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Permanent link (DOI): https://doi.org/10.7939/R35M62D7G

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Porosity and permeability in the Graminia Formation, Upper Devonian Winterburn Group in the Germain Field, northeastern Alberta Open Access

Descriptions

Other title
Subject/Keyword
porosity
Western Canada Sedimentary Basin
Graminia
Winterburn
permeability
bitumen
Frasnian
Blueridge
Devonian
Alberta
powdered dolomite
Famennian
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Black, Meghan E
Supervisor and department
Jones, Brian (Earth and Atmospheric Sciences)
Examining committee member and department
Harris, Nicholas B. (Earth and Atmospheric Sciences)
Gingras, Murray K. (Earth and Atmospheric Sciences)
Department
Department of Earth and Atmospheric Sciences
Specialization

Date accepted
2014-07-25T16:12:29Z
Graduation date
2014-11
Degree
Master of Science
Degree level
Master's
Abstract
The Upper Devonian Graminia Formation (Winterburn Group) found in the Germain Field of northeastern Alberta includes the Blueridge Member (Frasnian) and the Upper Graminia Member (Famennian). A green silty-shale paleosol overlies the formation in this area. The bitumen-bearing dolostones of this formation are divided into Facies A, B, C, D, E, and F based on mineralogy, fabric, and cement types. Facies A, B, C, and E are formed of very finely to finely crystalline dolomitic siltstones to silty dolostones that are variably cemented with calcite and dolomite. Facies D is a green silty-shale bed that lies between Facies C and E. Facies F is a powdered dolomite cemented with bitumen. The sediments of the Blueridge Member were deposited during a third order regression in an inner-ramp setting. The sediments of the Upper Graminia Member were deposited during a fall in sea level that caused the ramp to shallow into the peritidal to supratidal zone. The precise timing and formation of dolomite is not known, but is thought to be sabhka-related based on the depositional framework. Facies F (powdered dolomite) may have been produced by diagenetic changes associated with a period of karst/exposure. Porosity values range from 3 to 40% and average permeability values range from 5 to 450 md. The main types of porosity are intergranular/intercrystalline (very common), vuggy (common) and fracture (rare). The permeability is controlled by the intergranular/intercrystalline pores and fractures. The porosity and permeability values do not display any predictable patterns across the Germain Field.
Language
English
DOI
doi:10.7939/R35M62D7G
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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