Measurement of rock-core capillary pressure curves using a single-speed centrifuge and one-dimensional magnetic-resonance imaging
Bibliographic record
Abstract
Capillary pressure curves are widely used in materials, soil, and environmental sciences, and especially in the petroleum industry. The traditional (Hassler-Brunner) interpretation of centrifugal capillary pressure data is based on several assumptions. These assumptions are known to lead to significant errors in the measurement of capillary pressure curves. In this work, we propose a new "single-shot" method to measure the capillary pressure curve of a long sedimentary rock core using a single-speed centrifuge experiment and magnetic-resonance imaging to directly determine the water saturation distribution along the length of the sample. Since only a single moderate centrifuge speed is employed, the effect of gravity can be ignored and the outlet boundary condition of the core plug was maintained. The capillary pressure curve obtained by the single-shot method is remarkably consistent with results determined with conventional mercury-intrusion methods. The proposed method is much faster and more precise than traditional centrifuge methods.
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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".