Real-time gas analysis at the JAPEX/JNOC/GSC et al. Mallik 5L-38 gas hydrate production research well
Bibliographic record
Abstract
The composition and depth distribution of gaseous components within the permafrost sedimentary setting of Mallik (Northwest Territories,Canada) were studied on-line during drilling of the JAPEX/JNOC/GSC et al. Mallik 4L-38 and 5L-38 wells and during a thermal production test at Mallik 5L-38. Decomposition experiments on gas-hydrate-bearing drill cores, carried out on site, as well as on-line mud-gas analysis while drilling yielded high methane concentrations, low helium concentrations, and high CH4/(C2H6+C3H8) ratios for gas hydrate. Based on these parameters, several gas-hydrate-bearing layers could be identified during drilling. During the thermal production test, short-duration variations in the gas concentrations were detected for CO2, He, and higher hydrocarbons. The variations in CO2 correlate positively with the temperature of the circulating brine due to the high solubility of CO2 that is strongly temperature dependent. The variations in the helium and hydrocarbon concentrations correlate directly and can be explained by heterogeneity in the gas composition of the stimulated horizon.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 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".