Bibliographic record
Abstract
Well logs are often used for the estimation of seismic wavelets. The phase is obtained by forcing a well‐derived synthetic to match the seismic, thus assuming the well log provides ground truth. However, well logs are not always available and can predict different phase corrections at nearby locations. Thus, a wavelet estimation method that can reliably predict phase from the seismic alone is required. We test three statistical wavelet estimation techniques against the deterministic method of seismic‐to‐well ties. We explore how the choice of method influences the estimated wavelet phase, with the aim of finding a statistical method which consistently predicts a phase in agreement with well logs. The statistical method of kurtosis maximization by constant phase rotation was consistently able to extract a phase in agreement with seismic‐to‐well ties. Furthermore, the second method based on a modified mutual‐information‐rate criterion provided frequency‐dependent phase wavelets where the deterministic method could not. Time‐varying wavelets were also estimated — a challenge for deterministic approaches due to the short logging sequence. We conclude that statistical techniques can be employed as quality control tools for the deterministic methods, a way of interpolating phase between wells, or act as standalone tools in the absence of wells.
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How this classification was reachedexpand
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 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".