Determination of Gas Permeability of Tight Reservoir Cores without Using Klinkenberg Correlation
Bibliographic record
Abstract
Abstract This paper reports the laboratory measurements of gas permeability for tight reservoir core samples with various upstream, downstream, and average pressures. Measurements are conducted with backpressures from atmospheric pressure up to 9.3 MPa. It is found that exerting a backpressure at the outlet of the core sample can effectively reduce the gas slip effect and improve the permeability measurements. When the backpressure reaches a certain level, defined as the minimum backpressure, the gas slip effect can be eliminated so that non-slip gas permeability can be obtained without using Klinkenberg correlation. When the backpressure exceeds the minimum backpressure the measured non-slip permeability is a constant for a given core sample. From this finding, a method of directly determining gas permeability of tight reservoir cores is provided. The experimental results also indicate that the minimum backpressure increases with decrease in permeability of tight reservoir cores. The concept and technique can be applied in the measurement of effective/relative gas permeability in multiphase systems where Klinkenberg correlation cannot be used to correct the gas slip effect.
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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 | 0.000 | 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 | 0.000 |
| 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 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".