In situ stresses in the Mallik area
Bibliographic record
Abstract
The orientations of the principal horizontal in situ stresses, OHmin and OHmax, were analyzedi n the Mallik area by investigating the local structural geology, regional borehole breakouts, drilling- induced fractures, borehole ellipticity, and shear-wave-velocity anisotropy. Vertical-stress magnitudes in the Mallik area were evaluated by analyzing historical and recently acquired core and log bulk-density data. Minimum magnitudes of horizontal in situ stress (OHmin) were estimated using data from deeper industry leak-off tests on wells within 70 km of the JAPEX/JNOC/GSC et al.Mallik 5L-38 gas hydrate production researchwell and a profile of microfracture stress tests conducted in the Mallik 5L-38 well with Schlumberger's Modular Dynamics Tester (MDT)TM. The microfracture tests do not show classic hydraulic-fracture-breakdown pressures, and there are several indications of the influence of natural fractures on the induced-fracture- propagation and closure pressures. The data suggest the existence of nearly isotropic, low-magnitude, horizontal in situ stresses in the gas-hydrate-bearing intervals in the Mallik 5L-38 well.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| 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".