MENY

Selected papers

The Increased oil recovery researchers at the University of Stavanger and IRIS have produced a consistently high volume of quality papers into a variety of IOR research topics in recent years. Here is a selection:

Pore scale, sub-micron scale (nano scale)

A. Hiorth, E. Jettestuen, C. M. Lawrence, M. V. Madland “Precipitation, dissolution, and ion exchange processes coupled with a lattice Boltzmann advection diffusion solver”Geochimica et Cosmochimica Acta 10.1016/j.gca.2012.11.019 (2012).

Papatzacos, Paul Georg “The Helmholtz free energy of pure substances and fluid mixtures”. 8th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics; 2011-07-11 - 2011-07-13.

A. Hiorth, E. Jettestuen, L. M. Cathles, R. I. Korsnes, M. V. Madland, “A fully coupled geochemical model with a pore scale lattice Boltzmann simulator-principles and first results” Rev. Proc. Society of Core Analysts A43 (2010).

Papatzacos, Paul.  A Model for Multiphase and Multicomponent Flow in Porous Media, Built on the Diffuse-Interface Formalism. EUROMECH, Colloquium 499; 2008-06-09 - 2008-06-12.

A. Hiorth, S. Evje, S. M. Skjæveland, “A lattice Boltzmann-BGK algorithm for a diffusion equation with Robin boundary condition - application to NMR relaxation” Int. J. Numer. Meth. Fluids. 59, 405-421 (2009).

U. H. a Lad, A. Hiorth, J. Kolnes, O. K. Siqveland, and S. M. Skjæveland, ”Revisiting two phase NMR data with a new inversion routine using a triangular pores model for wettability estimation” Rev. Proc. Society of Core Analysts 29 (2009).

A. Hiorth, U. H. Lad, J. Finjord, and S. M. Skjæveland ”Magnetic signal from geometries containing corners - analytical and random walk calculations” Mag. Reson. Img 25 (2007).

Papatzacos, Paul.  Macroscopic two-phase flow in porous media assuming the diffuse-interface model at pore level. Transport in Porous Media 2002 ;Volum 49.(2) s. 139-174Papatzacos, Paul; Skjæveland, Svein M.  Relative Permeability From Thermodynamics. SPE Journal 2004 s. 47-56

Helland, J.O. and Skjæveland, S.M.: ``Physically-Based Capillary Pressure Correlation for Mixed Wet Reservoirs From a Bundle of Tubes Model,'' SPE Journal, June 2006, 171-180.

Helland, J.O. and Skjæveland, S.M.: ``Three-phase mixed-wet capillary pressure curves from a bundle of triangular tubes model,'' J. Pet. Sci. Eng. 52, Issues 1--4, June 2006, 100-130.

Finjord, J., Hiorth, A., a Lad, U.H., and Skjaeveland, S.M.: ``NMR for Equilateral Triangular Geometry Under Conditions of Surface Relaxivity- Analytical and Random Walk Solution,'' Transport in Porous Media , 3 November 2006, 21 pp.

Helland, J.O. and Skjæveland, S.M.: ``Relationship between capillary pressure, saturation, and interfacial area from a model of mixed-wet triangular tubes,'' Water Resour. Res., Vol. 43, No. 12, (2007).

Darcy scale

S. Evje, A. Hiorth, M.V. Madland, R.I. Korsnes, A mathematical model relevant for weakening of chalk reservoirs due to chemical reactions, Networks and Heterogeneous Media, Vol 4 (4), pp. 755-788, 2009.

P.Ø. Andersen, S. Evje, M.V. Madland, A. Hiorth, "A geochemical model for interpretation of chalk core flooding experiments" Chem. Eng. Sci., 84, pp. 218, 2012.

P.Ø. Andersen and S. Evje, A Mathematical Model for Interpretation of Brine-Dependent Spontaneous Imbibition Experiments. Proceedings of ECMOR XIII, Biarritz, France, 10-13 September 2012.

Papers on Improvements of SCAL methods
S.F. Shariatpanahi, S. Strand, T. Austad, and H. Aksulu. Wettability restoration of a limestone oil reservoir using completely water-wet cores from aqueous zone. Petroleum Science and Technology. (2011).

S.F. Shariatpanahi, S. Strand, and T. Austad. Initial wetting properties of carbonate oil reservoirs: Effect of the temperature and presence of sulfate in formation water. Energy & Fuels, 25. (2011).

R.R. Ravari, S. Strand, and T. Austad. Combined surfactant-enhanced gravity drainage (SEGD) of oil and the wettability alteration in carbonates: The effect of rock permeability and interfacial tension (IFT). Energy & Fuels, 25. (2011).

S.J. Fathi, T. Austad, and S. Strand. Water-based EOR by "Smart Water": Optimal ionic composition for enhanced oil recovery in carbonates. Energy & Fuels. (2011).

S.J. Fathi, T. Austad, and S. Strand. Effect of water-extractable carboxylic acids in crude oil on wettability in carbonates. Energy & Fuels, 25. (2011).

S.F. Shariatpanahi, S. Strand, and T. Austad. Evaluation of water-based enhanced oil recovery (EOR) by wettability alteration in a low- permeable fractured limestone oil reservoir.  Energy & Fuels, 24. (2010).

S.J. Fathi, T. Austad, S. Strand, and T. Puntervold. Wettability alteration in carbonates: The effect of water-soluble carboxylic acids in crude oil. Energy & Fuels, 24. (2010).

S.J. Fathi, T. Austad, and S. Strand. "Smart Water" as wettability modifier in chalk: The effect of salinity and ionic composition. Energy & Fuels, 24. (2010).

T. Puntervold, S. Strand, and T. Austad. Co-injection of seawater and produced water to improve oil recovery from fractured North Sea chalk oil reservoirs. Energy & Fuels, 23. (2009).

S. Strand, T. Puntervold, and T. Austad. Effect of temperature on enhanced oil recovery from mixed-wet chalk cores by spontaneous imbibition and forced displacement using seawater. Energy & Fuels, 22. (2008).

S. Strand, T. Austad, T. Puntervold, E.J. Høgnesen, M. Olsen, and S.M.F. Barstad. "Smart water" for oil recovery from fractured limestone - A preliminary study. Energy & Fuels, 22. (2008).

T. Puntervold and T. Austad. Injection of seawater and mixtures with produced water into North Sea chalk formation: Impact of fluid-rock interactions on wettability and scale formation. J. Pet. Sci. Eng., 63. (2008).

T. Austad, S. Strand, M.V. Madland, T. Puntervold, and R.I. Korsnes. Seawater in chalk: An EOR and compaction fluid. SPE Reservoir Evaluation & Engineering, 11. (2008).

P. Zhang, M.T. Tweheyo, and T. Austad. Wettability alteration and improved oil recovery by spontaneous imbibition of seawater into chalk: Impact of the potential determining ions: Ca2+, Mg2+ and SO42-. Coll. and Surf. A: Physicochem. Eng. Aspects, 301. (2007).

S. Strand, M.L. Hjuler, R. Torsvik, J.I. Pedersen, M.V. Madland, and T. Austad. Wettability of chalk: Impact of silica, clay content, and mechanical properties. Pet. Geo., 13. (2007).

T. Puntervold, S. Strand, and T. Austad. New method to prepare outcrop chalk cores for wettability and oil recovery studies at low initial water saturation. Energy & Fuels 21. (2007).

T. Puntervold, S. Strand, and T. Austad. Water flooding of carbonate reservoirs: Effects of a model base and natural crude oil bases on chalk wettability. Energy & Fuels, 21. (2007).

P. Zhang, M.T. Tweheyo, and T. Austad. Wettability alteration and improved oil recovery in chalk: The effect of calcium in the presence of sulfate. Energy & Fuels, 20. (2006).

P. Zhang and T. Austad Wettability and oil recovery from carbonates: Effects of temperature and potential determining ions.. Coll. and Surf. A: Physicochem. Eng. Aspects, 279. (2006).

S. Strand, D.C. Standnes, and T. Austad. New wettability test for chalk based on chromatographic separation of SCN- and SO42-. (J. Pet. Sci. Eng., 52. 2006).

S. Strand, E.J. Høgnesen, and T. Austad. Wettability alteration of carbonates - Effects of potential determining ions (Ca2+ and SO42-) and temperature. Coll. and Surf. A: Physicochem. Eng. Aspects, 275. (2006).

S. Strand, D.C. Standnes, and T. Austad. Spontaneous imbibition of aqueous surfactant solutions into neutral to oil-wet carbonate cores: Effects of brine salinity and composition. Energy & Fuels, 17. (2003).

D.C. Standnes and T. Austad. Nontoxic low-cost amines as wettability alteration chemicals in carbonates. J. Pet. Sci. Eng., 39. (2003).

D.C. Standnes and T. Austad. Wettability alteration in carbonates - Interaction between cationic surfactant and carboxylates as a key factor in wettability alteration from oil-wet to water-wet conditions. Coll. and Surf. A: Physicochem. Eng. Aspects, 216. (2003).

T. Austad and D.C. Standnes. Spontaneous imbibition of water into oil-wet carbonates. J. Pet. Sci. Eng., 39. (2003).

D.C. Standnes, L.A.D. Nogaret, H.-L. Chen, and T. Austad. An evaluation of spontaneous imbibition of water into oil-wet carbonate reservoir cores using a nonionic and a cationic surfactant. Energy & Fuels, 16. (2002).

D.C. Standnes and T. Austad. Wettability alteration in chalk. 2. Mechanism for wettability alteration from oil-wet to water- wet using surfactants. J. Pet. Sci. Eng., 28. (2000).

D.C. Standnes and T. Austad. Wettability alteration in chalk. 1. Preparation of core material and oil properties. J. Pet. Sci. Eng. 28. (2000).

T. Austad, B. Matre, J. Milter, A. Saevareid, and L. Oyno. Chemical flooding of oil reservoirs 8. Spontaneous oil expulsion from oil- and water-wet low permeable chalk material by imbibition of aqueous surfactant solutions. Coll. and Surf. A: Physicochem. Eng. Aspects, 137. (1998).

J. Milter and I.E.I. Øxnevad. Spontaneous imbibition in two different chalk facies. Pet. Geo., 2. (1996).

J. Milter and T. Austad. Chemical flooding of oil reservoirs. 7. Oil expulsion by spontaneous imbibition of brine with and without surfactant in mixed-wet, low permeable chalk material. Coll. and Surf. A: Physicochem. Eng. Aspects, 117. (1996).

J. Milter and T. Austad. Chemical flooding of oil reservoirs. 6. Evaluation of the mechanism for oil expulsion by spontaneous imbibition of brine with and without surfactant in water-wet, low permeable, chalk material. Coll. and Surf. A: Physicochem. Eng. Aspects, 113 (1996).

S. Evje and A. Hiorth. “A model for interpretation of brine-dependent spontaneous imbibition experiments”. Adv. Wat. Res. 34, 1627-1642 (2011).

S. Evje and A. Hiorth. “A mathematical model for dynamic wettability alteration controlled by water-rock chemistry” Netw. Heter. Media 5, 217 (2010).

A. Hiorth, L. M. Cathles, M. V. Madland “The impact of pore water chemistry on carbonate surface charge and oil wettability” Trans. Porous Med. 85, 1-21 (2010).

S. Evje, A. Hiorth, M. Madland, R. I. Korsnes “A Mathematical model relevant for weakening of chalk reservoirs due to chemical reactions” Networks and Heterogeneous Media 4, 755-788 (2009).

E. Omdal, M. V. Madland, T. G. Kristiansen, N. B. Nagel, R. I. Korsnes, A. Hiorth”Deformation Behavior of Chalk Studied Close to In Situ Reservoir Conditions” Rock Mech Rock Eng 43, 557-580 (2010).

Zangiabadi, B., Korsnes, R.I., Hildebrand-Habel, T., Hiorth, A. Sutarjana, A., Lian, A., and Madland, M.V.,“ Chemical Water Weakening of Various Outcrop Chalks at Elevated Temperature”. Presented at The Fourth Biot Conference on Poromechanics June 8-10, 2009.

Madland, M.V., Omdal, E., Breivik, H., Korsnes, R.I., Hiorth, A., Kristiansen, T.G.  “Investigation of the Effective Stress Relations for Outcrop Chalk”. Presented at The Fourth Biot Conference on Poromechanics June 8-10, 2009.

Omdal, E., Renli, R., Kristiansen, T.G., Korsnes, R.I., Hiorth, A., Madland, M.V.  ”Laboratory observations with implications for Depletion of Chalk Reservoirs”. Presented at The Fourth Biot Conference on Poromechanics June 8-10, 2009.

Zangiabadi, B., Madland, M.V. Hildebrand-Habel,T., Korsnes, R.I., Hiorth, A., Kristiansen, T.G. “Mechanical Properties of High and Lower Porosity Outcrop Chalk at Various Wetting States”. Presented at the 43rd US Rock Mechanics Symposium and 4th U.S.-Canada Rock Mechanics Symposium ARMA 09-139, Asheville, NC June 28th - July 1, 2009.

K. Kaster, A. Hiorth, G. Kjeilen-Eilertsen, C. Boccadoro, A. Lohne, H. Berland, A. Stavland, O. Brakstad”Mechanisms Involved in Microbially Enhanced Oil Recovery” Trans. Porous Med. 91 (2012).

Papatzacos, P., A Model for Multiphase and Multicomponent Flow in Porous Media, Built on the Diffuse-Interface Assumption. Transport in Porous Media, 2010. 82(3): p. 443-462.

Papatzacos, P. and S.M. Skjaeveland, Diffuse-interface modeling of two-phase flow for a one-component fluid in a porous medium. Transport in Porous Media, 2006. 65(2): p. 213-236.

Hermansen, H., Eliassen, Ø., Guo, Y., and Skjæveland, S.M.: ``Capillary Pressure From Centrifuge ---A New Direct Method,´´ paper presented at The Second European Core Analysis Symposium (Eurocas II), May 20--22, 1991 in London (refereed in Proceedings).

Longeron, D., Hammervold, W.L., and Skjaeveland, S.M.: ``Water-Oil Capillary Pressure and Wettability Measurements Using Micropore Membrane Technique,'' paper SPE 30006 presented at the 1995 SPE International Meeting on Petroleum Engineering, Beijing, Nov. 14--17.

Virnovsky, G.A., Vatne, K.O., Iversen, J.E., and Signy, C., 2004. Three-phase capillary pressure measurements in centrifuge at reservoir conditions, SCA2004-19, International Symposium of the Society of Core Analysts held in Abu Dhabi, UAE, 5-9 October, 2004

Hammervold, W.L., Knutsen, Ø., Iversen, J.E., and Skjæveland, S.M.: ``Capillary Pressure Scanning Curves by the Micropore Membrane Technique,'' paper presented at the 1996 International Symposium on Evaluation of Reservoir Wettability and Its Effect on Oil Recovery, Montpellier, France, Sept. 11--13.

Helset, H.M., Nordtvedt, J.E., Skjæveland, S.M., and Virnovsky, G.A.: ``Three-Phase Relative Permeabilities From Displacement Experiments With Full Account for Capillary Pressure,'' SPE Reservoir Evaluation & Engineering (April 1998) pp. 92--98.

Virnovsky, G.A. and Skjæveland, S.M.: ``Relative Permeability and Capillary Pressure Concurrently Determined From Steady-State Flow Experiments,´´ paper presented at the 1995 European Symposium on Improved Oil Recovery, Vienna, May 15--17.

Yu, L., Evje, S., Kleppe, H., Kårstad, T., Fjelde, I., Skjæveland, S.M.: "Spontaneous imbibition of seawater into preferentially oil-wet chalk cores - Experiments and simulations", Journal of Petroleum Science and Engineering 66 (2009) 171-179.

Dernaika, Moustafa R.; Kalam, Mohammed Z.; Basioni, Mahmoud A.; Skjæveland, Svein Magne. Hysteresis of Capillary Pressure, Resistivity Index and Relative Permeability in Different Carbonate Rock Types. Petrophysics 2012; Vol. 53. (5) Suppl. October pp 16.

Rock Mechanics & Rock Fluid Interactions
Madland, M.V., A. Finsnes, A. Alkafadgi, R. Risnes, and T. Austad, The influence of CO2 gas and carbonate water on the mechanical stability of chalk. Journal of Petroleum Science and Engineering, 2006. 51: p. 149-168.'

Korsnes, R.I., Chemical induced water weakening of chalk by fluid-rock interactions, PhD thesis, Petroleum Engineering. 2007, University of Stavanger.

Madland, M.V., Water weakening of Chalk - A mechanistic study, PhD thesis, Petroleum Engineering. 2005, University of Stavanger.

Heggheim, T., M.V. Madland, R. Risnes, and T. Austad, A chemical induced enhanced weakening of chalk by seawater. Journal of Petroleum Science and Engineering, 2005. 46: p. 171-184.

Korsnes, R.I., M.V. Madland, T. Austad, S. Haver, and G. Røsland, The effects of temperature on the water weakening of chalk by seawater, in SCA 2006. 2006: Trondheim, Norway.

Korsnes, R.I., M.V. Madland, and T. Austad, Impact of brine composition on the mechanical strength of chalk at high temperature, in 27th IEA Annual Workshop & Symposium on Enhanced Oil Recovery, IFP. 2006: Paris.

Korsnes, R.I., M.V. Madland, T. Austad, S. Haver, and G. Røsland, The effects of temperature on the water weakening of chalk by seawater. Journal of Petroleum Science and Engineering, 2008. 60: p. 183-193.

Madland, M.V., K. Midtgarden, R. Manafov, R.I. Korsnes, T.G. Kristiansen, and A. Hiorth. The effect of temperature and brine composition on the mechanical strength of Kansas chalk. in International Symposium of the Society of Core Analysts. 2008. Abu Dhabi, UAE.

Zangiabadi, B., R.I. Korsnes, T. Hildebrand-Habel, A. Hiorth, I.K. Surtarjana, A. Lian, and M.V. Madland. Chemical water weakening of various outcrop chalks at elevated temperature. in Poromechanics IV: The 4th Biot Conference on Poromechanics. 2009. New York City, U.S.A.: DEStech Publication, Inc.

Hiorth, A., L.M. Cathles, and M.V. Madland, The impact of pore water chemistry on carbonate surface charge and oil wettability. Transport in Porous Media, 2010: 21 pp.

Madland, M.V., E. Omdal, Megawati, T. Hildebrand-Habel, R.I. Korsnes, S. Evje, L.M. Cathles, and A. Hiorth, Chemical alterations induced by rock-fluid interactions when injecting brines in high porosity chalks. Transport in Porous Media, in press after minor revisions.

Cathles, L.M. EqAlt-Equilibrium Chemical Alteration. in Combined Physical and Chemical Geofluids Modeling. 2006. University of Windsor, Windsor, Ontario.

Evje, S., A. Hiorth, M.V. Madland, and R.I. Korsnes, A mathematical model relevant for weakening of chalk reservoirs due to chemical reactions. Networks and Heterogeneous Media, 2009. 4(4): p. 755-788.

Omdal, E., The mechanical behavior of chalk under laboratory conditions simulating reservoir operations, PhD thesis, Faculty of Science and Technology, Department of Petroleum Engineering. 2010, University of Stavanger.

The effect of acid stimulation on fractured chalk
Omdal, E., Dirdal, E., Ormark, K. Vorland, K.A.N., Korsnes, R.I., Kristiansen, T.G., Knutsen, T.L., Hildebrand-Habel, T., Madland, M.V., 2008. “Induced Geometry in Chalk during Hydrochloric Acid Stimulation”. In: Shao, J-F. and Burlion, N (Eds), Thermo-Hydromechanical and Chemical Coupling in  Geomaterials and Application. Proceedings of the 3rd International Symposium GeoProc’2008. Wiley, pp. 187-194, 2008.

Acid needle jetting system; an alternative to stimulation
Rune Freyer, Tron Kristiansen, Merete Vadla Madland, Edvard Omdal and Øyvind Omdal. SPE 121814 Multilateral system allowing 100 level 5 laterals drilled simultaneously. Presented at the 2009 SPE European Formation Damage Conference, Scheveningen, Netherland, 27-29 May 2009

The effect of CO2 flooding of chalk
Merete V. Madland , Anne Finsnes, Ali Alkafadgi, Rasmus Risnes, and Tor Austad. The influence of CO2 on the Mechanical Stability of Chalk. Journal of Petroleum Science and Engineering, 51 pp 149-168, 2006

Korsnes, R.I., Madland, M.V., Vorland, K.A.N, Hildebrand-Habel, T., Kristiansen, T.G., Hiorth, A., 2008. “ENHANCED CHEMICAL WEAKENING OF CHALK DUE TO INJECTION OF CO2 ENRICHED WATER”. International Symposium of the Society of Core Analysts, Abu Dhabi, UAE 29 October-2 November, 2008

Near wellbore stability;  Chalk weakening/regaining of mechanical strength

Torgrim T. Thingvoll, BP; Steve Heath, SPE, Clariant; Roar Flatebø, BP; Merete Madland, SPE, UIS; Graham Clark; SPE, and Catherine Strachan, SPE, Clariant; and Kim Andre Nesse Vorland and Reidar I. Korsnes. SPE 114090 Design and Field Deployment of Scale Inhibitors for Reducing the Risk for Chalk Influx Post Squeeze Treatments in Multiple Fractured Horizontal Wells in BP Valhall. 2008

Outcrop and reservoir rock characterization
IDENTIFYING POTENTIAL FOR HYDROCARBONS IN CARBONATES, SHALES AND SANDSTONES 
'Women in science' program, UiS

Lie, B.B., Fernandez Bulfa, E., Zimmermann, U., Bertolino, S.A.R., Madland, M.V., Tait, J. 2011. Environmental constraints for Late Cretaceous to Early Palaeocene chalk successions from the North Sea. Vinterkonferansen 2011, NGF Abstracts and Proceedings, 1, 60

Larsen, M., Zimmermann, U., Bertolino, S., Gustavsen, H., Utvik, C., Madland, M.V., Cooper, M., Mitchell, I., Tait, J., Caycedo, A. 2011 Chemostratigraphy, facies determination and mechanical properties of Upper Cretaceous chalk deposits in Northern Ireland. Vinterkonferansen 2011, NGF Abstracts and Proceedings

Morozova, V., Zimmermann, U., Bertolino, S., Madland, M.V., Tait, J., Hildebrand-Habel, T. 2011. Clay and carbonate mineralogy and chemistry of chalk from selected Late Cretaceous rocks. Vinterkonferansen 2011, NGF Abstracts and Proceedings, 1, 64-65
Immerstein, T., Mehus, T., Zimmermann, U., Bertolino, S.A.R., Madland, M.V., Tait, J. 2011.

Chemostratigraphy and geochemistry of Pliensbachian carbonate successions from northern Spain. Vinterkonferansen 2011, NGF Abstracts and Proceedings, 1, 43-44. Kverneland, K., Vindenes, K., Schmalholz, M., Zimmermann, U., Bertolino, S., Madland, M.V., Tait, J., Bechstaedt, T. 2011.

Chemostratigraphy and geochemistry of Lower to Middle Cambrian carbonates in northern Spain and its significance for the understanding of facies changes. Vinterkonferansen 2011, NGF Abstracts and Proceedings, 1, 55-56
Naidoo, T., Hatløy, S., Vigre, P., Zimmermann, U., Bertolino, S., Moczydlowska-Vidal, M., Madland, M.V., Vervoort, J. 2011.

Provenance, age and origin of Neoproterozoic successions of northern Spain (Cantabrian Mountains). Vinterkonferansen 2011, Norsk Geologisk Forening Abstracts and Proceedings, 1, 68.

Bråtveit, J., Liknes, V., Zimmermann, U., Madland, M.V., Bertolino, S.R.A. and Tait, J.A.: Provenance and hydrocarbon content of Neoproterozoic to Palaeozoic shales in northern Spain. To be presented at the 30th Nordic Winter meeting 2013

Skripnes Larsen, I., Støle, L., Øye, S., Zimmermann, U., Madland, M.V., Bertolino, S.R.A. and Moczydlowska-Vidal, M.: Provenance of the Precambrian-Lower Cambrian Herreria Formation in northern Spain. To be presented at the 30th Nordic Winter meeting 2013

Øye, S., Støle, L., Skripnes Larsen, Moczydlowska-Vidal, M., Zimmermann, U. and Madland, M.V.: Bio- and lithostratigraphy of the Precambrian-Lower Cambrian Herreria Formation in northern Spain. To be presented at the 30th Nordic Winter meeting 2013.

Skripnes Larsen, I., Støle, L., Øye, S., Zimmermann, U., Madland, M.V., Bertolino, S.R.A. and Moczydlowska-Vidal, M.: Provenance of the Precambrian-Lower Cambrian Herreria Formation in northern Spain; 30th Nordic Geological Winter Meeting, Reykjavik Iceland 9-12 January 2012, p 187.

Bråtveit, J., Liknes, V., Zimmermann, U., Madland, M.V., Bertolino, S.R.A. and Tait, J.A.: Provenance and hydrocarbon content of Neoproterozoic to Palaeozoic shales in northern Spain; 30th Nordic Geological Winter Meeting, Reykjavik Iceland 9-12 January 2012, p 166-167.

Wang, W., Zimmermann, U., Madland, M.V., Bertolino, S.R.A., Lie, B. V., Morosova, V. 2013 The search of on-shore equivalents for reservoir chalk in the North Sea: Rare Earth Elements, d13C and d18O isotopes as indicators?;  Norsk Geologisk Forening Vinterkonferansen 2013, Oslo 8.-10.1. 2013, p

Kallesten, E., Zimmermann, U., Madland, M.V.: High-resolution C-O stable isotope analyses on Pliensbachian belemnites from the Rodiles Formation (northern Spain);  Norsk Geologisk Forening Vinterkonferansen 2013, Oslo 8.-10.1. 2013, p

Minde, M. W., Zimmermann, U., Madland, M.V.: Chalk and chert of the Mattinata Formation (NE Apulia, Italy); Norsk Geologisk Forening Vinterkonferansen 2013, Oslo 8.-10.1. 2013, p

Sivertsen, N., Zimmermann, U., Madland, M.V.: Provenance, age and tectonic setting of the Lower Paleozoic Oville and San Pedro Formations (northern Spain);  Norsk Geologisk Forening Vinterkonferansen 2013, Oslo 8.-10.1. 2013, p

Støle, L., Zimmermann, U., Madland, M.V.: Provenance, age and tectonic setting of the Barrios Formation and Hirnantian glacial diamictites from northern Spain;  Norsk Geologisk Forening Vinterkonferansen 2013, Oslo 8.-10.1. 2013, p


Field scale
Larsen, Leif: "Wells Producing Commingled Zones With Unequal Initial Pressure and Reservoir Properties," paper SPE 10325 presented at the 1981 SPE Annual Technical Conference and Exhibition, San Antonio, Oct. 5-7. (Accepted for publication in Soc. Pet. Eng. J.)
Larsen, Leif: "A Simple Approach to Pressure Distributions in Geometric Shapes," Soc. Pet. Eng. J. (Feb. 1985) 113-120.

Bratvold, R.B. and Horne, R.N.: "Analysis of Pressure Falloff Tests Following Cold Water Injection," SPEFE (Sept. 1990) 293.

Bøe, A., Skjæveland, S.M. and Whitson, C.H.: ``Two-Phase Pressure Test Analysis,'' SPE Formation Evaluation (Dec. 1989) 604-611.

Larsen, Leif: "Productivity Computations for Multilateral, Branched and Other Generalized and Extended Well Concepts," paper SPE 36754 presented at the 1996 SPE Annual Technical Conference and Exhibition, Denver, Oct. 6-9.

Larsen, Leif: "Pressure-Transient Behavior of Multibranched Wells in Layered Reservoirs," SPERE (Feb. 2000) 68-73.

Larsen, L.: "Horizontal Fractures in Single and Multilayer Reservoirs” paper CSUG/SPE 147004 presented at the 2011 Canadian Unconventional Resources Conference, Calgary, Alberta, Canada, 15-17 November, 2011.

Other reservoir scale IOR processes
Ekrann, S. and Skjæveland, S.M.: ``Thin Oil Zones,´´ in Recent Advances in Improved Oil Recovery Methods for North Sea Sandstone Reservoirs S.M. Skjæveland and J. Kleppe (eds.), Norwegian Petroleum Directorate, Stavanger (1992) 305--309.
Virnovsky, G.A., Helset, H.M., and Skjaeveland, S.M.: ``Stability of Displacement Fronts in WAG Operations,'' SPE Journal (Dec. 1996) pp. 383--394. [For layered reservoirs].

Skjaeveland, S.M., Siqveland, L.M., Kjosavik, A., Hammervold, W.L., and Virnovsky, G.A.: ``Capillary Pressure Correlation for Mixed-Wet Reservoirs,'' SPE Reservoir Evaluation & Engineering (Feb. 2000) pp. 60--67.

Kjosavik, A., Ringen, J.K., and Skjaeveland, S.M.: ``Relative Permeability Correlation for Mixed-Wet Reservoirs,'' SPE Journal, March 2002.

Helland, J.O. and Skjæveland, S.M.: ``Three Phase Capillary Pressure Correlation for Mixed-wet Reservoirs,'' paper SPE 92057 presented at the 2004 International Petroleum Conference in Mexico, Puebla, Pue., Nov 7-9.

Langaas, K., Nilsen, K.I., and Skjaeveland, S.M.: ``Tidal Pressure Response and Surveillance of Water Encroachment,'' SPE Reservoir Evaluation & Engineering Vol. 9, No. 4, August 2006, 335--344.

Reservoir-well interaction:
Høyland, L.A., Papatzacos, P., and Skjæveland, S.M.: ``Critical Rate for Water Coning: Correlation and Analytical Solution,´´ SPE Reservoir Engineering (Nov. 1989) 495--503

Papatzacos, P., Herring, T., Martinsen, R., and Skjæveland, S.M.: ``Cone Breakthrough Time for Horizontal Wells,´´ SPE Reservoir Engineering (Aug. 1991) 311--318.

Larsen, Leif: "Productivity Computations for Multilateral, Branched and Other Generalized and Extended Well Concepts," paper SPE 36754 presented at the 1996 SPE Annual Technical Conference and Exhibition, Denver, Oct. 6-9.

A. Hiorth, Ø. Bache, E. Jettestuen, L. M. Cathles, R. W. Moe, E. Omdal, R. I. Korsnes, M. V. Madland, Rev. Proc. Society of Core Analysts 53 (2011) “A Simplified Approach to Translate Chemical Alteration in Core Experiments to Field Conditions”.

Ekrann, S. and J.O. Aasen, Steady-state upscaling. Transport in Porous Media, 2000. 41(3): p. 245-262.

Lohne, A. and G. Virnovsky, Three-Phase Upscaling in Capillary and Viscous Limit, in SPE/DOE Symposium on Improved Oil Recovery. 2006: Tulsa, Oklahoma, USA.

Lohne, A., G.A. Virnovsky, and L.J. Durlofsky, Two-Stage Upscaling of Two-Phase Flow: From Core Simulation Scale. SPE Journal, 2006. 11(3).

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Economic analyses
Osmundsen, P., Sørenes, T. and K. Teigen (2012), “Increased oil recovery from existing oil fields on the Norwegian Continental Shelf”, proceedings, International Association for Energy Economics (IAEE), Venezia, 9-12 September 2012.

Osmundsen, P. (2012), “Lower gas prices open window for improving oil recovery”, proceedings, International Association for Energy Economics (IAEE), Venezia, 9-12 September 2012.

Osmundsen, P. (2011), “Choice of Development Concept: Platform or Subsea? Implications for the Recovery Factor”, proceedings, 34th IAEE International Conference, Stockholm, 20-22 June, 2011.

Osmundsen, P., Teigen, K., og T. Sørenes (2011), “Oil Companies Decision Criteria: Consequences for Improved Recovery from Existing Oil Fields”, proceedings, 34th IAEE International Conference, Stockholm, 20-22 June, 2011.

Osmundsen, P., K.H. Roll and R. Tveterås (2012), "Drilling speed - the relevance of experience", Energy Economics 34, 786-794.

Osmundsen, P., Skjerpen, T. and K.E. Rosendahl (2012), “Understanding rig rates”, proceedings, International Association for Energy Economics (IAEE), Venezia, 9-12 September 2012.

Osmundsen, P., T. Sørenes, and A. Toft (2010), “Offshore Oil Service Contracts - New Incentive Schemes to Promote Drilling Efficiency”, Journal of Petroleum Science and Engineering 72, 220-228.

Osmundsen, P., Roll, K., and R. Tveterås (2010), “Exploration Drilling Productivity at the Norwegian Shelf”, Journal of Petroleum Science and Engineering, 73, 122-128.

Osmundsen, P., Aven, T. and A. Tomasgard (2010), “On Incentives for Assurance of Petroleum Supply”, Reliability Engineering & System Safety, Volume 95, Issue 2, February 2010, Pages 143-148.

Osmundsen, P. (2009), ’Incentives for Drilling Contractors’, Exploration & Production, Oil & Gas Review 7, 1, 73-75.

Osmundsen, P., T. Sørenes, and A. Toft (2008), ’Drilling Contracts and Incentives’, Energy Policy 36, 8, 3138-3144.
Mohn, K. og P. Osmundsen (2008), “Exploration economics in a regulated petroleum province: The case of the Norwegian Continental Shelf”, Energy Economics, 30, 2, 303-320.

Osmundsen, P., Aven, T. and J.E. Vinnem (2008), “Safety, Economic Incentives and Insurance”, Reliability Engineering & System Safety 93, 1, 137-143.

Osmundsen, P., Toft, A., and K.A. Dragvik (2006), ”Design of Drilling Contracts – Economic Incentives and Safety Issues”, Energy Policy 34, 2324-2329.

Osmundsen, P. (2010), “Time Consistency in Petroleum Taxation – Lessons from Norway”, in Daniel, P., Keen, M. and C. McPherson, eds., (2010), The Taxation of Petroleum and Minerals: Principles, Problems and Practice, Routledge, joint with the International Monetary Fund, April, 2010, ISBN: 978-0-41578-138-1; pg. 425-444.