Publications

Papers in Peer-reviewed Journals (*denotes corresponding author, **denotes student of the Geofluids & Hydrogeology lab)

  1. **C. Unigwe, *J. Vilcáez. Dolomite filtration for lithium and cobalt recovery from produced water: Feasibility and mechanistic insights. Hydrometallurgy, Vol. 243, 2026, Article 106746. doi.org/10.1016/j.hydromet.2026.106746.
  2. **A.J.B. Alhallaf, J. Vilcáez, Y. Liang. Investigating the impact of meteorological factors on sea-level variability in the northwestern Arabian Gulf: a case study using deep learning and advanced statistical models for enhanced forecasting. Ocean Modelling, (2025) Article 102648. doi.org/10.1016/j.ocemod.2025.102648.
  3. **M. Elshebli, *J. Vilcáez, J. Smay. Lithium and cobalt recovery from petroleum produced water using dolomite: impact of pH, temperature, and surface area. Science of the Total Environment, Vol 1003, 2025, Article 180743. doi.org/10.1016/j.scitotenv.2025.180743.
  4. **A.J.B. Alhallaf, J. Vilcáez, P. Rudra, A.A. Lafta. Predicting sea level variations for early warning using SARIMA model and deep learning techniques in the northwest Arabian Gulf. Discovery Geosciences, (2025) 3:158. doi.org/10.1007/s44288-025-00270-y.
  5. *J. Vilcáez, **E. Chowdhury. Biogenic hydrogen production from oil hydrocarbons at geological carbon storage conditions. Energy Conservation and Management, Vol 235, 2025, Article 119438. doi.org/10.1016/j.enconman.2024.119438.
  6. **O. Ishola, *J. Vilcáez. Augmenting X-ray micro-CT data with MICP data for high resolution pore-scale simulations of flow properties of carbonate rocks. Geoenergy Science and Engineering, Vol. 239, 2024, Article 212982. doi.org/10.1016/j.geoen.2024.212982.
  7. **K. Omar, *J. Vilcáez. The role of alkalinity on metals removal from petroleum produced water by dolomite. Applied Geochemistry, 2023. Article 105879. doi.org/10.1016/j.apgeochem.2023.105879.
  8. A. Arshad, *A. Mirchi, J. Vilcáez, M. U. Akbar, K. Madani. Reconstructing high-resolution groundwater level data using hybrid randon forest model to quantify distributed groundwater changes in the Indus Basin. Journal of Hydrology, Vol. 628, Article 130535, 2023. doi.org/10.1016/j.jhydrol.2023.130535.
  9. **K. Omar, *J. Vilcáez. Transport of Ba, Sr, Cd, Pd, and As in dolomite saline aquifers injected with petroleum produced water. Geoenergy Science and Engineering, Vol. 231, Part A, Article 21234, 2023. doi.org/10.1016/j.geoen.2023.212342.
  10. **V. Ezennubia, *J. Vilcáez. Removal of oil hydrocarbons from petroleum produced water by indigenous oil degrading microbial communities. Journal of Water Process Engineering, Vol 51, 2023, Article 103400. doi.org/10.1016/j.jwpe.2022.103400.
  11. **O. Ishola, A. Alexander, *J. Vilcáez. Statistical and neural network analysis of the relationship between the stochastic nature of pore connectivity and flow properties of heterogeneous rocks. Journal of Natural Gas Science and Engineering, Vol. 105, Article 104719, 2022.  doi.org/10.1016/j.jngse.2022.104719.
  12. *J. Vilcáez. System and method of removing oil and toxic metals from petroleum produced water. US Patent App. 17/526,734, 2022.
  13. **O. Ishola, *J. Vilcáez. Machine learning modeling of permeability in 3D heterogeneous porous media using a novel stochastic pore-scale simulation approach. Fuel, Vol 321, 2022, 124044. doi.org/10.1016/j.fuel.2022.124044.
  14. **K. Omar, *J. Vilcáez. Removal of toxic metals from petroleum produced water by dolomite filtration. Journal of Water Process Engineering, Vol. 47, 2022, 102982. doi.org/10.1016/j.jwpe.2022.102682.
  15. **B. Shabani, J. Pashin, *J. Vilcáez. TOUGHREACT-CO2Bio – A new module to simulate geological carbon storage under biotic conditions (Part 2): The bio-geochemical reactive transport of CO2-CH4-H2-H2S gas mixtures. Journal of Natural Gas Science and Engineering, Vol. 76, 2020, 103190. doi.org/10.1016/j.jngse.2020.103190.
  16. A. Yadav, J. Vilcáez, I.F. Farag, B. Johnson, K. Mueller, N.H. Youssef, *M.S. Elshahed. Candidatus Mcinerneyibacterium aminivorans gen. nov., sp. nov., the first representative of the candidate phylum Mcinerneyibacteriota phyl. nov. recovered from a high temperature, high salinity tertiary oil reservoir in north central Oklahoma, USA. Systematic and Applied Microbiology, Vol. 43, 2020, 126057. doi.org/10.1016/j.syapm.2020.126057.
  17. *J. Vilcáez. Reactive transport modeling of produced water disposal into dolomite aquifers: Controls of barium transport. Journal of Contaminant Hydrology, Vol. 233, 2020, 103600. doi.org/10.1016/j.jconhyd.2020.103600.
  18. **B. Shabani, *J. Vilcáez. TOUGHREACT-CO2Bio – a new module to simulate geological carbon storage under biotic conditions (Part 1): the multiphase flow of CO2-CH4-H2-H2S gas mixtures. Journal of Natural Gas Science and Engineering. Vol. 63, 2019, pp. 85-94. doi.org/10.1016/j.jngse.2019.01.013.
  19. **P. Ebrahimi, *J. Vilcáez. Transport of barium in fractured dolomite and sandstone saline aquifers. Science of the Total Environment, Vol. 647, 2019, pp. 323-333.  doi.org/10.1016/j.scitotenv.2018.08.008.
  20. *J. Vilcáez, **J. York, N. Youssef, M. Elshahed. Stimulation of methanogenic crude oil biodegradation in depleted oil reservoirs. Fuel, Vol. 232, 2018, pp. 581-590. doi.org/10.1016/j.fuel.2018.06.018.
  21. **P. Ebrahimi, *J. Vilcáez. Petroleum produced water disposal: Mobility and transport of barium in sandstone and dolomite rocks. Science of the Total Environment, Vol. 634, 2018, pp. 1054-1063. doi.org/10.1016/j.scitotenv.2018.04.067.
  22. **P. Ebrahimi, *J. Vilcáez. Effect of brine salinity and guar gum on the transport of barium through dolomite rocks: implications for unconventional oil and gas wastewater disposal. Journal of Environmental Management, 2018. Vol. 214, 2018, pp. 370-378. doi.org/10.1016/j.jenvman.2018.03.008.
  23. **B. Shabani, *J. Vilcáez. A fast and robust TOUGH2 module to simulate CO2 storage in saline aquifers. Computers & Geosciences, Vol. 111, 2018, pp. 58-66. doi.org/10.1016/j.cageo.2017.10.012.
  24. *J. Vilcáez, S. Morad, N. Shikazono. Pore-scale simulation of transport properties of carbonate rocks using FIB-SEM 3D microstructure: implications for field scale solute transport simulations. Journal of Natural Gas Science and Engineering, Vol. 42, 2017, pp. 13-22. doi.org/10.1016/j.jngse.2017.02.044.
  25. **B. Shabani, *J. Vilcáez. Prediction of CO2-CH4-H2S-N2 gas mixtures solubility in brine using a non-iterative fugacity-activity model relevant to CO2-MEOR. Journal of Petroleum Science and Engineering, Vol. 150, 2017, pp. 162-179. doi.org/10.1016/j.petrol.2016.12.012.
  26. *J. Vilcáez. Numerical modeling and simulation of microbial methanogenesis in geological CO2 storage sites. Journal of Petroleum Science and Engineering, Vol. 135, 2015, pp. 583-595. doi.org/10.1016/j.petrol.2015.10.015.
  27. *J. Vilcáez. Stimulating effect of protein-rich matter on the biogenic conversion of CO2 to CH4. Journal of CO2 Utilization, Vol. 10, 2015, pp. 60-66. doi.org/10.1016/j.jcou.2015.04.002.
  28. *J. Vilcáez. On the mechanism of chalcopyrite bioleaching with thermophiles. Austin J. Earth Sci. 2015; 2(2): id1014.
  29. V. Attavitkamthorn, *J. Vilcáez, K. Sato. Metamodeling of gas flooding EOR in Pattani Basin, Thailand. Journal of the Japanese Association for Petroleum Technology, Vol. 78, Issue 6, 2013, pp. 508-519. doi.org/10.3720/japt.78.508.
  30. H. Kobayashi, N. Saito, K. Fu, H. Kawaguchi, J. Vilcáez, T. Wakayama, H. Maeda, *K. Sato. Bio-electrochemical property and phylogenetic diversity of microbial communities associated with bioelectrodes of an electromethanogenic reactor. Journal of Bioscience and Bioengineering, Vol. 116, Issue 1, 2013, pp. 114-117. doi.org/10.1016/j.jbiosc.2013.01.001.
  31. *J. Vilcáez, *L. Li, S.S. Hubbard. A new model for the biodegradation kinetics of oil droplets: application to the Deepwater Horizon oil spill in the Gulf of Mexico‏. Geochemical Transactions, Vol. 14, Issue 4, 2013. doi.org/10.1186/1467-4866-14-4.
  32. Q. Fu, H. Kobayashi, H. Kawaguchi, J. Vilcáez, H. Wakayama, H. Maeda, *K. Sato. Electrochemical and phylogenetic analyses of current-generating microorganisms in a thermophilic microbial fuel cell. Journal of Bioscience and Bioengineering, Vol. 115, Issue 3, 2013, pp. 268-271. doi.org/10.1016/j.jbiosc.2012.10.007.
  33. *J. Vilcáez, L. Li, D. Wu, S.S. Hubbard. Reactive transport modeling of induced selective plugging by Leuconostoc mesenteroides in carbonate formations. Geomicrobiology Journal, Vol. 30, Issue 9, 2013, pp. 813-828. doi.org/10.1080/01490451.2013.774074.
  34. *J. Vilcáez, M. Watanabe, N, Watanabe, A. Kishita, T. Adschiri. Hydrothermal extractive upgrading of bitumen without coke formation. Fuel, Vol. 102, 2012, pp. 379-385. doi.org/10.1016/j.fuel.2012.07.024.
  35. P. Setiani, J. Vilcáez, N. Watanabe, A. Kishita, N. Tsuchiya. Enhanced hydrogen production from biomass via the sulfur redox cycle under hydrothermal conditions. International Journal of Hydrogen Energy, Vol. 36, Issue 17, 2011, pp. 10674-10682. doi.org/10.1016/j.ijhydene.2011.06.012.
  36. *J. Vilcáez, T. Watanabe. Inhibitory effect of gamma-irradiated chitosan on the growth of denitrifying bacteria. International Journal of Microbiology, Vol. 2009, Article ID 418595. dx.doi.org/10.1155/2009/418595.
  37. *J. Vilcáez, C. Inoue. Mathematical modeling of thermophilic bioleaching of chalcopyrite. Minerals Engineering, Vol. 22, Issue 11, 2009, pp. 951-960. doi.org/10.1016/j.mineng.2009.03.001.
  38. *J. Vilcáez, R. Yamada, C. Inoue. Effect of pH reduction and ferric ion addition on the leaching of chalcopyrite at thermophilic temperatures. Hydrometallurgy, Vol. 96, Issues 1-2, 2009, pp. 62-71. doi.org/10.1016/j.hydromet.2008.08.003.
  39. *J. Vilcáez, K. Suto, C. Inoue. Response of thermophiles to the simultaneous addition of sulfur and ferric ion to enhance the bioleaching of chalcopyrite. Minerals Engineering, Vol. 21, Issue 15, 2008, pp. 1063-1074. doi.org/10.1016/j.mineng.2007.11.005.
  40. *J. Vilcáez, K. Suto, C. Inoue. Modeling the auto-thermal performance of a thermophilic bioleaching heap employing mesophilic and thermophilic microbes. Hydrometallurgy, Vol. 94, Issues 1-4, 2008, pp. 82-92. doi.org/10.1016/j.hydromet.2008.05.007.
  41. *J. Vilcáez, K. Suto, C. Inoue. Bioleaching of chalcopyrite with thermophiles. Temperature-pH-ORP dependence. International Journal of Mineral Processing, Vol. 88, Issues 1-2, 2008, pp. 37-44. doi.org/10.1016/j.minpro.2008.06.002.
  42. *J. Vilcáez, S. Miyazawa, K. Suto, C. Inoue. Numerical evaluation of biocide treatment against sulfate reducing bacteria in oilfield water pipelines. Journal of the Japan Petroleum Institute, Vol. 50, No.4, 2007, pp. 208-217. doi.org/10.1627/jpi.50.208.

Papers in Peer-reviewed Conference Proceedings/Presentations (*denotes corresponding author)

  1. O. Ishola, J. Vilcáez. Predicting Permeability in Carbonate Rocks Using a Pore-Scale Stochastic Simulation Approach. Conference Proceedings, 82nd EAGE Annual Conference & Exhibition, July 2020, Vol. 2020, pp.1-5. doi.org/10.3997/2214-4609.202010360.
  2. V. Attavitkamthorn, J. Vilcáez, *K. Sato. Integrated CCS aspect into CO2 EOR project under wide range of reservoir properties and operating conditions. Energy Procedia, Vol. 37, 2013, pp. 6901-6908. GHGT-11. Kyoto-Japan. November 18-22, 2012. doi.org/10.1016/j.egypro.2013.06.622.
  3. K. Tanaka, J. Vilcáez, *K. Sato. Improvement of CO2 geological storage efficiency by injection and production well design. Energy Procedia, Vol. 37, 2103, pp. 4591-4597. GHGT-11. Kyoto-Japan. November 18-22, 2012. doi.org/10.1016/j.egypro.2013.06.367.
  4. Y. Kuramochi, Q. Fu, H. Kobayashi, M. Ikarashi, T. Wakayama, H. Kawaguchi, J. Vilcáez, H. Maeda, *K. Sato. Electromethanogenic CO2 conversion by subsurface-reservoir microorganisms. Energy Procedia, Vol. 37, 2013, pp. 7014-7020. GHGT-11. Kyoto-Japan. November 18-22, 2012. doi.org/10.1016/j.egypro.2013.06.636.
  5. M. Hara, H. Kobayashi, H. Kawaguchi, J. Vilcáez, *K. Sato. Mechanism of Electromethanogenic Reduction of CO2 by a Thermophilic Methanogen. Energy Procedia, Vol. 37, 2013, pp. 7006-7013. GHGT-11. Kyoto-Japan. November 18-22, 2012. doi.org/10.1016/j.egypro.2013.06.637.
  6. Q. Fu, Y. Onaka, H. Kobayashi, H. Kawaguchi, J. Vilcáez, *K. Sato. Identification of new microbial mediators for electromethanogenic reduction of geologically-stored carbon dioxide. Energy Procedia, Vol. 37, 2013, pp. 7021-7028. GHGT-11. Kyoto-Japan. November 18-22, 2012. doi.org/10.1016/j.egypro.2013.06.635.
  7. P. Setiani, J. Vilcáez, N. Watanabe, A. Kishita, *N. Tsuchiya. Sustainable and enhanced hydrogen production from biomass through sulfur redox cycle using georeactor. Geothermal Resources Council Transaction, Vol. 35, 2011, pp. 135-138. Geothermal Resources Council 35th Annual Meeting. San Diego-USA, October 23-26, 2011. https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1029227.
  8. A. Nuryadi, *A. Kishita, N. Watanabe, J. Vilcáez, N. Kawai. EOR simulation by in situ nitrogen production via denitrifying bacteria and performance improvement by nitrogen alternating surfactant injection. SPE Asia Pacific Oil & Gas Conference and Exhibition 2011. Jakarta-Indonesia. September 20-22, 2011. doi.org/10.2118/147823-MS.
  9. *J. Vilcáez, T. Watanabe. Antibacterial activity of gamma-irradiated chitosan against denitrifying bacteria. AIP Conference Proceedings Vol. 1251, 2010, pp. 161-164. 2nd International Symposium on Aqua Science, Water Resource and Low Carbon Energy. Sanya-China. December 7-10, 2009. doi.org/10.1063/1.3529265.
  10. *A. Kishita, J. Vilcáez, N. Watanabe. Observation of the heavy crude oil dissolution behavior under supercritical condition of water. Proceedings of International Petroleum Technology Conference, CD-ROM, 2009. IPTC 13898. Doha-Qatar. December 7-9, 2009. doi.org/10.2523/IPTC-13891-MS.
  11. *J. Vilcáez, K. Suto, C. Inoue. Studies on thermophilic bioleaching of chalcopyrite toward heap application. Advanced Materials Research, Vol. 71-73, 2009, pp. 357-360. 18th International Biohydrometallurgy Symposium. Bariloche-Argentine. September 13-17, 2009. doi.org/10.4028/www.scientific.net/AMR.71-73.357.
  12. *J. Vilcáez, C. Inoue. Mathematical modeling of the thermophilic bioleaching of chalcopyrite. Proceedings of Computational Modelling in Mineral processing, 2008, CD-ROM. Cape Town-South Africa. November 13-14, 2008 .
  13. *J. Vilcáez, K. Suto, C. Inoue. Bioleaching of chalcopyrite with thermophiles: temperature-pH-ORP dependence. In: Wang D.Z., et al. (Eds.) Proceedings of XXIV International Mineral Processing Congress, 2008, pp. 2779-2788. Beijing-China. September 23-28, 2008.
  14. *J. Vilcáez, R. Yamada, C. Inoue. Effect of pH reduction and ferric ion addition on the leaching of chalcopyrite at high temperatures. In: Young C.A., et al. (Eds.), Hydrometallurgy 2008, Proceedings of the Sixth International Symposium Honoring Robert S. Shoemaker, 2008, pp. 980-988. Phoenix-USA. August 17-20, 2008.
  15. *J. Vilcáez, K. Suto, C. Inoue. Modeling the auto-thermal performance of a thermophilic bioleaching heap employing mesophilic and thermophilic microbes. Advanced Materials Research Vol. 20-21, 2007, pp. 70-74. 17th International Biohydrometallurgy Symposium. Frankfurt am Main-Germany. September 2-5, 2007. doi.org/10.4028/www.scientific.net/AMR.20-21.70.
  16. *J. Vilcáez, K. Suto, C. Inoue. Response of thermophiles to the simultaneous addition of sulfur and ferric ion. Proceedings of 3rd International Symposium on Bio & Hydrometallurgy, 2007, CD-ROM. Falmouth-UK. May 1-2, 2007.
  17. *J. Vilcáez, K. Suto, C. Inoue. A numerical evaluation on the viability of heap thermophilic bioleaching. AIP Conference Proceedings, Vol. 898, 2007, pp. 217-222. 4th International Workshop on Water Dynamics. Sendai-Japan. November 7-8, 2006. doi.org/10.1063/1.2721284.
  18. *J. Vilcáez, C. Inoue. Enhancement and inhibition of bioleaching chalcopyrite with thermophiles. Proceedings of the symposium of the Mining and Materials Processing Institute of Japan, Spring-2009, pp. 215-216. Tokyo, Japan. March 26-28, 2009.
  19. *J. Vilcáez, K. Suto, C. Inoue. Chemical leaching of chalcopyrite at high temperatures and low pH. Proceedings of the symposium of the Mining and Materials Processing Institute of Japan, Spring-2008, pp. 185-186. Tokyo-Japan. March 27-29, 2008.
  20. *J. Vilcáez, K. Suto, C. Inoue. Effect of temperature on the bioleaching of chalcopyrite using thermophiles. Proceedings of the symposium of the Mining and Materials Processing Institute of Japan, Summer-2007, pp. 44. Nagoya-Japan. September 25-27, 2007.

Abstracts in Conference Proceedings/Presentations (*denotes corresponding author, **denotes student)

  1. **C. Unigwe, * J. Vilcáez. “Dolomite filtration of lithium and cobalt from petroleum produced water” GSA Connects 2025. San Antonio, Texas, USA, 19-22 October 2025. Poster presentation.
  2. **M. Elshebli, * J. Vilcáez. “Recovering lithium and cobalt from petroleum produced water using dolomite: pH, temperature, and surface area factors” GSA Connects 2025. San Antonio, Texas, USA, 19-22 October 2025. Poster presentation.
  3. **S. Senevirathna, * J. Vilcáez. “Stochastic Modeling and Pore Scale Simulation of Fluid Flow for Permeability Predictions in Carbonates” GSA Connects 2025. San Antonio, Texas, USA, 19-22 October 2025. Poster presentation.
  4. **E. Chowdhury, * J. Vilcáez. “Biogenic H2 production in depleted oil reservoirs used for geologic carbon storage”. AGU 2024. Washington D.C., USA, 9-13 December 2024. Poster presentation.
  5. **M. Elshebli, * J. Vilcáez. “Estimating zeta potential in dolomite-subsurface brine system for critical metal recovery from Oil Field Brine.” GSA Connects 2024. Anaheim, California, USA, 22-23 September 2024. Poster presentation.
  6. * J. Vilcáez, **Emranul Chowdhury. Modeling and simulation of hydrogen storage in depleted oil reservoirs under biotic conditions. GSA 2024 Joint North-Central and South-Central Section Meeting. Springfield, Missouri, USA, 21-23 April 2024. Poster presentation.
  7. **Chinanu Unigwe, * J. Vilcáez. Feasibility of critical metals recovery from petroleum produced water by dolomite. GSA 2024 Joint North-Central and South-Central Section Meeting. Springfield, Missouri, USA, 21-23 April 2024. Oral presentation.
  8. **O. Ishola, *J. Vilcáez. The significance of pore throat length in pore-scale fluid flow from the perspective of boundary layer theory. GSA South-Central Section Meeting. Stillwater, Oklahoma, USA, March 2023.
  9. **K. Omar, *J. Vilcáez. Dolomite filtration: a new method of removing toxic metals and metalloids from petroleum produced water. GSA South-Central Section Meeting. Stillwater, Oklahoma, USA, March 2023.
  10. *A. Arshad, A. Mirchi, J. Vilcáez. Reconstructing gap-filled groundwater level database for defective observational wells in the Irrigated Indus Basin. American Geophysical Union (AGU) Fall Meeting 2022. Chicago, Illinois, USA. December 12-16, 2022. Poster presentation.
  11. **O. Ishola, * J. Vilcáez. A numerical investigation into the effect of pore shapes on single-phase flow through heterogenous porous media. American Geophysical Union (AGU) Fall Meeting 2022. Chicago, Illinois, USA. December 12-16, 2022. Poster presentation.
  12. * J. Vilcáez **V. Ezennubia. Physicochemical controls of methanogenic oil degradation from petroleum produced water. American Geophysical Union (AGU) Fall Meeting 2022. Chicago, Illinois, USA. December 12-16, 2022. Oral presentation.
  13. **O. Ishola, * J. Vilcáez. A novel stochastic pore-scale simulation approach for permeability prediction in heterogeneous porous media from MICP and/or micro-CT data. Geological Society of America (GSA) Annual meeting 2022. Denver, Colorado, USA. October 9-12, 2022.
  14. **K. H. Omar, * J. Vilcáez. Removal of a mixture of toxic metals from petroleum produced water by dolomite. Association of Environmental & Engineering Geologists (AEG), 65th Annual meeting 2022. Las Vegas, Nevada, USA. September 12-17, 2022. Oral & poster presentations.
  15. *J. Vilcáez. Carbon Utilization in Depleted Oil Reservoirs for Enhancing Oil Recovery as Methane.  AAPG Carbon Capture, Utilization, and Storage Conference, March 29-31, 2022. Houston, Texas. Oral Presentation.
  16. **K. H. Omar, *J. Vilcáez. Removal of a mixture of toxic metals from petroleum poroduced water by dolomite. Geological Society of America (GSA), South–Central Section – 56th Annual meeting 2022. McAllen, Texas, USA. March 14–15, 2022. Oral presentation.
  17. **V. Ezennubia, *J. Vilcáez. Methanogenic degradation of dissolved oil hydrocarbons in petroleum produced water. Geological Society of America (GSA), South–Central Section – 56th Annual meeting 2022. McAllen, Texas, USA. March 14–15, 2022. Oral presentation.
  18. **K. H. Omar, *J. Vilcaez. Removal of mixture heavy metals and metalloids from petroleum produced water by dolomite filtration. 2021 American Association of Petroleum Geologists (AAPG) Mid-Continent Section Convention. Tulsa, Oklahoma, USA. October 3-5. 2021. Poster presentation.
  19. **O. Ishola, T. Benson, *J. Vilcáez. Insights from Machine Learning Application to Flow Prediction in Highly Heterogeneous Porous Media. International Meeting for Applied Geosciences & Energy 2021 (IMAGE’21). Colorado, Denver, USA. September 26-29, 2021. Oral presentation.
  20. **O. Ishola, T. Benson, *J. Vilcáez. Application of Machine Learning to Predict Hydraulic Tortuosity of Highly Heterogeneous Porous Media. American Chemical Society (ACS) Spring Meeting 2021. Online Everywhere, USA. April 5-30, 2021. Oral presentation.
  21. *J. Vilcáez. Treatment of produced water for dissolved oil and heavy metals: Methanogenic degradation coupled to dolomite filtration. American Geophysical Union (AGU) Fall Meeting 2020. Online Everywhere, USA. December 1-17, 2020. Oral presentation.
  22. **O. Ishola, *J. Vilcáez. A pore-scale numerical investigation on the impact of heterogeneity in predicting flow properties of carbonate rocks. American Geophysical Union (AGU) Fall Meeting 2020. Online Everywhere, USA. December 1-17, 2020. Poster presentation.
  23. **K.H. Omar, *J. Vilcáez. A new dolomite filtration method to remove heavy metals from produced water. American Geophysical Union (AGU) Fall Meeting 2020. Online Everywhere, USA. December 1-17, 2020. Poster presentation.
  24. **O. Ishola, *J. Vilcáez. A stochastic pore-scale numerical approach to permeability and tortuosity prediction in carbonate systems. Geological Society of America (GSA) Annual Meeting 2020. Connects Online, USA. October 26-30, 2020. Oral presentation.
  25. *J. Vilcáez. A new economic treatment method of produced water for dissolved oil and heavy metals. American Chemical Society (ACS) Midwest Regional Meeting (MWRM). Wichita, Kansas, USA. October 16-19, 2019. Oral presentation.
  26. *J. Vilcáez, **B. Shabani. Beneficial use of produced water in depleted oil reservoirs: in situ crude oil conversion to methane gas. Geological Society of America Annual Meeting 2019. Phoenix, Arizona, USA. September, 22-25, 2019. Oral presentation.
  27. **B. Shabani, *J.Vilcáez. A new TOUGHREACT module to simulate geological carbon storage under biotic conditions. Geological Society of America Annual Meeting 2018. Indianapolis, Indiana, USA. November 4-7, 2018. Poster Presentation.
  28. *J. Vilcáez. Field-scale simulation of barium transport in Class II wastewater disposal wells. Geological Society of America Annual Meeting 2018. Indianapolis, Indiana, USA. November 4-7, 2018. Oral presentation.
  29. A. Yadav, I. F. Farag, J. Vilcáez, N. H. Youssef, and M. S. *Elshahed. Enrichment and genomic analysis of a novel bacterial phylum from formation waters in a tertiary oil reservoir in Cushing, OK. Annual Symposium of the Department of Microbiology and Molecular Genetics, Oklahoma State University. Stillwater, Oklahoma. April 27, 2018. Poster presentation.
  30. *J. Vilcáez, **P. Ebrahimi, **B. Shabani. Coupling the disposal of CO2 and petroleum produced water: A new MEOR method. Geological Society of America, South-Central Section – 52nd Annual meeting 2018. Little Rock, Arkansas, USA. March 12-13, 2018. Oral presentation.
  31. *J. Vilcáez. Disposal of produced water into depleted oil reservoirs: economic use and risk of USDW pollution. National Ground Water Association (NGWA) Summit 2017. Nashville, Tennessee, USA. December 4-7, 2017. Oral presentation.
  32. **P. Ebrahimi, *J. Vilcáez. Transport of barium through dolomite rocks under the presence of guar gum and brine salinities of hydraulic fracturing wastewater. American Geophysical Union Fall Meeting 2017. New Orleans, Florida, USA. December 11-15, 2017. Poster presentation.
  33. **B. Shabani, *J. Vilcáez. An improved TOUGH2 module to simulate geological CO2 storage in saline aquifers. Geological Society of America Annual Meeting 2017. Seattle, Washington, USA. October 22-25, 2017. Poster presentation.
  34. **P. Ebrahimi, *J. Vilcáez. Experimental and modeling results of barium transport through dolomite under the presence of high salinity and guar gum of fracturing wastewater. 2017 American association of petroleum geologist (AAPG) Mid-continent section meeting. Oklahoma City, Oklahoma, USA. October 2-3, 2017. Poster presentation.
  35. *J. Vilcáez. Transport of heavy metals through shale rock fractures due to the injection of fracturing fluids: modeling and simulation.  Geological Society of America, South-Central Section – 51st Annual meeting 2017. San Antonio, USA. March 12-14, 2017. Oral presentation.
  36. *J. Vilcáez, **J. York, **T. Seabeck. Stimulation of microbial methanogenesis from oil and CO2 in the Cushing oil field. American Geophysical Union Fall Meeting 2016. San Francisco-USA, December 12-16, 2016. Poster presentation.
  37. **P. Ebrahimi, *J. Vilcáez. Effect of guar gum on the mobility of barium in disposal wells of the Arbuckle formation. Geological Society of America Annual Meeting 2016. Denver-USA. September 25-28, 2016. Oral presentation.
  38. **B. Shabani, *J. Vilcáez. Prediction of CO2-CH4-H2S-N2 gas mixtures solubility in brine using a non-iterative fugacity-activity model relevant to MEOR. Geological Society of America Annual Meeting 2016. Denver-USA. September 25-28, 2016. Oral presentation.
  39. *J. Vilcáez. Reactive transport modeling of biocide reagents in unconventional hydrocarbon reservoirs. 251st American Chemical Society National Meeting & Exposition. San Diego-USA. March 14-17, 2016. Oral presentation.
  40. *J. Vilcáez. Microbial methanogenesis in oil reservoirs subjected to the injection of CO2. Geological Society of America Annual Meeting 2015. Baltimore-USA. November 1-4, 2015. Oral presentation.
  41. *J. Vilcáez. Pore-scale simulation of transport properties of carbonate rocks using nanoscale FIB-SEM 3D images. Geological Society of America Annual Meeting 2015. Baltimore-USA. November1-4, 2015. Oral presentation.
  42. *J. Vilcáez. Stimulating effect of protein-rich matter on the biogenic conversion of CO2 to CH4. 249th American Chemical Society National Meeting & Exposition. Denver-USA. March 22-26, 2015. Oral presentation.
  43. *J. Vilcáez. Mathematical modeling as a tool to assess microbial community responses to CO2 injection. American Geophysical Union Fall Meeting 2014. San Francisco-USA, December 15-17, 2014. Poster presentation.
  44. *J. Vilcáez, L. Li, K. Sato. Horizontal wells placement optimization for CO2 geological storage in confined aquifers subjected to brine recycling. Japan Geosciences Union Meeting 2014, Yokohama-Japan. April 28-May 2, 2014. Oral presentation.
  45. *J. Vilcáez. Restoration of methane gas deposits through stimulation of indigenous methanogens: modeling and simulation. JOGMEC-TRC Week 2012, toward actualization of a pilot project focused on the technology of microbial methane generation. Tokyo-Japan. November 28, 2012. Oral presentation.
  46. *J. Vilcáez, L. Li, S. Hubbard, T. Hazen. Biodegradation of Deep-Sea Oil Spill at the Gulf of Mexico: An Estimate of Half Life Time. American Geophysical Union Fall Meeting 2010. San Francisco-USA. December 13-17, 2010. Poster presentation.

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