DOI: | 10.1306/08071313039
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Scopus记录号: | 2-s2.0-84898066022
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论文题名: | Athabasca oil sands: Megatrap restoration and charge timing |
作者: | Tozer R.S.J.; Choi A.P.; Pietras J.T.; Tanasichuk D.J.
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刊名: | AAPG Bulletin
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ISSN: | 0149-1562
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EISSN: | 1558-9292
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出版年: | 2014
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发表日期: | 2014
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卷: | 98, 期:3 | 起始页码: | 429
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结束页码: | 447
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语种: | 英语
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Scopus关键词: | Oil sands
; Restoration
; Athabasca oil sands
; Basement rocks
; Canadian shields
; Charge models
; Flexural loading
; Late cretaceous
; Maximum amplitude
; Western canada sedimentary basins
; Bituminous materials
; anticline
; Cretaceous
; kimberlite
; oil sand
; outcrop
; overburden
; Paleocene
; Santonian
; sedimentary basin
; Alberta
; Athabasca Oil Sands
; Canada
; Canadian Shield
; Western Canada Sedimentary Basin
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Scopus学科分类: | Energy
; Earth and Planetary Sciences
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英文摘要: | The petroleum trap for the Athabasca oil sands has remained elusive because it was destroyed by flexural loading of the Western Canada Sedimentary Basin during the Late Cretaceous and Paleocene. The original trap extent is preserved because the oil was biodegraded to immobile bitumen as the trap was being charged during the Late Cretaceous. Using well and outcrop data, it is possible to reconstruct the Cretaceous overburden horizons beyond the limit of present-day erosion. Sequential restoration of the reconstructed horizons reveals a megatrap at the top of the Wabiskaw-McMurray reservoir in the Athabasca area at 84 Ma (late Santonian). The megatrap is a four-way anticline with dimensions 285 x 125 km (177x78 mi) and maximum amplitude of60m(197ft). The southeastern margin of the anticline shows good conformance to the bitumen edge for 140 km (87 mi). To the northeast of the anticline, bitumen is present in a shallower trap domain in what is interpreted to be an onlap trap onto the Canadian Shield; leakage along the onlap edge is indicated by tarry bitumen outliers preserved in basement rocks farther to the northeast. Peripheral trap domains that lie below the paleospillpoint, in northern, southern, and southwestern Athabasca, and Wabasca, are interpreted to represent a late charge of oil that was trapped by bitumen already emplaced in the anticline and the northeastern onlap trap. This is consistent with kimberlite intrusions containing live bitumen, which indicate that the northern trap domain was charged not before 78 Ma. The trap restoration has been tested using bitumen-water contact well picks. The restored picks fall into groups that are consistent both with the trap domains determined from the top reservoir restoration and the conceptual charge model in which the four-way anticline was filled first, followed by the northeastern onlap trap, and then the peripheral trap domains. © 2014. The American Association of Petroleum Geologists. All rights reserved. |
URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84898066022&doi=10.1306%2f08071313039&partnerID=40&md5=1c052c865385ee548e82f2334a4a48ba
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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/13133
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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: |
Tozer R.S.J.,Choi A.P.,Pietras J.T.,et al. Athabasca oil sands: Megatrap restoration and charge timing[J]. AAPG Bulletin,2014-01-01,98(3)
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