Thermal conductivity of sediments within the gas-hydrate-bearing interval at the JAPEX/JNOC/GSC et al. Mallik 5L-38 gas hydrate production research well
Bibliographic record
Abstract
Three separate techniques were employed to investigate the thermal conductivity of unconsolidated sediments within the gas-hydrate-bearing reservoir at the Mallik gas hydrate production research site. A miniature needle probe was used to obtain thermal-conductivity measurements of quartz sand and a core specimen recovered from the Mallik reservoir. Measurements were obtained for various pore-water phases relevant to the Mallik geological setting, including pore occupancy by liquid water, gas hydrate, and ice. Measured thermal conductivities were compared to the predictions of an empirical model, which generates estimates of thermal conductivity based on the prescribed physical properties of sediments. Finally, calculations based on ground-temperature data and an estimate of the local geothermal heat flux identified distinct zonal variations in thermal conductivity within the broader gas-hydrate-bearing interval in the Mallik reservoir. These zonal variations are clearly related to variations in sediment character, rather than to the presence or absence of gas hydrate.
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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 | 0.001 | 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) | 0.001 | 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".