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DW Tomo

2D Refraction Tomography
Estimate subsurface velocity structures with efficient first-break picking and fast shortest path ray tracing
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Data input
  • Import all records of a survey line at one time
  • Efficiently assign geometry measured with slope or horizontal distance
  • Input elevation data
  • Optionally load first-break picks together with seismic data for reprocessing
  • Support most third-party picks formats
DW Tomo screenshot 0.0
Data processing
  • AGC, trace balance, and frequency filtering
  • Trigger delay correction
  • Undo or redo multiple steps in data processing
First-break picking
  • Manually pick first breaks with a trace magnifier
  • Automatically pick first breaks guided by velocity or waveform phase
  • Test layer velocity on refraction waveforms
  • Overlay shear waves of opposite polarity to assist picking
  • Merge multiple picks files
DW Tomo screenshot 1.0
  • Initial model building based on the travel time versus offset plot or a velocity file
  • Fast shortest path ray tracing
  • Regularized tomographic inversion with multiple constraints
  • Update the display of first arrivals and ray paths in real time
  • Display the picked and calculated first arrivals on seismic traces
  • Interactively pause and resume or stop the tomography procedure
  • Review results of each iteration with fitting error analysis
  • Display velocity sections with colours, contours, and editable lithologic symbols
  • Overlay velocity section with ray paths
  • Trim velocity section based on ray paths and receiver locations
  • Plot well data
  • Show receiver and shot point locations on velocity section
  • Picks file into REFRACTOR for conventional refraction analysis
  • Velocity section with a blanking file
  • Statics for reflection data processing
DW Tomo screenshot 3.0