Heterogeneity and anisotropy of tight conglomerates: Mechanisms and implications
Bibliographic record
Abstract
Tight conglomerate reservoirs pose challenges to development due to their strong heterogeneity and anisotropy, while existing characterization technologies have limitations such as cumbersome sample preparation and low efficiency. Additionally, the microscale coupling mechanism among pores, elements, and components remains unclear. To address these issues, this study aims to reveal the controlling mechanisms of such reservoir features and establish an integrated characterization system. This system couples macrolens infrared thermal imaging, umbrella deconstruction, field emission scanning electron microscopy, and energy dispersive spectroscopy, and adopts eight-directional physical slicing to systematically characterize the pores, elements, and components of tight conglomerate reservoirs. Results indicate that pores are more developed in specific directions. Characteristic elements exhibit distinct directional enrichment and depletion: Some elements reach high contents in certain directions, while others drop to very low levels. Mineral contents show angle-dependent variations; for example, the proportion of weakly weathered feldspar increases significantly with increasing angle. All these features are synergistically controlled by the original sedimentary fabric and late-stage diagenesis. This work enriches the microscopic characterization theory of tight reservoirs, provides microscopic evidence for identifying favorable reservoir zones, and offers direct technical support for optimizing wellbore deployment and avoiding high-risk fracturing areas in engineering practice. Document Type: Original article Cited as: Zhou, B., Du, S., Wei, Y., Zong, Z., Duan, X., Wang, Y. Heterogeneity and anisotropy of tight conglomerates: Mechanisms and implications. Advances in Geo-Energy Research, 2025, 18(1): 7-20. https://doi.org/10.46690/ager.2025.10.02
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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 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| 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".