Study on microscopic production characteristics of crude oil in tight reservoirs displaced by CO <sub>2</sub> -assisted fracturing fluid
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Bibliographic record
Abstract
The CO2-assisted fracturing fluid displacement technology is of great significance for enhancing oil recovery (EOR) of tight reservoirs, while the characteristics and mechanism of microscopic production for CO2-assisted fracturing fluid are still unclear. In this study, the displacement experiments of fracturing fluid and CO2-assisted fracturing fluid were launched with two various methods, the nuclear magnetic resonance technology (NMR) and high-temperature and -pressure visualization system respectively. The experimental results show that crude oil in mesopores and macropores is mainly displaced by fracturing fluids, and the residual oil is mainly retained in micropores and small pores. CO2-assisted fracturing fluid improved the oil recovery of tight reservoirs, with more crude oil recovered from small pores, mesopores and macropores, and less residual oil content in the form of flake and droplet. This study provides a prospective EOR technology for the efficient development of tight reservoirs.
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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 | 0.001 | 0.002 |
| 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