Richard Krahenbuhl

Research Associate 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

  • Wei, X.,  P. Garcia-Chevesich, F. Alejo, V. García, G. Martínez, F. Daneshvar, L.C. Bowling, E. Gonzáles, R. Krahenbuhl (PI), and J.E. McCray, 2021, Hydrologic analysis of an intensively irrigated area in Southern Peru using a crop-field scale framework: Water, 13, no. 3, 318, https://doi.org/10.3390/w13030318.
  • Garcia-Chevesich, P., X. Wei, J. Ticona, G. Martínez, J. Zea, V. García, F. Alejo, Y. Zhang, H. Flamme, A. Graber, P. Santi, J. McCray, E. Gonzáles, and R. Krahenbuhl (PI), 2021, The impact of agricultural irrigation on landslide triggering: A review from Chinese, English, and Spanish literature: Water, 13, no. 1, 10; https://doi.org/10.3390/w13010010.
  • 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, R.A. Krahenbuhl, 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., T. Irons, A. McAliley, R. Krahenbuhl, Y. 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, 78, no. 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, 77, no. 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,  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, no. 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, no. 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, no. 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)