| DOI: | 10.1306/09271010050
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| Scopus记录号: | 2-s2.0-79959962685
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| 论文题名: | Hydrocarbon breaching of a regional aquitard: The Devonian Ireton Formation, Bashaw area, Alberta, Canada |
| 作者: | Hearn M.R.; Machel H.G.; Rostron B.J.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1854
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| EISSN: | 1558-9584
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| 出版年: | 2011
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| 发表日期: | 2011
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| 卷: | 95, 期:6 | | 起始页码: | 1009
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| 结束页码: | 1037
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| 语种: | 英语
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| Scopus关键词: | Alberta , Canada
; Aquitards
; Carbonate content
; Devonians
; Differential compaction
; Dolomitization
; Hydrocarbon retention
; Lithofacies
; Low permeability
; Oil and gas
; Petroleum migration
; Carbonation
; Flow of fluids
; Hydrocarbons
; Reefs
; Stratigraphy
; Water content
; Aquifers
; aquitard
; carbonate
; compaction
; Devonian
; dolomitization
; facies
; fluid flow
; hydrocarbon entrapment
; lithofacies
; paleotopography
; permeability
; porosity
; replacement
; stratigraphy
; Alberta
; Canada
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| Scopus学科分类: | Energy
; Earth and Planetary Sciences
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| 英文摘要: | This study is an investigation of aquitard characteristics and hydrocarbon entrapment in the Upper Devonian strata of the Bashaw area of Alberta, Canada. Oil and gas are trapped at two stratigraphic levels, the Leduc-aged Bashaw Reef Complex (D-3) and the Camrose Member-Nisku Formation (D-2), which are separated by a low-permeability aquitard of the Ireton Formation, a marl with variable carbonate content. The Ireton aquitard provides the principal control to cross-formational fluid flow in the area. Over much of the Bashaw Reef Complex, the Ireton aquitard ranges from approximately 25 m (∼82 ft) thick to less than 1 m (<3.3 ft) over paleotopographic highs. Associated with thinning is a change in lithofacies and carbonate content from approximately 50% carbonate in the thicker, more basinal facies to more than 80% carbonate and shallower-water facies over the paleotopographic highs of the Leduc. Early replacement dolomitization, probably by density-driven reflux, generated intercrystal porosity on the order of 3 to 4% in the more carbonaterich facies, which rendered these parts of the aquitard less effective to later hydrocarbon retention. Subsequent differential compaction of the underlying reef complex led to a raised rim morphology and, in places, to a thickness inversion of the Ireton aquitard, that is, a thicker Ireton aquitard draped over the Leduc raised rims. As a result, petroleum migration occurred primarily along the raised rims and was trapped within the present-day highs that are draped by more than 10 m (>32.8 ft) of Ireton aquitard. Where the overlying Copyright © 2011. The American Association of Petroleum Geologists. All rights reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-79959962685&doi=10.1306%2f09271010050&partnerID=40&md5=54aa4e07981f77c9fa08e804e899e938
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/13423
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| Recommended Citation: | |
Hearn M.R.,Machel H.G.,Rostron B.J.. Hydrocarbon breaching of a regional aquitard: The Devonian Ireton Formation, Bashaw area, Alberta, Canada[J]. AAPG Bulletin,2011-01-01,95(6)
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