

Simulations of hydrocarbon pore volume for Smørbukk south 1988. Report

En undersøkelse av muligheten for å skille vannsoner fra oljesoner på grunnlag av loggmålinger 1988. Report