| Borehole acoustic reflection survey (BARS) using full waveform sonic data JBU Haldorsen, F Zhu, N Hirabyashi, WH Borland, H Kurniawan, ... first break 28 (7), 2010 | 41 | 2010 |
| Characteristics of waveforms recorded by azimuthally spaced hydrophones of sonic logging tool for incident plane waves N Hirabayashi, N Sakiyama, T Ikegami Geophysics 82 (6), D353-D368, 2017 | 39 | 2017 |
| Reflector imaging using trial reflector and crosscorrelation: Application to fracture imaging for sonic data N Hirabayashi Geophysics 81 (6), S433-S446, 2016 | 25 | 2016 |
| Methods and apparatus to image subsurface formation features N Hirabayashi, K Torii, H Yamamoto, J Haldorsen, A Voskamp US Patent 8,902,702, 2014 | 21 | 2014 |
| Wavefield separation for borehole acoustic reflection survey using parametric decomposition and waveform inversion N Hirabayashi, WS Leaney Geophysics 84 (4), D151-D159, 2019 | 13 | 2019 |
| Analysis refracted acoustic waves measured in a borehole N Bennett, JBU Haldorsen, H Yamamoto, N Hirabayasbi, T Endo, ... US Patent 8,813,869, 2014 | 13 | 2014 |
| Beamform processing for sonic imaging using monopole and dipole sources N Hirabayashi Geophysics 86 (1), D1-D14, 2021 | 11 | 2021 |
| Methods and systems for processing acoustic waveform data N Hirabayashi, WS Leaney, JBU Haldorsen US Patent 8,521,433, 2013 | 10 | 2013 |
| Fracture detection using borehole acoustic reflection survey data N Hirabayashi, K Torii, HV Yamamoto, JBU Haldorsen, A Voskamp SEG International Exposition and Annual Meeting, SEG-2010-0523, 2010 | 10 | 2010 |
| An integrated 3-D tomographic inversion: Application to multi-survey VSP data D Cao, N Hirabayashi, S Leaney, W Borland, K Hara, P Johnston 2000 SEG Annual Meeting, 2000 | 10* | 2000 |
| Reservoir structural characterization at multiple scales using vertical seismic profiling, 3D sonic imaging from dipole and monopole sources, and wellbore microresistivity … JA Donald, N Bennett, P Schlicht, F Van Kleef, R Verma, I Suliman, ... SPWLA Annual Logging Symposium, D083S006R003, 2020 | 8 | 2020 |
| Real-time event location using model-based estimation of arrival times and back azimuths of seismic phases N Hirabayashi Geophysics 81 (2), KS25-KS40, 2016 | 8 | 2016 |
| Wavefield separation for borehole acoustic reflection surveys using parametric inversion N Hirabayashi, WS Leaney, JBU Haldorsen SEG International Exposition and Annual Meeting, SEG-2008-0344, 2008 | 8 | 2008 |
| Existence of a second island of stability of predictor-corrector schemes for calculating synthetic seismograms RJ Geller, H Mizutani, N Hirabayashi Geophysical Journal International 188 (1), 253-262, 2012 | 6 | 2012 |
| Methods and Systems for Improving Microseismic Event Detection and Location N Hirabayashi, T Uchiyama, A Savenko US Patent App. 13/669,452, 2014 | 4 | 2014 |
| Method for synthesizing numerical operators, system for synthesizing operators, and simulation device R Geller, H Mizutani, N Hirabayashi, N Takeuchi US Patent 8,423,332, 2013 | 4 | 2013 |
| Velocity profile prediction using walkaway VSP data N Hirabayashi, WS Leaney SEG International Exposition and Annual Meeting, SEG-2006-3487, 2006 | 4 | 2006 |
| Seismic sensing systems and processes for using same N Hirabayashi, J Tulett, M Liyanage US Patent 10,768,329, 2020 | 3 | 2020 |
| Case Studies of Borehole Acoustic Reflection Survey (BARS) N Hirabayashi, GA Martinez, E Wielemaker SPWLA Formation Evaluation Symposium of Japan, SPWLA-JFES-2016-S, 2016 | 3 | 2016 |
| Superiority of optimally accurate schemes for numerical calculation of synthetic seismograms: 1-D examples N Hirabayashi, RJ Geller, H Mizutani Geophys. J. Int 142, 000-000, 2000 | 3 | 2000 |
