DOI: 10.1306/04061009169
Scopus记录号: 2-s2.0-78649771035
论文题名: Biogenically enhanced permeability: A petrographic analysis of Macaronichnus segregatus in the lower cretaceous bluesky formation Alberta Canada
作者: Gordon J.B. ; Pemberton S.G. ; Gingras M.K. ; Konhauser K.O.
刊名: AAPG Bulletin
ISSN: 0149-1901
EISSN: 1558-9631
出版年: 2010
发表日期: 2010
卷: 94, 期: 11 起始页码: 1779
结束页码: 1795
语种: 英语
Scopus关键词: Alberta
; Alberta , Canada
; Biogenically enhanced permeability
; Chemical constituents
; Grain segregation
; Light-Colored
; Lower Cretaceous
; Mechanical compaction
; Monocrystalline
; Petrographic analysis
; Pore space
; Reservoir quality
; Rock fragments
; Upper shoreface
; Compaction
; Magnetic anisotropy
; Quartz
; Sedimentology
; Segregation (metallography)
; Petroleum reservoir engineering
; bioturbation
; burrowing
; chert
; compaction
; core analysis
; Cretaceous
; fill
; gas production
; ichnology
; permeability
; petrography
; pore space
; quartz
; trace fossil
; Alberta
; Canada
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: A detailed petrographic analysis was conducted on several core samples from the Cretaceous-aged Bluesky Formation in the La Glace area in Alberta, Canada. Within the gas-producing zone of these upper shoreface sediments, a fine- to mid-medium-grained chert-rich litharenite is intensely bioturbated with Macaronichnus segregatus. Petrographic analysis showed that the burrow mantle is generally lined with dark-colored, ironrich (mainly chert, shale clasts, and organic grains) fragments, whereas the burrow fill contained mainly quartz and lightcolored chert fragments. The reason for the dark-colored grain segregation of the tracemaker is unclear, but in the Bluesky Formation presented in this study, grain segregation has improved the reservoir quality by effectively resorting compaction- and cement-resistant chert and quartz into the burrow fill. Primary reservoir quality can be preserved in the presence of chert as pore-occluding quartz overgrowths do not form on chert fragments as they do on monocrystalline quartz, thus leaving open, well-connected primary pores and hence elevated permeability. Chert fragments are resistant to the effects of mechanical compaction and are not easily squeezed into adjacent pore spaces as are ductile rock fragments. Further research is needed to test the chemical constituents of the grains that modern tracemakers ingest. This may lead to a better understanding of why sands burrowed with Macaronichnus and similar burrowed sediment can have elevated reservoir quality. Copyright ©2010. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-78649771035&doi=10.1306%2f04061009169&partnerID=40&md5=b237d4c50b82d360d23608cd4f5e3ee0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13470
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:
Gordon J.B.,Pemberton S.G.,Gingras M.K.,et al. Biogenically enhanced permeability: A petrographic analysis of Macaronichnus segregatus in the lower cretaceous bluesky formation Alberta Canada[J]. AAPG Bulletin,2010-01-01,94(11)