Interrelationships among Water Saturation, Permeability and Tortuosity for Shaly Sandstone Reservoirs in the Atlantic Ocean
Bibliographic record
Abstract
Petrophysical evaluation for shaly formations is more complicated than that for clean formations. Presence of various modes of shales and clays (laminated, structural and dispersed) makes the petrophysical evaluation even much more difficult. In this study, the effects of these modes on petrophysical parameters are discussed. Equations of water saturation, permeability and tortuosity, and the influence of other parameters and various properties and conditions on the three parameters, are also discussed. For the Hibernia and Terra Nova reservoirs, offshore of the eastern coast of Canada, the water saturation, permeability and tortuosity are determined and correlated to each other, using multi-log measurements. An increase in the water saturation and/or permeability is correlated to a decrease in the tortuosity. The three parameters are strongly interrelated to each other and affected by several lithological and physical characteristics.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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 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".