Helge Hellevang

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Phone +47-22857026
Room 011
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Visiting address Sem Sælands vei 1 Geologibygningen 0371 OSLO
Postal address Postboks 1047 Blindern 0316 OSLO
Other affiliations Department of Geosciences

Academic Interests

  • General gas-water-rock interactions
  • Mineral carbonation

Current project

Geochemical modeling and experimental studies on increased oil recovery from heavy oil operations

Academic history

  • 2008-present Post Doc. at Department of Geosciences, University of Oslo. StatoilHydro Project on Geochemical modeling and experimental studies on increased oil recovery from heavy oil operations.
  • 2006-2008 Post Doc. at department of Earth Sciences and Center for Geobiology, University of Bergen. Gas-water-rock-bio interactions at hydrothermal conditions.
  • 2003-2006 PhD student. NRC Project Safe long-term storage of CO2 in aquifers. Research on interactions between CO2, aqueous solutions and minerals at Department of Physics and Technology, University of Bergen. The ACCRETE geochemistry code developed.
  • 2001-2002 Cand. Scient. (MSc) at Department of Geosciences. Title: Volcanic and petrological evolution of Late Ordovician oceanic crust: The Stavenes segment of the Solund-Stavfjord ophiolite.

Teaching

Tags: Geology, Geochemistry, Gas-fluid-rock interactions, CO2 storage

Publications

Papers

      Pham, V.T.H., Aagaard, P., Hellevang, H., 2012. On the potential for CO2 storage in continental flood basalts. Geochemical Transactions 13(5), 8p.     
 
      Pham, V.T.H., Lu, P., Aagaard, P., Zhu, C., Hellevang, H., 2011. On the potential of CO2-water-rock interactions for CO2 storage: A modified kinetics model. International Journal of Greenhouse Gas Control 5 (4), 1002-1015     
 
      Hellevang, H., Declercq, J., Aagaard, P., 2011. Why is dawsonite absent in CO2 charged reservoirs? Oil & Gas Science and Technology - Revue de l'IFP 66 (1), 119-135
 
      Helge Hellevang, 2008. On the forcing mechanism for the H2-driven deep biosphere International Journal of Astrobiology 7 (2), 157-167.

      Helge Hellevang, Per Aagaard, Eric H Oelkers, BjØrn Kvamme, 2005. Can dawsonite permanently trap CO2? Environ Sci Technol. v. 39:8281-7.

 

Recent Conference presentations

Hellevang, H. 2012. How well can we estimate H2 and CH4 generation on Earth and Mars? Invited talk at the European Workshop on Astrobiology, Stockholm, Sweden, Oct. 15-17.

Hellevang, H., Olaussen, S., 2012. CO2 and flue gas injection behavior – some unconventional ideas. Invited talk at the Longyearbyen CO2 Lab International Workshop, Longyearbyen, Svalbard, Norway. Sept. 17-20.

Hellevang, H., and Aagaard, P., 2012. On uncertainties in estimating the long-term potential for CO2 mineral storage. Nordic Geologic Winter Meeting, Reykjavik, Iceland, Jan. 9-12.

Hellevang, H., Alemu, B.L., and Aagaard, P., 2011. Mobilization of elements by CO2-mineral interactions. GSA Annual Meeting Minneapolis MN, Oct. 9-12.

Aagaard, P., Hellevang, H., Alemu, B.L., Pham, V.T.H., 2011. On the potential for secondary carbonate growth in sedimentary basins. 21st V.M. Goldschmidt conference. August 14-19, Prague, Czech Republic.

Hellevang, H., Thyberg, B., Jahren, J., 2011. Albite precipitation in mudstone – comparison of natural and synthetic systems. 21st V.M. Goldschmidt conference. August 14-19, Prague, Czech Republic.

Hellevang, H., Aagaard, P., 2010. On the use of Transition-State-Theory (TST) to predict the potential for carbonate growth in sedimentary basins. GSA Annual Meeting, Denver CO, October 31-November 3.

Hellevang, H., Aagaard, P., 2010. Can carbonate precipitation rates be derived from dissolution rate data? 20th V.M. Goldschmidt conference. June 13 - 18 in Knoxville, Tennessee, USA.

  • Hellevang, Helge; Haile, Beyene Girma & Abednego, Tetteh (2017). Experimental study to better understand factors affecting the CO2 mineral trapping potential of basalt. Greenhouse Gases: Science and Technology.  ISSN 2152-3878.  7(1), s 143- 157 . doi: 10.1002/ghg.1619
  • Nooraiepour, Mohammad; Haile, Beyene Girma & Hellevang, Helge (2017). Compaction and mechanical strength of Middle Miocene mudstones in the Norwegian North Sea - the major seal for the Skade CO2 storage reservoir. International Journal of Greenhouse Gas Control.  ISSN 1750-5836.  67, s 49- 59 . doi: 10.1016/j.ijggc.2017.10.016 Show summary
  • Nooraiepour, Mohammad; Mondol, Nazmul Haque; Hellevang, Helge & Bjørlykke, Knut (2017). Experimental mechanical compaction of reconstituted shale and mudstone aggregates: Investigation of petrophysical and acoustic properties of SW Barents Sea cap rock sequences. Marine and Petroleum Geology.  ISSN 0264-8172.  80, s 265- 292 . doi: 10.1016/j.marpetgeo.2016.12.003 Show summary
  • Ahmad, Nawaz; Anders, Wörman; Xavier, Sanchez-Vila; Jerker, Jarsjö; Andrea, Bottacin-Busolin & Hellevang, Helge (2016). Injection of CO2-saturated brine in geological reservoir: A way to enhanced storage safety. International Journal of Greenhouse Gas Control.  ISSN 1750-5836.  54(1), s 129- 144 . doi: 10.1016/j.ijggc.2016.08.028
  • Hellevang, Helge; Haile, Beyene Girma & Miri, Rohaldin (2016). A Statistical Approach to Explain the Solution Stoichiometry Effect on Crystal Growth Rates. Crystal Growth & Design.  ISSN 1528-7483.  16(3), s 1337- 1348 . doi: 10.1021/acs.cgd.5b01466
  • Kirstein, Jens; Hellevang, Helge; Haile, Beyene Girma; Gleixner, Gerd & Gaupp, Reinhard (2016). Experimental determination of natural carbonate rock dissolution rates with a focus on temperature dependency. Geomorphology.  ISSN 0169-555X.  261, s 30- 40 . doi: 10.1016/j.geomorph.2016.02.019
  • Miri, Rohaldin & Hellevang, Helge (2016). Salt precipitation during CO2 storage - a review. International Journal of Greenhouse Gas Control.  ISSN 1750-5836.  51, s 136- 147 . doi: 10.1016/j.ijggc.2016.05.015
  • Naseryan Moghadam, Javad; Mondol, Nazmul Haque; Aagaard, Per & Hellevang, Helge (2016). Effective stress law for the permeability of clay-bearing sandstones by the Modified Clay Shell model. Greenhouse Gases: Science and Technology.  ISSN 2152-3878.  6(6), s 752- 774 . doi: 10.1002/ghg.1612 Show summary
  • Naseryan Moghadam, Javad; Mondol, Nazmul Haque; Aagaard, Per & Hellevang, Helge (2016). Experimental investigation of seismic velocity behavior of CO2 saturated sandstones under varying temperature and pressure conditions. Greenhouse Gases: Science and Technology.  ISSN 2152-3878.  6(6), s 734- 751 . doi: 10.1002/ghg.1603 Show summary
  • Szabo, Zsuzanna; Hellevang, Helge; Kiraly, Csilla; Sendula, Eszter; Kónya, Péter; Falus, György; Török, Szabina B. & Szabó, Csaba (2016). Experimental-modelling geochemical study of potential CCS caprocks in brine and CO2-saturated brine. International Journal of Greenhouse Gas Control.  ISSN 1750-5836.  44, s 262- 275 . doi: 10.1016/j.ijggc.2015.11.027
  • Xi, Kelai; Cao, Yingchang; Haile, Beyene Girma; Zhu, Rukai; Jahren, Jens; Bjørlykke, Knut; Zhang, Xiangxiang & Hellevang, Helge (2016). How does the pore-throat size control the reservoir quality and oiliness of tight sandstones? The case of the Lower Cretaceous Quantou Formation in the southern Songliao Basin, China. Marine and Petroleum Geology.  ISSN 0264-8172.  76, s 1- 15 . doi: 10.1016/j.marpetgeo.2016.05.001
  • Xi, Kelai; Cao, Yingchang; Zhu, Rukai; Haile, Beyene Girma & Hellevang, Helge (2016). Evidences of localized CO2-induced diagenesis in the Cretaceous Quantou Formation, southern Songliao Basin, China. International Journal of Greenhouse Gas Control.  ISSN 1750-5836.  52, s 155- 174 . doi: 10.1016/j.ijggc.2016.07.010
  • Haile, Beyene Girma; Hellevang, Helge; Aagaard, Per & Jahren, Jens (2015). Experimental nucleation and growth of smectite and chlorite coatings on clean feldspar and quartz grain surfaces. Marine and Petroleum Geology.  ISSN 0264-8172.  68(Part A), s 664- 674 . doi: 10.1016/j.marpetgeo.2015.02.006
  • Hellevang, Helge & Aagaard, Per (2015). Constraints on natural global atmospheric CO2 fluxes from 1860 to 2010 using a simplified explicit forward model. Scientific Reports.  ISSN 2045-2322.  5 . doi: 10.1038/srep17352 Full text in Research Archive.
  • Miri, Rohaldin; Van Noort, Reinier; Aagaard, Per & Hellevang, Helge (2015). New insights on the physics of salt precipitation during injection of CO2 into saline aquifers. International Journal of Greenhouse Gas Control.  ISSN 1750-5836.  43, s 10- 21 . doi: 10.1016/j.ijggc.2015.10.004
  • Tambach, TJ & Hellevang, Helge (2015). Discussion on the paper titled "Effect of reactive surface area of minerals on mineralization and carbon dioxide trapping in a depleted gas reservoir" by Bolourinejad et al. (2014). International Journal of Greenhouse Gas Control.  ISSN 1750-5836.  34, s 141- 143 . doi: 10.1016/j.ijggc.2014.12.018
  • Xi, Kelai; Cao, Y; Jahren, Jens; Zhu, R; Bjørlykke, Knut; Haile, Beyene Girma; Zheng, L & Hellevang, Helge (2015). Diagenesis and reservoir quality of the Lower Cretaceous Quantou Formation tight sandstones in the southern Songliao Basin, China. Sedimentary Geology.  ISSN 0037-0738.  330, s 90- 107 . doi: 10.1016/j.sedgeo.2015.10.007
  • Xi, Kelai; Cao, Y; Jahren, Jens; Zhu, R; Bjørlykke, Knut; Zhang, X; Cai, L & Hellevang, Helge (2015). Quartz cement and its origin in tight sandstone reservoirs of the Cretaceous Quantou formation in the southern Songliao basin, China. Marine and Petroleum Geology.  ISSN 0264-8172.  66(4), s 748- 763 . doi: 10.1016/j.marpetgeo.2015.07.017
  • Hellevang, Helge; Aagaard, Per & Jahren, Jens (2014). Will dawsonite form during CO2 storage?. Greenhouse Gases: Science and Technology.  ISSN 2152-3878.  4(2), s 191- 199 . doi: 10.1002/ghg.1378
  • Hellevang, Helge; Miri, Rohaldin & Haile, Beyene Girma (2014). New insights into the mechanisms controlling the rate of crystal growth. Crystal Growth & Design.  ISSN 1528-7483.  14(12), s 6451- 6458 . doi: 10.1021/cg501294w
  • Miri, Rohaldin; Aagaard, Per & Hellevang, Helge (2014). Examination of CO2–SO2 Solubility in Water by SAFT1. Implications for CO2 Transport and Storage. Journal of Physical Chemistry B.  ISSN 1520-6106.  118(34), s 10214- 10223 . doi: 10.1021/jp505562j
  • Miri, Rohaldin; Hellevang, Helge; Braathen, Alvar & Aagaard, Per (2014). Phase relations in the Longyearbyen CO2 Lab reservoir - forecasts for CO2 injection and migration. Norsk Geologisk Tidsskrift.  ISSN 0029-196X.  94(2-3), s 217- 232
  • Naseryan-Moghadam, Javad; Mondol, Nazmul Haque; Hellevang, Helge; Johnsen, Øistein & Aagaard, Per (2014). Seismic Response of CO2 Saturated Red Wildmoor Sandstone under Varying Temperatures and Pressures, In EAGE2014 (ed.),  Workshop Proceedings. 76th EAGE Conference & Exhibition.  European Association of Geoscientists and Engineers.  ISBN 978-90-73834-90-3.  Tu G107 15.
  • Neubeck, Anna; Duc, Nguyen Thanh; Hellevang, Helge; Oze, Christopher; Bastviken, David; Bacsik, Zoltan & Holm, Nils G. (2014). Olivine alteration and H2 production in carbonate-rich, low temperature aqueous environments. Planetary and Space Science.  ISSN 0032-0633.  96, s 51- 61 . doi: 10.1016/j.pss.2014.02.014
  • Hellevang, Helge & Aagaard, Per (2013). Can the long-term potential for carbonatization and safe long-term CO2 storage in sedimentary formations be predicted?. Applied Geochemistry.  ISSN 0883-2927.  39, s 108- 118 . doi: 10.1016/j.apgeochem.2013.09.012
  • Hellevang, Helge; Dypvik, Henning; Kalleson, Elin; Pittarello, Lidia & Koeberl, Christian (2013). Can alteration experiments of impact melts from El'gygytgyn and volcanic glasses shed new light on the formation of the Martian surface?. Meteoritics and Planetary Science.  ISSN 1086-9379.  48(7), s 1287- 1295 . doi: 10.1111/maps.12046
  • Hellevang, Helge; Pham, Van Thi Hai & Aagaard, Per (2013). Kinetic modelling of CO2-water-rock interactions. International Journal of Greenhouse Gas Control.  ISSN 1750-5836.  15, s 3- 15 . doi: 10.1016/j.ijggc.2013.01.027
  • Liu, Faye; Lu, Peng; Griffith, Craig; Hedges, Sheila W.; Soong, Yee; Hellevang, Helge & Zhu, Chen (2012). CO2-brine-caprock interaction: Reactivity experiments on Eau Claire shale and a review of relevant literature. International Journal of Greenhouse Gas Control.  ISSN 1750-5836.  7, s 153- 167 . doi: 10.1016/j.ijggc.2012.01.012
  • Pham, Van Thi Hai; Aagaard, Per & Hellevang, Helge (2012). On the potential for CO2 mineral storage in continental flood basalts - PHREEQC batch- and 1D diffusion-reaction simulations. Geochemical Transactions.  ISSN 1467-4866.  13 . doi: 10.1186/1467-4866-13-5
  • Aker, Eyvind; Bjørnarå, Tore Ingvald; Braathen, Alvar; Brandvoll, Øyvind; Dahle, Helge K.; Nordbotten, Jan Martin; Aagaard, Per; Hellevang, Helge; Alemu, Binyam Lema; Pham, Van Thi Hai; Johansen, Harald; Wangen, Magnus; Nøttvedt, Arvid; Aavatsmark, Ivar; Johannessen, Truls & Durand, Dominique (2011). SUCCESS: SUbsurface CO2 storage–Critical elements and superior strategy. Energy Procedia.  ISSN 1876-6102.  4, s 6117- 6124 . doi: 10.1016/j.egypro.2011.02.619 Full text in Research Archive. Show summary
  • Hellevang, Helge; Declercq, Julien & Aagaard, Per (2011). Why is Dawsonite Absent in CO2 Charged Reservoirs?. Oil & gas science and technology.  ISSN 1294-4475.  66(1), s 119- 135 . doi: 10.2516/ogst/2011002
  • Hellevang, Helge; Huang, Shanshan & Thorseth, Ingunn Hindenes (2011). The potential for low-temperature abiotic hydrogen generation and a hydrogen-driven deep biosphere. Astrobiology.  ISSN 1531-1074.  11(7), s 711- 724 . doi: 10.1089/ast.2010.0559
  • Khattri, Sanjay Kumar; Fladmark, Gunnar E; Hellevang, Helge & Kvamme, Bjørn (2011). Simulation of long-term fate of CO2 in the sand of Utsira. Journal of Porous Media.  ISSN 1091-028X.  14(2), s 149- 166 Show summary
  • Pham, Van Thi Hai; Lu, P; Aagaard, Per; Zhu, Chen & Hellevang, Helge (2011). On the potential of CO2-water-rock interactions for CO2 storage using a modified kinetic model. International Journal of Greenhouse Gas Control.  ISSN 1750-5836.  5(4), s 1002- 1015 . doi: 10.1016/j.ijggc.2010.12.002
  • Pham, Van Thi Hai; Maast, Tom Erik; Hellevang, Helge & Aagaard, Per (2011). Numerical modeling including hysteresis properties for CO2 storage in Tubåen formation, Snøhvit field, Barents Sea. Energy Procedia.  ISSN 1876-6102.  4, s 3746- 3753 . doi: 10.1016/j.egypro.2011.02.308
  • Hellevang, Helge; Declercq, Julien; Kvamme, Bjørn & Aagaard, Per (2010). The dissolution rates of dawsonite at pH 0.9 to 5 and temperatures of 22, 60 and 77 degrees C. Applied Geochemistry.  ISSN 0883-2927.  25(10), s 1575- 1586 . doi: 10.1016/j.apgeochem.2010.08.007
  • Hellevang, Helge (2008). On the forcing mechanism for the H2-driven deep biosphere. International Journal of Astrobiology.  ISSN 1473-5504.  (7), s 157- 167 . doi: 10.1017/S1473550408004205
  • Hellevang, Helge & Kvamme, Bjørn (2007). An explicit and efficient algorithm to solve kinetically constrained CO2-water-rock interactions. WSEAS Transactions on Mathematics.  ISSN 1109-2769.  6(5), s 681- 687

View all works in Cristin

  • Hellevang, Helge & Kvamme, Bjørn (2007). ACCRETE - An explicit algorithm to solve kinetically constrained CO2-water-rock interactions. Proceedings of the WSEAS CEA, CISST, FLUIDS, HMT, MABE 2007.  ISBN 9789608457584.

View all works in Cristin

  • Bjørlykke, Knut; Jahren, Jens; Mondol, Nazmul Haque; Hellevang, Helge & Aagaard, Per (2017). Mechanical compaction of sand and clay: Constraints from experimental compaction, chemical reactions and fluid flow during burial-An overview.
  • Haile, Beyene Girma; Jahren, Jens & Hellevang, Helge (2017). New insights about thermally driven diagenetic changes due to the emplacement of magmatic sills into reservoir sediments at Wilhelmøya (Svalbard): Implications for reservoir quality.
  • Haile, Beyene Girma; Klausen, Tore Grane; Czarniecka, Urszula; Xi, Kelai; Jahren, Jens; Braathen, Alvar & Hellevang, Helge (2017). Diagenesis of Upper Triassic sandstones, Edgeøya, Svalbard.
  • Line, Lina Hedvig; Jahren, Jens & Hellevang, Helge (2017). Diagenesis and Reservoir Quality of Anisian and Carnian channels in the southwestern Barents Sea.
  • Line, Lina Hedvig; Jahren, Jens & Hellevang, Helge (2017). Reservoir characterization of Triassic sandstones in the southwestern Barents Sea.
  • Moghadam, Javad Naseryan; Mondol, Nazmul Haque; Aagaard, Per & Hellevang, Helge (2017). Determination of CO2-Brine relative permeability curves for CO2 storage sandstone reservoirs.
  • Nooraiepour, Mohammad; Fazeli, Hossein & Hellevang, Helge (2017). Effect of CO2 phase state and flow rate on salt formation in shale caprocks – a microfluidics study.
  • Sundal, Anja; Miri, Rohaldin; Hellevang, Helge; Tveranger, Jan; Midtkandal, Ivar; Zuchuat, Valentin; Aagaard, Per & Braathen, Alvar (2017). Movement of CO 2 Charged Fluids in Low Permeability Rocks During Deformation: Migration Patterns in the Carmel Formation, Utah. Energy Procedia.  ISSN 1876-6102.  s 4537- 4544 . doi: 10.1016/j.egypro.2017.03.1570
  • Zuchuat, Valentin; Midtkandal, Ivar; Braathen, Alvar; Sundal, Anja; Skurtveit, Elin; Hellevang, Helge; Tveranger, Jan; Evans, James & Petrie, Elizabeth (2017). COPASS - CO2 seal bypass.
  • Haile, Beyene Girma; Klausen, Tore Grane; Hellevang, Helge; Jahren, Jens & Bjørlykke, Knut (2016). Burial diagenesis of De Geerdalen Formation control by depositional facies distribution, Edgeøya, Svalbard.
  • Sundal, Anja; Miri, Rohaldin; Hellevang, Helge; Tveranger, Jan; Midtkandal, Ivar; Zuchuat, Valentin & Braathen, Alvar (2016). Movement of CO2 charged fluids in low permeability rocks during deformation: migration patterns in the Carmel Formation, Utah.
  • Sundal, Anja; Petrie, Elizabeth; Hellevang, Helge; Midtkandal, Ivar & Braathen, Alvar (2016). REACTIVE FLUID EXPULSION DURING PROGRESSIVE DEFORMATION IN THE FOLD LIMB OF THE SAN RAFAEL SWELL, UTAH, USA. Show summary
  • Sætre, Christian; Dypvik, Henning & Hellevang, Helge (2016). Basaltic glass alteration and its reservoir importance.
  • Sætre, Christian; Dypvik, Henning; Hellevang, Helge & Werner, Stephanie C. (2016). Earth Mars Analogues - Linking experimental and Martian clays.
  • Braathen, Alvar; Anell, Ingrid Margareta; Smyrak-Sikora, Aleksandra Anna; Mulrooney, Mark; Haile, Beyene Girma; Ogata, Kei; Osmundsen, Per Terje; Maher, Harmon; Buckley, Simon John; Hellevang, Helge & Olaussen, Snorre (2015). Tectonic influence on platform infill patterns in the mid-late Triassic, Southern Edgeøya, Svalbard.
  • Haile, Beyene Girma; Xi, Kelai; Jahren, Jens; Aagaard, Per; Bjørlykke, Knut & Hellevang, Helge (2015). Burial Diagenesis in Triassic Sandstones: key to understand reservior quality evolution.
  • Haile, Beyene Girma; Xi, Kelai; Jahren, Jens; Aagaard, Per; Bjørlykke, Knut & Hellevang, Helge (2015). Burial diagenesis in Triassic siliciclastic reservoirs of the Barents Sea region.
  • Hellevang, Helge (2015). Carbon capture and storage (CCS), In Knut Bjørlykke (ed.),  Petroleum Geoscience. From sedimentary environments to rock physics - second edition.  Encyclopedia of Global Archaeology/Springer Verlag.  ISBN 978-3-642-34131-1.  Kapittel 24.  s 591 - 602
  • Hellevang, Helge (2015, 18. juni). Hva bestemmer isotopsignaturen til karbon i atmosfæren?. [Internett].  geoforskning.no.
  • Hellevang, Helge & Aagaard, Per (2015, 21. april). Kort oppholdstid for karbon i atmosfæren – bevis mot menneskeskapte utslipp?. [Internett].  geoforskning.no.
  • Hellevang, Helge; Krafft, Charlotte Gannefors & Dalsbø, Gudmund Anders (2015). FME SUCCESS WP1 – Reservoir.
  • Midtkandal, Ivar; Braathen, Alvar; Hellevang, Helge; Skurtveit, Elin & Tveranger, Jan (2015). COPASS - CO2 seal bypass.
  • Miri, Rohaldin; Hellevang, Helge; Aagaard, Per & Wangen, Magnus (2015). Effects of CO2-Brine-Rock Interactions on CO2 Injectivity - Implications for CCS.
  • Miri, Rohaldin & Hellevang, Helge (2014). Developments in SAFT EOS for Carbon Capture and Storage (CSS).
  • Moghadam, Javad Naseryan; Mondol, Nazmul Haque; Hellevang, Helge; Johnsen, Øistein & Aagaard, Per (2014). Seismic response of CO2 saturated Red Wildmoor Sandstone under varying temperatures and pressures. EarthDoc.  (Tu G107)
  • Sundal, Anja; Hellevang, Helge; Miri, Rohaldin & Aagaard, Per (2014). On layer specific CO2 plume distributions and variability in mineralization potential.
  • Sundal, Anja; Hellevang, Helge; Miri, Rohaldin; Dypvik, Henning; Nystuen, Johan Petter & Per, Aagaard (2014). Variations in mineralization potential for CO2 related to sedimentary facies and burial Depth - a comparative study from the North Sea. Energy Procedia.  ISSN 1876-6102.
  • Hellevang, Helge; Jahren, Jens; Haile, Beyene Girma & Aagaard, Per (2013). On the kinetics of digenetic reactions – Diffusion /transport limitations on the K-feldspar to illite conversion during burial diagenesis.
  • Jahren, Jens; Haile, Beyene Girma; Hellevang, Helge; Bjørlykke, Knut & Ohm, Sverre Ekrene (2013). Fracture Patterns in Organic Rich Mudstones - Implications for Primary Petroleum Migration. EarthDoc. . doi: 10.3997/2214-4609.20130098
  • Jahren, Jens; Haile, Beyene Girma; Hellevang, Helge & Kjemperud, Audun (2013). Formation of potentially porosity preserving grain coats in Brent and Dunlin age sandstones from the Northeastern North Sea area-A combined petrographic and hydrothermal synthesis study of samples from the Gjøa and Agat areas.
  • Naseryan-Moghadam, Javad; Aagaard, Per; Mondol, Nazmul Haque & Hellevang, Helge (2013). Determination of the Biot’s coefficient for the permeability of DeGeerdalen and Knorringfjellet sandstones, two consolidated formations for CO2 sequestration in Svalbard area.
  • Dypvik, Henning; Hellevang, Helge & Kalleson, Elin (2012). Alteration of impact melts.
  • Dypvik, Henning; Hellevang, Helge & Kalleson, Elin (2012). Alteration of impact melt - implications for our understanding of Noachian of Mars?.
  • Hellevang, Helge (2012). Pressures and their mechanisms governing loading of P fractions.
  • Dypvik, Henning; Hellevang, Helge & Kalleson, Elin (2011). From impact melt to clays; experiments and speculations.
  • Dypvik, Henning; Hellevang, Helge & Kalleson, Elin (2011). The alteration of impact melt - a first step.
  • Aagaard, Per; Hellevang, Helge; Alemu, Binyam Lema & Pham, Van Thi Hai (2011). On the potential for secondary carbonate growth in sedimentary basins.
  • Alemu, Binyam Lema; Aagaard, Per & Hellevang, Helge (2011). Effect of temperature and mineralogical composition on the reactivity of shale: A comparison study of potential caprock from two potential CO2 storage sites.
  • Bjørlykke, Knut; Hellevang, Helge & Aagaard, Per (2011). Konsekvensene av surere hav.Noen geokjemiske betraktninger av betydning for livet i havet. Biologen.  2, s 28- 34
  • Hellevang, Helge; Alemu, Binyam Lema & Aagaard, Per (2011). Mobilization of elements by CO2-mineral interactions.
  • Hellevang, Helge; Thyberg, Brit Inger & Jahren, Jens (2011). Albite precipitation in mudstones – comparison of natural and synthetic systems.
  • Huang, Shanshan; Hellevang, Helge & Thorseth, Ingunn Hindenes (2011). Hydrogen production from low temperature olivine alteration.
  • Pham, Van Thi Hai; Hellevang, Helge & Aagaard, Per (2011). On the potential for CO2 mineral storage in continental flood basalts.
  • Hellevang, Helge; Jahren, Jens; Aagaard, Per & Thyberg, Brit Inger (2010). On spatial-temporal variations of secondary phases formed during mud diagenesis.
  • Sokalska, Ewa Teresa; Hellevang, Helge & Aagaard, Per (2010). CHLORITE INTERACTION WITH ACID FLUID.
  • Sokalska, Ewa Teresa; Hellevang, Helge & Aagaard, Per (2010). ROZKŁAD CHLORYTU W KWAŚNYCH ROZTWORACH.
  • Sokalska, Ewa Teresa; Hellevang, Helge; Alemu, Binyam Lema; Aagaard, Per; Dubińska, Elżbieta & Kaproń, Grzegorz (2010). Chlorite dissolution and carbonate precipitation under hydrothermal conditions. NGF Abstracts and Proceedings of the Geological Society of Norway.  1, s 184- 184
  • Sokalska, Ewa Teresa; Hellevang, Helge; Alemu, Binyam Lema; Aagaard, Per; Dubińska, Elżbieta & Kaproń, Grzegorz (2010). Chlorite dissolution and carbonate precipitation under hydrothermal conditions.
  • Hellevang, Helge & Aagaard, Per (2010). Can carbonate precipitation rates be derived from dissolution rate data?. Geochimica et Cosmochimica Acta.  ISSN 0016-7037.  74(12), s A396- A396
  • Hellevang, Helge & Aagaard, Per (2010). On the use of Transition-State-Theory (TST) to predict the potential for carbonate growth in sedimentary basins.
  • Hellevang, Helge; Declercq, Julien & Aagaard, Per (2010). Carbonation of forsterite at 10 to 18.5 bar PCO2and 85 to 150C –Comparisons of numerical simulations and laboratory experiments.
  • Hellevang, Helge; Pham, Van Thi Hai & Aagaard, Per (2010). Can carbonate precipitation rates be derived from dissolution rate data?.
  • Pham, Van Thi Hai; Hellevang, Helge & Aagaard, Per (2010). On the potential of carbonate formation during CO2 storage. The Utsira case revised.
  • Aagaard, Per; Austrheim, Håkon Olav & Hellevang, Helge (2009). CO2 sequestration in serpentinized peridotite - thermodynamic modelling of a natural occurence.
  • Aagaard, Per; Hellevang, Helge & Jahren, Jens (2009). Burial diagenesis of siliciclastic reservoirs and control on formation water chemistry. Geochimica et Cosmochimica Acta.  ISSN 0016-7037.  73(13), s A1- A1
  • Aagaard, Per; Pham, Van Thi Hai & Hellevang, Helge (2009). A modeling study of the long-term mineral trapping in deep saline marine sands aquifers.
  • Hellevang, Helge; Declercq, Julien & Aagaard, Per (2009). Why is dawsonite absent in CO2 charged reservoirs?.
  • Hellevang, Helge; Sokalska, Ewa Teresa & Aagaard, Per (2009). Hydration of forsterite at 1 atm PCO2 and 80 to 120 degrees C - Comparisons of numerical simulations and laboratory experiments to understand the factors that govern the overall mineral transformation rate. Geochimica et Cosmochimica Acta.  ISSN 0016-7037.  73(13), s A518- A518
  • Hellevang, Helge; Thorseth, Ingunn Hindenes & Pedersen, Rolf-Birger (2008). Can dissolving basaltic glass generate enough H2 to sustain a deep biosphere?.
  • Hellevang, Helge & Kvamme, Bjørn (2007). ACCRETE - An explicit algorithm to solve kinetically constrained CO2-water-rock interactions.
  • Pedersen, Rolf Birger; Thorseth, Ingunn Hindenes; Knudsen, H.P; Schander, Christoffer; Butterfield, D.; Lelley, M.; Ona, E.; Økland, Ingeborg Elisabet; Hellevang, B. & Hellevang, Helge (2007). The 71N vent fields at the Arctic Mid-Ocean Ridge.

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Published Dec. 10, 2013 7:55 PM