Analytic Method for the Estimation of Initial Producing GOR for a Horizontal Well With a Gas Cap
Bibliographic record
Abstract
Abstract Since the late 1980's there has been significant primary development of thin heavy oil and bitumen pools with horizontal wells in Western Canada. These pools were previously not developable as they did not have high enough transmissivity for economic vertical well development. Horizontal wells permitted primary development within this resource base by providing an alternative production geometry from which low transmissivity reservoirs could be economically produced. As development proceeds in this resource it is apparent that the producing Gas Oil Ratio (GOR) characteristic of such wells is not typical of vertical wells in conventional oils. For saturated heavy oil and bitumen reservoirs producing on solution gas drive the producing GOR's tend to be much higher than the initial solution GOR (Rs;) for the heavy oil or bitumen produced. In the event the wellbore intersects primary or secondary gas caps, the producing GOR can be dramatically higher than the solution GOR (Rs). This paper derives an analytic approach that demonstrates the potential impact on producing GOR of a small gas saturation intersected by a horizontal well in a heavy oil or bitumen.
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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 | 0.000 |
| 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".