Conduction and Dielectric Relaxation Mechanisms in Athabasca Oil Sands with Application to Electrical Heating
Bibliographic record
Abstract
Six oil sands with increasing water and clay content were investigated for their electrical relaxation mechanisms using broadband dielectric spectroscopy with frequency (1 Hz to 1 MHz) and temperature (20–200 °C) to identify suitable operational strategies for electrical heating. Oil sands having least water and clay content showed a conduction relaxation mechanism following Jonscher’s law due to Maxwell–Wagner (MW) polarizations at bound water interfaces between bitumen and silica grains. MW polarizations due to free water interfaces between 1 kHz and 1 MHz were observed for oil sands having pendular connected water channels between sand grains. Poor oil sands with water entrapped in fine clusters had a dominant dc conduction mechanism. Additionally, all oil sands displayed dipole relaxations due to bitumen molecules between 100 kHz and 1 MHz. Electrical properties increased as temperatures were increased from 20 to 120 °C, whereas a further increase from 120 to 200 °C resulted in reduction of these properties and dominance of ac conduction, causing all oil sands to behave the same irrespective of their grade.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".