Capillary‐Driven Transport and Precipitation of Salt in Heterogeneous Structures During Carbon Sequestration
Bibliographic record
Abstract
Abstract In the Aquistore deep saline CO 2 storage project, researchers observed that most of the salt distribution is associated with perforations in a zone with low injectivity. However, the impact of salt precipitation in heterogeneous porous media has not been fully clarified. In this paper, we conducted laboratory experiments on subsurface cores from the Aquistore project to investigate the influence of heterogeneous porous structures with varying permeabilities on salt precipitation. The results show that due to capillary‐driven transport, salt precipitation primarily occurs at the front end of low‐permeability structures and within high‐permeability structures, consistent with observations in the Aquistore injector. We first found that salt precipitation within fracture led to self‐sealing of fracture. When CO 2 was injected into a core containing horizontal fracture at a low flow rate, fracture closure was more likely to occur. Intermittent injection of low‐concentration brine was found to alleviate salt precipitation.
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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 | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| 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 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".