Characteristics and control methods of high-pressure in-situ combustion by heavy oil reservoir
Bibliographic record
Abstract
With the increase of buried depth, the in-situ combustion (ISC) of deep heavy oil reservoirs faces the problems of unclear high-pressure oxidation mechanism and high risk, and the conventional steam injection method cannot guarantee the effect. Taking Lukeqin Oilfield in Xinjiang, China, as an example, the oxidation characteristics of heavy oil under different pressures are analyzed by thermal analysis and combustion tube experiments, and the feasibility of high-pressure ISC is analyzed. The control method of high-pressure ISC in the field is obtained by numerical simulation. The results show that high pressure advances the oxidation stages of crude oil and accelerates the advance rate of the combustion front. The temperature of the combustion front is increased by more than 300 °C, but the combustion stability becomes worse. The activation energy and pressure of each oxidation stage show a power function decreasing relationship. High-pressure low-oxygen ISC reduces the ignition threshold temperature, and the combustion is stable and continuous, which is feasible in the development of deep heavy oil reservoirs. When the oxygen content is 8%, the combustion of high-pressure ISC is stable, the recovery rate is increased by 8%.
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How this classification was reachedexpand
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 | 0.001 | 0.001 |
| 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 | 0.001 |
| 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 teacher head, 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".