DOI: 10.1306/11141111064
Scopus记录号: 2-s2.0-84864230076
论文题名: Source rock contributions to the Lower Cretaceous heavy oil accumulations in Alberta: A basin modeling study
作者: Berbesi L.A. ; Di Primio R. ; Anka Z. ; Horsfield B. ; Higley D.K.
刊名: AAPG Bulletin
ISSN: 0149-1754
EISSN: 1558-9484
出版年: 2012
发表日期: 2012
卷: 96, 期: 7 起始页码: 1211
结束页码: 1234
语种: 英语
Scopus关键词: Alberta
; Athabasca
; Athabasca oil sands
; Basin modeling
; Carrier systems
; Devonians
; Heavy oil
; Jurassic
; Laramide
; Lower Cretaceous
; Oil accumulation
; Oil sand deposits
; Petroleum systems
; Rocky Mountains
; Sealing effect
; Source rocks
; Total Organic Carbon
; Trapping efficiencies
; Well data
; Western canada sedimentary basins
; Hydrogen
; Oil sands
; Petroleum deposits
; Petroleum geology
; Rocks
; Sensitivity analysis
; Stratigraphy
; Three dimensional
; accumulation
; basin analysis
; calibration
; Cretaceous
; Devonian
; heavy oil
; hydrocarbon migration
; Jurassic
; Laramide orogeny
; Mississippian
; oil field
; oil sand
; sedimentary basin
; sensitivity analysis
; source rock
; total organic carbon
; Alberta
; Athabasca
; Canada
; Peace River
; Rocky Mountains
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: The origin of the immense oil sand deposits in Lower Cretaceous reservoirs of the Western Canada sedimentary basin is still a matter of debate, specifically with respect to the original in-place volumes and contributing source rocks. In this study, the contributions from the main source rocks were addressed using a three-dimensional petroleum system model calibrated to well data. A sensitivity analysis of source rock definition was performed in the case of the two main contributors, which are the Lower Jurassic Gordondale Member of the Fernie Group and the Upper Devonian-Lower Mississippian Exshaw Formation. This sensitivity analysis included variations of assigned total organic carbon and hydrogen index for both source intervals, and in the case of the Exshaw Formation, variations of thickness in areas beneath the Rocky Mountains were also considered. All of the modeled source rocks reached the early or main oil generation stages by 60 Ma, before the onset of the Laramide orogeny. Reconstructed oil accumulations were initially modest because of limited trapping efficiency. This was improved by defining lateral stratigraphic seals within the carrier system. An additional sealing effect by biodegraded oil may have hindered the migration of petroleum in the northern areas, but not to the east of Athabasca. In the latter case, the main trapping controls are dominantly stratigraphic and structural. Our model, based on available data, identifies the Gordondale source rock as the contributor of more than 54% of the oil in the Athabasca and Peace River accumulations, followed by minor amounts from Exshaw (15%) and other Devonian to Lower Jurassic source rocks. The proposed strong contribution of petroleum from the Exshaw Formation source rock to the Athabasca oil sands is only reproduced by assuming 25 m (82 ft) of mature Exshaw in the kitchen areas, with original total organic carbon of 9% or more. Copyright © 2012. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84864230076&doi=10.1306%2f11141111064&partnerID=40&md5=7600614ea42c423c9527620fd2afe593
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13324
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:
Berbesi L.A.,Di Primio R.,Anka Z.,et al. Source rock contributions to the Lower Cretaceous heavy oil accumulations in Alberta: A basin modeling study[J]. AAPG Bulletin,2012-01-01,96(7)