Dr Robert Sok

Department	Materials Physics
Research group
Office phone	(02) 612 56519
Email
Office	Cockcroft 3 27

Publications

Publications

Journal article

Oren P, Ruspini L, Saadatfar M, Sok R, Knackstedt M, Herring A
In-situ pore-scale imaging and image-based modelling of capillary trapping for geological storage of CO2
International Journal of Greenhouse Gas Control 87(2019) 34-43

Kumar M, Sok R, Knackstedt M, Latham S, Senden T, Sheppard A, Varslot T, Arns C
Mapping 3D Pore Scale Fluid Distributions: How Rock Resistivity is Influenced by Wettability and Saturation History
Petrophysics 51, 2(2010) 102-117

Olafuyi A, Sheppard A, Arns C, Sok R, Cinar Y, Knackstedt M, Pinczewski W
Experimental Verification of Effect of Size on Drainage Capillary Pressure Computed from Digitized Tomographic Images
International Journal of Engineering Research in Africa 1(2010) 1-10

Sakellariou A, Kingston A, Varslot T, Sheppard A, Latham S, Sok R, Arns C, Senden T, Knackstedt M
Tomographic image analysis and processing to simulate micro-petrophysical experiments
Proceedings of SPIE - Progress in Biomedical Optics and Imaging 7804(2010) 9

Sok R, Varslot T, Ghous A, Latham S, Sheppard A, Knackstedt M
Pore scale characterization of carbonates at multiple scales: integration of micro-CT BSEM and FIBSEM
Petrophysics 51, 6(2010) 379-387

Kumar M, Senden T, Knackstedt M, Latham S, Pinczewski W, Sok R, Sheppard A, Turner M
Imaging of Pore Scale Distribution of fluids and Wettability
Petrophysics 50, 4(2009) 311-321

Sakellariou A, Arns C, Sheppard A, Sok R, Averdunk H, Limaye A, Jones A, Senden T, Knackstedt M
Developing a virtual materials laboratory
Materials Today 10, 12(2007) 44-51

Goel A, Arns C, Holmstad R, Gregersen O, Bauget F, Averdunk H, Sok R, Sheppard A, Knackstedt M
Analysis of the impact of papermaking variables on the structure and transport properties of paper samples by X-ray microtomography
Journal of Pulp and Paper Science 32, 3(2006) 1-12

Knackstedt M, Arns C, Saadatfar M, Senden T, Limaye A, Sakellariou A, Sheppard A, Sok R, Schrof W, Steininger H
Elastic and transport properties of cellular solids derived from three-dimensional tomographic images
Proceedings of the Royal Society of London Series A: Mathematical, Physical and Engineering Sciences 462, 2073(2006) 2833-2862

Sheppard A, Arns C, Sakellariou A, Senden T, Sok R, Averdunk H, Saadatfar M, Limaye A, Knackstedt M
Quantitative properties of complex porous materials calculated from X-ray CT images
Proceedings of SPIE - Progress in Biomedical Optics and Imaging 7, 38(2006) 631811/1-15

Arns C, Bauget F, Limaye A, Sakellariou A, Senden T, Sheppard A, Sok R, Pinczewski W, Bakke S, Berge L, Oren P, Knackstedt M
Pore-Scale Characterization of Carbonates Using X-Ray Microtomography
SPE Journal December 2005(2005) 475-484

Ghous A, Pinczewski W, Knackstedt M, Arns C, Bauget F, Sakellariou A, Senden T, Sheppard A, Sok R, Kelly J
Digital Core Laboratory: Petrophysical Analysis from 3D Imaging of Reservoir Core Fragments
Petrophysics 46, 4(2005) 18

Knackstedt M, Arns C, Saadatfar M, Senden T, Sakellariou A, Sheppard A, Sok R, Schrof W, Steininger H
Virtual Materials Design: Properties of Cellular Solids Derived from 3D Tomographic Images
Advanced Engineering Materials 7, 4(2005) 238-243

Arns J, Robins V, Sheppard A, Sok R, Pinczewski W, Knackstedt M
Effect of Network Topology on Relative Permeability
Transport in Porous Media 55(2004) 21-46

Jones A, Milthorpe B, Averdunk H, Limaye A, Senden T, Sakellariou A, Sheppard A, Sok R, Knackstedt M, Brandwood A, Rohner D, Hutmacher D
Analysis of 3D Bone Ingrowth into Polymer Scaffolds via Micro-computed Tomography Imaging
Biomaterials 25(2004) 4947-4954

Jones A, Sheppard A, Sok R, Arns C, Limaye A, Averdunk H, Brandwood A, Sakellariou A, Senden T, Milthorpe B, Knackstedt M
Three-dimensional Analysis of Cortical Bone Structure using X-ray Micro-computed Tomography
Physica A: Statistical mechanics and its applications 339(2004) 125-130

Saadatfar M, Knackstedt M, Arns C, Sakellariou A, Senden T, Sheppard A, Sok R, Steininger H, Schrof W
Polymeric Foam Properties Derived from 3D Images
Physica A: Statistical mechanics and its applications 339(2004) 131-136

Sheppard A, Sok R, Averdunk H
Techniques for image enhancement and segmentation of tomographic images of porus materials
Physica A: Statistical mechanics and its applications 339(2004) 145-151

Turner M, Knuefing L, Arns C, Sakellariou A, Senden T, Sheppard A, Sok R, Limaye A, Pinczewski W, Knackstedt M
Three-dimensional Imaging of Multiphase Flow in Porous Media
Physica A: Statistical mechanics and its applications 339(2004) 166-172

Arns C, Sakellariou A, Senden T, Sheppard A, Sok R, Pinczewski W, Knackstedt M
Petrophysical Properties Derived from X-ray CT Images
APPEA Journal 43(2003) 577-586

Arns J, Arns C, Sheppard A, Sok R, Knackstedt M, Pinczewski W
Relative Permeability from Tomographic Images: Effect of Correlated Heterogeneity
Journal of Petroleum Science and Engineering 39(2003) 247-259

Sok R, Knackstedt M, Sheppard A, Pinczewski W, Paterson L
Direct and Stochastic Generation of Network Models from Tomographic Images: Effect of Topology on Residual Saturations
Transport in Porous Media 46(2002) 345-372

(22 publications)

Conference paper

Knackstedt M, Arns C, Ghous A, Sakellariou A, Senden T, Sheppard A, Sok R, Nguyen V, Pinczewski W
3D imaging and characterization of the pore space of carbonate core; implications to single and two phase flow properties
SPWLA 47th Annual Logging Symposium 2006 ?, ?(2018) 1-15

Knackstedt M, Latham S, Sheppard A, Sok R, Kumar M
Rock Typing Across Disciplines
Society of Petrophysicists and Well Log Analysts Annual Symposium 2011 ?, ?(2011) 9

Knackstedt M, Jaime P, Butcher A, Botha P, Middleton J, Sok R, Sok R, Botha P
Integrating reservoir characterization: 3D dynamic, petrophysical and geological description of reservoir facies
SPE Asia Pacific Oil and Gas Conference and Exhibition 2010, APOGCE 2010 3(2010) 1589-1597

Kumar M, Knackstedt M, Latham S, Senden T, Sheppard A, Sok R, Varslot T, Arns C
Mapping fluid distributions in 3D at the pore scale: Quantifying the influence of wettability and saturation history on rock resisitivity
Annual Logging Symposium of the Society of Petrophysicists & Well Log Analysts (SPWLA 2009) ?, ?(2009) 18

Sok R, Varslot T, Ghous A, Latham S, Sheppard A, Knackstedt M
Pore scale characterization of carbonates at multiple scales: integration of micro-CT, BSEM and FIBSEM
International Symposium of the Society of Core Analysts 2009 ?, ?(2009)

Ghous A, Knackstedt M, Arns C, Sheppard A, Kumar M, Sok R, Senden T, Latham S, Jones A, Averdunk H, Pinczewski W
3D Imaging of Reservoir Core at Multiple Scales; Correlations to Petrophysical Properties and Pore Scale Fluid Distributions
International Petroleum Technology Conference 2008 4(2008) 10

Knackstedt M, Arns C, Madadi M, Sheppard A, Latham S, Sok R, Bachle G, Eberli G
Elastic and flow properties of carbonate core derived from 3D X ray-CT images
78th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2008 ?, ?(2008) 1804-1809

Knackstedt M, Sok R, Sheppard A, Latham S, Madadi M, Varslot T, Arns C, Bachle G, Eberli G
Probing Pore Systems in Carbonates: Correlations to Petrophysical Properties
Society of Petrophysicists and Well Log Analysts Annual Symposium 2008 ?, ?(2008) 16

Kumar M, Senden T, Knackstedt M, Latham S, Pinczewski W, Sok R, Sheppard A, Turner M
Wettability effects on the pore scale distribution of fluids
International Symposium of the Society of Core Analysts 2008 ?, ?(2008) 13

Ghous A, Senden T, Sok R, Sheppard A, Pinczewski W, Knackstedt M
3D Characterisation of Microporosity in Carbonate Cores
Middle East Regional SPWLA Symposium: Petrophysics and Brown Field Resource Optimization ?, ?(2007) 11

Knackstedt M, Arns C, Sakellariou A, Senden T, Sheppard A, Sok R
X-Ray Micro-tomography applications of Relevance to the Petroleum Industry
Symposium on Portable Synchrotron Light Sources and Advanced Applications 2007 902(2007)

Knackstedt M, Arns C, Sheppard A, Senden T, Sok R, Cinar Y, Olafuyi A, Pinczewski W, Padhy G, Ioannidis M
Pore scale analysis of electrical resistivity in complex core material
International Symposium of the Society of Core Analysts 2007 ?, ?(2007) Paper Number SCA2007-P53

Knackstedt M, Arns C, Sheppard A, Senden T, Sok R, Cinar Y, Pinczewski W, Ioannidis M, Padhy G
Archie's exponents in complex lithologies derived from 3D digital core analysis
Annual Logging Symposium of the Society of Petrophysicists & Well Log Analysts (SPWLA 2007) ?, ?(2007) paper UU:1-16

Sok R, Arns C, Knackstedt M, Senden T, Sheppard A, Averdunk H, Pinczewski W, Okabe H
Estimation of Petrophysical Parameters from 3D images of Carbonate Core
Middle East Regional SPWLA Symposium: Petrophysics and Brown Field Resource Optimization ?, ?(2007) 15

Knackstedt M, Arns C, Ghous A, Sakellariou A, Senden T, Sheppard A, Sok R, Averdunk H, Pinczewski W, Padhy G, Ioannidis M
3D imaging and flow characterization of the pore space of carbonate care samples
International Symposium of the Society of Core Analysts 2006 ?, ?(2006) 13

Knackstedt M, Arns C, Ghous A, Sakellariou A, Senden T, Sheppard A, Sok R, Nguyen V, Pinczewski W
3D imaging and characterization of the pore space of carbonate core: implications to single and two phase flow properties
Annual Logging Symposium of the Society of Petrophysicists & Well Log Analysts (SPWLA 2006) ?, ?(2006)

Olafuyi A, Sheppard A, Arns C, Sok R, Cinar Y, Knackstedt M, Pinczewski W
Experimental Investigation of Drainage Capillary Pressure Computed from Digitized Tomographic Images
SPE/DOE Symposium on Improved Oil Recovery 2(2006) 7

Sheppard A, Sok R, Averdunk H, Robins V, Ghous A
Analysis of Rock Microstructure using High-resolution X-ray Tomography
International Symposium of the Society of Core Analysts 2006 ?, ?(2006) SCA2006-26-1-12

Arns C, Sheppard A, Sok R, Knackstedt M
NMR Petrophysical Predictions on Digitized Core Images
Society of Petrophysicists and Well Log Analysts Annual Symposium 2005 ?, ?(2005) MMM1-16

Bauget F, Turner M, Arns C, Saadatfar M, Sheppard A, Sok R, Knackstedt M
Rock Typing and Petrophysical property estimation via direct analysis on microtomographic images
International Symposium of the Society of Core Analysts 2005 ?, ?(2005) 1-12

Bauget F, Turner M, Arns C, Saadatfar M, Sheppard A, Sok R, Knackstedt M
Towards modelling regolith permeability with high resolution X-ray tomography
International Petroleum Conference and Exhibition (Petrotech-2005) ?, ?(2005)

Ghous A, Bauget F, Arns C, Sakellariou A, Senden T, Sheppard A, Sok R, Pinczewski W, Harris R, Beck G, Knackstedt M
Resistivity and Permeability Anisotropy Measured in Laminated Sands via Digital Core Analysis
Society of Petrophysicists and Well Log Analysts Annual Symposium 2005 ?, ?(2005) VVV1-14

Saadatfar M, Turner M, Arns C, Averdunk H, Senden T, Sheppard A, Sok R, Pinczewski W, Kelly J, Knackstedt M
Rock Fabric and Texture from Digital Core Analysis
Society of Petrophysicists and Well Log Analysts Annual Symposium 2005 ?, ?(2005) ZZ1-16

Arns C, Averdunk H, Bauget F, Sakellariou A, Senden T, Sheppard A, Sok R, Pinczewski W, Knackstedt M
Digital core laboratory: Analysis of reservoir core fragments from 3D images
SPWLA 45th Annual Logging Symposium 2004 (2004)

Jones A, Knackstedt M, Sheppard A, Sok R, Hutmacher D, Arns C, Sakellariou A, Senden T, Brandwood A, Milthorpe B, Jones A
Morphological Examination of Complex Microstructure via micro-CT imaging
World Biomaterials Congress 2004 ?, ?(2004)

Knackstedt M, Arns C, Limaye A, Sakellariou A, Senden T, Sheppard A, Sok R, Pinczewski W, Bunn G
Digital Core Laboratory: Properties of reservoir core derived from 3D images
SPE Asia Pacific Conference on Integrated Modelling for Asset Management 204 ?, ?(2004) SPE 87009/1-14

Turner M, Arns C, Sakellariou A, Senden T, Sheppard A, Sok R, Limaye A, Knackstedt M
Obtaining hydraulic properties of unconsolidated porous material
CRC LEME Regional Regolith Symposia 2004 ?, ?(2004) 370-4

Sakellariou A, Sawkins T, Senden T, Arns C, Limaye A, Oren P, Sheppard A, Sok R, Knackstedt M, Pinczewski W, Inge Berge L
Micro-CT Facility for Imaging Reservoir Rocks at Pore Scales
International Exposition and Annual Meeting of the Society for the Exploration Geophysicists 2003 ?, ?(2003) 1-4

Turner M, Sakellariou A, Arns C, Sok R, Limaye A, Senden T, Knackstedt M
Towards modelling regolith permeability with high resolution X-ray tomography
CRC LEME Regional Regolith Symposia 2003 ?, ?(2003) 421-425

Arns J, Arns C, Sheppard A, Sok R, Knackstedt M, Pinczewski W
Relative permeability from tomographic images: effect of correlated heterogeneitygies
7th International Symposium on Reservoir Wettability ?, ?(2002)

(31 publications)

Conference written presentation

Knackstedt M, Arns C, Bauget F, Sakellariou A, Senden T, Sheppard A, Sok R
Quantitative transport properties of granular material calculated from Xray CT images
International Petroleum Conference and Exhibition (Petrotech-2005) ?, ?(2005)

Sakellariou A, Senden T, Sawkins T, Knackstedt M, Turner M, Jones A, Saadatfar M, Roberts R, Limaye A, Arns C, Sheppard A, Sok R
An x-ray tomography facility for quantitative prediction of mechanical and transport properties in geological, biological and synthetic systems
International Society for Optical Engineering Conference 2004 5535(2004)

Arns C, Sakellariou A, Senden T, Sheppard A, Sok R, Knackstedt M, Pinczewski W, Bunn G
Virtual Core Laboratory: Properties of Reservoir Rock Derived from X-ray CT Images
International Exposition and Annual Meeting of the Society for the Exploration Geophysicists 2003 ?, ?(2003) 1477-1480

Arns C, Sakellariou A, Sheppard A, Sok R, Pinczewski W, Knackstedt M
Virtual Core Laboratory: A Facility for Imaging and Modelling Petrophysical Properties of Sedimentary Rock
International Petroleum Conference and Exhibition (Petrotech-2003) ?, ?(2003) 1-11

(4 publications)

Journal short contribution (non refereed)

Arns C, Sheppard A, Sok R, Knackstedt M
NMR petrophysical predictions on digitized core images
Petrophysics 48, 3(2007) 202

(1 publications)