Bibliographic record
Abstract
We analyze data from a crosswell seismic survey that was conducted in 2004 at the Noel gas field located in northeastern British Columbia and operated by BP Canada Energy Company. The goal was to create high-resolution images of gas-bearing, but tight, sandstone channels 2400m to 2650m deep in the Cadomin and Nikanassin formations. Recording between two wells approximately 145m apart employed hydrophones and a piezoelectric vibrator source. The dominant frequencies in the crosswell seismograms are about 1000Hz to 1500Hz, with wavelengths on the order of 4m to 6m. Compared to wavelengths of about 100m that are usual for surface seismic data, the shorter wavelengths in the crosswell data provide significantly better resolution of beds 10m to 25m thick. A P-wave velocity tomogram was created from first arrival times using a back-projection that accounts for head wave arrivals. Wavefield separation isolated up- and down-going reflections. These reflections were mapped with a VSP-CDP method using ray-tracing and guided by the velocity tomogram. Seismic boundaries on the velocity tomogram and the reflectivity image correlate closely with the known geology.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 source (direct Gemma or distilled Codex), 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".