History Match of the UTF Phase A Project with Coupled Reservoir Geomechanical Simulation
Bibliographic record
Abstract
Abstract Field operation of the UTF Phase A SAGD project started in November 1987 and the whole production period terminated in October 1990. The success of this practical SAGD project has been used as a guide for a great number of field SAGD applications today. In order to understand the realistic interactions between fluid flow and geomechanical behavior of the reservoir during the SAGD operation, the coupled reservoir geomechanical simulation methodology was applied to history match the measured performance of the pilot. Reservoir and geomechanical responses as a result of the SAGD operation were available from an extensive instrumentation program designed for this project. Coupled simulation predictions of reservoir pressure, reservoir temperature, horizontal displacement, vertical strain, and volumetric strain were all compared with the data obtained from the field survey. These comparisons show that the coupled reservoir geomechanical simulation methodology has the potential to capture both reservoir and geomechanical physics appropriately while history matching the performance of a SAGD project. In particular, the steam chamber propagation modes both in the field and in the simulation were also discussed relative to the history of the Phase A pilot. Introduction The methodology of the coupled reservoir geomechanical simulations has been developed and tested successfully (Li, et al., 2003). However, the methodology needs to be verified based on a practical field application of the SAGD process. Fortunately, the UTF Phase A project provided a variety of data measured in the field over the period of the SAGD operation, which can be used for the history match of the SAGD process to verify this methodology. The available data include bottom hole pressures of each injector and producer, reservoir pressure, temperature, vertical strain, vertical displacement of the reservoir top, horizontal displacement, horizontal strain, and volumetric strain inside the reservoir during the SAGD operation. The objective of this paper is to establish the oil sands reservoir model and geomechanical model based on the available and assumed reservoir properties. Thereafter, conduct the coupled reservoir geomechanical simulation and compare the simulation performance with that obtained from the field. Finally, sensitivity studies were conducted to examine the relative influence of reservoir parameters on the SAGD predictions. PROJECT AND RESERVOIR DESCRIPTION The Alberta Oil Sands Technology and Research Authority (AOSTRA) initiated a feasibility study on the construction of an Underground Test Facility (UTF) in 1982, which were based on two discrete but complementary technologies:the Shaft and Tunnel Access Concept (SATAC) andhorizontal well technology for in situ recovery of oil sands reservoir. A detailed design of the UTF was completed in January 1982 and construction began in June 1984. The SAGD process was selected for initial piloting at UTF in 1985. Field operation of the Phase A SAGD project started in November 1987 and the whole production period terminated in October 1990. The AOSTRA Underground Test Facility (UTF) is located 60 km northwest of Fort McMurray, Alberta, Canada, within the area of Township 93 and Range 12. It is about 20 km west of the Syncrude Canada surface mining operation area.
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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".