Karen Schou Pedersen
Managing Director, Ph. D

Publications

2020-

Pedersen, K.S., Christensen, P.L.,
CO2 Solubility in Brine Aquifers – Volumetric Considerations,
OTC-34849-MS, OTC Asia, Kuala Lumpur, February 27 – March 1, 2024.

Pedersen, K.S., Christensen, P.L., Azeem, J.,
Phase Behavior of Petroleum Reservoir Fluids,
3rd edition, Taylor & Francis, Boca Raton, US, 2024.

Pedersen, K.S., Christensen, P.L., Shaikh, J.A.,
Use of Critical Point in Equation of State Modeling for Reservoir Fluids,
SPE-216776-MS, ADIPEC, Abu Dhabi, October 2-5, 2023.

Pedersen, K.S., Shaikh, J.A., Christensen, P.L.,
Importance of Critical Point for the Phase Behavior of a Reservoir Fluid,
Fluid Phase Equilibria 573, 2023.

Vinhal, A., Azeem, J., Pedersen, K.S.,
Modeling of Compositional Grading in Heavy Oil Fields
SPE-205887-MS, 21-23 Dubai, UAE, September 21–23, 2021

Aoki, T., Furuta, T., Leekumjorn, S., Azeem, J.S., Pedersen, K.S, Alobeidli, A., Mogensen, K.,
A New Technique for Common EoS Model Development for Multiple Reservoir Fluids with Gas injection SPE-202923-MS, Adipec, Abu Dhabi, UAE, 9-12 November, 2020.

2010-2019
Boesen, R.R., Sørensen, H., Pedersen, K.S.,
Asphaltene Predictions Using Screening Methods and Equations of State
SPE 190401-MS, SPE EOR Conference at Oil and Gas West Asia, Muscat, Oman, 26-28 March, 2018.

Tybjerg, P., Pedersen, K.S., Krejbjerg, K.,
Reservoir Fluid Characterization Procedure for PC-SAFT Equation of State
SPE 187170-MS, SPE ATCE, San Antonio, Texas, 9-11 October 2017.

Meisingset, K.K., Pedersen, K.S.,
Joule-Thomson Coefficient from Well Test Analysis Data
SPE-181622-MS, SPE ATCE in Dubai, UAE, 26-28 September 2016.

Kumar, A., Gohary, M.E., Pedersen, K.S, Azeem, J.,
Gas Injection as an Enhanced Recovery Technique for Gas Condensates. A comparison of three Injection Gases
SPE 177778-MS, Adipec, Abu Dhabi, UAE, 9-12 November, 2015.

Pedersen, K.S., Hjermstad, H.P.,
Modeling of Compositional Variation with Depth for Five North Sea Reservoirs
SPE 175085-MS, SPE ATCE Houston, Tx, 28-30 September, 2015.

Hustad, O.S., Jia, N.J., Pedersen, K.S., Memon, A., Leekumjorn, S.,
High Pressure Data and Modeling Results for Phase Behavior and Asphaltene Onsets of GoM Oil Mixed with Nitrogen
SPE Reservoir Eval. Eng. 3, 2014, pp. 384-395.

Pedersen, K.S., Christensen, P.L., Azeem, J.,
Phase Behavior of Petroleum Reservoir Fluids
2nd edition, Taylor & Francis, Boca Raton, US, 2014.

Boesen, R.R., Sørensen, H., Pedersen, K.S.,
New Approach for Hydrate Flash Calculations
Proceedings of the 8th International Conference on Gas Hydrates (ICGH8-2014), Beijing, 28 July – 1 August, 2014.

Lindeloff, N.L., Mogensen, K., Pedersen, K.S., Tybjerg, P., Noman, R.,
Investigation of Miscibility Behavior of CO2 rich Hydrocarbon Systems – With Application for Gas Injection EOR
SPE 166270-MS, SPE ATCE, New Orleans, LA, USA, 30 September – 2 October, 2013.

Sørensen, H., Pedersen, K.S., Christensen, P.L.,
Method for Generating Shale Gas Fluid Composition from Depleted Sample
Presented at Fourth International Acid Gas Injection Symposium (AGIS IV), Calgary, 24-27 September, 2013.

Pedersen, K.S., Leekumjorn, S., Krejbjerg, K., Azeem, J.,
Modeling of EOR PVT data using PC-SAFT equation
SPE-162346-PP, Adipec, Abu Dhabi, UAE, 11-14 November, 2012.

Pedersen, K.S., Azeem, J., Rasmussen, C.P.,
1D asphaltene deposition simulator for reservoir fluids undergoing gas injection
SPE-155447-PP, SPE EOR Conference at Oil and Gas West Asia, Muscat, Oman, 16-18 April, 2012.

Sah, P., Gurdial,G., Pedersen, K.S., Izwan, H., Ramli, F.,
Equation-Of-State Modeling For Reservoir Fluid Samples Contaminated By Oil-Based Drilling Mud Using Contaminated Fluid PVT Data
SPE Reservoir Evaluation & Engineering, 15, 2012, pp. 139-149.

Larsen, J., Sørensen, H., Yang, T., Pedersen, K. S.,
EOS and Viscosity Modeling for a highly undersaturated Gulf of Mexico Reservoir Fluid
SPE-147075-PP, SPE ATCE, 30 October – 2 November, 2011, Denver, Co.

Sah, P., Pedersen, K. S., Shaikh, J.A.,
EOS Modelling, the First Step in Detailed EOR Potential Evaluation – A Case Study
SPE-144025, EORC, Kuala Lumpur, Malaysia, 19-21 July, 2011.

Hemmingsen, P.V., Burgass, R., Pedersen, K. S., Kinnari, K., Sørensen, H.,
Hydrate temperature depression of MEG solutions at concentration up to 60 wt%. Experimental data and simulation results
Fluid Phase Equilibria 307, 2011, pp. 175-179.

Negahban, S., Pedersen, K. S., Baisoni, M.A., Sah, P., Azeem, J.,
An EOS Model for a Middle East Reservoir Fluid with an Extensive EOR PVT Data Material
SPE-136530-PP, Adipec, Abu Dhabi, UAE, 1-4 November, 2010.

2000-2009
Sonne, J. and Pedersen, K.S.,
Simulation of Hydrate Growth in Steady State Flow Lines
BHR 14th International Conference on Multiphase Production Technology, Cannes, France, June 17 – 19, 2009.

Pedersen, K.S., Sørensen, C.H.,
PC-SAFT Equation of State Applied to Petroleum Reservoir Fluids
SPE-110483-PP, SPE ATCE, Anaheim. November 11-14, 2007.

Pedersen, K.S., Christensen, P.L.,
Fluid in Hydrocarbon Basins
Chapter in Reviews in Mineralogy & Geochemistry, Vol 65, Mineralogical Society of America Geochemical Society, 2007.

Lundstrøm, C., Michelsen, M.L., Kontogeorgis, G.M., Pedersen, K.S., Sørensen, H.,
Comparison of SRK and CPA Equations of State for Physical Properties of Water and Methanol
Fluid Phase Equilibria 247, 206, pp. 149-157.

Pedersen, K.S., Hjermstad, H.P.,
Modeling of Large Hydrocarbon Compositional Gradient
SPE 101275, Adipec, Abu Dhabi, UAE, 5-8 November, 2006.

Pedersen, K.S., Christensen, P.L.,
Phase Behavior of Petroleum Reservoir Fluids
Taylor & Francis, Boca Raton, US, 2006.

Krejbjerg, K., Pedersen, K.S.,
Controlling VLLE Equilibrium with a Cubic EoS in Heavy Oil Modeling
57th Annual Technical Meeting of the Petroleum Society (Canadian International Petroleum Conference), Calgary, Canada, June 13-15, 2006.

Lindeloff, N., Pedersen, K.S., Rønningsen, H. P., Milter, J.,
The Corresponding States Viscosity Model Applied to Heavy Oil Systems
Journal of Canadian Petroleum Technology 43, 2004, pp. 47 – 53.

Pedersen, K.S., Milter, J.,
Phase Equilibrium Between Gas Condensate and Brine at HT/HP Conditions
SPE 90309, SPE ATCE, Houston, TX, September 26-29, 2004.

Pedersen, K.S., Milter J., Sørensen, H.,
Cubic Equations of State Applied to HT/HP and Highly Aromatic Fluids
SPE Journal 9, 2004, pp. 186-192.

Pedersen, K.S., Rønningsen, H.P.,
Influence of Wax Inhibitors on Wax Temperature, Pour Point, and Viscosity of Waxy Crude Oils
Energy and Fuels 17, 2003, pp. 321-328.

Pedersen, K.S., Lindeloff, N.,
Simulations of Compositional Gradients in Hydrocarbon Reservoirs under the Influence of a Temperature Gradient
SPE 84364, SPE ATCE, Denver, Co. Oct. 5 – 8, 2003.

Sørensen, H., Pedersen, K.S., Christensen, P.L.,
Modeling of Gas Solubility in Brine
Organic Geochemistry 33, 2002, pp. 635-642.

Rasmussen, C.P., Pedersen, K.S.,
Challenges in Modeling of Gas Hydrate Phase Equilibria
4th International Conference on Gas Hydrates, Yokohama, May 19-23, 2002.

Pedersen, K.S., Milter J., Rasmussen, C.P.,
Mutual Solubility of Water and a Reservoir Fluid at High Temperatures and Pressures. Experimental and Simulated data
Fluid Phase Equilibria 189, 2001, pp. 85-97.

Pedersen, K.S., Rønningsen, H.P.,
Effect of Precipitated Wax on Viscosity – a Model for Predicting the non-Newtonian Viscosity of Crude Oils
Energy and Fuels 14, 2000, pp. 43-51.

Madsen, J., Pedersen, K. S., Michelsen, M.L.,
Modeling of Structure H Hydrates using a Langmuir Adsorption Model
Ind. Eng. Chem. Res. 39, 2000, pp. 1111-1114.

1990-1999
Aplin, A.C., Macleod, G., Larter, S.R., Pedersen, K.S., Sørensen, H., Booth, T.,
Combined Use of Confocal Laser Scanning Microscopy and PVT Simulation for Estimating the Composition and Physical Properties of Petroleum in Fluid inclusions
Marine and Petroleum Geology 16, 1999, pp. 97-110.’

Rydahl, A., Pedersen, K.S., Hjermstad, H.P.,
Modelling of Live Oil Asphaltene Precipitation
AIChE Spring National Meeting, March 9-13, 1997, Houston, Tx, USA.

Rønningsen, H.P., Pedersen, K.S., Sømme, B.,
An Improved Thermodynamic Model for Wax Precipitation: Experimental Foundation and Application
Multiphase 97 Conference, June 18-20, 1997, Cannes, France.

Pedersen, K.S., Michelsen, M.L., Fredheim, A.O.,
Phase Equilibrium Calculations for Unprocessed Well Streams Containing Hydrate Inhibitors
Fluid Phase Equilibria 126, 1996, pp. 13-28.

Pedersen, K.S., Michelsen, M.L.,
Letter to the editor, AIChE J. May 1996 about Galeana et al., Thermodynamics of Wax Precipitation in Petroleum Mixtures,
AIChE J 42, 1996, pp. 238-242.

Pedersen, K.S.,
Prediction of Cloud Point Temperatures and Amount of Wax Precipitation
SPE Production & Facilities, February 1995, pp. 46-49.

Kristensen, J.N., Christensen, P.L., Pedersen, K.S., Skovborg, P.,
A Combined Soave-Redlich-Kwong and NRTL Equation of State for Calculating the Distribution of Methanol between Water and Hydrocarbon Phases,
Fluid Phase Equilibria 82, 1993, pp. 199-206.

Pedersen, K.S., Blilie, A.L., Meisingset, K.K.,
PVT-Calculations on Petroleum Reservoir Fluids Using Measured and Estimated Compositional Data for the Plus-Fraction
Ind. Eng. Chem. Res. 31, 1992, pp. 1378-1384.

Guo, T. M., Du, L.G., Pedersen, K.S., Fredenslund, Aa.,
Application of the Du-Guo and SRK Equations of State to Predict the Phase Behavior of Chinese Reservoir Fluids
SPE Reservoir Engineering, August 1991, pp. 379-388.

Pedersen, K.S., Skovborg, P., Rønningsen, H.P.,
Wax Precipitation from North Sea Crude Oils. 4. Thermodynamic Modeling
Energy and Fuels 5, 1991, pp. 924-932.

1980-1989
Pedersen, K.S., Fredenslund, Aa., Thomassen, P.,
Properties of Oils and Natural Gases
Gulf Publishing Inc., Houston, 1989.

Pedersen, K.S., Thomassen, P., Fredenslund, Aa.,
Characterization of Gas Condensate Mixtures
Advances in Thermodynamics 1, 1989, pp. 137-152.

Pedersen, K.S., Lund, T., Fredenslund, Aa.,
Surface Tension of Petroleum Mixtures
Journal of Canadian Petroleum Technology 28, 1989, pp. 118-123.

Pedersen, K.S., Thomassen, P., Fredenslund, Aa.,
On the Dangers of Tuning Equations of State Parameters
Chem. Eng. Sci. 43, 1988, pp. 269-278.

Hansen, J.H., Rønningsen, H.P., Pedersen, K.S., Fredenslund, Aa.,
A Thermodynamic Model for Predicting Wax Formation in Crude Oils
AIChE Journal 34, 1988, pp. 1937-1942.

Pedersen, K.S., Fredenslund, Aa.,
An Improved Corresponding States Model for the Prediction of Oil and Gas Viscosities and Thermal Conductivities
Chem. Eng. Sci. 42, 1987, pp. 182-186.

Pedersen, K.S., Fjellerup, J., Thomassen, P., Fredenslund, Aa.,
Studies of Gas Injection into Oil Reservoirs by a Cell-to-Cell Simulation Model
SPE 15599, SPE ATCE, New Orleans, LA, October 5-8, 1986.

Pedersen, K.S., Thomassen, P., Fredenslund, Aa.,
Thermodynamics of Petroleum Mixtures Containing Heavy Hydrocarbons. 3. Efficient Flash Calculation Procedures Using the SRK Equation of State
Ind. Eng. Chem. Process Des. Dev. 24, 1985, pp. 948-954.

Pedersen, K.S., Fredenslund, Aa., Christensen, P.L., Thomassen, P.,
Viscosity of Crude Oil
Chem. Eng. Sci. 39, 1984, pp. 1011-1016.

Pedersen, K.S., Thomassen, P., Fredenslund, Aa.,
Thermodynamics of Petroleum Mixtures Containing Heavy Hydrocarbons. 1. Phase Envelope Calculations by Use of the Soave-Redlich-Kwong Equation of State,
Ind. Eng. Chem. Process Des. Dev. 23, 1984, pp. 163-170.

Pedersen, K.S., Thomassen, P., Fredenslund, Aa.,
Thermodynamics of Petroleum Mixtures Containing Heavy Hydrocarbons. 2. Flash and PVT Calculations with the SRK Equation of State
Ind. Eng. Chem. Process Des. Dev. 23, 1984, pp. 566-573.

Pedersen, K.S., Thomassen, P., Fredenslund, Aa.,
SRK-EOS Calculation for Crude Oils
Fluid Phase Equilibria 14, 1983, pp. 209-218.

Pedersen, K.S., Cowley, R.A.,
Neutron scattering from liquid mixtures of 3He and 4He
Journal of Physics C: Solid State Physics 16, 1983, pp. 2671-2678.

Pedersen, K.S., Carneiro, K., Hansen, F.Y.,
Dynamics of liquid N2 studied by neutron inelastic scattering
Physical Review A 25, 1982, pp. 3335-3349.

Pedersen, K.S., Carneiro, K.,
Collective excitations of normal liquid 4He, at 3.1 K, studied by neutron inelastic scattering
Phys. Rev. B 22, 1980, pp. 19-14.

Publications

Pedersen, K.S., Christensen, P.L.,
CO2 Solubility in Brine Aquifers – Volumetric Considerations,
OTC-34849-MS, OTC Asia, Kuala Lumpur, February 27 – March 1, 2024.

Pedersen, K.S., Christensen, P.L., Azeem, J.,
Phase Behavior of Petroleum Reservoir Fluids,
3rd edition, Taylor & Francis, Boca Raton, US, 2024.

Pedersen, K.S., Christensen, P.L., Shaikh, J.A.,
Use of Critical Point in Equation of State Modeling for Reservoir Fluids,
SPE-216776-MS, ADIPEC, Abu Dhabi, October 2-5, 2023.

Pedersen, K.S., Shaikh, J.A., Christensen, P.L.,
Importance of Critical Point for the Phase Behavior of a Reservoir Fluid,
Fluid Phase Equilibria 573, 2023.

Pedersen, K.S., Christensen, P.L., Azeem, J.
Phase Behavior of Petroleum Reservoir Fluids, 2nd edition
Taylor & Francis, Boca Raton, US, 2014

Sørensen, H., Pedersen, K.S., Christensen, P.L.
Method for Generating Shale Gas Fluid Composition from Depleted Sample
Presented at Forth International Acid Gas Injection Symposium (AGIS IV), Calgary, September 24 – 27, 2013

Pedersen, K.S., Christensen, P.L.
Fluid in Hydrocarbon Basins
Chapter in Reviews in Mineralogy & Geochemistry, Vol 65, Mineralogical Society of America Geochemical Society, 2007.

Pedersen, K.S., Christensen, P.L.
Phase Behavior of Petroleum Reservoir Fluids
Taylor & Francis, Boca Raton, US, 2006.

Sørensen, H., Pedersen, K.S., Christensen, P.L.
Modeling of Gas Solubility in Brine
Organic Geochemistry 33, 2002, pp. 635-642

Christensen, P.L.
Regression to Experimental PVT data
Journal of Canadian Petroleum Technology, 38, 1999, pp. 1-9

Kristensen J.N., Christensen, P.L., Pedersen, K.S., and Skovborg, P.,
A Combined Soave-Redlich-Kwong and NRTL Equation of State for Calculating the Distribution of Methanol between Water and Hydrocarbon Phases
Fluid Phase Equilibria 82, 1993, pp. 199-206

Christensen, P.L., Nielsen, J., Kann, T.
Methods to Produce Calibration Mixtures for Anesthetic Gas Monitors and how to Perform Volumetric Calculations on Anesthetic Gases
Journal of Clinical Monitoring 8, No 4, 1992 pp 279-284

Pedersen, K.S., Fredenslund, Aa., Christensen, P.L., Thomassen, P.
Viscosity of Crude Oil
Chem. Eng. Sci. 39, 1984, pp. 1011-1016.

Christensen, P.L. and Fredenslund, Aa.
A Corresponding State Model for The Thermal Conductivity of Gases and Liquids
Chemical Engineering Science 35, 1980, pp 871-875

Christensen, P.L. and Fredenslund, Aa.
Thermal Conductivity of Gaseous Mixtures of Methane with Nitrogen and Carbon Dioxide
Journal of Chemical & Engineering Data 24, 1979, No. 4, pp 281-283