Benchmark hydrogeophysical data from a physical seismic model

摘要: Theoretical fluid flow models are used regularly to predict and analyze porous media but require verification against natural systems. Seismic monitoring in a controlled laboratory setting at nominal scale of 1:1000 the acoustic frequency range can help improve as well elasto-granular for uncompacted saturated-unsaturated soils. A mid-scale sand tank allows many highly repeatable, yet flexible, experimental configurations with different material compositions pump rates while still capturing phenomena such patchy saturation, fingering, or layering. The (~6x9x0.44m) contains heterogeneous pack (1.52-1.7phi). In set eight benchmark experiments water table is raised inside body increments ~0.05m. events (vertical component) recorded by pseudowalkaway 64-channel accelerometer array (20Hz-20kHz), 78kS/s, 100- scan stacks so optimize signal-to-noise ratio. Three screened sites monitor depth (+/-3mm) body. data sets SEG Y format publicly downloadable from internet (http://github.com/cageo/Lorenzo-2012), order allow comparisons seismic analyses. capillary fringe does not appear completely saturate, expected, because interpreted compressional-wave velocity values remain low (<210m/s). Even highest levels there no large impedance contrast across top generate clear reflector. Preliminary results indicate an immediate need several additional whose will be added online database. Future grow control show conditions before rise, surface 3D set. later experiments, buried sensors reduce attenuation effects in-situ saturation provide calibration values.