SGP Annual Research Update 2024

Machine learning applications in geophysics

Selected studies:

• Automatic facies classification of acoustic image logs using SwinV2-Unet [Geophysics 2024]
• Machine Learning Developments and Applications in Solid‐Earth Geosciences Fad or Future? [JGR: Solid Earth 2023]
• Neural network-based CO2 interpretation from 4D Sleipner seismic images [SEG Extended Abstract 2021] [YouTube Video]
• 3D Carbonate Digital Rock Reconstruction Using Progressive Growing GAN [JGR: Solid Earth 2021] [YouTube Video]
• Shale Anisotropy Model Building Based on Deep Neural Networks [JGR：Solid Earth 2019]

Geophysical monitoring for environmental changes

Selected studies:

• Road condition monitoring using seismic data [Recorded on DAS Video 2024] [Recorded on nodal seismometers Video 2023]
• Seismic attenuation monitoring in Illinois [with sparse traffic Video 1] [with rural traffic Video 2] [with trains Video 3]
• Seismic attenuation monitoring using road traffic signals in Singapore [GRL 2023] [YouTube Video]
• Geophysical monitoring for tunnel construction [YouTube Video]
• Urban Running Activity Detected Using a Seismic Sensor during COVID-19 Pandemic [SRL 2021] [YouTube Video]
• Urban Near-Surface Seismic Monitoring Using Distributed Acoustic Sensing [Geophysical Research Letters 2019]

Carbon capture and sequestration in the subsurface

Selected studies:

• Carbon source-sink mapping for CCS in ASEAN [YouTube Video 2024]
• Equity study in energy transition [YouTube Video 2024]
• Carbon sequestration in the subsurface: The atlas and the monitoring [YouTube Video 2023]

Acoustic imaging and inversion

Selected studies:

• Least-squares extended reverse time migration with randomly sampled space shifts [Geophysics 2020]
• Q-interface imaging using accumulative attenuation estimation [Geophysics 2020]
• Least-squares reverse time migration in the presence of velocity errors [Geophysics 2019]
• Full-waveform inversion with randomized space shift [The Leading Edge 2019]
• Joint least-squares reverse time migration of primary and prismatic waves [Geophysics 2019]

Elastic imaging and inversion

Selected studies:

• Source-free converted-wave reverse time migration: Formulation and limitations [Geophysics 2019]
• Elastic reverse time migration using acoustic propagators [Geophysics 2018]

Rock physics model building

Selected studies:

• Shale Anisotropy Estimation From Logs in Vertical Wells [JGR: Solid Earth 2019] [Source code]
• Dependency of flow and transport properties on aperture distributions and compression states [Geophysical Prospecting 2018]
• Hydraulic fracturing in a penny-shaped crack. Part I: Methodology and testing of frozen sand [Journal of Natural Gas Science and Engineering 2018]
• Hydraulic fracturing in a penny-shaped crack. Part II: Testing the frackability of methane hydrate-bearing sand [Journal of Natural Gas Science and Engineering 2018]

Borehole acoustic

Selected studies:

• Post-processing of background noise from SCPT auto source signal: A feasibility study for soil type classification [Measurement 2020]
• Determination of formation shear attenuation from dipole sonic log data [Geophysics 2019]
• Detection of formation S-wave in a slow formation using a monopole acoustic logging-while-drilling tool.pdf [Geophysics 2018]