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TitleRock-Eval/TOC analysis of selected core intervals from the Beaufort-Mackenzie Basin, northern Canada -- their source rock potential
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AuthorJiang, C; Obermajer, M; Su, A
SourceGeological Survey of Canada, Open File 7818, 2015, 166 pages, https://doi.org/10.4095/296586
Year2015
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
File formatpdf
ProvinceNorthern offshore region; Northwest Territories; Yukon
NTS107B; 107C; 107F; 117A; 117D
AreaBeaufort-Mackenzie Basin; Beaufort Sea; Mackenzie Delta; Tuktoyaktuk Peninsula
Lat/Long WENS-139.0000 -132.0000 70.5000 68.0000
Subjectsfossil fuels; stratigraphy; hydrocarbons; hydrocarbon potential; hydrocarbon maturation; petroleum exploration; exploration wells; cores; wells; source rocks; provenance; thermal maturation; oil; gas; shales; mudstones; Beaufort-Mackenzie Basin; rock-eval analyses; Cretaceous; Tertiary; Jurassic; Permian
Illustrationslocation maps; plots; tables; graphs
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Location
 
Natural Resources Canada Library - Ottawa (Earth Sciences)
 
ProgramWestern Arctic, High Arctic LIP, GEM2: Geo-mapping for Energy and Minerals
Released2015 06 18
AbstractA total of 134 samples collected from the dark-colored intervals of cores taken from oil and gas exploration wells in the Beaufort-Mackenzie Basin were analyzed using Rock-Eval/TOC technique. The aim of the project was to determine the petroleum source rock potential of selected Tertiary, Cretaceous and Jurassic intervals based on their organic richness, type of organic matter and their thermal maturity. This Rock-Eval reconnaissance will provide guidance for further oil-source correlation studies to better understand the petroleum systems in the Beaufort-Mackenzie Basin. Well cores were selected based on core description by Dixon (2002) and visual observation of the cores. Care has been taken to avoid intervals with possible drilling mud contamination.
Rock-Eval analytical results indicate that the Tertiary mudstone and coal measures contain immature to marginally mature Type III organic matter. TOC content of the Tertiary mudstone and shale sections can be as high as 5%. Its hydrocarbon potential is apparently lower than that of the Cretaceous and Jurassic rocks that appear to contain both Type III and Type II organic matter at similar or higher content. Thermal maturity of the Cretaceous and Jurassic potential source rocks ranges from marginally mature to over-mature, depending on their location in the basin. These results indicate that the Cretaceous and Jurassic source rocks have made significant contribution to oil and gas accumulations in the Beaufort-Mackenzie Basin.
Summary(Plain Language Summary, not published)
Rock-Eval pyrolysis was performed on 134 cored shale, mudstone or coal samples from Beaufort-Mackenzie basin ranging in age from Jurassic, Cretaceous to Tertiary. The results have been interpreted in terms of their organic richness, type of organic matter, and their thermal maturity in order to evaluate their source rock potential.
GEOSCAN ID296586