RESERVOIR PRODUCTION BEHAVIOR IN A HYDRODYNAMICALLY CONNECTED FRACTURED CARBONATE, THE MISSISSIPPIAN DEBOLT FORMATION, SIKANNI AREA OF NE BRITISH COLUMBIA, CANADA
Bibliographic record
Abstract
The Mississippian Debolt Formation in the foothills of NE British Columbia traps gas in a number of faulted structures, one of the largest of which is the Sikanni Field, comprised of the Debolt A, B and C Pools. Hydrodynamic analysis in the vicinity of the Sikanni Field showed the presence of a fresh water charged aquifer in communication across major faults underlying the gas pools in the area. Analysis of early pressure data from the Sikanni Field indicated the presence of a common 400 meter gas column. The original gas in place for the C Pool calculated from decline analysis after 3 years of production was 227 BCF, with an assigned recovery factor of 85% for 190 BCF recoverable. To date the C pool has produced nearly 97 BCF but 6 of the 7 wells have watered out with only 43% of the gas recovered. Despite a downward revision of the OGIP to 193 BCF, yielding a 50% recovery factor to date, much of the gas remains unrecoverable. What happened to the remaining gas? Was the pool optimally developed? Could the early understanding of the hydrodynamic setting and pool behavior have pointed us towards a more accurate ultimate recovery factor for the C Pool? This paper will explore possible causes of the low recovery factor for the Sikanni C Pool. Unforeseen reservoir compartmentalization, water coning and a higher than anticipated volume of gas being stranded at residual gas saturation may explain why 50% of the OGIP has been orphaned.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 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 source (direct Gemma or distilled Codex), 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".