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Zhenxue Dai

Email
Phone (505) 665-6387

Capabilities

  • Computational Physics and Applied Mathematics
  • Numerical modeling
  • Statistics
  • Uncertainty quantification
  • Uncertainty analysis
  • Earth and Space Sciences
  • Geoscience
  • Subsurface flow and transport
  • Hydrology
  • Computer and Computational Sciences
  • Data mining
  • High performance computing
  • Earth and Space Sciences
  • Field studies and process experiments
  • Carbon fluxes
  • Information Science and Technology
  • Implicit Monte Carlo (IMC)
  • Heterogeneous Architectures
  • Uncertainty quantification (UQ)
  • Latin hypercube sampling (LHS)

Expertise

Research and Teaching Interests

  1. Uncertainty quantification and optimization for CO2-Enhanced Oil Recovery (EOR);
  2. Coupled simulation of heat transfer, fluid flow (oil-gas-CO2-water) and geochemical reactions (multi-phase and multi-component transport modeling) in heterogeneous media;
  3. Characterizations of multi-scale reservoir systems with geological, geochemical and geophysical data by using geostatistical methods;
  4. Risk assessment for CO2 geologic sequestration in reservoirs;
  5. Upscaling flow and reactive transport parameters in porous and fractured rocks (in aquifers and oil and shale-gas reservoirs);
  6. Identification of geochemical reaction processes and reservoir heterogeneous structures;
  7. Optimal design of injection/pumping wells in the oil reservoirs;
  8. Stochastic modeling of flow and reactive solute transport in hierarchical heterogeneous formations, including fractured rock and porous media; and
  9. Inverse modeling of reactive transport in variably saturated heterogeneous media.

Education

University of La Coruña, Spain, Civil Engineering, Ph.D. Cum Laude, 2000

Central Coal Mining Research Institute, China, Hydrogeology, M.S., 1989

Changchun University of Geology, China, Hydrogeology, B.A., 1984

 

LANL Positions

2010-present: Los Alamos National Laboratory, EES-16, Staff Scientist III

2008-2010: Los Alamos National Laboratory, EES-16, Staff Scientist II

2005-2008: Los Alamos National Laboratory, EES-6, Limited-term Scientist

 

Professional Societies

A Fellow of the Geological Society of America, GSA Fellow, since 2010.

A professional member of American Geophysical Union

 

Awards

  1. Superior performance and teamwork awards, Los Alamos National Lab, 2012.

  2. A Fellow of the Geological Society of America, Awarded in 2010.

  3. Organizer of Brown Bag Seminar Series, Los Alamos Awards Program, 2009.  

  4. Outstanding Innovation and Technology Transfer Awards, Los Alamos National Lab, 2008.

  5. Cum Laude distinction PhD, University of La Coruña, Spain, 2000.

 

Patents

  1. Patent for “An integrated framework for optimizing CO2 sequestration and enhanced oil recovery”,  Los Alamos National Laboratory, IDEA 14-00042, in review, 2014.
 

Publications

1. Dai, Z., P. H. Stauffer, J. W. Carey, R. S. Middleton, Z. Lu, J. F. Jacobs, L. Spangle, K. Hnottavange-Telleen, Pre-site characterization risk analysis for commercial-scale carbon sequestration, Environmental Science & Technology, 48, 3908−3915, 2014.

2. Dai, Z., E. Keating, D. Bacon, H. Viswanathan, P. Stauffer, A. Jordan, R. Pawar, Probabilistic evaluation of shallow groundwater resources at a hypothetical carbon sequestration site, Scientific Reports, 4: 4006, DOI: 10.1038/srep04006, 2014.

3. Dai, Z., R. Middleton, H. Viswanathan, J. Fessenden-Rahn, J. Bauman, R. Pawar, S. Lee and B. McPherson, An integrated framework for optimizing CO2 sequestration and enhanced oil recovery, Environmental Science & Technology Letters, DOI: 10.1021/ez4001033, 1, 49-54, 2014.

4. Yang, C., Z. Dai, K. Romanak, S. Hovorka, R. Trevino, Inverse Modeling of Water-Rock-CO2 Batch Experiments: Implications for Potential Impacts on Groundwater Resources at Carbon Sequestration Sites, Environmental Science & Technology, 48 (5), 2798–2806, 2014.

5. Soltanian, M.R., R. Ritzi, Z. Dai, C. Huang, D. Dominic, Transport of kinetically sorbing solutes in heterogeneous sediments with multimodal conductivity and hierarchical organization across scales, Stochastic Environmental Research and Risk Assessment,1-18, July, 2014.

6. Carroll, S., E. Keating, K. Mansoor, Z. Dai, Y. Sun, W. Trainor-Guitton, C. Brown, D. Bacon,  Key Factors for Determining Groundwater Impacts Due to Leakage from Geologic Carbon Sequestration Reservoirs, Int. J. of Greenhouse Gas Control, v29, 153–168, 2014.

7. Dai, Z., H. Viswanathan, J. Fessenden-Rahn, R. Middleton, F. Pan, W. Jia, S. Lee, B. McPherson,W. Ampomah, R. Grigg, Uncertainty quantification for CO2 sequestration and enhanced oil recovery, Energy Procedia, in press, 2014.

8. Keating, E., Z. Dai, D. Dempsey, R. Pawar, Effective detection of CO2 leakage: a comparison of groundwater sampling and pressure monitoring, Energy Procedia, in press, 2014.

9. Bacon, D., N. Qafoku, Z. Dai, E. Keating, C. Brown, Modeling the Impact of Carbon Dioxide Leakage into an Unconfined, Oxidizing Carbonate Aquifer, submitted to Int. J. of Greenhouse Gas Control, in review, 2014.

10. Soltanian, R., R. Ritzi, Z. Dai, C. Huang, Reactive solute transport in physically and chemically heterogeneous porous media with multimodal reactive mineral facies: The Lagrangian approach, submitted to Chemosphere,in review, 2014.

11. Soltanian, R., R. Ritzi, C. Huang, Z. Dai, Relating reactive solute transport to hierarchical and multiscale sedimentary architecture in a Lagrangian-based transport model: 1. Time-dependent effective retardation factor, submitted to Water Resour. Res., in review, 2014.

12. Soltanian, R., R. Ritzi, C. Huang, Z. Dai, Relating reactive solute transport to hierarchical and multi-1 scale sedimentary architecture in a Lagrangian-based transport model: 2. Particle displacement variance, submitted to Water Resour. Res., in review, 2014.

13. Zhu, L., H. Gong, Z. Dai, T. Xu, X. Su, X. Li, An integrated assessment of the impact of precipitation and groundwater on vegetation growth in arid and semiarid areas, submitted to Water Resources Management, in review, 2014.

14. Soltanian, R., R. Ritzi, C. Huang, Z. Dai , H. Deng, Discussion on” Upscaling retardation factor in hierarchical porous media with multimodal reactive mineral facies” by Deng et al., submitted to Transport in Porous Media, in review, 2014.

15. Deng, H., Dai, Z., A. Wolfsberg, Z. Lu and M. Ye, Upscaling sorption coefficient in hierarchical porous media with multimodal reactive mineral facies, Chemosphere, V. 91(3), p. 248–257, 2013.

16. Viswanathan H., Z. Dai, C. Lopano, E. Keating, J. A. Hakala, G. D. Guthrieb, R. Pawar, The Impact of CO2 Sequestration on Shallow Groundwater, SIAM News, News Journal of the Society for Industrial and Applied Mathematics, v.45(8), p.12, October, 2012.

17. Viswanathan H., Z. Dai, C. Lopano, E. Keating, J. A. Hakala, K. G. Scheckel, L. Zheng, G. D. Guthrieb, R. Pawar, Developing a robust geochemical and reactive transport model to evaluate possible sources of arsenic at the CO2 sequestration natural analog site in Chimayo, New Mexico, Int. J. of Greenhouse Gas Control, 10, 199–214, 2012.

18. Deng, H., P. Stauffer, Z. Dai, Z. Jiao, R. Surdam, Simulation of industrial-scale CO2 storage: Multi-scale heterogeneity and its impacts on storage capacity, injectivity and leakage, Int. J. of Greenhouse Gas Control, 10, 397–418, 2012.

19. Dai, Z., A. Wolfsberg, P. Reimus, H. Deng, E. Kwicklis, M. Ding, D. Ware and M. Ye, Identification of sorption processes and parameters for radionuclide transport in fractured rock, J. of Hydrol., v 414–415, p516-526, 2012.

20. Wang, W., Z. Dai, J. Li and L. Zhou, A hybrid Laplace transform finite analytic method for solving transport problems with large peclet and courant numbers, Computers & Geosciences, doi.org/10.1016/j.cageo.2012.05.020, v 49, p182-189, 2012.

21. Samper, J, C Yang, L. Zheng, L. Montenegro, T. Xu, Z. Dai, G Zhang, C Lu & S Moreira, CORE2D V4: A code for water flow, heat and solute transport, geochemical reactions, and microbial processes, Groundwater Reactive Transport Models, F Zhang, G-T Yeh, C Parker & X Shi (Ed), Bentham Science Publishers, pp 161-186, ISBN 978-1-60805-029-1, 2011

22. Dai, Z., E. Keating, C.W. Gable, D. Levitt, J. Heikoop, A. Simmons, Stepwise inversion of a groundwater flow model with multi-scale observation data, Hydrogeology Journal, DOI 10.1007/s10040-009-0543-y, 18: 607-624, 2010.

23. Deng, H., Z. Dai, A. Wolfsberg, Z. Lu, M. Ye and P. Reimus, Upscaling of reactive mass transport in fractured rocks with multimodal reactive mineral facies, Water Resources Research, 46, W06501, doi:10.1029/2009WR008363, 2010.

24. Lu, Z., A. Wolfsberg, Z. Dai, and C. Zheng, Characteristics and controlling factors of dispersion in bounded, randomly heterogeneous porous media, Water Resources Research, 46,  W12508,  doi:10.1029/2009WR008392 , 2010.

25. Dong S., Z. Dai and J. Li, The scale dependence of dispersivity in multi-faces heterogeneous sediments, J. of EARTH SCIENCE FRONTIERS, in Chinese, May, 2010.

26. Dai, Z., A. Wolfsberg, Z. Lu, and H. Deng, Scale dependence of sorption coefficients for contaminant transport in saturated fractured rock, Geophysical Research Letters, 36, L01403, doi:10.1029/2008GL036516, 2009.

27. Lu, Z., H. Deng, Z. Dai, A. Wolfsberg and P. Reimus, Quantifying uncertainty of effective transport parameters, submitted to Geophysical Research Letters, in revision, 2011.

28. Wolfsberg, A., Dai, Z., J. Vrugt and P. Reimus, Inverse Modeling of Colloid-facilitated Plutonium Transport in Fractured Tuffaceous Rock, for J. of Contaminant Hydrology, in internal review, 2011.

29. Dai, Z., J. Samper, A. Wolfsberg, and D. Levitt, Identification of relative conductivity models for water flow and solute transport in unsaturated compacted bentonite, Physics and Chem. of the Earth, doi:10.1016/j.pce.2008.10.012, v.33, S177-S185, 2008.

30. Harp D., Z. Dai, A. Wolfsberg, J. Vrugt, B. Robinson, V. Vesselinov, Aquifer structure identification using stochastic inversion, Geophysical Research Letters, 35, L08404, doi:10.1029/2008GL033585, 2008.

31. Huang, C., Z. Dai, Modeling Groundwater in Multimodal Porous Media with Localized Decompositions, Mathematical Geosciences, doi:10.1007/s11004-008-9167-3, 40:689-704, 2008.

32. Dai, Z., A. Wolfsberg, Z. Lu, and P. Reimus, Upscaling matrix diffusion coefficients for heterogeneous fractured rocks, Geophysical Research Letters, 34, L07408, doi:10.1029/2007GL029332, 2007.

33. Dai, Z., A. Wolfsberg, Z. Lu, and R. Ritzi, Representing Aquifer Architecture in Macrodispersivity Models with an Analytical Solution of the Transition Probability Matrix, Geophysical Research Letters, 34, L20406, doi:10.1029/2007GL031608, 2007.

34. Dai, Z. and J. Samper, Inverse modeling of water flow and multicomponent reactive transport in coastal aquifer systems, J. of Hydrology, 327, 447-461, 2006.

35. Samper, J., Z. Dai, J. Molinero, M. Garcia-Gutierrez, T. Missana, M. Mingarro, Interpretation of solute transport experiments in compacted Ca-bentonites using inverse modeling, Physics and Chem. of the Earth, v31, p.640-648, 2006.

36. Ritzi R., Z. Dai, D. Dominic, Y. Rubin, Reply to comment by Shlomo P. Neuman on “Spatial correlation of permeability in cross-stratified sediment with hierarchical architecture”, Water Resour. Res., 42, W05602, doi:10.1029/2005WR004402, 2006.   

37. Dai, Z., J. Samper, and R. Ritzi, Identifying geochemical processes by inverse modeling of multicomponent reactive transport in Aquia aquifer, Geosphere, v. 2, no. 4, p.210-219, doi: 10.1130/GES00021.1, June, 2006.

38. Ritzi, R. and Z. Dai, Introduction: Modeling ground-water flow and reactive transport in physically and chemically heterogeneous media, Geosphere, Vol. 2, No. 2 pp. 73, June, 2006.

39. Dai, Z., R. Ritzi, and D. Dominic, Improving permeability semivariograms with transition probability models of hierarchical sedimentary architecture derived from outcrop-analog studies, Water Resour. Res., 41, W07032, doi:10.1029/2004WR003515, 2005.

40. Samper, J. , Zheng, L., Montenegro, L.,  Fernández, A., Rivas, P., Dai, Z., Forward and inverse modeling of multicomponent reactive transport in single and double porosity media, Advances in Understanding Engineered Clay Barriers, p493-503, 2005.

41. Dai, Z. and J. Samper, Inverse problem of multicomponent reactive chemical transport in porous media: Formulation and applications, Water Resour. Res. 40,  W074071-W0740718, doi:10.1029/2004WR003248, 2004.

42. Dai, Z., R. Ritzi, C. Huang, D. Dominic, and Y. Rubin, Transport in heterogeneous sediments with multimodal conductivity and hierarchical organization across scales, J. of Hydrology, v.294, 1-3, p. 68-86, 2004.

43. Ritzi, R., Z. Dai, D. Dominic, and Y. Rubin, Spatial correlation of permeability in cross-stratified sediment with hierarchical architecture, Water Resour. Res., 40, doi:10.1029/2003WR002420, 2004.

44. Dai, Z., R. Ritzi, and D. Dominic, Estimating Parameters for Hierarchical Permeability Correlation Models, Aquifer Characterization, SEPM Publishers, No. 80, p. 41–54, 2004.

45. Proce, C., R. Ritzi, D. Dominic and Z. Dai, Modeling multi-scale heterogeneity and aquifer interconnectivity, Ground Water, Vol.42, No.5, p.658-670, 2004.

46. Samper, J. , Fernández, A., Zheng, L., Montenegro, L., Rivas, P., Dai, Z., Forward and inverse modeling of multicomponent reactive transport in single and double porosity media, Developments in Water Science,v55, p805-816, 2004.

47. Dai, Z., R. Ritzi, D. Dominic and Y. Rubin, Estimating Spatial Correlation Structure for Permeability in Sediments with Hierarchical Organization, Groundwater Quality Modeling and Management Under Uncertainty, Ed. by S. Mishra, American Society of Civil Engineers, p.83-100, 2003.

48. Ritzi, R., Z. Dai, D. Dominic, and Y. Rubin, Review of permeability in buried-valley aquifers: centimeter to kilometer scales, International Association of Hydrologic Sciences Redbook, Kovar, K. and Z. Hrkal eds. IAHS Publishers, No. 277, p.409-418, 2002.

49. Garcia-Gutiérrez, M.,  T. Missana, M. Mingarro, J. Samper, Z. Dai and J. Molinero, Solute Transport Properties of Compacted Ca-bentonite Used in FEBEX Project, J. Contaminant Hydrology, p.127-137, 47, 2001.

50. Dai, Z. and J. Samper, Estimación Automática de Parámetros de Flujo No Saturado Mediante Ensayos de Infiltracón, IV Jornadas sobre Investigación en la Zona no Saturada del Suelo, Tenerife, ISBN 84-699-1258-5, p.175-180, 1999. (Spanish).