Assessing caprock integrity for steam assisted gravity drainage projects in heavy oil reservoirs
Bibliographic record
Abstract
An integrated methodology has been developed to asses thermal mechanical caprock integrity issues for steam assisted gravity drainage (SAGD) processes in Alberta heavy oil reservoirs. Thermal recovery process in heavy oil reservoirs can comprise caprock integrity and be detrimental. Casing failures could occur if large strains develop along weak discontinuities in the caprock. High pressure and large volume cyclic steam stimulation could also breach the caprock along discontinuities or via a poorly-cemented wellbore. Since the SAGD process is run at lower steam pressures, it is not generally through to pose the same risk to caprock integrity. In this study, the geological, geomechanical and reservoir engineering information acquired from logs, cores and well tests were used to create a numerical model of the reservoir and its associated caprock. Different numerical tools are used to develop a representative model, depending on the nature of the caprock and the reservoir. 3 figs.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| 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".