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Permanent link (DOI): https://doi.org/10.7939/R3280569B

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TIGHT GAS RESERVOIR CHARACTERIZATION IN MONTNEY FORMATION, NORTHEASTERN BRITISH COLUMBIA, WESTERN CANADA Open Access

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Other title
Subject/Keyword
unconventional hydrocarbon reseroir
sedimentology of the Montney Formation
Tight gas reservoir characterization
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Egbobawaye, Edwin I
Supervisor and department
Dr. Murray K. Gingras (Earth and Atmospheric Sciences)
Examining committee member and department
Dr. Karlis Muehlenbachs (Earth and Atmospheric Sciences)
Dr. S. George Pemberton (Earth and Atmospheric Sciences)
Dr. Vadim Kravchinsky (Department of Physics, University of Alberta)
Dr. Brian Pratt, Department of Geological Sciences, University of Saskatchewan, Canada (External Examiner).
Department
Department of Earth and Atmospheric Sciences
Specialization

Date accepted
2013-09-10T15:10:35Z
Graduation date
2013-11
Degree
Doctor of Philosophy
Degree level
Doctoral
Abstract
The Montney Formation is a primary focus of unconventional gas reservoir in northeastern British Columbia, Western Canada. This study presents the sedimentology and ichnology, Rock-Eval geochemistryand reservoir potential, C13 and O18 isotopic composition, and magnetostratigraphy correlation of the Montney Formation in the Fort St. John area (T86N, R23W and T74N, R13W), northeastern British Columbia. The Montney Formation consists of siltstone with subordinate interlaminated very fine-grained sandstone. Five lithofacies association were identified in the study interval: Lithofacies F-1 (organic rich, wavy to parallel laminated, black coloured siltstone); Lithofacies F-2 (very fine-grained sandstone interbedded with siltstone); Lithofacies F-3A (bioturbated silty-sandstone attributed to the Skolithos ichnofacies); Lithofacies F-3B (bioturbated siltstone attributed to Cruziana ichnofacies); Lithofacies F-4 (dolomitic, very fine-grained sandstone); and Lithofacies F-5 (massive siltstone). The depositional environments interpreted for the Montney Formation in the study area is lower shoreface through proximal offshore to distal offshore settings. Rock-Eval data (hydrogen Index and Oxygen Index) shows that Montney sediments contains mostly gas prone Type III/IV with subordinateType II kerogen, TOC ranges from 0.39 – 3.54 wt% with a rare spike of >10.9 wt% along the Montney / Doig boundary. The vitrinite reflectance data and Tmax shows that thermal maturity of the Montney Formation is in the realm of ‘peak gas’ generation window. Magnetostratiphy analyses from this study shows that the Montney Formation in the study area exhibits normal and reverse polarity intervals across the Upper Montney and Lower Doig formations boundary. The geomagnetic polarity correlation matched known intervals of the Triassic GPTS at 245 Ma. The results suggest that Lowermost Doig phosphatic zone (Montney / Doig boundary) occur within a single magnetostratigraphic interval characterized by a coplanar Trypanites – Glossifungites demarcated discontinuity surface, interpreted herein as a regionally correlatable surface.
Language
English
DOI
doi:10.7939/R3280569B
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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