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Diving-Wave Refraction Tomography

Robust near-surface velocity modeling using turning waves

We offer diving-wave refraction tomography to provide a reliable near-surface velocity model for reflection tomography iterations in a depth migration workflow, or static corrections for time processing.

Turning-ray tomography uses refracted first arrivals to compute a near-surface earth model by minimizing the difference between calculated and observed travel times. Because diving waves sample the near surface with more redundancy and with a greater angular range than reflected waves, we can converge on a more robust model using fewer iterations. This approach can be used in land, marine, or OBC environments.

 

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Reliable Near-Surface Velocity Models

An example of the improvement brought by diving-wave tomography and prestack depth migration to imaging below shallow anomalies, even in a relatively simple geological environment.
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