Delayed Time Full Wave Inversion (DTRWI)       ----- Patent Pending

• Delayed time gather (DTCIG) in FWI process:

  • Is sensitive to velocity perturbation and easy to analyze the model quality

  • Measures velocity inaccuracy using only kinematic information

  • Can be complimentary to data domain QC for FWI when geology is complicated

• DTFWI is an innovative and robust framework to invert complex velocity models using both diving wave and reflections, which

  • does not suffer from

    • cycle-skipping

    • amplitude discrepancies

    • sensitivity to source signature

    • dependence on low frequency

    • need for good initial model

  • provides a powerful volumetric QC