A novel preparation method for nondestructive multivoid structure core: Use thermosensitive phase-change material
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Bibliographic record
Abstract
Before developing energy minerals, core physical simulation experiments are essential to evaluate the effectiveness of development methods. This study proposes a nondestructive method for preparing multivoid structure cores using a thermosensitive phase-change material. Natural camphor powder, evenly mixed with quartz sand, volatilized to form secondary pores, with key volatilization factors determined experimentally. The effects of various parameters on core matrix porosity and permeability were systematically analyzed, and predictive equations were established using statistical methods. Additionally, camphor blocks of specific shapes and sizes, compressed under high pressure, volatilized within the cores to create fractures and caves. Nuclear magnetic resonance imaging (NMRI) reconstruction and three-dimensional core modeling confirmed that this method allowed precise control over the location and size of fractures/caves while maintaining core integrity. This work provides a cost-effective approach to fabricating artificial multivoid structure cores with controllable parameters, offering a valuable foundation for future oilfield development research.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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 it