Modifications to Butler Theory for Geomechanical Effects at the Edge of SAGD Steam Chamber. Part I: Drained Condition
Bibliographic record
Abstract
Abstract Steam-assisted gravity drainage (SAGD) has been demonstrated to be a successful thermal recovery technique for recovering bitumen from oil sand reservoirs where the viscosity of the bitumen is typically hundreds of thousands to millions of centipoise. High pressure and high temperature steam injection cause significant stress changes at the edge of the steam chamber including shear dilation which, in turn, can enhance the absolute permeability. The importance of considering geomechanical effects in SAGD process has been extensively discussed in the literature but geomechanical effects have been neglected in the classic SAGD analytical models. All analytical models are typically incapable of fully predicting actuall SAGD production rates without using a correction factor; this can be a result of neglecting geomechanical effects. In the research documented here, we examine geomechanical enhancement at the edge of steam chamber where the oil sand has been sheared under thermal stimulation. We describe a mechanism and evaluate the oil drainage parallel to the interface of steam chamber caused by permeability enhancement from thermal stresses. Finally, we present a modified Butler's Theory that includes geomechanical effects. The results are directly applicable to understanding the geomechanical effects on oil drainage flow at the edge of SAGD chamber.
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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) | 0.001 | 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".