Elastic Full Waveform Inversion for Land Walkaway VSP Data from British Columbia, Canada
Why this work is in the frame
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Bibliographic record
Abstract
Summary Full waveform inversion (FWI) is capable of handling multicomponent borehole seismic data and reveals quantitative values of the subsurface medium properties, including compressional and shear-wave velocities. Careful treatment of the source wavelet is crucial for FWI success and is challenging task for land data because of the high variability of downgoing wavelets for different source positions caused by variations of near surface conditions. We present a feasibility study of anisotropic elastic FWI for the land walkaway vertical seismic profiling (VSP) data acquired in northeast British Columbia, Canada, with a vibrator source. FWI explained the data at medium frequencies and recovered a layered structure of the subsurface that agrees with reasonable accuracy with sonic measurements. The inverted source signature and shallow part of the model compensated for the variations of the downgoing wavelet.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it