PUBLIKASJONER - Publications


Jon Steinar Gudmundsson

 

COINCIDENTAL MATCH OF NUMERICAL SIMULATION AND PHYSICS
B. Pierre & J.S. Gudmundsson
25th IAHR Symposium on Hydraulic Machinery and Systems, September 20-24, Timisoara (Romania)

IMPULSE PUMPING MODELLING AND SIMULATION
B. Pierre & J.S. Gudmundsson
25th IAHR Symposium on Hydraulic Machinery and Systems, September 20-24, Timisoara (Romania)

ARTIFICIAL LIFT USING IMPULSE PUMPING
B. Pierre & J.S. Gudmundsson
SPE Annual Technical Conference and Exhibition, Septermber 19-22, 2010, Florence

WATER HAMMER IN OFF-LOADING SYSTEMS: CONTRIBUTION OF DETAILED MODELLING TO DESIGN AND SAFETY
B. Pierre & J.S. Gudmundsson
SPE Annual Technical Conference and Exhibition, Septermber 19-22, 2010, Florence

PUMPING OF FLUIDS USING PRESSURE IMPULSES
B. Pierre & J.S. Gudmundsson
SPE EUROPEC/EAGE Annual Conference and Exhibitio, June 8-11, 2009, Amsterdam.

 

MODELLING OF PRESSURE WAVE PROPAGATION IN PIPELINES: STEADY-STATE AND TRANSIENT FRICTION
B. Pierre & J.S. Gudmundsson
MekIT'09, Fifth National Conference on Computational Mechanics, May 26-27, 2009, Trondheim.

HYDRATE NON-PIPELINE TECHNOLOGY FOR TRANSPORT OF NATURAL GAS
J.S. Gudmundsson & O.F. Graff
22nd World Gas Conference, June 1-5, 2003, Tokyo

FRACTURE ROUGHNESS CHARACTERIZATION BY SHADOW IMAGE ANALYSIS
T. Kløv, E. Skjetne & J.S. Gudmundsson
International Journal of Fracture, Vol. 117, 2002, 85-100a href="http://www.ipt.ntnu.no/~jsg/publikasjoner/papers2002/YokohamaNonPipeline.pdf">HYDRATE NON-PIPELINE TECHNOLOGY

J.S. Gudmundsson, M. Mørk & O.F. Graff
4th International Conference on Gas Hydrates, May 19-23 2002, Yokohama.

COLD FLOW HYDRATE TECHNOLOGY
J.S. Gudmundsson
4th International Conference on Gas Hydrates, May 19-23 2002, Yokohama.

HYDRATE FORMATION RATE IN A CONTINUOUS STIRRED TANK REACTOR: EXPERIMENTAL RESULTS AND BUBBLE-TO-CTRYSTAL MODEL
M. Mørk & J.S. Gudmundsson
4th International Conference on Gas Hydrates, May 19-23 2002, Yokohama.

EFFECTS OD THE DRIVING FORCE ON THE COMPOSITION OF NATURAL GAS HYDRATES
O.I. Levik, J.-P. Monfort & J.S. Gudmundsson
4th International Conference on Gas Hydrates, May 19-23 2002, Yokohama.

PRESSURE PULSE ANALYSIS OF FLOW IN TUBING AND CASING OF GAS LIFT WELLS
J.S. Gudmundsson, I. Durgut, J. Rønnevig, K. Korsan & H.K. Celius
Spring 2002 ASME/API Gas Lift Workshop, February 5-6, 2002, Houston

FRICTION FACTOR IN HIGH PRESSURE NATURAL GAS PIPELINES FROM ROUGHNESS MEASUREMENTS
E. Sletfjerding & J.S. Gudmundsson
International Gas Research Conference, November 5-8, 2001, Amsterdam.

STRANDED GAS TO HYDRATE FOR STORAGE AND TRANSPORT
J.S. Gudmundsson & M. Mork
International Gas Research Conference, November 5-8, 2001, Amsterdam.

HYDRATE FORMATION RATE IN A CONTINUOUS STIRRED TANK REACTOR
M. Mork & J.S. Gudmundsson
International Gas Research Conference, November 5-8, 2001, Amsterdam.

NATURAL GAS IN NORWAY AND THE MID-NORDIC GAS PIPELINE STUDY
J.S. Gudmundsson, Energy Conference, Reykjavik, October 11-12, 2001.

MODERATE VELOCITY FLOW IN FRACTURES
T. Kløv, E. Skjetne & J.S. Gudmundsson
SPE Paper 71664, SPE Annual Technical Conference and Exhibition, New Orleans, 30 September-3 October, 10 pp.

DETECTION AND MONITORING OF DEPOSITS IN MULTIPHASE FLOW PIPELINES USING PRESSURE PULSE TECHNOLOGY
J.S. Gudmundsson, I. Durgut, H.K. Celius & K. Korsan
12th International Oil Field Chemistry Symposium, Gailo, Norway, April 1-4, 2001, 13 pp.

RATE OF HYDRATE FORMATION IN SUBSEA PIPELINES - CORRELATION BASED ON REACTOR EXPERIMENTS
M. Mork & J.S. Gudmundsson
12th International Oil Field Chemistry Symposium, Gailo, Norway, April 1-4, 2001, 12 pp.

EXPERMIMENTS AND MODELING OF HIGH-VELOCITY PRESSURE LOSS IN SANDSTONE FRACTURES
E. Skjetne, T. Kløv & J.S. Gudmundsson
SPE Journal, March 2001, 61-70.

FRICTION FACTOR DIRECTLY FROM ROUGHNESS MEASUREMENTS
E. Sletfjerding & J.S. Gudmundsson
Proceedings, ETCE 2001, 23rd Energy Sources Technology Conference and Exposition, February 5-7, 2000, Houston, Texas, 7 pp.

HIGH-INTENSITY, NEAR-SHORE CARBON DIOXIDE ENHANCED GROWTH OF ALGAE
J.S. Gudmundsson, S. Myklestad, K.Y. Børsheim & T. Kløv
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, Trondheim, December 2000, 46 pp.

WATERHAMMER IN HIGH-PRESSURE MULTIPHASE FLOW
K. Falk & J.S. Gudmundsson
Proceedings, 8th International Conference on Pressure Surges, The Hague, 12-14 April 2000, 41-54.

NATURAL GAS HYDRATE (NGH) TECHNOLOGY FOR STRANDED GAS
J.S. Gudmundsson, O.F. Graff, A.M. Hove & G. Laading
IBC Remote Gas Utilisation, London, December 1, 1999.

GAS-LIQUID METERING USING PRESSURE-PULSE TECHNOLOGY
J.S. Gudmundsson & H.K. Celius
SPE 56584, Annual Technical Conference and Exhibiton, Houston, 3-6 October 1999.

NGH ON FPSO - SLURRY PROCESS AND COST ESTIMATE
J.S. Gudmundsson, V. Andersson, I. Durgut, O.I. Levik & M. Mork
SPE 56629, Annual Technical Conference and Exhibition, Houtston, 3-6 October 1999.

MULTIPHASE PRESSURE PULSES FOR QUICK-ACTING VALVES: OFFSHORE TESTING
K. Falk & J.S. Gudmundsson
SPE 56526, Annual Technical Conferene and Exhibition, Houston, 3-6 October, 1999.

FLOW EXPERIMENTS ON CONCENTRATED HYDRATE SLURRIES
V. Andersson & J.S. Gudmundsson, SPE 56567, Annual Technical Conference and Exhibition, Houston, 3-6 October, 1999.

TRANSPORTING OIL AND GAS HYDRATE SLURRIES
V. Andersson & J.S. Gudmundsson
14th International Conference Slurry Handling and Pipeline Transport, Hydrotransport 14, Maastricht, The Netherlands, 8-10 September, 1999.

HIGH-VELOCITY PRESSURE LOSS IN SANDSTONE FRACTURES: MODELLING AND EXPERIMENTS
E. Skjetne, T. Kløv & J.S. Gudmundsson
Proc., 1999 International Symposium of the Society of Core Analysts, Colorado School of Mines, Colorado, August 1-4, 1999, SCA-9927, 12 pp.

HYRATE TECHNOLOGY FOR CAPTURING STRANDED GAS
J.S. Gudmundsson, V. Andersson, O.I. Levik & M. Mork
3rd. International Conference on Gas Hydrates, Salt Lake City, Utah, July 18-22, 1999

LABORATORY FOR CONTINUOUS PRODUCTION OF NATURAL GAS HYDRATES
J.S. Gudmundsson, M. Parlaktuna, O.I. Levik & V. Andersson
3rd. International Conference on Gas Hydrates, Salt Lake City, Utah, July 18-22, 1999

FLOW PROPERTIES OF HYDRATE-IN-WATER SLURRIES
V. Andersson & J.S. Gudmundsson
3rd. International Conference on Gas Hydrates, Salt Lake City, Utah, July 18-22, 1999.

CALORIMETRY TO STUDY METASTABILITY OF NATURAL GAS HYDRATE AT ATMOSPHERIC PRESSURE AND TEMPERATURES BELOW 0 C
O.I. Levik & J.S. Gudmundsson
3rd. International Conference on Gas Hydrates, Salt Lake City, Utah, July 18-22, 1999.

NATURAL GAS STORAGE PROPERTIES OF STRUCTURE H HYDRATE
A.A. Khokhar, E.D. Sloan & J.S. Gudmundsson
3rd. International Conference on Natural Gas Hydrates, Salt Lake City, Utah, July 18-22, 1999.

PRESSURE PULSE IN MULTIPHASE WELLS: OFFSHORE TESTING AND MODELLING
K. Falk & J.S. Gudmundsson
9th International Conference Multiphase-99, Cannes, 16-18 June 1999, 10 pp.

FLOW OF NATURAL GAS IN PIPES AT HIGH REYNOLDS NUMBERS
E. Sletfjerding, J.S. Gudmundsson & K. Sjøen
EUROGAS 99, European Applied Research Conference on Natural Gas, 25-27 May, 1999, Ruhr-Universität Bochum.

PRESSURE PULSE AND VOID FRACTION PROPAGATION IN TWO-PHASE FLOW: EXPERIMENTS FOR DIFFERENT FLOW REGIMES
K. Falk, E. Hervieu & J.S. Gudmundsson
Proc. 2nd International Symposium on Two-Phase Flow in Modelling and Experiments, May 23-26, 1999, Pisa, 8 pp.

GAS FRACTIONATION DURING HYDRATE FORMATION AND LONG-TERM STORAGE OF FROZEN HYDRATE SAMPLES
M. Parlaktuna, I. Durgut & J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, April 1999, Trondheim, 33 pp.

VISCOSITY OF WATER-CONTINUOUS GAS HYDRATE SLURRIES
V. Andersson & J.S. Gudmundsson
Rheology in the Mineral and Energy Industires, Oahu, Hawaii, March 14-19, 1999, 11 pp.

HIGH-VELOCITY FLOW IN A ROUGH FRACTURE
E. Skjetne, A. Hansen & J.S. Gudmundsson
J. Fluid Mech.
(1999), vol. 383, pp.1-28.

PROCESS FOR OFFSHORE PRODUCTION OF HYDRATE SLURRY
J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, November 1998, 29pp.

CONTINUOUS PRODUCTION RATE OF HYDRATE
M. Parlaktuna & J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, October 1998, 22pp.

SOLUBILITY OF METHANE IN EXXSOL D60
M. Parlaktuna, V. Andresson, J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, October 1998, 15pp.

FLOW EXPERIMENTS WITH HIGH PRESSURE NATURAL GAS IN COATED AND PLAIN PIPES
E. Sletfjerding, J.S. Gudmundsson, K. Sjoen
PSIG 30TH Annual Meeting, Denver Colorado, October 28-30, 1998, 14 pp.

HYDRATE CONCEPT FOR CAPTURING ASSOCIATED GAS
J.S. Gudmundsson, V. Andersson, O.I. Levik & M. Parlaktuna
SPE European Petroleum Conference, The Hague, The Netherlands, 20-22 October, 1998, SPE Paper 50598

INNOVATION IN FRACTURE ROUGHNESS CHARACTERIZATION
E. Skjetne, T. Kloev & J.S. Gudmundsson
SCA-9844, Proceedings of the 1998 International Symposium of the Society of Core Analysts, The Hague, 14-16 September, 1998.

GAS STORAGE IN STRUCTURE H HYDRATES
A.A. Khokhar, J.S. Gudmundsson & E.D. Sloan
Fluid Phase Equilibria, Volumes 150-151, 384-392.

STREAMING POTENTIAL, WATERCUT AND SALINITY
B.O. Dahle & J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, June 1998, 16 pp.

TESTING OF WATERCUT METER
B.O. Dahle & J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, June 1998, 13 pp.

DISSOLVED GAS IN HYDRATE PRODUCTION
M. Parlaktuna & J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, May 1998, 34 pp.

EXPERIMENTS IN HYDRATE LABORATORY
V. Andresson, O.I. Levik & J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, January 1998, 101pp.

PRESSURE DROP MEASUREMENTS IN SMOOTH AND ROUGH TEST PIPES AT K-LAB IN 1997 AND 1998
E. Sletfjerding & J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, Trondheim, January 1998, 53 pp.

PERFORATION INFLOW REDUCES FRICTIONAL PRESSURE LOSS IN HORIZONTAL WELLBORES
Z. Su & J.S. Gudmundsson
Journal of Petroleum Science and Engineering 19 (1998) 223-232.

METHOD TO DETERMINE FLOW RATE OF A FLUID, IN PARTICULAR TWO-PHASE FLOW
J.S. Gudmundsson
Norwegian Patent, No. 300437, 1997.

CHALLENGES AND CONCERNS
J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, October 1998, 11pp.

GAS STORAGE AND TRANSPORT USING HYDRATES
J.S. Gudmundsson, V. Andersson and O.I. Levik
Offshore Mediterranean Conference
Ravenna, March 19-21, 1997

GAS TRANSPORTATION IN HYDRATE FORM
A. Børrehaug and J.S. Gudmundsson
EUROGAS, 3-5 June, 1996, Trondheim, 35-41.

FROZEN HYDRATE FOR TRANSPORT OF NATURAL GAS
J.S. Gudmundsson and A. Børrehaug
2nd International Conference on Natural Gas Hydrates, Toulouse, June 2-6, 1996, pp. 415-422.

FORMATION RATE OF METHANE AND MIXTURE HYDRATE
M. Parlaktuna and J.S. Gudmundsson
2nd International Conference on Natural Gas Hydrates, Toulouse, June 2-6, 1996, pp. 439-446.

NATURAL GAS HYDRATE - AN ALTERNATIVE TO LIQUIFIED NATURAL GAS
J.S. Gudmundsson and A. Børrehaug
Petroleum Review, Vol. 50, No. 592, May 1996, 232-235.

HEATING OF WATER IN OFFSHORE WELLS FOR GEOTHERMAL ENERGY EXTRACTION
J.S. Gudmundsson and A. Nygaard
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, Trondheim, April 1996, 19 pp.

PRESSURE PULSE LOGGING IN MULTILATERAL WELLS
A. Nygaard, O. Gimmestad and J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, Trondheim, March 1996, 26 pp.

FLOW TESTING OF MODEL CHOKE USING AIR/WATER
J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, Trondheim, February 1996, 47 pp.

PRESSUR PULSE 95
U. Gudmundseth, O. Gimmestad, J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, December 1995, 82pp.

GAS-IN-ICE
M. Parlaktuna, J.S.Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, September 1995, 53pp.

COUPLING OF WALL-SLIP FOR DETERMINATION OF GAS PERMEABILITY
E. Skjetne and J.S. Gudmundsson
International Symposium of the Society of Core Analysts, San Francisco, September 12-13, 1995.

GAS-IN-ICE: FORMATION RATE AND GAS CONTENT
M. Parlaktuna and J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, Trondheim, September 1995, 53 pp.

TRANSPORT OF NATURAL GAS AS FROZEN HYDRATE
J.S. Gudmundsson, F. Hveding and A. Børrehaug
Proceedings, Fifth International Offshore and Polar Engineering Conference, The Hague, The Netherlands, June 11-16, 1995, Vol. I, 282-288.

PRESSURE DROP IN PETROLEUM PRODUCTION OPERATIONS
J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, Trondheim, February 1995, 18 pp.

PRESSURE DROP IN PERFORATED PIPES
J.S. Gudmundsson and Z. Su
PROFIT Project Summary Reports, Norwegian Petroleum Directorate, Stavanger, 291-300.

CRUDE OIL/GAS HYDRATE SLURRY: CONCEPT EVALUATION
J.S. Gudmundsson, K. Korsan and A. Børrehaug
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, Trondheim, January 1995, 48 pp.

FROZEN HYDRATE COMPARED TO LNG
J.S. Gudmundsson, F. Hveding and A. Børrehaug
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, Trondheim, January 1995, 29 pp.

FROZEN HYDRATE COMPARED TO LNG
J.S. Gudmundsson, F. Hveding and A. Børrehaug
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, January 1995, 31pp.

CRUDE OIL/GAS HYDRATE SLURRY
J.S. Gudmundsson, K. Korsan and A. Børrehaug
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, January 1995, 49pp.

PRESSURE DROP IN PERFORATED PIPES - EXPERIMENTS AND ANALYSIS
Z. Su and J.S. Gudmundsson (1994)
SPE Asia Pacific Oil & Gas Conference, SPE 28800, Melbourne, Australia, November 7-10, 12 pp.

GAS-IN-ICE - HYDRATE FORMATION
J.S. Gudmundsson (1994)
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, Trondheim, September 1994, 104pp.

WAVE DYNAMICS OF GAS-LIQUID SYSTEMS
N.S. Khabeev and J.S. Gudmundsson (1994)
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, Trondheim, June, 39 pp.

METHODS TO ESTIMATE PRESSURE DROP IN SUBSEA FAIL-SAFE VALVES
J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, Trondheim, May 1994, 98 pp.

FRICTION FACTOR OF LARGE-DIAMETER COATED PIPES FOR GAS TRANSPORT
J.S. Gudmundsson
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian University of Science and Technology, Trondheim, April 1994, 21 pp.

STORAGE OF NATURAL GAS AS FROZEN HYDRATE
J.-S.
Gudmundsson, M. Parlaktuna and A.A. Khokhar (1994)
SPE Production Engineering, February, 69-73.

ANALYTICAL MODELS FOR RATE DECLINE IN OIL AND GAS RESERVOIRS
B. Cvetkovic and J.S. Gudmundsson (1993)
Technical Report, Department of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, Trondheim, December, 176 pp.

FRICTION FACTOR OF PERFORATION ROUGHNESS IN PIPES
Z. Su and J.-S.
Gudmundsson (1993)
SPE 26521, 68th Annual Technical Conference and Exhibition, Society og Petroleum Engineers, Houston, Texas, October 3-6.

MODEL FOR SOUND SPEED IN MULTIPHASE MIXTURES
L. Dong and J.-S.
Gudmundsson (1993)
Proceedings, 3rd Lerkendal Petroleum Engineering Workshop, January 20-21, Tapir Press, pp. 19-30.

MODEL FOR WALL-SLIP IN THE DARCY AND FORCHHEIMER GAS FLOW REGIMES
E. Skjetne and J.-S. Gudmundsson (1993)
Proceedings, 3rd Lerkendal Petroleum Engineering Workshop, January 20-21, Tapir Press, pp. 111-122.

HIGH-VELOCITY FLOW IN POROUS MEDIA
E. Skjetne and J.-S.
Gudmundsson (1993)
Division of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, Trondheim, Technical Report, 55 pp.

THIRD LERKENDAL PETROLEUM ENGINEERING WORKSHOP
J.S. Gudmundsson (ed.)
Norwegian Institute of Technology, January 20-21, 1993, Trondheim, 162 pp.

TWO-PHASE FLOW METERING BY PRESSURE PULSE PROPAGATION
J.-S.
Gudmundsson, L. Dong and F. Rødøy (1992)
Society of Petroleum Engineers, Paper SPE 24778, 67th Annual Technical Conference & Exhibition, Washington, D.C., October 4-7.

METERING OF GAS/LIQUID FLOWS IN PIPELINES
J.-S.
Gudmundsson and L. Dong (1992)
Division of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, University of Trondheim, Technical Report, 94 pp.

FRICTION FACTOR IN PIPES WITH CIRCULAR CAVITIES: EXPERIMENTAL WORK
Z. Su and J.-S. Gudmundsson (1992)
Division of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, University of Trondheim, Technical Report, 72 pp.

STORAGE OF NATURAL GAS HYDRATE AT REFRIGERATED CONDITIONS
J.-S.
Gudmundsson and M. Parlaktuna (1992)
A.I.Ch.E. Spring National Meeting, New Orleans, LA, March 29- April 2, 26 pp.

MOLECULAR DIFFUSION
J.-S.
Gudmundsson (1992)
Recent Advances in Improved Oil Recovery Methods for North Sea Sandstone Reservoirs (Editors S.M. Skjæveland and J. Kleppe), Norwegian Petroleum Directorate, Stavanger, 20-24.

EQUIPMENT AND METHOD FOR MEASUREMENT OF VELOCITY AND GAS/LIQUID RATIO IN MULTIPHASE FLOWS
J.S. Gudmundsson (1992)
Norwegian Patent, No. 174643, 23pp.

SECOND LERKENDAL PETROLEUM ENGINEERING WORKSHOP
J.S. Gudmundsson (ed.)
Norwegian Institute of Technology, February 5-6, 1992, Trondheim, 208 pp.

PHYSICAL PROPERTIES OF NATURAL GASES: COMPUTER PROGRAMME AND SUBROUTINES
M. Parlaktuna and J.-S. Gudmundsson (1991)
Division of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, University of Trondheim, Technical Report, 59 pp.

FLOW VELOCITY AND GAS/LIQUID RATIO
F. Rødøy and J.-S. Gudmundsson (1991)
Division of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, University of Trondheim, Technical Report, 58 pp., (in Norwegian).

GAS-IN-ICE: PRODUCTION AND STABILITY
M. Parlaktuna and J.-S. Gudmundsson (1991)
Division of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, University of Trondheim, Technical Report, 119 pp.

GAS-IN-ICE: STABILITY EXPERIMENTS
M. Parlaktuna, J.-S. Gudmundsson (1991)
Division of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, University of Trondheim, Technical Report, 89 pp.

SPINNER LOGGING OF A SINGLE PERFORATION
T. Kleppan and J.-S.
Gudmundsson (1991)
Proc., First Lerkendal Petroleum Engineering Workshop, Trondheim, February 6-7, 69-82.

GAS-IN-ICE: CONCEPT EVALUATION
J.-S. Gudmundsson and M. Parlaktuna (1991)
Division of Petroleum Engineering and Applied Geophysics, Norwegian Institute of Technology, University of Trondheim, Technical Report, 110 pp.

FIRST LERKENDAL PETROLEUM ENGINEERING WORKSHOP
J.S. Gudmundsson (ed.)
Norwegian Institute of Technology, February 6-7, 1991, Trondheim, 244 pp.

INFLUENCE OF PRODUCTION ON CHALK FAILURE IN THE VALHALL FIELD
L. Hermansson and J.-S.
Gudmundsson (1990)
SPE Paper 20952, EUROPEC 90, The Hague, Netherlands, October 22-24, 117-125.

WELL PRODUCTION AND CHALK INSTABILITY IN THE VALHALL FIELD
L. Hermansson and J.-S. Gudmundsson (1990)
Third North Sea Chalk Symposium, Copenhagen, June 11-12, 16 pp.

METHOD AND EQUIPMENT FOR PRODUCTION OF GAS HYDRATES
J.-S.
Gudmundsson (1990)
Norwegian Patent Number 172080, 11 pp.

DESCRIPTION AND ECONOMICS OF "HITAVEITA AKRANESS OG BORGARFJARDAR" IN ICELAND
R. Harrison, I. Hrólfsson and J.S. Gudmundsson (1990)
Geothermics, Vol. 19., No. 4, 359-365.

RESERVOIR COMPRESSIBILTY FROM WATER-INFLUX MODELING OF LIQUID-DOMINATED SYSTEMS
D.C. Brock and J.S. Gudmundsson (1989)
Proc., 14th Workshop Geothermal Reservoir Engineering, Stanford University, Stanford, California.

POWER POTENTIAL OF TWO-PHASE GEOTHERMAL WELLS
J.S. Gudmundsson and H. Thráinsson (1989)
Geothermics, Vol. 18, No. 3, 357-366.

DEVELOPMENTS IN THE UTILIZATION OF GEOTHERMAL ENERGY
J.S. Gudmundsson and V.K. Jónsson (eds.) (1989)
Workshop Report, National Energy Authority, Reykjavík.

GEOTHERMAL ENERGY IN HORTICULTURE
J.S. Gudmundsson (1989)
Developments in the Utilization of Geothermal Energy, J.S. Gudmundsson and V.K. Jónsson (eds.), National Energy Authority, (in Icelandic).

DEPOSITION OF SOLIDS IN GEOTHERMAL SYSTEMS
J.S. Gudmundsson and D.M. Thomas (eds.) (1989)
Geothermics, Special Issue, Vol. 18, No. 1/2, Pergamon Press, Oxford.

ADVANCES IN THE STUDY OF SOLIDS DEPOSITION IN GEOTHERMAL SYSTEMS
D.M. Thomas and J.S. Gudmundsson (1989)
Deposition of Solids in Geothermal Systems, J.S. Gudmundsson and D.M. Thomas (eds.), Geothermics, Special Issue, Vol. 18, No. 1/2, Pergamon Press, Oxford.

RESEARCH DIRECTIONS IN SOLIDS DEPOSITION IN GEOTHERMAL SYSTEMS
D.M. Thomas and J.S. Gudmundsson (1989)
Deposition of Solids in Geothermal Systems, J.S. Gudmundsson and D.M. Thomas (eds.), Geothermics, Special Issue, Vol. 18, No. 1/2, Pergamon Press, Oxford.

TWO-PHASE FLOW IN GEOTHERMAL WELLS
J.S. Gudmundsson (1988)
Geothermal Reservoir Engineering, E. Okandan (ed.) Kluwer Academic Publishers, Dordrecht, 63-75.

MATERIAL BALANCE MODELING OF GEOTHERMAL RESERVOIRS
J.S. Gudmundsson (1988)
Geothermal Reservoir Engineering, E. Okandan (ed.) Kluwer Academic Publishers, Dordrecht, 143-156.

SVARTSENGI HIGH-TEMPERATURE FIELD IN ICELAND
J.S. Gudmundsson (1988)
Geothermal Reservoir Engineering, E. Okandan (ed.) Kluwer Academic Publishers, Dordrecht, 317-325.

COMPRESSIBILITY AND SONIC VELOCITY IN STEAM/WATER MIXTURES
S. Sveinsson, J.S. Gudmundsson and V.K. Jónsson (1988)
Proc., 13th Workshop Geothermal Reservoir Engineering, Stanford University, Stanford, California.

THE ELEMENTS OF DIRECT USE
J.S. Gudmundsson (1988)
Geothermics, Vol. 17, No. 1, 119-136.

THE GEOTHERMAL INDUSTRY IN ICELAND
J.S. Gudmundsson and G. Pálmason (1987)
Geothermics, Vol. 16, No 5/6, 567-573.

DIRECT USES OF EARTH HEAT
J.S. Gudmundsson and J.W. Lund (1987)
Applied Geothermics (M. Economides & P. Ungemach, eds.), John Wiley & Sons, Ltd., 189-219.

WATER INFLUX MODELING OF SVARTSENGI GEOTHERMAL FIELD IN ICELAND
J.S. Gudmundsson & G. Olsen (1987)
SPE Reservoir Engineering, Vol.2, No.1 (Feb.) 77-84.

PRESSURE BUILDUP TESTING OF WELL 18 IN LOS AZUFRES FIELD, MEXICO
P. Sánchez-U.
& J.S. Gudmundsson (1987)
Proc., 12th Workshop, Geothermal Reservoir Engineering, Stanford University, Stanford, California.

THE UNITED NATIONS UNIVERSITY IN ICELAND: A GEOTHERMAL TRAINING PROGRAMME FOR DEVELOPING COUNTRIES
J.S. Gudmundsson (1987) Bull., Geothermal Resources Council, Vol. 16, No. 1, 8-10.

THE SVARTSENGI RESERVOIR IN ICELAND
J.S. Gudmundsson and S. Thórhallsson (1986)
Geothermics, Vol. 15, No. 1, 3-15.

SURVEY OF SOIL HEATING IN ICELAND
B. Jóhannsdóttir, J.A. Graber and J.S. Gudmundsson (1986)
Technical Report, OS-86058/JHD-21, National Energy Authority, Reykjavík, (in Icelandic).

SILICA DEPOSITION DURING INJECTION IN SVARTSENGI FIELD
T. Hauksson and J.S. Gudmundsson(1986)
Trans., Geothermal Resources Council, Vol. 10, Davis, California, 377-383.

COLLECTION AND EVALUATION OF FLOWING PRESSURE AND TEMPERATURE DATA FROM GEOTHERMAL WELLS
A.K. Ambastha and J.S. Gudmundsson (1986) Stanford Geothermal Program, Report SGP-TR-100.

ISOTOPE MONITORING IN SVARTSENGI GEOTHERMAL FIELD
J.S. Gudmundsson and C.J. Janik (1986)
5th International Symposium Water-Rock Interaction, Reykjavík, Iceland, August 8-17, 244-247.

STREAMTUBE RELATIVE-PERMEABILITY FUNCTION FOR FLASHING STEAM WATER FLOW IN FRACTURES
J.S. Gudmundsson, A.J. Menzies and R.N. Horne (1986)
SPE Reservoir Engineering, Vol 1, No. 4 (July), 371-377.

DEVELOPMENT MODEL FOR GEOTHERMAL RESOURCES
J.A. Marcou and J.S. Gudmundsson (1986)
Paper SPE 15119, Society Petroleum Engineers, 56th California Regional Meeting, Oakland, California, April 2-4.

TWO-PHASE GEOTHERMAL WELLS
J.S. Gudmundsson (1986)
Bull., Geothermal Resources Council, Vol. 15, No. 3 (March), 10-16.

COMPOSITE MODEL OF GEOTHERMAL RESERVOIRS
J.S. Gudmundsson (1986)
Bull., Geothermal Resources Council, Vol. 15, No. 1 (January), 3-10.

PRESSURE PROFILES IN TWO-PHASE GEOTHERMAL WELLS: COMPARISON OF FIELD DATA AND MODEL CALCULATIONS
A.K. Ambastha and J.S. Gudmundsson (1986)
Proc., 11th Workshop Geothermal Resources Engineering, Stanford University, Stanford, California, January 21-23.

GEOTHERMAL TWO-PHASE WELLBORE FLOW: PRESSURE DROP CORRELATIONS AND FLOW PATTERN TRANSITIONS
A.K. Ambastha and J.S. Gudmundsson (1986)
11th Workshop Geothermal Reservoir Engineering, Stanford University, Stanford, California, January 21-23.

FLOW TESTING OF THE NEWBERRY 2 RESEARCH DRILLHOLE, NEWBERRY VOLCANO, OREGON
S.E. Ingebritsen, W.W. Carothers, R.H. Mariner, J.S. Gudmundsson and E.A. Sammel (1986)
Water Resources Investigations Report 86-4133, US Geological Survey, Menlo Park, California, 23 pp.

DELIVERABILITY AND ITS EFFECTS ON GEOTHERMAL POWER COSTS
J.S. Gudmundsson and J.A. Marcou (1986)
Proc., 11th Workshop Geothermal Reservoir Engineering, Stanford University, Stanford, California, January 21-23.

PRODUCTION TESTING IN MIRAVALLES GEOTHERMAL FIELD, COSTA RICA
E.E. Granados and J.S. Gudmundsson (1985)
Geothermics, Vol. 14, No. 4, 517-524.

GEOTHERMAL ENERGY
J.S. Gudmundsson (1985)
The SFA Quarterly Report, SFA Pacific, Inc., Mountain View, California, 51-66.

THE LINDAL DIAGRAM
J.S. Gudmundsson, D.H. Freeston and P.J. Lienau (1985)
Trans., Geothermal Resources Council, Vol. 9, Part I, 15-19.

TRACER SURVEY IN SVARTSENGI FIELD 1984
J.S. Gudmundsson and T. Hauksson (1985)
Trans., Geothermal Resources Council, Vol. 9, Part II, 307-315.

DIRECT USES OF GEOTHERMAL ENERGY IN 1984
J.S. Gudmundsson (1985)
International Symposium Geothermal Energy, International Volume, C. Stone (ed.), Geothermal Resources Council, Davis, California, 19-29.

SVARTSENGI FIELD PRODUCTION DATA AND DEPLETION ANALYSIS
J.S. Gudmundsson, G. Olsen and S. Thorhallsson (1985)
Proc., 10th Workshop Geothermal Reservoir Engineering, Report SGP-TR-84, Stanford University, Stanford, California, 45-51.

INJECTION AND TRACER TESTING IN SVARTSENGI FIELD, ICELAND
J.S. Gudmundsson, T. Hauksson, S. Thorhallsson, A. Albertsson and G. Thorolfsson (1984)
Proc., 6th New Zealand Geothermal Workshop, Auckland, New Zealand, 175-180.

DISCHARGE ANALYSIS OF WELL 9 IN REYKJANES FIELD, ICELAND
J.S. Gudmundsson, A.K. Ambastha, S. Thorhallsson (1984)
Proc., 6th New Zealand Geothermal Workshop, Auckland, New Zealand, 7-9, 157-162.

DISCHARGE ANALYSIS METHOD FOR TWO-PHASE GEOTHERMAL WELLS
J.S. Gudmundsson (1984)
Trans., Geothermal Resources Council, Vol. 8, 295-299.

APPLICATION OF STABLE ISOTOPE TECHNIQUES TO TRACING RECHARGE OF GEOTHERMAL SYSTEMS ON THE REYKJANES PENINSULA IN ICELAND
R.B. Cindrich and J.S. Gudmundsson (1984)
Report SGP-TR-79, Stanford Geothermal Program, Stanford University, Stanford, California, June 1984.

INTERWELL TRACER TESTING IN KLAMATH FALLS
J.S. Gudmundsson (1984)
Chapter 4, Analysis and Interpretation of Data Obtained in Tests of the Geothermal Aquifer at Klamath Falls, Oregon, E.A. Sammel (ed.), US Geological Survey, Water Resources Investigations Report 84-4216, Menlo Park, California.

TWO-PHASE FLOW AND CALCITE DEPOSITION IN GEOTHERMAL WELLS
J.S. Gudmundsson, J. Ortiz-R.
and E.E. Granados (1984)
Paper SPE 12741, California Regional Meeting, Long Beach, California, April 11-13.

DOUBLET TRACER TESTING IN KLAMATH FALLS, OREGON
J.S. Gudmundsson, S.E. Johnson, R.N. Horne,
P.B. Jackson and G.G. Culver (1983) Proc. 9th Workshop Geothermal Reservoir Engineering, Stanford, California, SGP-TR-74, 331-337.

GEOTHERMAL IN ICELAND: ITS ONLY NATURAL
J.S. Gudmundsson (1983)
Quarterly Bulletin, Geo-Heat Center, Oregon Institute of Technology, Vol. 8, No. 1, 3-11.

CHOKED FLOW IN FRACTURED GEOTHERMAL RESERVOIRS
A.J. Menzies, J.S. Gudmundsson and R.N. Horne (1983)
Proc. 5th New Zealand Geothermal Workshop, Auckland, 175-180.

GEOTHERMAL SOIL HEATING IN ICELAND
J.S. Gudmundsson (1983)
Trans., Geothermal Resources Council, Vol. 7, 601-606.

INJECTION TESTING IN 1982 AT THE SVARTSENGI HIGH-TEMPERATURE FIELD IN ICELAND
J.S. Gudmundsson (1983)
Trans., Geothermal Resources Council, Vol. 7, 423-428.

INJECTION EXPERIMENT AT SVARTSENGI IN 1982
J.S. Gudmundsson (1983)
Report OS-83-043/JHD-07, National Energy Authority, (in Icelandic).

GEOTHERMAL ELECTRIC POWER IN ICELAND: DEVELOPMENT IN PERSPECTIVE
J.S. Gudmundsson (1983)
Energy, Vol. 8, No. 7, 491-513.

SILICA DEPOSITION FOR GEOTHERMAL BRINE AT SVARTSENGI, ICELAND
J.S. Gudmundsson (1983)
Proc., Solving Corrosion and Scaling Problems in Geothermal Systems, National Association of Corrosion Engineers, Houston, Texas, 72-87.

FLASHING FLOW IN FRACTURED GEOTHERMAL RESERVOIRS
A.J. Menzies, J.S. Gudmundsson and R.N. Horne (1982)
Proc., 8th Workshop Geothermal Reservoir Engineering, SGP-TR-60, Stanford University, Stanford, California, 143-147.

SMALL-SCALE GEOTHERMAL ELECTRIC UNITS IN ICELAND
J.S. Gudmundsson (1982)
Proc. 6th Geothermal Conference and Workshop, Electric Power Research Institute, Palo Alto, California, Report EPRI-AP-2760, 6/61-6/68.

SUBSURFACE SOIL HEATING WITH GEOTHERMAL WATER IN PIPES: NUMERICAL SOLUTIONS OF THE ENERGY EQUATION
V.K. Jonson, G. Leifsson and J.S. Gudmundsson (1982)
Proc., International Conference Geothermal Energy, BHRA Fluid Engineering, Cranfield, England, Vol. 2, 173-180.

LOW-TEMPERATURE GEOTHERMAL ENERGY USE IN ICELAND
J.S. Gudmundsson (1982)
Geothermics, Vol. 11, No. 1, 59-68.

WORLD USES OF LOW-TEMPERATURE (<150°C) GEOTHERMAL RESOURCES IN 1980
J.S. Gudmundsson and G. Palmason (1982)
Trans., Geothermal Resources Council, Vol. 6, 441-444.

UTILIZATION OF GEOTHERMAL ENERGY IN HORTICULTURE
J.S. Gudmundsson (ed.) (1982)
National Energy Authority, Conference Report OS-82-027/JHD-03, (in Icelandic).

MEASUREMENTS OF TEMPERATURE AND FLOWRATE OF GEOTHERMAL WATER USED IN SOIL HEATING
J.S. Gudmundsson (1982)
Utilization of Geothermal Energy in Horticulture, J.S. Gudmundsson (ed.), Conference Report OS-82-027/JHD-03, National Energy Authority, Reykjavík, (in Icelandic).

PARTICULATE FOULING
J.S. Gudmundsson (1981)
Fouling of Heat Transfer Surfaces, Somerscales, E.F.C. and Knudsen J.G. (eds.), Hemisphere Publishing Corporation, Washington, 357-387.

THE REYKJANES GEOTHERMAL FIELD IN ICELAND: SUBSURFACE EXPLORATION AND DISCHARGE CHARACTERISTICS
J.S. Gudmundsson, T. Hauksson and J. Tomasson (1981)
Proc., 7th Workshop Geothermal Reservoir Engineering, Report SGP-TR-55, Stanford University, Stanford, California, 61-69.

DESIGN GUIDELINES FOR SOIL HEATING SYSTEMS
G. Leifsson and J.S. Gudmundsson (1981)
Internal Report GL-JSG-81/04, National Energy Authority, Reykjavík, 37 pp., (in Icelandic).

STATUS OF GEOTHERMAL ELECTRIC POWER IN ICELAND 1980
J.S. Gudmundsson, S. Thorhallsson and K. Ragnars (1981)
Proc., 5th Geothermal Conference Workshop, Electric Power Research Institute, Report EPRI AP-2098, 7/52-7/65.

WORLD SURVEY OF LOW-TEMPERATURE GEOTHERMAL ENERGY UTILIZATION
J.S. Gudmundsson and G. Palmason (1981)
Report OS-81-005/JHD-02, National Energy Authority, Reykjavík, 148 pp.

HEAT PUMPS IN GEOTHERMAL UTILIZATION
J.S. Gudmundsson (ed.) (1981)
National Energy Authority, Conference Report OS-81-008/JHD-04, (in Icelandic).

DISTRICT HEATING FOR HJALTADALUR
J.S. Gudmundsson (1981)
Heat Pumps in Geothermal Utilization, J.S. Gudmundsson (ed.), Conference Report OS-81-008/JHD-04, 13 pp., (in Icelandic).

ENVIRONMENTAL ASPECTS OF GEOTHERMAL ENERGY PRODUCTION AND UTILIZATION
J.S. Gudmundsson (1980)
Natturufraedingurinn (The Naturalist) , Vol. 50, No. 3/4, 294-308, (in Icelandic).

PRODUCTION OF FUELS IN ICELAND
J.S. Gudmundsson, B. Arnason, G. Jonsson and R. Thordarson (1980)
National Energy Authority, Working Group Report OS-80-024/JHD-13, 59 pp.

OUTPUT TESTING OF WELL 8 AT REYKJANES
J.S. Gudmundsson (1980)
National Energy Authority, Reykjavík, Internal Report, 16 pp., (in Icelandic).

LOW-TEMPERATURE GEOTHERMAL ENERGY IN ICELAND
J.S. Gudmundsson, M.J. Gunnarsdóttir, R. Halldórsson, K. Saemundsson, and H. Th. Jakobsson (1980)
National Energy Authority, Reykjavík, Internal Report, 38 pp., (in Icelandic).

TWO-PHASE FLOW IN THE UTILIZATION OF GEOTHERMAL ENERGY
J.S. Gudmundsson (ed.) (1979)
National Energy Authority, Report OS-79-046/JHD-22, (in Icelandic).

FEASIBILITY STUDY OF DISTRICT HEATING IN HJALTADALUR
J.S. Gudmundsson, O.B. Björnsson and Th. Einarsson (1979)
National Energy Authority, Report OS-79-045/JHD-21, 28 pp., (in Icelandic).

DEPOSITION OF SILICA FROM GEOTHERMAL WATERS ON HEAT TRANSFER SURFACES
J.S. Gudmundsson and T.R. Bott (1979)
Desalination, Vol. 28, 125-145.

HYDROGEN FUEL, HEAT TRANSFER FOULING AND SILICA USES
J.S. Gudmundsson (1979)
National Energy Authority, Reykjavík, Report OS-79-021/JHD-10, 40 pp.,(in Icelandic).

GASOLINE, METHANOL, HYDROGEN AND SYTHETIC FUELS
J.S. Gudmundsson and R. Thordarson (1979)
National Energy Authority, Reykjavík, Report OS-79-048/JHD-24, 24 pp., (in Icelandic).

DEPOSITION OF SILICA FROM THE DISCHARGE BRINE OF THE GEOTHERMAL POWER PLANT AT SVARTSENGI
J.S. Gudmundsson (1978)
National Energy Authority, Technical Report OS-JHD-7850, 40 pp., (in Icelandic).

RIPPLED SILICA DEPOSITS IN HEAT EXCHANGER TUBES
T.R. Bott and J.S. Gudmundsson (1978)
Proc., 6th International Heat Transfer Conference, Vol. 4, 373-378.

REVIEW OF RIPPLED MAGNETITE DEPOSITS IN SUPERCRITICAL ONCE-THROUGH BOILERS
J.S. Gudmundsson (1978)
Report AERE-M 2995, U.K. Atomic Energy Authority, Harwell, England, 16 pp.

CALCITE DEPOSITION IN THE DOWNHOLE PUMP OF SUDUREYRI DISTRICT HEATING SERVICE
J.S. Gudmundsson (1978)
National Energy Authority, Reykjavík Report OS-JHD-7839, 22 pp., (in Icelandic).

DEPOSITION IN THE SEA CHEMICALS PLANT AT REYKJANES
J.S. Gudmundsson (1978)
National Energy Authority, Reykjavík Report OS-JHD-7813, 18 pp., (in Icelandic).

THE INTERPRETATION OF OUTPUT CURVES OF GEOTHERMAL WELLS
J.S. Gudmundsson (1978)
National Energy Authority, Reykjavík, Report OS-JHD-7801, 10 pp., (in Icelandic).

RIPPLED DEPOSITS: FORMATION AND PRESSURE DROP EFFECTS
J.S. Gudmundsson, I.H. Newson and T.R. Bott (1977)
Atomic Energy Research Establishment, Technical Report AERE-R 8703, 29 pp.

DEPOSITION OF PARAFFIN WAX FROM FLOWING SYSTEMS
T.R. Bott and J.S. Gudmundsson (1977)
Institute of Petroleum, Technical Report IP-77-007.

DEPOSITION OF PARAFFIN WAS FROM KEROSENE IN COOLED HEAT EXCHANGER TUBES
T.R. Bott and J.S. Gudmundsson (1977)
Can. J. Chem. Eng., Vol. 55, 381.

SOLUBILITY OF PARAFFIN WAX IN KEROSENE
J.S. Gudmundsson and T.R. Bott (1977)
Fuel, Vol. 56, 15-16.

PARTICLE DIFFUSIVITY IN TURBULENT PIPE FLOW
J.S. Gudmundsson and T.R. Bott (1977)
J. Aerosol Sci., Vol. 8, 317.

DEPOSITION: THE GEOTHERMAL CONSTRAINT
J.S. Gudmundsson and T.R. Bott
I.
Chem. E. Symp. Ser,. No. 48, 27.1/27.20.

UTILIZATION OF GEOTHERMAL ENERGY IN ICELAND
J.S. Gudmundsson (1976)
Applied Energy, Vol. 2, No. 2, 127-140.

WAX DEPOSITION FROM HYDROCARBONS ON COOLED SURFACES
T.R. Bott and J.S. Gudmundsson (1976)
Technical Report AERE-M 2768, UK Atomic Energy Authority, Harwell, England, 8 pp.

PARAFFIN WAX DEPOSITION AND FOULING
J.S. Gudmundsson (1975)
M.Sc. Thesis, Department of Chemical Engineering, University of Birmingham.