Dimitrios Georgios Hatzignatiou

Selected Publications

• Okere, C.J., Hatzignatiou, D.G. and Wanambwa, S.: "Mitigating Injectivity Loss During Phase-coupled CO₂ Injection Into Depleted Gas Reservoirs: Mechanisms, Modeling, And Operational Guidelines". Paper SPE-231500-MS to be presented at the 2026 SPE Improved Oil Recovery Conference, Tulsa, Oklahoma, USA, April, 21-23.
• Wanambwa, S., Okere, C.J., and Hatzignatiou, D.G. "Experimental Advances and Innovations in Geological CO₂ Storage: Insights from Depleted Gas Reservoirs and Saline Aquifers. Paper submitted for journal publication.
• Donaire, A.M. and Hatzignatiou, D.G. "The Future of Hydrogen in Spain: A Monte Carlo Probabilistic Cost Analysis," International Journal of Green Energy. (Nov. 2025). https://doi.org/10.1080/15435075.2025.2584112.  
• Li, Z., Hatzignatiou, D.G. and Ehlig-Economides, C.: "Carbon Neutral Economic Viability of Enhanced CO2 Storage and Gas Recovery in Natural Gas Reservoirs Under Strong Bottom Water Drive." Paper SPE-225593-MS presented at the 2025 SPE Europe Energy Conference & Exhibition, Vienna, Austria (10-12 June 2025). Paper accepted for publication in SPE Journal.
• G. Yan, P.Ø. Andersen, Y. Qiao, D.G. Hatzignatiou and T. Kohl: "Impact of Wellbore Lateral Heat Transfer on the Performance of High-Temperature Aquifer Thermal Energy Storage System," European Association of Geoscientists & Engineers, IOR+ 2025 - 23rd European Symposium on IOR, Apr 2025, Volume 2025, p.1 - 10, DOI: https://doi.org/10.3997/2214-4609.202531057
• Yan, G., Andersen, P.Ø, Qiao, Y., Hatzignatiou, D.G., Feng, B., and Kohl, T.: "Investigating the Impact of Wellbore Lateral Heat Transfer on the Performance of High-Temperature Aquifer Thermal Energy Storage System by the Coupling of Wellbore and Reservoir Simulators." Geoenergy Science and Engineering, Available online 2 April 2025, 213874 https://www.sciencedirect.com/science/article/pii/S2949891025002325
• Aruah, B., Seema, A., Hatzignatiou, D.G., and Sakhaee-Pour, A.: "Prediction of CO2 Breakthrough Pressure Through a Shale Caprock Formation – A Machine Learning Approach." Paper under review for Journal publication.
• Mukhtar, M., Hatzignatiou, D.G., and Ehlig-Economides, C.: “Extended Aquifer System Pressure Behavior Under Carbon Storage,” SPE 214868-PA. SPE J. Journal (June 2024). ). https://doi.org/10.2118/214868-PA.
• Yan, G., Andersen, P.Ø, Qiao, Y., Hatzignatiou, D.G., Nitschke, F., Spitzmüller, L., and Kohl, T.: "Simulation of Temperature-Reporting Nanoparticle Tracers for Fractured Geothermal Reservoirs Characterization." European Association of Geoscientists & Engineers, June 2024. https://doi.org/10.3997/2214-4609.202410850.
• Aruah, B., Sakhaee-Pour, A., and Hatzignatiou, D.G.: "Alteration of pore structure and effects on critical properties of shale formations undergone cryogenic thermal shock." Geoenergy Science and Engineering. June 2024. https://doi.org/10.1016/j.geoen.2024.213002. 
• Yan, G., Andersen, P.Ø, Qiao, Y., Hatzignatiou, D.G., Nitschke, F., Spitzmüller, L., and Kohl, T.: "Numerical modeling of temperature-reporting nanoparticle tracer for fractured geothermal reservoir characterization." Geoenergy Science and Engineering, March 2024. https://doi.org/10.1016/j.geoen.2024.212787. 
• Aruah, B., Sakhaee-Pour, A., Hatzignatiou, D.G., Sadooni, F., and Al-Kuwari, H.: "Altering Shale Permeability by Cold Shock." Gas Science and Engineering, March 2024. https://doi.org/10.1016/j.jgsce.2024.205291. 
• Li, Z., Hatzignatiou, D.G., and Ehlig-Economides, C.: "Carbon Dioxide Storage in a Natural Gas Reservoir under Strong Bottom Water Drive." SPE-CCUS-2024-4012897. SPE-AAPG-SEG CCUS Conference, March 11-13, 2024, Houston TX, USA. https://doi.org/10.15530/ccus-2024-4012897.
• Qiao, Y. and Hatzignatiou, D.G.: "Analytical Solution for Chemical Fluid Injection into Linear Heterogeneous Porous Media Based on the Method of Characteristics." Chemical Engineering Science (2023). https://www.sciencedirect.com/science/article/pii/S000925092300893X?dgcid=author. 
• Mukhtar, M., Hatzignatiou, D.G., and Ehlig-Economides, C.: “Extended Aquifer System Pressure Behavior Under Carbon Storage,” SPE 214868-MS, SPE ATCE, San Antonio TX, Oct. 16-18, 2023. https://doi-org.ezproxy.lib.uh.edu/10.2118/214868-MS. 
• Ehlig-Economides, C. and Hatzignatiou, D.G., "Energy Analysis of Low Carbon Hydrogen from Methane and End Use Implications", Energy & Fuels, 2022. https://doi.org/10.1021/acs.energyfuels.2c01258. 
• Hatzignatiou, D.G. and Ehlig-Economides, C.: "Coupled Enhanced Natural Gas Recovery and Blue Hydrogen (EGRBH) Generation," paper SPE-210356-MS, SPE Annual Technical Conference and Exhibition (ATCE), Houston, TX, Oct. 3 - 5, 2022. https://doi.org/10.2118/210356-MS. 
• Song, W. and Hatzignatiou, D.G.: "On the Reduction of the Residual Oil Saturation through the Injection of Polymer and Nanoparticle Solutions," Journal of Petroleum Science and Engineering, 208, Part B, 109430 (Jan. 2022). https://doi.org/10.1016/j.petrol.2021.109430
• Ehlig-Economides, C. and Hatzignatiou, D.G., "Blue Hydrogen Economy - A New Look at an Old Idea," paper SPE-206282-MS, SPE Annual Technical Conference and Exhibition (ATCE), Dubai, UAE, Sept. 21 - 23, 2021. https://doi.org/10.2118/206282-MS
• Askarinezhad, R., Hatzignatiou, D.G., and Stavland, A.: "Associative Polymers for Disproportionate Permeability Reduction – Formation Wettability Effects," PETROL 109060, Journal of Petroleum Science and Engineering (June 8, 2021). https://doi.org/10.1016/j.petrol.2021.109060 or https://authors.elsevier.com/a/1dFPv3HHl69lHA
• Zhou, Y., Hatzignatiou, D.G., Helland, J.O., Zhao, Y, and Cai, J. "Pore-Scale Modelling of Three-Phase Capillary Pressure Curves Directly in Uniformly Wet Rock Images". Geofluids, 2021 (6622079), 1-15, Jan. 6, 2021. https://doi.org/10.1155/2021/6622079
• Hatzignatiou, D.G.: "Sweep Improvements: Mobility and Conformance Control," Chalk Monograph, Chapter 20, 305 - 324 (September 2019).
• Olsen, H., Hatzignatiou, D.G., and Jørgensen, O.: "Reservoir Modeling in Naturally Fractured Carbonate Formations," Chalk Monograph, Chapter 13, 193 - 212 (September 2019).
• Hatzignatiou, D.G., Giske, N.H., and Stavland, A.: "Polymer and Polymer-Based Gelants for Improved Oil Recovery and Water Control Applications in Naturally Fractured Chalk Formations," Chemical Engineering Sciences, 187, 302 – 317, September 2018. https://doi.org/10.1016/j.ces.2018.04.064.
• Hatzignatiou, D.G. and Giske, N.H.: "Water-Soluble Sodium Silicate Gelants for Water Management in Naturally Fractured Carbonate Reservoirs," Chemical Engineering Research and Design, 132, 40-56, March 2018. https://doi.org/10.1016/j.cherd.2017.11.041.
• Askarinezhad, R., Hatzignatiou, D.G., and Stavland, A.: "Core-Based Evaluation of Associative Polymers as Enhanced Oil Recovery Agents in Oil-Wet Formations," ASME Journal of Energy Resources Technology, 140 (3), 032915-1 – 032915-9, JERT-17-1418, 2018. doi:10.1115/1.4038848. http://energyresources.asmedigitalcollection.asme.org/article.aspx?articleid=2668240.
• Hatzignatiou, D.G., Giske, N.H., and Strand, D.: “Water-Soluble Silicate Gelants: Comparison and Screening for Conformance Control in Carbonate Naturally Fractured Reservoirs,” Journal of Non Crystalline Solids, 479 (1), 72-81, January 2018. https://doi.org/10.1016/j.jnoncrysol.2017.10.024.
• Zhou, Y., Hatzignatiou, D.G., and Helland, J.O. “On the Estimation of CO2 Capillary Entry Pressure: Implications on Geological CO2 Storage.” Journal of Greenhouse Gas Control, 63, 26-36, August (2017). https://doi.org/10.1016/j.ijggc.2017.04.013.
• Askarinezhad, R., Hatzignatiou, D.G., and Stavland, A.: "Disproportionate Permeability Reduction of Water-Soluble Silicate Gelants - Importance of Formation Wettability," SPE 179589-MS, SPE Improved Oil Recovery Conference, Tulsa Oklahoma, April 9-13, 2016; SPE 179589-PA, SPE Production and Operations, 32 (03), 362-373, Aug. 2017. DOI: 10.2118/179589-PA. https://doi.org/10.2118/179589-PA.
• Askarinezhad, R., Hatzignatiou, D.G., and Stavland, A.: "Associative Polymers as Enhanced Oil Recovery Agents in Oil-Wet Formations: A Laboratory Approach," EAGE paper, IOR NORWAY 2017 - 19th European Symposium on Improved Oil Recovery, Stavanger, Norway, 24-27 Apr., 2017. https://www.earthdoc.org/content/papers/10.3997/2214-4609.201700275
• Askarinezhad, R. and Hatzignatiou, D.G..: "Improved Disproportionate Permeability Reduction of Silicate-Gelant Treatments: A Laboratory Scale Approach," SPE 184563-MS, SPE International Conference on Oilfield Chemistry, Montgomery, Texas, USA, 3-5 Apr., 2017. https://doi.org/10.2118/184563-MS.
• Jolma, I.W., Strand, D., Stavland, A., Fjelde, I. and Hatzignatiou, D.G., "When Size Matters - Polymer Injectivity in Chalk Matrix," IOR 2017 - 19th European Symposium on Improved Oil Recovery, Stavanger, Norway, 24-27 Apr., 2017. https://www.earthdoc.org/content/papers/10.3997/2214-4609.201700362.
• Zhou, Y., Helland, J.O., Hatzignatiou, D.G., Ashan, R., and Hiorth, A.: "Experimental Validation of a Pore-Scale Derived Dimensionless Capillary Pressure Function for Imbibition Under Mixed-Wet Conditions," SPE 180088-MS, SPE/EAGE EUROPEC meeting, Vienna, Austria, 30 May - 2 June 2016. Paper SPE 180088-PA, SPE Journal, 22 (5), 1338 – 1348, February 2017. DOI: 10.2118/180088-PA. https://doi.org/10.2118/180088-PA.
• Pham, L.T. and Hatzignatiou, D.G.: “Rheological Evaluation of Sodium Silicate Gel for Water Management in Mature, Naturally-Fractured Oilfields,” J. of Pet. Sci. & Eng., 138, 218-233 (2016). https://doi.org/10.1016/j.petrol.2015.11.039.
• Hatzignatiou, D.G., Askarinezhad, R., Giske, N.H., and Stavland, A.: “Laboratory Testing of Environmentally Friendly Chemicals for Water Management," SPE-173853-MS, SPE Bergen One Day Seminar (April 22, 2015). Paper SPE-173853-PA SPE Production & Operations, 31 (04), 1930-1855, November 2016. DOI: 10.2118/173853-PA. https://doi.org/10.2118/173853-PA.
• Askarinezhad, R. and Hatzignatiou, D.G.: "Water-Soluble Silicate Gelants for Disproportionate Permeability Reduction: Importance of Formation Wetting and Treatment Conditions," SCA 2016-071, International Symposium of the Society of Core Analysts, Snow Mass, Colorado, USA, 21-26 August 2016. http://www.jgmaas.com/SCA/2016/SCA2016-071.pdf.
• Hatzignatiou, D.G. and Giske, N.H.: "Water-Soluble Sodium Silicate Gelants for Water Management in Naturally Fractured Carbonate Reservoirs," SPE 180128-MS, SPE/EAGE EUROPEC Conference and Exhibition, Vienna, Austria, 30 May - 2 June 2016. https://doi.org/10.2118/180128-MS.
• Hatzignatiou, D.G., Giske, N.H., and Stavland, A.: "Polymer and Polymer-Based Gelants for Improved Oil Recovery and Water Control Applications in Naturally Fractured Chalk Formations," SPE 180024-MS, SPE Bergen One Day Seminar, Bergen, Norway, 20 April 2016. https://doi.org/10.2118/180024-MS.
• Hatzignatiou, D.G., Moradi, H., and Stavland, A.: “Polymer Flow through Water- and Oil-Wet Porous Media,” Journal of Hydrodynamics, 27 (5), 748-762 (2015). DOI: 10.1016/S1001-6058(15)60537-6. https://doi.org/10.1016/S1001-6058(15)60537-6.
• Havlova, V., Hladik, V., Hatzignatiou, D.G., and Francu, J.: “REPP-CO2: Static and Dynamic Laboratory Experiments with scCO2,” Goldschmidt 2015, Prague, Czech Republic (Aug. 16-21, 2015).
• Zhou, Y., Helland, J.O. and Hatzignatiou, D.G.: Computation of Three-Phase Capillary Pressure Curves and Fluid Configurations at Mixed-wet Conditions in 2D Rock Images,” SPE 170883, SPE Annual Technical Conference and Exhibition, Amsterdam, The Netherlands, Oct. 27-29, 2014. Paper SPE 170883-PA, SPE Journal. 21 (01), 152-169 (February 2016). DOI: 10.2118/170883-PA. https://doi.org/10.2118/170883-PA.
• Zhou, Y., Helland, J.O. and Hatzignatiou, D.G.: “Computation of Three-Phase Capillary Entry Pressures and Arc Menisci Configurations in Pore Geometries from 2D Rock Images: A Combinatorial Approach,” Advances in Water Resources, 69, July 2014, 49-64. doi: 10.1016/j.advwatres.2014.03.006. https://doi.org/10.1016/j.advwatres.2014.03.006.
• Manceau, J.-C., Hatzignatiou, D.G., De Lary, L., Jensen, N.B., and Révéillère, A. “Mitigation and remediation technologies and practices in undesired migration of CO2 from a geological storage unit - Current status,” International Journal of Greenhouse Gas Control, 22, 272–290 (2014); http://dx.doi.org/10.1016/j.ijggc.2014.01.007.
• Hatzignatiou, D.G., Helleren, J., and Stavland, A.: “Numerical Evaluation of Dynamic Core/Scale Experiments of Silicate Gels for Fluid Diversion and Flow-Zone Isolation,” SPE 170240-PA, SPE Production & Operations Journal, 29 (2), 122 – 138 (May 2014). DOI:10.2118/170240-PA. https://doi.org/10.2118/170240-PA.
• Zhou, Y., Helland, J.O. and Hatzignatiou, D.G. “On the Dependence of Capillary Entry Pressure on Subsurface Depth in Geological CO2 Storage,” Fourth EAGE CO2 Storage Workshop, Stavanger, Norway (April 23-25, 2014). https://www.earthdoc.org/content/papers/10.3997/2214-4609.20140074.
• Hatzignatiou, D.G., and Fjelde, I.; “Mature Oilfields Screening for CO2 EOR Utilization and Storage: A Case Study,” Fourth EAGE CO2 Storage Workshop, Stavanger, Norway (April 22-24, 2014). https://www.earthdoc.org/content/papers/10.3997/2214-4609.20140090.
• Hatzignatiou, D.G., Stavland, A., Khairil, R.R., and D. Wessel-Berg: “Foam Core Flooding: An Experimental and Numerical Modeling Approach,” paper accepted for publication (2014).
• Valestrand, R., Khrulenko A., and Hatzignatiou, D.G.: “Smart Wells for Improved Water Management in the Presence of Geological Uncertainty,” SPE 169223, SPE Bergen One Day Seminar Meeting, Bergen Norway (April 2, 2014). https://doi.org/10.2118/169223-MS.
• Silin, D., Ajo-Franklin, J., Helland, J.O., Jettestuen, E., and Hatzignatiou D.G.: Pore-Scale Study of the Impact of Fracture and Wettability on Two-Phase Flow Properties of Rock," LBNL Paper LBNL-5810E, April 21, 2014. http://escholarship.org/uc/item/5bn168r4
• Korre A., Delprat-Jannaud F., Welkenhuysen K., Piessens K., Falus G., Vähäkuopus T., Poulsen N., Wickström L., Alexandra D., Vincent C. J., Car M., Wójcicki A., Arts R., Vit H., Martinez R., Komatina S., Akervoll I., Brüstle A. K., Götzl G., Brikmane B., Hatzignatiou D.G., State-of-the-art of directives and regulatory regimes related to CO2 storage operational and safety risks. CGS Europe report No. D3.5, Korre, A. and Delprat-Jannaud F. (Eds.), January 2014, 115p. http://repository.cgseurope.net/eng/cgseurope/knowledge-repository/key-reports/operational.aspx.
• Hatzignatiou, D.G., Norris, U.L., and Stavland, A.: “Core-Scale Simulation of Polymer Flow through Porous Media,” J. of Pet. Sci. & Eng., 108, 137-150 (August 2013); doi:10.1016/j.petrol.2013.01.001. https://doi.org/10.1016/j.petrol.2013.01.001.
• Hatzignatiou, D.G., Moradi, H., and Stavland, A.: “Experimental Investigation of Polymer Flow through Water- and Oil-Wet Berea Sandstone Core Samples,” SPE 164844, SPE EUROPEC and EAGE Annual Meeting, London UK, June 10-13 (2013). https://doi.org/10.2118/164844-MS.
• Zhou, Y., Helland, J.O., and Hatzignatiou, D.G.: “Simulation of Three Phase Capillary Pressure Curves Directly in 2D Rock Images,” IPTC 16547, SPE IPTC Conference, Beijing China, March 26-28 (2013). https://doi.org/10.2523/IPTC-16547-MS.
• Jean-Charles Manceau, Dimitrios G. Hatzignatiou, Louis De Lary, Niels Bo Jensen, Kristin Flornes, Thomas Le Guénan, Arnaud Réveillère: Methodologies and Technologies for Mitigation of Undesired CO2 Migration in the Subsurface. Trondheim CCS Conference, Trondheim, Norway (June 4-6, 2013) http://programme.exordo.com/tccs-7/.
• Zhou, Y., Helland, J.O., and Hatzignatiou, D.G. “A Dimensionless Capillary Pressure Function for Imbibition Derived from Pore-Scale Modeling in Mixed-Wet Rock Images,” SPE-154129-PA, SPE Journal, 18 (2), 296-308 (December 2012). DOI: 10.2118/154129-PA. https://doi.org/10.2118/154129-PA.
• Zhou, Y., Helland, J.O., and Hatzignatiou, D.G. “Pore-Scale Modeling of Water Flooding in Mixed-Wet Rock Images: Effects of Initial Saturation and Wettability,” SPE 154284, 2012 SPE Improved Oil Recovery Symposium, Tulsa, Oklahoma, USA (Apr. 14-18); SPE Journal. SPE-154284-PA. DOI: 10.2118/154284-PA. https://doi.org/10.2118/154129-PA.
• Permata, P. and Hatzignatiou, D.G.: “Revitalizing Small Offshore Oil Assets – Field Redevelopment Feasibility Study,” J. of Pet. Sci. & Eng., 76, 3-4, 155–171 (March 2011); doi:10.1016/j.petrol.2011.01.007. https://doi.org/10.1016/j.petrol.2011.01.007.
• Hatzignatiou, D.G., Riis, F., Berenblyum, R., Hladik, V., Lojka, R., and Francu, J.: “Screening and Evaluation of a Saline Aquifer for CO2 Geological Storage – Central Bohemian Basin, Czech Republic,” International Journal of Greenhouse Gas Control, 5 (6), 1429-1442 (November 2011), doi:10.1016/j.ijggc.2011.07.013. https://doi.org/10.1016/j.ijggc.2011.07.013.
• Zhou, Y., Helland, J.O., and Hatzignatiou, D.G. “A model for imbibition in pore spaces from 2D Rock Images,” paper and poster presentation, International Conference on Flows and Mechanics in Natural Porous Media from Pore to Field Scale – Pore2Field, IFP Energies Nouvelles, Rueil-Malmaison, France (Nov. 16-18, 2011). https://www.researchgate.net/publication/266343874...
• Hladik, V., Hatzignatiou, D.G., Riis, F., Berenblyum, R., Gerslova, E., Francu, J., Lojka, R., Kolejka, V., and Gersl, M.: “Central Bohemian Basin as a Potential Carbon Dioxide Storage Site,” Reports on Geological Research in 2010, Czech Geological Survey, Prague, Czech Republic, 247-252 (2011) — In Czech.
• Helland, J.O., Jettestuen, E., Hatzignatiou, D.G., and Silin, D. "Three-Dimensional Level Set Modelling of Capillary-Controlled Displacements in Digital Porous Media," 2011 American Geophysical Union Annual Fall Meeting, San Francisco, California, USA, Dec. 5-9.
• Julie Lions, Ian Gale, Erik Nygaard, Heike Rütters, Franz May, Wolfram Kloppmann, Stanley Beaubien, Mehran Sohrabi, Dimitrios G. Hatzignatiou, Ludmilla Basava-Reddi.: "Potential Impacts on Groundwater Resources of Deep CO2 Storage," Geophysical Research Abstracts, Vol. 13, EGU2011-7087-5, (2011).
• Hatzignatiou, D.G. et al.: “Formation Damage and Well Productivity Simulation,” SPE 122241, 2009 European Formation Damage Conference, Scheveningen, The Netherlands (May 27-29); SPE Journal, 15 (3), 751-769, September (2010). DOI: 10.2118/122241-PA. https://doi.org/10.2118/122241-PA.
• Hatzignatiou, D.G. et al.: "A Field Laboratory for Monitoring CO2 Leakage," Energy Procedia, Greenhouse Gas Control Technologies, Science Direct, Elsevier, 1 (1), 2397-2404 (February 2009). https://doi.org/10.1016/j.egypro.2009.01.312.