Lithological, diagenetic, and organic controls on reservoir quality in the lower triasic Montney Formation, Pouce Coupe, Alberta
Bibliographic record
Abstract
The Lower Triassic Montney Formation is a major gas producer in the Western Canadian Sedimentary Basin. The tight gas/shale resources associated with this formation, however, are notoriously difficult to characterize using conventional methodologies due to the presence of heterogeneities below the scale of traditional log and core analysis. An innovative methodology is applied to investigate lithologic, diagenetic, inorganic and organic matter controls on permeability within the formation. Using a core gathered from the Pouce Coupe field, vertical permeability variations along the core were quantified using profile permeability. Microfacies were defined and compared with the profile permeability measurements; this comparison revealed that the finely laminated and uncemented regions were more permeable than areas of thicker bedding. Additional diagenetic and mineralogic controls on permeability were revealed through analysis of XRD and electron microprobe data. Organic matter was characterized using petrography and a slow heating Rock-Eval pyrolysis procedure, which demonstrated that the hydrocarbon in the samples primarily consists of a network of migrated, refractory bitumen. Profile permeability shows no strong relationship to the distribution of refractory hydrocarbons, suggesting that the organic matter does not contribute to permeability and may in fact be a flow inhibitor.
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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 | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 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 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".