A SOURCE ROCK EVALUATION USING A HIGH RESOLUTION MICROANALYSIS APPROACH OF THE DEVONIAN BIRDBEAR FORMATION IN SOUTHERN SASKATCHEWAN
Bibliographic record
Abstract
Summary This paper presents the results from a high resolution, integrated geochemical and petrographical analytical assessment of source rock potential of the Devonian Birdbear Formation in southern Saskatchewan. The Birdbear Formation in borehole 12-23-15-14W2 was previously identified as having source potential, although at an unspecified depth. This study uses the high resolution sampling of core to clearly define zones of high source potential and those that have none within a correlatable lithologic framework. The Birdbear Formation is highly laminated in places and particularly within zones of relative source potential. This study utilizes a form of microanalyses, i.e. sampling at the millimeter to centimeter scale to more accurately define the geochemical and petrographic characteristics of each source layer as compared to bulk (meter scale) analyses typically employed. In this way two zones have been identified as having source potential, the stratigraphically higher zone has TOC ranging from 3.63 to 16.87 wt. % and the stratigraphically lower zone has TOC ranging from 0.89 to 7.07 wt. %, characterized as Type I and Type I/II. UV/fluorescence petrographic analysis has identified the organic matter as amorphous kerogen, classified as Bituminite. The Tmax range of the analysed samples is from 408 to 439 o C with an average of 427 o C which indicates the samples are immature to marginally mature. This study shows the importance of microanalyses (millimeter to centimeter scale) in comparison to bulk (meter scale) analyses.
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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 | 0.003 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| 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".