The Mallik Gas Hydrate Field: Lessons Learned from 37 Years of Gas Hydrate Investigation
Bibliographic record
Abstract
The Mallik gas hydrate field is located in the Mackenzie Delta in Canada’s Northwest Territories. The gas hydrate deposits consist of an interbedded sequence of highly concentrated gas-hydrate-bearing sands from 890 m to 1106 m depth within the crest of a regional anticline feature. Ground temperature conditions of this terrestrial gas hydrate occurrence are conditions by ~600 m of permafrost. Quantitative well log analyses and core studies have documented numerous discrete gas hydrate layers exceeding 110 m in total thickness. High gas hydrate saturation values, that in some cases exceed 80% of the pore volume, establish the Mallik gas hydrate field as one of the most concentrated gas hydrate reservoirs in the world. The abundant geologic and engineering data available at the site, the advantageous logistics presented by its terrestrial location, and the similarities to many offshore gas hydrate occurrences have made the Mallik site a very desirable location for gas hydrate research and development. This presentation will review history gas hydrate investigations at the Mallik site from the first discovery well in the winter of 1971/72 through to several production R&D studies in 1998, 2002 and 2007/08.
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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 | 0.011 | 0.013 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.004 | 0.003 |
| Science and technology studies | 0.002 | 0.006 |
| Scholarly communication | 0.005 | 0.007 |
| Open science | 0.002 | 0.004 |
| Research integrity | 0.001 | 0.003 |
| Insufficient payload (model declined to judge) | 0.002 | 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".