Earth Sciences Division (ESD) Department of Energy (DOE) Lawrence Berkeley National Laboratory (LBNL)

Tim Kneafsey's Publications

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    Journal Papers and Book Chapters

    1. Kneafsey, T.J., Y. Seol, A. Gupta, L. Tomutsa, “Permeability of Laboratory-Formed Methane-Hydrate-Bearing Sand”, submitted to SPE Journal (June 2008, revision requested June 2009)
    2. Kneafsey, T.J. and K. Pruess, Laboratory Flow Experiments for Visualizing Carbon Dioxide-Induced, Density-Driven Brine Convection, Transport in Porous Media DOI 10.1007/s11242-009-9482-2, October, 2009, LBNL-2731E
    3. Kneafsey, T.J., H. Liu, W. Winters, R. Boswell, R. Hunter, and T.S. Collett, “Analysis of core samples from the BPXA-DOE-USGS Mount Elbert gas hydrate stratigraphic test well: Insights into core disturbance and handling”, Marine and Petroleum Geology, doi:10.1016/j.marpetgeo.2009.10.009 October, 2009, LBNL-2730E
    4. Gupta, A,. G.J. Moridis, T.J. Kneafsey, and E.D. Sloan, “Modeling Pure Methane Hydrate Dissociation Using a Numerical Simulator from a Novel Combination of X-ray Computed Tomography and Macroscopic Data”, submitted to Energy and Fuels (June 2009)
    5. W. Waite, C. Santamarina, D. Cortes, B. Dugan, N. Espinoza, J. Germaine, J. Jang, J. Jung, T.J. Kneafsey, H. Shin, K. Soga, W. Winters, T-S. Yun, “Physical Properties of Hydrate-Bearing Sediments” Rev. Geophys., 47, RG4003, doi:10.1029/2008RG000279, December 2009
    6. Seol, Y. and T.J. Kneafsey, “X-ray computed-tomography observations of water flow through anisotropic methane hydrate-bearing sand, Journal of Petroleum Science and Engineering 66 (2009) 121–132, doi:10.1016/j.petrol.2009.01.008
    7. Waite, W. F., T. J. Kneafsey, W. J. Winters, and D. H. Mason (2008), Physical property changes in hydrate-bearing sediment due to depressurization and subsequent repressurization, J. Geophys. Res., 113, B07102, doi:10.1029/2007JB005351, LBNL-664E
    8. Gupta, A., G.J. Moridis, T.J. Kneafsey, and E. D. Sloan, Jr., “Modeling Pure Methane Hydrate Dissociation Using a Numerical Simulator from a Novel Combination of X-ray Computed Tomography and Macroscopic Data”, in preparation for submittal to Chemical Engineering Science
    9. Ghezzehei, T.A., T.J. Kneafsey, and G.W. Su, “Correspondence of the Gardner and van Genuchten relative permeability function parameters," Water Resources Research, v. 43, W10417, doi:10.1029/2006WR005339, 2007
    10. Kneafsey, T.J., Y. Seol, G.J. Moridis, L. Tomutsa, B.M. Freifeld, “Laboratory measurements on core-scale sediment/hydrate samples to predict reservoir behavior”, Submitted to AAPG Bulletin, November, 2005, LBNL-59085
    11. Gupta, A., T.J. Kneafsey, G.J. Moridis, Y. Seol, M.B. Kowalsky, E.D. Sloan Jr., “Methane hydrate thermal conductivity in a large heterogeneous porous sample”, J. Phys. Chem. B; 2006; ASAP Web Release Date: 02-Aug-2006; DOI: 10.1021/jp0619639LBNL-59088
    12. Kneafsey, T.J., L. Tomutsa, G.J. Moridis, Y. Seol, B.M. Freifeld, C.E. Taylor, and A. Gupta, “Methane Hydrate Formation and Dissociation in a Core-Scale Partially Saturated Sand Sample”, Journal of Petroleum Science and Engineering, 56 (2007) 108–126. LBNL-59087
    13. Seol, Y., T.J. Kneafsey, and K. Ito, An Evaluation of the Active Fracture Concept with Modeling Unsaturated Flow and Transport in a Fractured Meter-Sized Block of Rock, Vadose Zone Journal, December 2005, doi:10.2136/vzj2004.0175, LBNL-52818
    14. Freifeld, B.M. and T.J. Kneafsey. "Investigating methane hydrate in sediments using X-ray computed tomography". In Advances in the Study of Gas Hydrates. Kluwer Academic/Plenum Press, 2004. p. 227-238, LBNL-55030
    15. Kneafsey, T.J., Moridis, G., Freifeld, B., Tomutsa, L., Seol, Y. and Taylor, C.E., 2005. Understanding Methane Hydrate Behavior Using X-ray Computed Tomography, Fire in the Ice, The National Energy Technology Laboratory Methane Hydrate Newsletter, pp. 1-4 LBNL/PUB-926
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    1. W.F. Waite, T.J. Kneafsey, J.C. Santamarina, W.J. Winters, T-S Yun, D.H. Mason, C. Ruppel, “Physical Property Changes in Hydrate-Bearing Sediment Samples due to Depressurization/ Repressurization,” American Geophysical Union, San Francisco CA, Dec. 11-15, 2006
    2. T.J. Kneafsey, G.J. Moridis, and M.B. Kowalsky, “Engineering Models: The TOUGH-Fx/Hydrate Simulator,” Integration of Modeling and USGS Hydrate Laboratory Research, Denver CO, August 2-3 2005
    3. Kneafsey, T.J., L. Tomutsa, C.E. Taylor, A. Gupta, G.J. Moridis, B.M.Freifeld, Y. Seol, “Methane Hydrate Formation and Dissociation in a Partially Saturated Sand,” CSM Hydrate Consortium Meeting, Golden CO, March 24-25, 2005


    1. Seol, Y., and T.J. Kneafsey, Fluid flow through heterogeneous methane hydrate bearing sand: observations using x-ray CT scanning, Proceedings of the 6th International Conference on Gas Hydrates (ICGH 2008),Vancouver, British Columbia, CANADA, July 6-10, 2008
    2. Seol, Y, T.J. Kneafsey, and G.J. Moridis (2007), Numerical simulation of hydrate formation morphology in cylindrical experimental sand columns, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract OS23A-1037
    3. Kneafsey, T.J., K. Pruess, and N. Spycher, Preliminary experimental investigation of water injection to reduce non-condensible and corrosive gases in steam produced from vapor-dominated reservoirs, PROCEEDINGS, Thirty-Third Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, California, January 28-30, 2008. SGP-TR-185
    4. Nakagawa, S., T.J. Kneafsey, and G.J. Moridis, Mechanical strength and seismic property measurements of hydrate-bearing sediments (HBS) during hydrate formation and loading tests, 2008 Offshore Technology Conference held in Houston, Texas, U.S.A., 5–8 May 2008, OTC 19559
    5. Kneafsey, T.J., Y. Seol, A. Gupta, and L. Tomutsa, Permeability of Laboratory-Formed Methane-Hydrate-Bearing Sand, 2008 Offshore Technology Conference held in Houston, Texas, U.S.A., 5–8 May 2008, OTC 19536-PP
    6. Kneafsey, T.J., and L. Tomutsa, X-Ray CT Scan of cores from NGHP Expedition 01, 2006, Presented at NGHP GAS HYDRATE CONFERENCE 2008 (Under the Aegis of Indian National Gas Hydrate Program) NEW DELHI, INDIA JANUARY 29TH TO 31ST 2008 Organized by Directorate General of Hydrocarbons, Ministry of Petroleum & Natural Gas, Government of India
    7. Kneafsey, T.J., and L. Tomutsa, CT Scanning, Analysis, and Production Test - Mt Elbert Core Samples, presented at BP-DOE Mount Elbert-01 Gas Hydrate Stratigraphic Test Data Analyses/Interpretation & Production Test Design Workshop, March 2008
    8. Kneafsey, T.J., Y. Seol, A. Gupta, L. Tomutsa, G.J. Moridis; (2007), Relative Permeability of Gas Hydrate Bearing Sediments, Eos Trans. AGU, 88(23), Jt. Assem. Suppl., Abstract NS51B-02
    9. Seol, Y., T.J. Kneafsey, L. Tomutsa, and G.J. Moridis. "Preliminary relative permeability estimates of methane hydrate-bearing sand". In TOUGH Symposium 2006; Berkeley, CA; 15-17 May 2006. 2006. LBNL-60368
    10. Benson, S.M., L. Tomutsa, D. Silin, T. Kneafsey, L. Miljkovic, “Core scale and pore scale studies of carbon dioxide migration in saline formations”, 8th International Conference on Greenhouse Gas Control Technologies, Trondheim, Norway, 19-22 June 2006, LBNL-59082
    11. Kneafsey, T.J., L. Tomutsa, Y. Seol, G.J. Moridis. “Relative Permeability Measurements of Hydrate-Bearing Sediments”, Science and Technology Issues in Methane Hydrate R&D, Engineering Conferences International, Kauai, March 5-9, 2006
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    Lab Reports

    1. Seol, Y., T.J.Kneafsey, and L. Tomutsa, “Relative Permeability Estimations for Methane Hydrate-Bearing Sand”, October, 2005, LBNL-59051
    2. Freifeld, B, T. Kneafsey, J. Pruess, P. Reiter, and L. Tomutsa, “X-ray Scanner for ODP Leg 204: Drilling Gas Hydrates on Hydrate Ridge, Cascadia Continental Margin”, LBNL-51327, 2002
    3. Kneafsey, T.J., M.J. O’Sullivan, K. Pruess, and G.S. Bodvarsson, “Experience in Geothermal Reservoir Simulation to Gain Confidence in Thermohydrologic Predictions for nuclear Waste Disposal,” LBNL 48124, 2002
    4. Kneafsey, T.J., C.M. Oldenburg, and R. Salve, “The effect of clay swelling on fracture flow in the Paintbrush nonwelded unit of the Topopah Spring Tuff”, LBNL-48125, 2001
    5. Hu, Q., T. Kneafsey, and J. Wang, “Summary report on Phase 1 feasibility study of in-drift diffusion”, LBNL-49063, 2001
    6. Wildenschild, D., M.S. Costantino, J.J. Roberts, T.J. Kneafsey, and W. Lin, “Fracture/Matrix Flow Experiments Results”, Lawrence Livermore National Laboratory, UCRL-ID-131775, September 30, 1998, 38 pages
    7. Kneafsey, T.J. and K. Pruess, “Preferential Flow Paths and Heat Pipes:  Continued Laboratory Experiments on Heat-Driven Flow in Natural and Artificial Rock Fractures and Scaling Relationships,” E.O. Lawrence Berkeley Laboratory Report 42262, August 1998, 70 pages
    8. Kneafsey, T. and K. Pruess. “Experimental studies of vaporizing flows in unsaturated fractures”, 1997 Fall Meeting of the American Geophysical Union, 1997. LBNL-40731 Abs.
    9. Kneafsey, T.J. and K. Pruess, “Preferential Flow Paths and Heat Pipes:  Results from Laboratory Experiments on Heat-Driven Flow in Natural and Artificial Rock Fractures,” E.O. Lawrence Berkeley Laboratory Report 40467, June 1997, 47 pages


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