Effect of Asphaltene Aggregation on Rheological Properties of Diluted Athabasca Bitumen
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Bibliographic record
Abstract
Viscosity of bitumen solutions in heptol (80:20) and heptane above the onset of asphaltene precipitation decreases continually with aging for up to 30 days, while in toluene, there was no detectable change in the viscosity. The decrease of the viscosity at these conditions was related to the formation of asphaltene aggregates and aggregate clusters, which precipitated out and, as a result, decreased the bitumen (asphaltene) content of the solution. The observed time dependence of the viscosity reduction suggests that the asphaltene aggregation/precipitation is a continuous process with the time scale of weeks. The asphaltene aggregation/precipitation rate depends upon the aromaticity of the diluent, with higher rates observed for heptane compared to heptol (80:20). These results add to the current understanding of the relation between aggregation of asphaltenes and viscosity of diluted bitumen, which is important for improving heavy oil extraction and processing technologies.
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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 it