Pore pressure patterns in Tertiary successions and hydrodynamic implications, Beaufort-Mackenzie Basin, Canada
Bibliographic record
Abstract
Research Article| March 01, 2010 Pore pressure patterns in Tertiary successions and hydrodynamic implications, Beaufort-Mackenzie Basin, Canada Zhuoheng Chen; Zhuoheng Chen Geological Survey of Canada, 3303–33 Street NW, Calgary, AB T2L 2A7 Search for other works by this author on: GSW Google Scholar Dale R. Issler; Dale R. Issler Geological Survey of Canada, 3303–33 Street NW, Calgary, AB T2L 2A7 Search for other works by this author on: GSW Google Scholar Kirk G. Osadetz; Kirk G. Osadetz Geological Survey of Canada, 3303–33 Street NW, Calgary, AB T2L 2A7 Search for other works by this author on: GSW Google Scholar Stephen E. Grasby Stephen E. Grasby Geological Survey of Canada, 3303–33 Street NW, Calgary, AB T2L 2A7 Search for other works by this author on: GSW Google Scholar Author and Article Information Zhuoheng Chen Geological Survey of Canada, 3303–33 Street NW, Calgary, AB T2L 2A7 Dale R. Issler Geological Survey of Canada, 3303–33 Street NW, Calgary, AB T2L 2A7 Kirk G. Osadetz Geological Survey of Canada, 3303–33 Street NW, Calgary, AB T2L 2A7 Stephen E. Grasby Geological Survey of Canada, 3303–33 Street NW, Calgary, AB T2L 2A7 Publisher: Canadian Energy Geoscience Association Accepted: 14 Mar 2010 First Online: 02 Mar 2017 Online ISSN: 2368-0261 Print ISSN: 0007-4802 © The Society of Canadian Petroleum Geologists Bulletin of Canadian Petroleum Geology (2010) 58 (1): 3–16. https://doi.org/10.2113/gscpgbull.58.1.3 Article history Accepted: 14 Mar 2010 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Zhuoheng Chen, Dale R. Issler, Kirk G. Osadetz, Stephen E. Grasby; Pore pressure patterns in Tertiary successions and hydrodynamic implications, Beaufort-Mackenzie Basin, Canada. Bulletin of Canadian Petroleum Geology 2010;; 58 (1): 3–16. doi: https://doi.org/10.2113/gscpgbull.58.1.3 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of Canadian Petroleum Geology Search Advanced Search Abstract Mud weight and pore pressure (drill stem test, repeat formation tester) data from 250 exploration wells were used to investigate the fluid pressure regime of the Beaufort-Mackenzie Basin. Four patterns of pore pressure variation with depth are recognized, each of which is associated with a specific tectono-stratigraphic domain and reflects the interplay between compaction and tectonics, or other geological factors causing or redistributing the overpressure. Overpressure in the southwest Beaufort Sea is likely to be a result of a combination of compaction and northeast-southwest contractional tectonics. In the north, shale diapirism may create fracture systems on top of anticlines, causing migration of overpressured fluid to a shallower depth. In the center of the Mackenzie Delta, where listric faulting prevails, compaction is the major controlling factor and the depth of overpressure depends on lithology and rate of deposition. Overpressure is mainly confined to Tertiary sedimentary successions but it may exist in pre-Tertiary strata (as inferred from mud weight data in a few wells) along the southeast basin margin, possibly in association with gas generating source rocks of Cretaceous age. The spatial variations of pore pressure at given depths, as well as along specific stratigraphic sequences, indicate that basin-scale flow is primarily driven by the upward expulsion of overpressured fluids. Analysis of pore pressure patterns suggests that regional fault zones can be both a barrier and a preferred flow path network to deep fluid fluxes. In general, fault zones are more likely to be regional barriers to lateral flow in an aquifer, but are the preferred flow networks for vertical fluid migration. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.005 |
| Science and technology studies | 0.003 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.007 | 0.001 |
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".