On “Seismic impedance inversion and interpretation of gas carbonate reservoir in the Alberta Foothills, western Canada” (G. B. Madiba and G. A. McMechan, 2003, G <scp>EOPHYSICS</scp> , 68, 1460–1469).
Bibliographic record
Abstract
Abstract It is always interesting to read articles about an area and geology I am familiar with, rather than articles where authors do not present enough data to fully understand the subject (well locations, well logs, scales, etc.). However, it is disconcerting to find that the authors presented seismic data with the western end on the right side. This is the opposite orientation from previously published papers and common standards. Obviously, the intention of the authors was to present the use of new technology in this specific area. As is always the case, new technology needs to be explained simply and supported with convincing field examples. Unfortunately, the authors did not achieve this goal. Their application might be correct, but it was applied to the wrong level. In my opinion, the author's identification of the Turner Valley gas reservoir is wrong. Their Wabamun reflection is, in reality, roughly at the Turner Valley (Nordegg) level, so that all the conclusions are related to the pre-Cardium clastics and not to the carbonate gas reservoir (see reference: Dechesne and Murara, 1996). It appears that the authors used the 16–28–28–8W5 well. Had they used two other wells, 12–26 and 10–26 (both with the same surface position, CMP 690), they would have realized that the Turner Valley reflection is much deeper and correlates well with the 16–28 well (note: all three wells are publicly available, have sonic logs, and were drilled in 1992–1993). The apparent positive indication, in a no-gas interval, does not discard applied technology but shows that a complicated geological situation (elevation, near-surface condition and complicated ray paths) could lead to a wrong interpretation.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
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".