All Stories

  1. DAS microseismic reflection imaging for hydraulic fracture and fault lineament characterization

    Article • Geophysics, March 2024, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  2. Testing of a Permanent Orbital Surface Source and Distributed Acoustic Sensing for monitoring of unconventional reservoirs: preliminary results from the Eagle Ford Shale

    Article • Geophysics, December 2020, Society of Exploration Geophysicists

    Jens Birkholzer, Jonathan Ajo-Franklin

  3. Using Dark Fiber and Distributed Acoustic Sensing for Near-Surface Characterization and Broadband Seismic Event Detection

    Article • July 2018, Center for Open Science

    Jonathan Ajo-Franklin

  4. Introduction to Interferometry of Fiber Optic Strain Measurements

    Article • June 2018, Center for Open Science

    Jonathan Ajo-Franklin

  5. Fiber-Optic Network Observations of Earthquake Wavefields

    Article • Geophysical Research Letters, December 2017, Wiley

    Jonathan Ajo-Franklin

  6. Distributed Acoustic Sensing for Seismic Monitoring of The Near Surface: A Traffic-Noise Interferometry Case Study

    Article • Scientific Reports, September 2017, Nature

    Jonathan Ajo-Franklin, Shan Dou

  7. Spatiotemporal changes of seismic attenuation caused by injected CO2 at the Frio-II pilot site, Dayton, TX, USA

    Article • Journal of Geophysical Research Solid Earth, September 2017, Wiley

    Jonathan Ajo-Franklin

  8. In situ measurement of velocity-stress sensitivity using crosswell continuous active-source seismic monitoring

    Article • Geophysics, September 2017, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  9. Time-lapse surface wave monitoring of permafrost thaw using distributed acoustic sensing and a permanent automated seismic source

    Article • August 2017, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin, Shan Dou

  10. Experimental evidence for dynamic friction on rock fractures from frequency-dependent nonlinear hysteresis and harmonic generation

    Article • Journal of Geophysical Research Solid Earth, July 2017, Wiley

    Jonathan Ajo-Franklin

  11. Pore-scale multiphase flow modeling and imaging of CO 2 exsolution in Sandstone

    Article • Journal of Petroleum Science and Engineering, July 2017, Elsevier

    Jonathan Ajo-Franklin

  12. Final Scientific/Technical Report for project “Geomechanical Monitoring for CO2 Hub Storage: Production and Injection at Kevin Dome

    Article • June 2017, Office of Scientific and Technical Information (OSTI)

    Jonathan Ajo-Franklin

  13. Pore-scale capillary pressure analysis using multi-scale X-ray micromotography

    Article • Advances in Water Resources, June 2017, Elsevier

    Jonathan Ajo-Franklin

  14. Strain-dependent partial slip on rock fractures under seismic-frequency torsion

    Article • Geophysical Research Letters, May 2017, American Geophysical Union (AGU)

    Jonathan Ajo-Franklin

  15. An effective-medium model for P-wave velocities of saturated, unconsolidated saline permafrost

    Article • Geophysics, May 2017, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin, Shan Dou

  16. Experimental development of low-frequency shear modulus and attenuation measurements in mated rock fractures: Shear mechanics due to asperity contact area changes with normal stress

    Article • Geophysics, March 2017, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  17. Surface orbital vibrator (SOV) and fiber-optic DAS: Field demonstration of economical, continuous-land seismic time-lapse monitoring from the Australian CO2CRC Otway site

    Article • September 2016, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  18. Interferometry of a roadside DAS array in Fairbanks, AK

    Article • September 2016, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  19. A 2.5D Reactive Transport Model for Fracture Alteration Simulation

    Article • Environmental Science & Technology, July 2016, American Chemical Society (ACS)

    Jonathan Ajo-Franklin

  20. A rock-physics investigation of unconsolidated saline permafrost: P-wave properties from laboratory ultrasonic measurements

    Article • Geophysics, January 2016, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin, Shan Dou

  21. IMAGING FRACTURE NETWORKS USING JOINT SEISMIC AND ELECTRICAL CHANGE DETECTION TECHNIQUES

    Article • January 2016, Geological Society of America

    Jonathan Ajo-Franklin

  22. Analysis of laboratory data on ultrasonic monitoring of permeability reduction due to biopolymer formation in unconsolidated granular media

    Article • Geophysical Prospecting, August 2015, Wiley

    Dr James Garland Berryman, Jonathan Ajo-Franklin

  23. Microbial Growth under Supercritical CO2

    Article • Applied and Environmental Microbiology, February 2015, ASM Journals

    Jonathan Ajo-Franklin

  24. Full-wavefield inversion of surface waves for mapping embedded low-velocity zones in permafrost

    Article • Geophysics, November 2014, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  25. Isotopic insights into microbial sulfur cycling in oil reservoirs

    Article • Frontiers in Microbiology, September 2014, Frontiers

    Jonathan Ajo-Franklin

  26. Pore-Scale Controls on Calcite Dissolution Rates from Flow-through Laboratory and Numerical Experiments

    Article • Environmental Science & Technology, July 2014, American Chemical Society (ACS)

    Jonathan Ajo-Franklin

  27. Bioclogging and Permeability Alteration byL. mesenteroidesin a Sandstone Reservoir: A Reactive Transport Modeling Study

    Article • Energy & Fuels, November 2013, American Chemical Society (ACS)

    Jonathan Ajo-Franklin

  28. High-frequency seismic response during permeability reduction due to biopolymer clogging in unconsolidated porous media

    Article • Geophysics, November 2013, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  29. Constraining CO2 simulations by coupled modeling and inversion of electrical resistance and gas composition data

    Article • International Journal of Greenhouse Gas Control, October 2013, Elsevier

    Jonathan Ajo-Franklin

  30. High-resolution characterization of a CO2 plume using crosswell seismic tomography: Cranfield, MS, USA

    Article • International Journal of Greenhouse Gas Control, October 2013, Elsevier

    Jonathan Ajo-Franklin

  31. Field testing of fiber-optic distributed acoustic sensing (DAS) for subsurface seismic monitoring

    Article • The Leading Edge, June 2013, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  32. Supercritical CO2 flow through a layered silica sand/calcite sand system: Experiment and modified maximal inscribed spheres analysis

    Article • International Journal of Greenhouse Gas Control, May 2013, Elsevier

    Jonathan Ajo-Franklin

  33. Synchrotron X-ray Micro-Tomography and Geological CO2Sequestration

    Article • January 2013, Wiley

    Jonathan Ajo-Franklin

  34. X-ray micro-tomography at the Advanced Light Source

    Article • October 2012, SPIE

    Jonathan Ajo-Franklin

  35. Potentials of Applying Surface-Wave Methods for Imaging Subsurface Properties in Permafrost Soils

    Article • September 2012, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  36. Pore-Scale Study of the Impact of Fracture and Wettability on Two-Phase Flow Properties of Rock

    Article • August 2012, Office of Scientific and Technical Information (OSTI)

    Jonathan Ajo-Franklin

  37. Measurement of accessible reactive surface area in a sandstone, with application to CO2 mineralization

    Article • Chemical Geology, July 2012, Elsevier

    Jonathan Ajo-Franklin

  38. Upscaling calcium carbonate precipitation rates from pore to continuum scale

    Article • Chemical Geology, July 2012, Elsevier

    Jonathan Ajo-Franklin

  39. Statistical segmentation and porosity quantification of 3D x-ray microtomography

    Article • September 2011, SPIE

    Jonathan Ajo-Franklin

  40. Constraining the reservoir model of an injected CO2 plume with crosswell CASSM at the Frio-II brine pilot

    Article • International Journal of Greenhouse Gas Control, July 2011, Elsevier

    Jonathan Ajo-Franklin

  41. Investigating biomineralization using synchrotron based X-ray computed microtomography

    Article • Geophysical Research Letters, April 2011, Wiley

    Jonathan Ajo-Franklin

  42. Hydrogeophysical Methods for Analyzing Aquifer Storage and Recovery Systems

    Article • Ground Water, February 2011, Wiley

    Jonathan Ajo-Franklin

  43. Multi‐level continuous active source seismic monitoring (ML‐CASSM): Mapping shallow hydrofracture evolution at a TCE contaminated site

    Article • January 2011, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  44. Seismic monitoring of permeability reduction due to biopolymer formation in unconsolidated materials

    Article • January 2011, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  45. A Multimodal 3D Imaging Study of Natural Gas Flow in Tight Sands

    Article • January 2011, Society of Petroleum Engineers (SPE)

    Jonathan Ajo-Franklin

  46. Geophysical monitoring and reactive transport modeling of ureolytically-driven calcium carbonate precipitation

    Article • Geochemical Transactions, January 2011, Springer Science + Business Media

    Jonathan Ajo-Franklin

  47. Monitoring a large volume CO2 injection: Year two results from SECARB project at Denbury’s Cranfield, Mississippi, USA

    Article • Energy Procedia, January 2011, Elsevier

    Jonathan Ajo-Franklin

  48. Pore-scale mechanisms of gas flow in tight sand reservoirs

    Article • November 2010, Office of Scientific and Technical Information (OSTI)

    Jonathan Ajo-Franklin

  49. On the complex conductivity signatures of calcite precipitation

    Article • Journal of Geophysical Research Atmospheres, May 2010, Wiley

    Jonathan Ajo-Franklin

  50. Optimal experiment design for time-lapse traveltime tomography

    Article • Geophysics, July 2009, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  51. Redatuming through a salt canopy and target-oriented salt-flank imaging

    Article • Geophysics, May 2008, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  52. Integration of crosswell CASSM (Continuous active source seismic monitoring) and flow modeling for imaging of a plume in a brine aquifer

    Article • January 2008, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  53. Frio II Brine Pilot: Report on GEOSEQ Activities

    Article • November 2007, Office of Scientific and Technical Information (OSTI)

    Jonathan Ajo-Franklin

  54. Continuous active-source seismic monitoring of C O2 injection in a brine aquifer

    Article • Geophysics, September 2007, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  55. Applying compactness constraints to differential traveltime tomography

    Article • Geophysics, July 2007, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  56. Ultrasonic properties of granular media saturated with DNAPL/water mixtures

    Article • Geophysical Research Letters, April 2007, Wiley

    Jonathan Ajo-Franklin

  57. Redatumming through a salt canopy — Another salt‐flank imaging strategy

    Article • January 2007, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  58. Relative particle motions of fluid and solid phases in porous media: A numerical study of seismic scattering in digitized granular models

    Article • January 2007, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  59. Continuous crosswell monitoring of CO2 injection in a brine aquifer

    Article • January 2007, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  60. A survey of the geophysical properties of chlorinated DNAPLs

    Article • Journal of Applied Geophysics, July 2006, Elsevier

    Jonathan Ajo-Franklin

  61. Imaging dipping sediments at a salt dome flank ‐ VSP seismic interferometry and reverse‐time migration

    Article • January 2006, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  62. Temporal integration of seismic traveltime tomography

    Article • January 2005, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  63. The dielectric properties of granular media saturated with DNAPL/water mixtures

    Article • Geophysical Research Letters, September 2004, Wiley

    Jonathan Ajo-Franklin

  64. Preliminary Characterization of a NAPL‐Contaminated Site Using Borehole Geophysical Techniques

    Article • January 2003, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin

  65. Effect of Immiscible Liquid Contaminants on P‐Wave Transmission through Natural Aquifer Samples

    Article • January 2003, Society of Exploration Geophysicists

    Jonathan Ajo-Franklin