Richard Krahenbuhl

Research Assistant Professor, Geophysics
Associate Director, Humanitarian, Engineering, & Science Graduate Program

Education

  • PhD, Geophysics, Colorado School of Mines
  • BS, Geophysics, University of California, Santa Barbara

Research Areas

  • Time-Lapse Monitoring
  • Geothermal Exploration
  • CO2 Sequestration
  • Geoscientists Without Borders
  • Archaeological Geophysics
  • Humanitarian Geoscience
  • Volcanic Studies
  • Landslide Hazards
  • Exploration in Oil, Gas, Mining

Publications

  • Flamme, H., D. Sirota, R. Krahenbuhl, Y. Li, B. Dugan, J Shragge, E.G. Zenteno, J.R.T.
    Paucara, A.M. Lizarraga, 2020, Geophysical Investigation to Understand Local Geology and
    Agricultural Water Movement in Relation to Landslide Activity in Majes, Peru. 90th
    Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts
  • Ziehm, T., J. McCaskill, R. Krahenbuhl, and M. Slaughter, 2020, Geophysical investigation
    for unmarked graves at the Russell gulch cemetery in Colorado. Symposium on the
    Application of Geophysics for Environmental and Engineering Problems
  • Bonn, P., D. Mayes, E. Moren, A. Kadyanto, R. Krahenbuhl, and M. Slaughter, 2020,
    Geophysical archaeological investigation of a mass grave site at Roselawn Cemetery in
    Pueblo, Colorado. Symposium on the Application of Geophysics for Environmental and
    Engineering Problems
  • Flamme, H., D. Sirota, G. Crookston, R. Krahenbuhl, B. Passerella, 2020, Initial data
    collection and characterization of the new geophysical discovery lab at Colorado School of
    Mines. Symposium on the Application of Geophysics for Environmental and Engineering
    Problems
  • Flamme, H., R. Krahenbuhl, Y. Li, E.G. Zenteno, J.R.T. Paucara, A.M. Lizarraga, 2020,
    Understanding local geology and subsurface movement of irrigation waters in relation to
    anthropogenically induced landslides at the Majes agricultural site Peru. Symposium on the
    Application of Geophysics for Environmental and Engineering Problems
  • Sirota, D., J. Shragge, R. Krahenbuhl, and A. Swidinsky, 2020, Validating low-cost dc
    resistivity instrument design for low-cost humanitarian geophysics. Symposium on the
    Application of Geophysics for Environmental and Engineering Problems
  • Krahenbuhl, R.A., A. Reitz, Y. Li, H. Rim, and S. Wagner, 2019: Time-lapse borehole vector
    gravity for reservoir monitoring. 89th Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded
    Abstracts
  • Krahenbuhl, R.A., Y. Li, W. A. McAliley, N. Moodie, T. Irons, and B.R. Bloss, 2019:
    Integrated Model Construction for CO2-EOR Monitoring via Charged-Wellbore Casing
    Controlled-Source Electromagnetics. 89th Ann.Internat. Mtg, Soc. Expl. Geophys.,
    Expanded Abstracts
  • McAliley, W. A., B.R. Bloss, T. Irons, N. Moodie, Krahenbuhl, R.A., and Y. Li, 2019:
    Analysis of land-based CSEM data for CO2 monitoring at Bell Creek, MT. 89th
    Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts
  • Sirota, D., R.A. Krahenbuhl, J. Shragge, and A. Swidinski, 2019, Low-cost DC resistivity
    instrument design for humanitarian geophysics. Symposium on the Application of
    Geophysics for Environmental and Engineering Problems
  • Krahenbuhl, R.A., B. Passerella, H. Flamme, G. Crookston, D. Sirota, 2018: Developing a
    large underground geophysical education laboratory at Colorado School of Mines. 88th
    Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts
  • Li, Y., R.A. Krahenbuhl, J. Capriotti, 2018: Time-lapse gravity: A versatile method for
    monitoring dynamic processes. International Symposium on Deep Earth Exploration and
    Practices (DEEP). Session level invited keynote presentation
  • McAliley. W.A., R. Krahenbuhl, T. Irons, B. Bloss, N. Moodie, Y. Li, 2018: Time-lapse
    charged wellbore casing controlled source electromagnetic surveys for monitoring injected
    carbon dioxide. Annual Meeting, American Geophysical Union
  • Irons, T., N. Moodie, A. McAliley, R. Krahenbuhl, B. Bloss, K. Zamudio, and M. Pace,
    2018: Validation and development of multiphase reservoir simulations with controlled source
    electromagnetics. Annual Meeting, American Geophysical Union
  • Moodie, N., Trevor Irons, Andy McAliley, Richard Krahenbuhl, Yaoguo Li, Benjamin Bloss,
    2018: Devising a framework to couple electromagnetic geophysical measurements with
    reservoir simulations to monitor CO2 plume movement. Annual Meeting, American
    Geophysical Union
  • Krahenbuhl, R.A., B. Passerella, H. Flamme, G. Crookston, 2018: Building a large, outdoor,
    underground geophysical education laboratory at Colorado School of Mines. Symposium on
    the Application of Geophysics for Environmental and Engineering Problems; Geophysics
    Education Section.
  • Krahenbuhl, R., and Y. Li, 2017, Investigation of magnetic inversion methods in highly
    magnetic environments under strong self-demagnetization effect. Geophysics, 82, 6, 1-15
  • Yin, Q., R. Krahenbuhl, Y. Li, S. Wagner, and J. Brady, 2017, Integrating time-lapse gravity
    and reservoir simulation data at Prudhoe Bay for new understanding. Symposium on the
    Application of Geophysics for Environmental and Engineering Problems
  • Li, Y., J. Capriotti, and R. Krahenbuhl, 2016, Inversion of time-lapse gravity data for
    reservoir monitoring. 78th EAGE Conference and Exhibition. Workshop: Potential fields
    and their gradient tensors in the integrated inversion of geophysical data – new advances
  • Krahenbuhl, R.A., A. Reitz, Y. Li, S. Wagner, and J. Konkler, 2016, Prudhoe Bay reservoir
    model: making the link between seismic and borehole data to gravity, electrical and EM
    methods. 86th Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts
  • Balza, A., Y. Li, and R.A. Krahenbuhl, 2016, Joint analysis of time-lapse gravity and
    production data for a gas reservoir. 86th Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded
    Abstracts
  • Yin, Q., R.A. Krahenbuhl, Y. Li, S. Wagner, and J. Brady, 2016, Time-lapse gravity data at
    Prudhoe Bay: New understanding through integration with reservoir simulation models. 86th
    Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts
  • Krahenbuhl, R., C. Martinez, Y. Li, and G. Flanagan, 2015: Time-lapse monitoring of CO2
    sequestration: an integrated site investigation based on reservoir properties and seismic with
    borehole and surface gravity data. Geophysics, 80, WA15-WA24. (Special Section,
    Advances in Time-Lapse)
  • Reitz, A., R. Krahenbuhl, and Y. Li, 2015: Feasibility of time-lapse gravity and gravity
    gradiometry monitoring for SAGD reservoirs. Geophysics, Geophysics, 80, WA99-WA111.
    (Special Section, Advances in Time-Lapse)
  • Krahenbuhl, R.A., and Y. Li, 2015: Interpretation of magnetic data in highly magnetic
    environments with application to the Hawsons Iron Deposit in NSW, Australia. Near
    Surface Geophysics Asia Pacific Conference (NSGAPC).
  • Krahenbuhl, R.A., and Y. Li, 2015: Robust parametric inversion using adaptive quenched
    simulated annealing. 85th Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts
  • Capriotti, J., Y. Li, and R.A. Krahenbuhl, 2015: Joint inversion of gravity and gravity
    gradient data using a binary formulation. International Workshop on Gravity, Electrical and
    Magnetic Methods (GEM), Chenghu. Expanded Abstracts
  • Foks, N., R. Krahenbuhl, and Y. Li, 2014: Adaptive sampling of potential-field data: A direct
    approach to compressive inversion. Geophysics, 79, IM1-IM9.
  • Krahenbuhl, R., A. Reitz, H. Rim, and Y. Li, 2014: Improved recovery of fluid movement
    through time-lapse borehole vector gravity. 84th Ann.Internat. Mtg, Soc. Expl. Geophys.,
    Expanded Abstracts
  • Reitz, A., R.A. Krahenbuhl, Y. Li, and J. Brady, 2014: Feasibility of surface and borehole
    time-lapse gravity for SAGD monitoring. 84th Ann.Internat. Mtg, Soc. Expl. Geophys.,
    Expanded Abstracts
  • Dodds, K., R. Krahenbuhl, A. Reitz, Y. Li, and S. Hovorka, 2013: Evaluating time-lapse
    borehole gravity for CO2 plume detection at SECARB Cranfield. International Journal of
    Greenhouse Gas Control (IJGGC), Special Issue: ‘The large-scale CO2 Injection Test at
    Cranfield, Mississippi, USA”. Vol 18, 421-429
  • Krahenbuhl, R. A., C. Martinez, Y. Li, and G. Flanagan, 2013: Integrating reservoir
    properties and seismic with borehole and surface time-lapse gravity data for monitoring CO2
    sequestration: A site investigation. 83nd Ann.Internat. Mtg, Soc. Expl. Geophys.,
    Expanded Abstracts
  • Li, Y., S. Devriese, R. Krahenbuhl, and K. Davis, 2013: Enhancement of magnetic data by
    stable downward continuation for UXO application. IEEE Trans. Geo. Sci & Remote Sens,
    51, 3605-3614
  • Martinez, C, Y. Li, R. Krahenbuhl, and M.A. Braga, 2013: 3D inversion of airborne gravity
    gradiometry data in mineral exploration: A case study in the Quadrilátero Ferrífero, Brazil.
    GEOPHYSICS, v78, #1, B1 – B11.
  • Reitz, A., R.A. Krahenbuhl, and Y. Li, 2013: Feasibility of time-lapse gravity gradiometry
    for SAGD monitoring. 83rd Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts
  • Hovorka, S., R.A. Krahenbuhl, A. Reitz, Y. Li, and K. Dodds, 2012: Evaluating time-lapse
    borehole gravity for CO2 plume detection at SECARB Cranfield. Intern. Conf. on
    Greenhouse Gas Technologies (ICGGT), Kyoto, Nov. 2012
  • Krahenbuhl, R. A., Y. Li, and T. Davis, 2012: Time-lapse gravity for reservoir monitoring:
    Feasibility and potential applications. 22nd Internat. Geophys. Conf. and Exhib., Australian
    Soc. Expl. Geophys (ASEG), Expanded Abstracts
  • Martinez, C., Y. Li, R.A. Krahenbuhl, and M.A. Braga, 2012: Structurally constrained
    lithology characterization using magnetic and gravity gradient data over an iron ore
    formation. 22nd Internat. Geophys. Conf. and Exhib., Australian Soc. Expl. Geophys
    (ASEG), Expanded Abstracts
  • Krahenbuhl, R.A., Y. Li, and C. Nind, 2012: The benefit of borehole gravity in horizontal
    monitoring wells for time-lapse applications. 82nd Ann.Internat. Mtg, Soc. Expl. Geophys.,
    Expanded Abstracts
  • Reitz, A., R.A. Krahenbuhl, Y. Li, and D DiFrancesco, 2012: Feasibility analysis of timelapse
    gravity gradiometry for reservoir monitoring. 82nd Ann.Internat. Mtg, Soc. Expl.
    Geophys., Expanded Abstracts
  • Foks, L., R.A. Krahenbuhl, and Y. Li, 2012: Adaptive sampling of potential-field data: A
    direct approach to compressive inversion. 82nd Ann.Internat. Mtg, Soc. Expl. Geophys.,
    Expanded Abstracts.
  • Krahenbuhl, R., and Y. Li, 2012: Time-lapse gravity: A numerical demonstration using
    robust inversion and joint interpretation of 4D surface and borehole data. GEOPHYSICS,
    v77, #2, G33 – G43.
  • Senseney, C., R. Krahenbuhl, and M. Mooney, 2012: Genetic algorithm to optimize layer
    parameters in light weight deflectometer backcalculation. Int. J. Geomechanics, ASCE,
    2012, doi: 10.1061/(ASCE) GM.1943-5622.0000222.
  • Krahenbuhl, R., Y. Li, and T. Davis, 2011 The Leading Edge, Special Issue (Time-
    Lapse measurements). Understanding the applications and limitations of time-lapse gravity
    for reservoir monitoring. The Leading Edge, 30, Issue 9, 1060 – 1068.
  • Krahenbuhl, R., and Li, Y., 2011, 4D gravity modeling: Integrating seismic data with highly
    constrained gravity inversions for effective reservoir monitoring. 12th International Congress
    of the Brazilian Geophysical Society (sBGF), Expanded Abstract
  • Martinez, C., Y. Li, R. Krahenbuhl, and M. Braga, 2011, Lithologic characterization using
    magnetic and gravity gradient data over an iron ore formation in the Quadrilatero Ferrifero,
    Minas Gerais, Brazil. 12th International Congress of the Brazilian Geophysical Society
    (sBGF), Expanded Abstract
  • Martinez, C., Y. Li, R. Krahenbuhl, and M. Braga, 2011, Lithologic characterization using
    magnetic and gravity gradient data over an iron ore formation. 12th International Congress of
    the Brazilian Geophysical Society (sBGF), Expanded Abstract accepted. 81st Ann.Internat.
    Mtg, Soc. Expl. Geophys., Expanded Abstract
  • Krahenbuhl, R., and Y. Li, 2011, Regularization, model weighting and solution appraisal in
    binary inversion for time-lapse gravity monitoring. GEM Beijing 2011: International
    Workshop on Gravity, Electrical & Magnetic Methods and their Applications. Expanded
    Abstract
  • Li, Y., and R. Krahenbuhl, 2011, A general framework for 3D interpretation of magnetic data
    affected by remanence and self-demagnetization. 12th International Congress of the Brazilian
    Geophysical Society (sBGF), Expanded Abstract
  • Krahenbuhl, R, Y. Li, and T. Davis, 2010, 4D gravity monitoring of fluid movement at Delhi
    Field, LA: A feasibility study with seismic and well data. 80th Ann.Internat. Mtg, Soc. Expl.
    Geophys., Expanded Abstracts
  • Mitchell, M.A., S.G.R Devriese, R.N. Frary, R. Krahenbuhl, and B.K. Todd, 2010,
    Archaeological investigations using geophysics at Chimney Rock Great House, Colorado.
    80th Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts
  • Martinez, C., Y. Li, R. Krahenbuhl, and M. Braga, 2010, 3D inversion of airborne gravity
    gradiometry for iron ore exploration in Brazil. 80th Ann.Internat. Mtg, Soc. Expl. Geophys.,
    Expanded Abstracts
  • Krahenbuhl, R., and Li, Y., 2009, Hybrid optimization for lithologic inversion and time-lapse
    monitoring using a binary formulation, Geophysics, 74, #6, I55-I65 (Accelerated Article)
  • Blum, T., K. van Wijk, L. Liberty, M. Batzle, R. Krahenbuhl, A. Revil, and R. Reynolds,
    2009, Characterization of a geothermal system in the Upper Arkansas Valley, CO., 79th
    Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts
  • Martinez, C., A. Dean, E. Goggin, R. Krahenbuhl, and B. Todd, 2009, Archaeological
    investigation of the Court Kiva in Chaco Canyon using geophysical methods, 79th
    Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts
  • Krahenbuhl, R., Y. Li and M. Nabighian, Improving UXO detection in magnetic
    environments through linear feature analysis. UXO/Countermine Forum 2009, Expanded
    Abstracts
  • Davis, K., Y. Li, R. Krahenbuhl, and M. Nabighian, 2009, Automatic detection of magnetic
    UXO anomalies in noisy environments. UXO/Countermine/Range Forum 2009, Expanded
    Abstracts
  • Davis, K., Kass, M.A., Krahenbuhl, R., and Li, Y., 2008, Survey design and model appraisal
    based on resolution analysis for 4D gravity monitoring. 78th Ann.Internat. Mtg, Soc. Expl.
    Geophys., Expanded Abstracts, 27, 731
  • Krahenbuhl, R, and Li, Y., 2008, Joint inversion of surface and borehole 4D gravity data for
    continuous characterization of fluid contact movement. 78th Ann.Internat. Mtg, Soc. Expl.
    Geophys., Expanded Abstracts
  • Krahenbuhl, R., and Li, Y., 2007, Influence of self-demagnetisation effect on data
    interpretation in strongly magnetic environments. 19th Internat. Conference & Exhibition,
    Australian Soc. Expl. Geophys., Expanded Abstracts
  • Krahenbuhl, R., and Li, Y., 2007, Influence of self-demagnetisation effect on data
    interpretation in strongly magnetic environments. 77th Ann.Internat. Mtg, Soc. Expl.
    Geophys., Expanded Abstracts
  • Krahenbuhl, R., and Li, Y., 2007, Separation of geologic noise in UXO magnetic data using
    wavelet transform. UXO/Countermine/Range Forum 2007, Expanded Abstracts
  • Krahenbuhl, R., and Li, Y., 2006, Inversion of gravity data using a binary formulation,
    Geophysical Journal International, 167, #2, 543
  • Krahenbuhl, R., and Li, Y., 2004, Hybrid optimization for a binary inverse problem. 74nd
    Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts ** Best Student Paper
    presented at conference
  • Krahenbuhl, R., and Hitzman, M., 2004, Geophysical modeling of two willemite deposits,
    Vazante (Brazil) and Beltana (Australia). 74nd Ann.Internat. Mtg, Soc. Expl. Geophys.,
    Expanded Abstracts.
  • Krahenbuhl, R., and Li, Y., 2002, Gravity inversion using a binary formulation. 72nd
    Ann.Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts.

Books and Contributions

  • Li, Y, & R.A Krahenbuhl, 2015, Gravity and magnetic methods in mineral
  • and oil & gas exploration and production. EAGE Education tour series
  • Dodds, K., R.A. Krahenbuhl, A. Reitz, Y. Li, and S. Hovorka, 2015,
    Chapter 36, Evaluating time-lapse borehole gravity for CO2 plume
    detection at SECARB Cranfield, in K.F. Gerdes, eds., Carbon Dioxide
    Capture for Storage in Deep Geologic Formations – Results for the CO2
    Capture Project, Volume 4, CCS Technology Development and
    Demonstration Results, CPL Press, Berks, UK
  • Krahenbuhl, R.A., 2005, Binary inversion of gravity data for salt imaging

Teaching

  • GPGN268 Geophysical Data Analysis (Current)
  • GPGN314 Applied Geophysics (Current)
  • GPGN438 Senior Design (Current)
  • GPGN486 Geophysics Field Camp (Current)
  • GPGN605 Inversion Theory (regular guest lecturer)
  • GPGN304 Gravity & Magnetic Methods (Previous)
  • GPGN303 Introduction to Gravity, Magnetic & Electrical Methods (Previous)
  • GPGN315 Geophysical Field Investigations (Previous)
  • GPGN498/598 Geophysical Methods for UXO Detection and Discrimination (Previous)