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TitleArtificial thermal maturation of source rocks at different thermal maturity levels: application to the Triassic Montney and Doig formations in the Western Canada Sedimentary Basin
AuthorRomero-Sarmiento, M -F; Euzen, T; Rohais, S; Jiang, C; Littke, R
SourceOrganic Geochemistry vol. 97, 2016 p. 148-162,
Alt SeriesEarth Sciences Sector, Contribution Series 20150437
Mediapaper; on-line; digital
File formatpdf
NTS83M; 83N; 84C; 84D; 84E/04
AreaPeace River
Lat/Long WENS-120.0000 -116.0000 57.5000 55.0000
Subjectsgeochemistry; organic geochemistry; thermal maturation; petrography; petrographic analyses; pyrolysis; Western Canada Sedimentary Basin; Montney Formation; Doig Formation; Mesozoic; Triassic
Illustrationslocation maps; stratigraphic sections; histograms; photomicrographs
ProgramShale-hosted petroleum ressource assesment, Geoscience for New Energy Supply (GNES)
AbstractArtificial thermal maturation of petroleum source rocks is widely performed by either open- or closedsystem pyrolysis. These experiments are performed usually on immature source rock or isolated kerogen samples to quantify petroleum generation potential and to calculate kinetic parameters. Here, we characterize a maturation series from the Triassic Montney and Doig formations in the Western Canada Sedimentary Basin (WCSB), in order to investigate the evolution of the source rock properties and their corresponding kerogen kinetic parameters as a function of the thermal maturity. Organic petrography determined the thermal maturity and the spatial distribution of organic matter particles. Rock-Eval Shale Play analyses were then applied to assess the presence of both free and sorbed hydrocarbons still contained in the sample as well as the hydrocarbon generation potential. Based on vitrinite reflectance values, three kerogen samples from the Doig Formation and one kerogen sample from the Montney Formation at different thermal maturity levels were selected for analysis of bulk kinetic parameters (e.g., activation energy distribution, frequency factor) using programmed open-system pyrolysis. Additionally, we evaluated the type of hydrocarbons and determined the molecular composition of organic compounds that comprise the first two Rock-Eval peaks (Sh0 and Sh1) obtained during the improved thermovaporization. TD-GC-MS-FID analyses were carried out on rock samples sequentially from 100 C to 200 C and then from 200 C to 350 C in order to characterize the composition of hydrocarbons represented by each Rock-Eval Shale Play peak. Free and sorbed low-to-medium molecular weight aliphatic and aromatic hydrocarbons (
Summary(Plain Language Summary, not published)
Shale source rock samples of various thermal maturity levels from Western Canada Sedimentary Basin have been analyzed by Rock-Eval pyrolysis and petrographic observations. The purpose was to investigate the evolution of their hydrocarbon potential with maturation and its relationship to their organic maceral compositions.